····· lezzter Preis 15.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Future high-density magnetic data storage demands both, a detailed understanding of the magnetic reversal processes as well as basic concepts of local magnetization switching, for instance by the injection of a spin-polarized current. Spin-polarized tunneling microscopy (SP-STM) is a powerful tool to investigate surface magnetism on the atomic scale, providing a fascinating insight to the world at the transition from classical to quantum physics ····· 10361192504
····· lezzter Preis 15.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Das Ziel dieser Arbeit war die systematische Untersuchung der optischen und kristallographischen Eigenschaften der Uranmonochalcogenide und verdünntem Uransulfid unter hohen Drücken, um den Einfluss des Drucks und der chemischen Verdünnung auf den Lokalisierungsgrad der 5f-Elektronen zu bestimmen. Die Messungen der Kristallstruktur an US, USe und UTe und an den verdünnten Mischkristallen U0,8La0,2S, U0,4La0,6S und LaS zeigen sehr gute Übereinstimmung mit den Literaturwerten. Auch bei der Bestimmung der Phasenübergänge und der Kompressionsmoduln sind im Rahmen der Messungenauigkeiten gute Übereinstimmungen erreicht worden. Für US konnte ein Phasenübergang bei ~70 GPa identifiziert werden, ein Übergang in die bcc-Struktur kann dabei ausgeschlossen werden. Allein für USe wurde mit 79 GPa ein etwas höherer Kompressionsmodul bestimmt, der aber näher an den theoretischen Vorhersagen liegt. Für den Kompressionsmodul von U0,4La0,6S ist eine erhebliche Abweichung vom erwarteten linearen Verhalten bezüglich der Urankonzentration festgestellt worden. Bei den optischen Messungen unter Druck in der Reihe der Uranmonochalcogenide zeigt sich eine starke Zunahme der Lokalisierung vom US hin zum UTe. Diese Lokalisierung kann durch das Anlegen von Druck und die dadurch bedingte Verringerung der Gitterkonstante teilweise wieder aufgehoben werden. Bei einem Übergang in die kubisch raumzentrierte Kristallstruktur zeigen USe und UTe jeweils ein vollständig itinerantes Verhalten, was durch die jeweils stark verbreiterten 5f-Bänder des Urans erklärt werden kann. Die Plasmafrequenz, die in der Reihe der Monochalcogenide vom US zum UTe hin stark abfällt, kann durch das Anlegen von Druck wieder leicht erhöht werden, was mit einem Anstieg der Ladungsträgerkonzentration einhergeht. Beim Phasenübergang in die bcc-Phase nimmt diese für das USe und UTe jedoch schlagartig ab. Die Dämpfung der freien Elektronen bleibt für alle Monochalcogenide in der fcc-Phase nahezu unverändert, auch hier ist eine starke Veränderung nur durch den Phasenübergang zu verzeichnen, der beim USe und UTe einen Abfall um den Faktor 5 bzw. 6 bewirkt. Allgemein kann mit steigendem Druck ein zunehmend metallisches Verhalten beobachtet werden. Die Anpassungsrechnungen legen neben den stark gedämpften f-artigen Elektronen auch das Auftreten von schwach gedämpften d-artigen Elektronen bei niedrigen Drücken nahe. ····· 10361158369
····· lezzter Preis 25.65€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Die Erzeugung von ultrakurzen Lichtimpulsen im Piko- und Femtosekunden-Bereich eröffnet viele Anwendungsmöglichkeiten bei der Untersuchung von extrem schnellen Prozessen in der Biologie, Physik und Chemie. Von besonderem Interesse ist hier der sichtbare Spektralbereich, in dem viele organische Stoffe Absorptionsmaxima zeigen. Aufgrund der begrenzten Abstimmbarkeit der Emissionswellenlänge typischer Lasermaterialien im Infrarot-Bereich stehen auch nach der Frequenz-verdopplung in den sichtbaren Spektralbereich für viele Anwendungen keine geeigneten Strahlquellen zur Verfügung. Ziel dieser Arbeit war deshalb die Entwicklung und Charakterisierung neuartiger Ultrakurzpuls-Strahlquellen, die eine Erschließung neuer Wellenlängenbereiche ermöglichen. Dazu wurde zum einen eine Ultrakurzpuls-Strahlquelle hoher mittlerer Leistung, basierend auf dem Lasermaterial Yb:YAG, bei einer Wellenlänge von 1030 nm entwickelt. Zum anderen wurde, basierend auf dem physikalischen Effekt der stimulierten Raman-Streuung, ein neuartiges Konzept zur Erzeugung von ultrakurzen Lichtimpulsen bei neuen Wellenlänge demonstriert. Die Realisierung des Yb:YAG Lasers war erst durch die Untersuchung und numerische Modellierung der physikalischen Eigenschaften des Lasermaterials möglich, da in Hochleistungssystemen aufgrund des Quantendefekts große Wärmemengen im Laserkristall deponiert werden. Die daraus resultierenden Effekte, wie spannungsinduzierte Doppelbrechung oder das Ausbilden von starken thermischen Linsen, steigern mit zunehmender Pumpleistung die Anforderungen an das Resonatordesign und die Pumpanordnung. Im kontinuierlichen Betrieb emittierte der Laser, bei einer absorbierten Pumpleistung von 84 W, eine maximale Ausgangsleistung von 30 W in einem nahezu beugungsbegrenzten Strahl (M2 ····· 10361169679
····· lezzter Preis 26.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La termodinámica es la ciencia de la energía y presenta una gran importancia en el diseño de motores de automóviles, turbinas de gas, turbinas de vapor, y todos aquellos dispositivos que funcionan a través de ciclos de potencia y de refrigeración. Es por esta razón que ha sido parte esencial de los pensum de estudios de las carreras de ingeniería en todo el mundo. En este texto se muestra una aplicación de esta ciencia en el análisis de las máquinas térmicas y se estudian las variables físicas que permitan optimizar el rendimiento y la potencia de estos dispositivos. Se hace énfasis en aspectos tales como la influencia de las temperaturas, relaciones de compresión, relaciones de presión,relación de cierre de admisión, los cambios en la relación de trabajo de retroceso y su relevancia en el mejoramiento y optimización de las máquinas de ignición y de los motores de turbinas a gas. ····· 1036123860
····· lezzter Preis 26.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El los últimos años se ha trabajado en el control de la calidad de combustibles líquidos y lubricantes, amén de las amplias aplicaciones que estos tienen en la Agricultura, el Transporte y la Biotecnología. La tensión superficial brinda información acerca de los mecanismos moleculares que ocurren en los combustibles líquidos y de la eficiencia del proceso de combustión. En este trabajo se desarrolla un método experimental para determinar la tensión superficial con precisión y exactitud en combustibles líquidos, específicamente en las mezclas de alcohol gasolina haciendo una caracterización molecular de las mismas, usando el tensiómetro DuNouy. El tensiómetro es conectado a un sensor de fuerza, se considera la sensibilidad del sensor B, se obtiene F. Se mide el diámetro interior y exterior del anillo. Se presentan las mediciones de la tensión superficial, se determina la fuerza y el coeficiente de tensión superficial en gasolina, alcohol y mezclas de dichos compuestos, usando un software en Mathcad 14, se da una explicación de los procesos intermoleculares que ocurren. Los resultados demuestran la precisión y exactitud de la técnica de medición desarrollada. ····· 1036122967
für 26.80€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Infrarot-Thermografie ist ein Baustein aus dem Werkzeugkasten der zerstörungsfreien Werkstoffprüfung. Die berührungslose bildgebende Temperaturmessmethode ermöglicht die zuverlässige Ortung und Quantifizierung thermischer Auffälligkeiten eines Meßobjekts. Der besondere Vorteil ist dabei, daß dies bei laufendem Betrieb einer Anlage passieren kann. Die IR-Thermografie ist somit eine unverzichtbare Inspektionshilfe und leistet einen wichtigen Beitrag zur Früherkennung von Schäden.Voraussetzung ist allerdings eine professionelle Beherrschung der Technik. Die physikalischen Grundlagen stammen dabei von den Physikern Herschel, Planck, Stefan, Boltzmann und Wien. Ihre Entdeckungen und Gesetze ermöglichen es, die thermischen Eigenschaften eines Körpers, der eine über dem absoluten Nullpunkt (-273 °C) liegende Temperatur hat, sichtbar zu machen. Im Unterschied zu anderen bildgebenden Verfahren (z.B. Röntgen- oder Ultraschall) können allerdings mit der in diesem Buch beschriebenen passiven Thermografie nur Oberflächeneigenschaften (Temperaturen) detektiert werden. Zum Inhalt des Buches gehört deshalb auch eine Besprechung einiger grundlegender Begriffe der Thermodynamik. Um die Funktionsweise einer Thermokamera zu verstehen, ist aber ebenso ein Ausflug in die Optik nötig. Der größte Teil widmet sich der speziellen Gerätetechnik einer IR-Kamera. Was hat es mit dem Emissionsgrad auf sich Was ist eine Umgebungsstrahlungstemperatur Welchen Einfluß haben Level und Span auf die Aussage eines Thermogrammes Sehe ich einen wirklichen `hotspot` oder nur die reflektierte Temperatur eines Körpers Was sollte ein korrekter Bericht enthalten, den Sie ihrem Auftraggeber überreichen Ein Hinweis auf die in Deutschland verfügbare Literatur und die wichtigsten Vorschriften zum Schluß. ····· 10361107469
····· lezzter Preis 29.99€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Hermann von Helmholtz wurde bereits zu Lebzeiten als Genie gehandelt. Der Universalgelehrte studierte nahezu alle Naturwissenschaften und erlangte bahnbrechende Erfolge in Medizin, Physik und Physiologie. Mathematisch ausgearbeitete Untersuchungen über Naturphänomene machten ihn außerdem zum Mitbegründer der modernen Meteorologie. Im Laufe seines akademischen Werdeganges wurde Helmholtz mehrfach als Professor berufen und 1883 schließlich in den Adelsstand erhoben.Eine seiner späten Leistungen und gleichzeitig das Herzstück dieser Sammlung sind die drei Abhandlungen über die Thermodynamik chemischer Vorgänge . Fächerübergreifend wendet der Reichskanzler der Physik die Gesetze der Thermodynamik auf die Elektrochemie an und führt damit den Begriff der Freien Energie ein. ····· 1036174899
····· lezzter Preis 34.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Die große Herausforderung bei der Analyse von Bragg-Beugungsprofilen zu Charakterisierung der Mikrostruktur und des Verformungsverhaltens von plastisch verformten kfz Metallen besteht in der geeigneten Anpassung der Auswertealgorithmen an die Gegebenheiten der Realstruktur. Das vorgeschlagene Konzept zur Beugungsprofilanalyse trägt der verformungsinduzierten heterogenen Versetzungsanordnung auf unterschiedlichen Maßstabsskalen Rechnung und kann auf Untersuchungen vom Einkristall bis zum nanokristallinen Vielkristall (mittlere Korngröße =100nm) angewendet werden. Der erreichte Fortschritt besteht speziell in der voneinander unabhängigen Bestimmung von weitreichenden Eigenspannungen auf makroskopischem, kristallinem und mesoskopischem Strukturniveau, von `lokalen` Versetzungsdichten auf einem mesoskopischen Strukturniveau sowie von Charakteristika des Korngefüges.Dieses Konzept wurde auf hochaufgelöst gemessene Bragg-Beugungsprofile angewendet, die nach einsinniger und zyklischer plastischer Verformung in einem weiten Temperaturbereich an Nickel-Ein- und Vielkristallen gemessen wurden. Dabei gelangen der experimentelle Nachweis und die quantitative Bestimmung von Spektren weitreichender Eigenspannungen auf unterschiedlichen Strukturniveaus, die Ausdruck einer inhomogenen plastischen Verformung sind, sowie die Aufdeckung von Zusammenhängen zwischen lokaler Spannung, lokaler Versetzungsdichte und geometrischen Strukturparametern der Versetzungsanordnung. Darüber hinaus konnten Einsichten über den Einfluss der Korngröße auf die Entwicklung der Mikrostruktur und auf die dominierenden Verformungsmechanismen bei einsinniger und zyklischer plastischer Verformung in kfz Metallen gewonnen werden. ····· 10361169726
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En este trabajo se estudiaron teóricamente los procesos de transferencia de calor, análisis termodinámico y caída de presión que ocurren en el regenerador de un motor Stirling tipo gama. Del análisis teórico de estos procesos se desarrolló una metodología de cálculo con la que se obtuvieron resultados de eficiencia de estas máquinas, los cuales fueron evaluados y comparados con los resultados experimentales de otros autores, con el fin de validar dicha metodología. Los resultados obtenidos muestran que la selección de mallas regenerativas de los motores Stirling está relacionada con su calibre y densidad. Sin embargo a pesar de que las mallas con mayor densidad incrementan la eficiencia térmica del regenerador, no necesariamente son más recomendables, debido a que se incrementa la caída de presión al momento de la operación del motor Stirling. Finalmente, al introducir un regenerador con una alta eficiencia en un motor Stirling, la eficiencia térmica del motor también se incrementa, sin embargo la potencia que entrega el motor es la misma. Esto indica que el regenerador puede ayudar en economizar la energía térmica, más no es un medio para incrementar la potencia de los motores. ····· 10361137345
für 35.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work contributes to the development of pyroprocessing technology as an economically viable means of separating used nuclear fuel from fission products and cladding materials. Electrolytic oxide reduction is used as a head-end step before electrorefining to reduce oxide fuel to metallic form. The electrolytic medium used in this technique is molten LiCl-Li2O. Groups I and II fission products, such as cesium (Cs) and strontium (Sr), have been shown to partition from the fuel into the molten LiCl-Li2O. Various approaches of separating these fission products from the salt have been investigated by different research groups. One promising approach is based on a layer crystallization method studied at the Korea Atomic Energy Research Institute (KAERI). This research explores economical and scalable operating parameters based on a comprehensive understanding of heat and mass transfer through a series of experiments in which LiCl is purified, by concentrating CsCl in a liquid phase as purified LiCl is crystallized and removed via an argon-cooled cold finger. ····· 10361830
für 36.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Mit dem vorliegenden Werk liefert Julius Ritter von Hauer eine systematische Zusammenstellung der zur Ventilation in Gruben benutzten mechanischen Vorrichtungen. Er geht auf Konstruktionsregeln ein und gibt einen Überblick über die zweckmäßigsten Ventilationsmaschinen.Sorgfältig bearbeiteter Nachdruck der Originalausgabe von 1870. ····· 10361138954
für 38.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Aufbauend zu einem von ihm gehaltenen Vortrag zur Bedeutung des zweiten Hauptsatzes der Thermodynamik für die Theorie des Fiebers legt Emil Simonson nun die folgende Abhandlung vor, in der er sich weiter mit diesem Thema auseinandersetzt, Theorien entwickelt und diese diskutiert. Sorgfältig bearbeiteter Nachdruck der Originalausgabe von 1912. ····· 10361138997
für 39.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Ehe ich nicht durch anderweitige Versuche widerlegt worden bin, muß ich es als erwiesen betrachten, dass wir es bei meinen Versuchen mit dem flüssigen Zustand des reinen Kohlenstoffs zu tun haben. Gedacht als simples Schlusswort eines Vortrages, entbrennt an dieser Aussage Otto Lummers seinerzeit eine hitzig geführte Diskussion, die auch vor der Diamantindustrie nicht Halt macht, da eine künstliche Herstellung von Diamanten einer Revolution der Branche gleich käme. Schließlich sieht sich der Autor gezwungen, das hier vorliegende Werk zu nutzen, um Klarheit über seine Forschungen zu schaffen und Stellung zu beziehen. Untermauert wird das Ganze durch eine Zusammenfassung der bis dato bekannten Geschichte des Kohlenstoffs. Qualitativ hochwertiger und bearbeiteter Nachdruck der Originalausgabe von 1914. ····· 10361138932
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Modern alloys appear and develop as complex multi- component systems with the aim of accomplishing demands of metallurgical engineering, material science and industry. Nowadays, many commercial software systems can be found in the market to perform complicated calculations, in order to obtain thermodynamic properties of materials. This work reviews the algorithms, procedures, formulations and calculations behind the most common approach used in computational thermochemistry, CALPHAD (CALculation of PHAse Diagrams). ····· 10361113584
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The concept of friction in general, and the problem of stick-slip motion in particular, at microscopic length scales, are central to many areas, from friction and lubrication of materials to earthquake models and avalanches. The interest in this problem comes from the large range of physical applications that are related to it: computer disk, miniature motors, and many aerospace components. This book, therefore, provides a study of friction and stick-slip phenomena in some nonlinear models that contain nonlinear spring and deformable nonsinusoidal substrate potential, such as Remoissenet-Peyrard potential. We also provide a quite thorough description of the feature of the mechanism of frictional phenomena. We show that the critical velocities which provide the transition between stick-slip, intermittent and sliding motions depend on the shape of the contact surfaces, as well as the nonlinear parameter of the spring. This shape also affects the static friction. This analysis should help in dealing with complex situations and stimulate further experimental studies of friction and stick-slip phenomena in the deformable systems. ····· 10361113863
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The improvement of the cast part quality, both as far as the geometric precision and mechanical properties are concerned, is an important desiderate for researchers. There is a twofold aim: on the one hand, the reduction of the costs related to the cast part mechanical machining (in order to do this, the dimensional errors of the cast parts should be reduced to diminish the machining allowance with the machining processes) and, on the other hand, a high level of the cast part strength during functioning, by obtaining a proper crystalline structure during melt material solidification/cooling. This domain mainly refers to the relation between the melt material solidification/cooling process and the cast part dimensions and crystalline microstructure. The present approach of the domain has two aspects: on the one hand, the modeling of the melt material solidification/cooling process in order to establish and programme the optimal thermal field dynamics and, on the other hand, the control of the thermal field evolution depending on its programmed dynamics. ····· 10361113907
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Province of North Sulawesi in Indonesia is estimated to have geothermal energy as much as 865 MWe. One of the geothermal fields in North Sulawesi is located in Lahendong, which contains potential energy about 530 MW (Pertamina Geothermal Energy 2009). Currently, Lahendong geothermal field is being developed by Pertamina Geothermal Energy (PGE), a subsidiary of PT Pertamina, the state-owned oil and gas company of Indonesia. Two geothermal power stations have been operated with installed capacity of 20 MW each (Unit 1 and Unit 2) in that geothermal field. There is also a 20 MW power station (Unit 3) that has been undergoing operational testing since April 2009. This book assesses the gross electrical power that can be generated from the production wells in the Lahendong geothermal field. ····· 10361114831
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Heat exchangers play a vital role in almost all fields of industry ranging from condensers and evaporators in refrigerating units to radiators of automobiles . The strive for obtaining better energy efficiency and cost savings has made the industry to constantly upgrade the technology associated with heat exchangers to improve their heat transfer efficency , reduce the size and also to lower production costs .This has resulted in research into various tube shapes used in heat exchagers including wing-shaped tubes that can improve the heat exchange efficiency .A study was carried out to compare the performance of heat exchangers with staggered banks of tubes with wing-shaped cross sections and cylindrical tubes under turbulent flow conditions. Detailed 2D- numerical simulations of fluid flow and heat transfer were performed for various pitch to diameter ratios using Computational Fluid Dynamics . When compared to the normal cylindrical tubes better heat exchange was observed in wing-shaped tubes which could be due to more attached flow happening in this case due to the wing-shape. ····· 10361115272
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Current research deals with numerical simulation of two-phase turbulent flows (gas and solid particles), which appear in Circulating Fluidized Bed (CFB) boilers, combusting Estonian local fuel - oil-shale. Many thermal processes in industry take advantage of the significant fluid-solid contacting in fluidized beds to carry out fluid-solid reactions, eterogeneous catalysis and particle drying. Gas-solid fluidization process in circulating fluidized beds is widely applied in many industries. The scientific novelty of the thesis is a gas-solid particle turbulent flow numerical simulation, taking in the advance the real initial data of CFB power plants using Estonian oil-shale ash. The results of the simulation describe the behaviour of oil-shale ash particles in CFB, which could be helpful in improving the efficiency of the combustion process. ····· 10361116094
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Membrane Separation Technology has added a new dimension in modern separation technology. The recent novel development in membrane processes have made it possible to use various different purposes at eco-nomical rates with additional flexibility and improved efficiencies. Feed spacers can provide higher shear rates at the membrane surface, which, promote the mixing between the bulk of the fluid and the fluid ele-ment adjacent to the membrane surface. As a result concentration polarization and membrane fouling can be reduced. The present work is devoted to investigate the hydrodynamics in two dimensional spacer filled channels. Three different configurations of the cylindrical spacers are investigated with different channel Reynolds number and different meshlength. Different size and shape of formation of recirculation region, upstream and downstream of the spacers are closely observed. This recirculation regions have an important role in enhancing the mass transfer in the reattachment region. ····· 10361119389
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In enclosed spaces, the combined treatment of the air to control, as specified, temperature, relative humidity, velocity of motion, and radiant heat energy level, with consideration of the need for removal of air-borne particles and contaminant gases.Heating Ventilating and Air conditioning (HVAC) System is capable of providing heating humidification during the winter, cooling and dehumidification during summer, the supply of fresh air through out the year and capability to furnish each of these services in a controlled manner and when sought by building occupants.Plumbing is a system of piping, apparatus, and fixtures for water distribution and waste disposal within a building. This chapter covers the basic water supply and water distribution systems, the theater of operations (TO) water supply and water distribution systems, and the sewerage system. Plumbing also includes the installation and maintenance of these systems. When architects design a building, they prepare a set of prints and a set of specification sheets detailing the types and quality of materials to be used. Plumbers use the prints and specifications to layout and plan the project. ····· 10361132104
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Generation of large scale power from coal is an economic option. This is specifically true for countries like India having large coal reserves. However, adverse effect on the environment in this process is presently under critical scrutiny. Generating power efficiently from coal in an environmentally benign way is of prime importance. Clean coal technologies are the outcome of this effort. In this work a few advanced clean coal technology based power generation options has been conceptualized. Thermodynamic modeling for these schemes has been developed. Both energy and exergy analyses have been carried out using developed models to estimate the performance of schemes to find optimum solutions, if any ····· 10361132650
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book reviews the subject of Si quantum dots embedded in dielectric andits application to the realization of non volatile semiconductor memories and optoelectronicdevices, this dialing various approaches for the analysis of the materialsthrough transmission electron microscopy (TEM). The advantages coming froman innovative application of energy filtered TEM (EFETM) are put in clear evidence. Themanuscript then focuses on the synthesis of the materials: three different methodologiesfor the realization of the dots based on chemical vapor deposition (CVD)and ion implantation are described in detail, and physical models providing someunderstanding of the observed phenomenology are reported as well. ····· 10361133204
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Exergy analysis has been performed for identifying the causes, locations, and magnitudes of process inefficiencies for the COREX process. A composite model of the COREX process (i.e., models for the smelter gasifier and the reduction shaft) using FactSage 6.2 (Thermfact/CRCT, Montreal, Canada, and GTT Technologies, Aachen, Germany) is used to generate stream data for exergy computation. The effect of use of methane as an auxiliary fuel and high ash coal in smelter-gasifier has been investigated through the model. A new methodology for the calculation of exergy of the process streams using the database in FactSage is proposed in this work. The exergy loss/destruction (measure of the thermodynamic irreversibility) and exergy efficiencies of the COREX process are evaluated at various coal rates and compared with those of the blast furnace. Operating the COREX process is theoretically feasible at lower coal rates with higher exergy efficiencies when lesser export gas is generated. ····· 10361134209
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book, our objective is to design and optimize Plate and Frame heat exchanger. The plate and frame heat exchanger was originally introduced in the 1930s and is used extensively in the oil industries . Plate and frame heat exchangers consist of several metal sheets with corrugated surfaces that are clamped together .The irreversibility of any heat exchanger is due to two factors The transfer of heat across the stream-to-stream temperature difference and the frictional pressure drop that accompanies the circulation of fluid through the apparatus. The fluid friction and heat transfer irreversibility can systematically be reduced by showing down the movement of fluid through the heat exchanger. In other words, optimization process is synonymous with employing larger heat exchanger, where there is more heat transfer area and less heat exchanger volume. Hence, after designing a heat exchanger the optimization process is a key stage due to economical considerations. ····· 10361147005
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This Book is describing the way the 2D Fluid Mechanics Solver can be created with use of Object Oriented Programming. In this book You will find practical knowledge about Object Oriented Programming Its advantages and disadvantages and how C++ language can be used for science oriented projects. Moreover there are explained and described source code examples that are responsible for space discretization and solution of Convection-Diffusion and Euler Equations. ····· 10361147270
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The interactions of water with the various functional groups of proteins play crucial role in determining the conformational stability of proteins. The interactions between charged biomolecules and ions can highly influence the behavior and conformation of former molecules in aqueous solutions and study of these interactions do provide an insight into their conformational stability and unfolding behavior. As the amino acids in vivo are not involved in pure aqueous medium, their studies in the presence of various electrolytes, non-electrolytes, zwitterions i.e. molecules of various sizes, shapes and characteristics, like polarity and hydrophobicity are much in place. Partial molar quantities and the transfer functions determined at infinite dilution are extremely useful in the elucidation of mutual interactions between amino acid and cosolute/cosolvent molecules. ····· 1036119388
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Calcium Sulfate (CaSO4) deposit reduces heat exchange in heat transfer equipment which adversely affects the equipment performance and plant production. This experimental study was conducted by using the Rotating Cylinder Electrode (RCE) equipment available in the university s Center for Engineering Research (CER/RI) to study and compare the effect of solution hydrodynamics on Calcium Sulfate (CaSO4) scale deposition on coated carbon steel and titanium surfaces. In addition, the Scanning Electron Microscopic was used to examine the morphology and distribution of Calcium Sulfate (CaSO4) crystals deposited on titanium metal surfaces. In this study, the rotational speed was varied from 100 to 2000 RPM to study the behavior of Calcium Sulfate (CaSO4) accumulation on both materials. Based on the experimental results, Calcium Sulfate (CaSO4) scale obtained in the present study was almost constant on coated carbon steel in which the rate of scale deposition is equal to the rate of scale removal. However, the deposition of Calcium Sulfate (CaSO4) observed on titanium material was increased as the speed increased. ····· 1036119283
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Work deals with the study of processes that attend the electric arc extinction inside the quenching chamber of a circuit breaker. It is focused on several areas. The first one is concerned to fluid dynamics calculations (CFD) and the second one is aimed at thermal field calculations. In this work effects of metal plates distance together with metal plates shapes are described from aerodynamical point of view. Another objective solved by this work is to give information about influence of an electric arc position in a quenching chamber, which changed its shape due to forces acting on it during extinction process. For purpose of this work a new software solution for CFD was developed. Whole software concept is based on plug-ins. Due to this solution, the softwares calculation core can be used for other numerical analyses, like structural, electromagnetic, etc. The only requirement is to write a plug-in for these analyses. Because the software is designed as multi-threaded application, it can use the fully performance of current multi-core processors. ····· 1036187951
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Asphaltene precipitation is a sophisticated issue in the upstream oil industry, worldwide, and has detrimental effect on a verity of production processes in oilfields it damages the properties of the reservoir and causes an unfavorable and significant decrease in oil production. Many oil reservoirs encounter asphaltene precipitation as a major problem during natural production. It is desirable to predict and investigate the precipitation behavior of asphaltene in different pressure temperature conditions. In spite of numerous studies to predict asphaltene behavior, the effect of temperature on asphaltene precipitation during pressure depletion at reservoir conditions is still obscure in the literature. In this work the PVT data as well as experimental data of asphaltene precipitation at reservoir conditions of two Iranian heavy and light oil samples are used, and the asphaltene precipitation and deposition envelops (APE and ADE) of the oils are developed. ····· 1036125411
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Microsoft Excel spreadsheet add-ins for the R152a data and the psychrometric data, at any barometric pressure and in the air-conditioning and drying temperature ranges, were developed using appropriate governing equations. They were then used to simulate and analyse refrigerating, air-conditioning and drying processes in the Microsoft Excel environment by exploiting its automatic computation potentials. The packages allow one to determine the thermodynamic properties of R152a and humid air at any desired state, and to simulate and analyse refrigeration, air-conditioning and as well as drying processes. This, as a teaching tool, evokes the intellectual curiosity of students and enhances their interest and ability in the thermodynamics of R152a and humid-air processes. The developed Excel add-ins are also useful to the practising HVAC design engineer. ····· 1036124566
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The field of chaotic dynamics has grown highly nonlinearly in the past few decades. Major progress occurred in traditional areas such as bifurcations, crises, basin boundaries, strengthening the mathematical foundations. New topics such as control and synchronization of chaos have emerged, addressing more practical questions. This book has a bit of both, addressing the initiates in low-dimensional chaos, from graduate students to researchers. First, we discuss the topic of phase synchronization of chaos. This phenomenon results from weak interactions between dynamical systems and found applications to neuroscience and communications. Here we focus on a competition phenomenon that occurs between signals in phase synchronization of a chaotic attractor. Second, we discuss the topic of indeterminate bifurcations. We study systems undergoing adiabatic drift that destroys an attracting periodic orbit through a saddle-node bifurcation placed on a fractal basin boundary. The fate of the system following the pre-bifurcation orbit is indeterminate it is impossible to predict its final state past the bifurcation. We address this indeterminacy numerically and analytically. ····· 10361100844
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Two major industrial/environmental disasters occurred in 2010. Firstly, on 20 April an oil rig belonging to BP blew up in the Gulf of Mexico, releasing daily, about 10 million liters of crude oil in the ocean. Secondly, on 4 October a dam retaining waste materials of a factory producing aluminium in Hungary suddenly collapsed, releasing more than one million cubic meters of toxic red mud. It is obvious that the final impact of these two disasters (yet to come) will be tragic. Meanwhile, one lesson that can be learnt from them is that a failure in a given process can lead to a major environmental disaster. So, process and environment can sometimes be strongly associated. This paper was written on that basic assumption, by revisiting dam-break flows, gravity currents and core flows of complex fluids. ····· 10361101422
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This experimental work was done to measure the thermal conductivity of nanofluids (TiO2-water, ZnO-water and Al2O3-water). The thermal conductivity is measured experimentally, compared with the theoretical models for each nanofluid at each particle volume fraction. The unmatched hike is obtained in the thermal conductivity through nanofluid. To perform the experiment the nanofluid is prepared at different volume fractions of 0.25%, 0.50%, 0.75% and 1% of TiO2, ZnO and Al2O3 nanoparticles with base fluid water. The nano particles are mixed with water in ultrasonic vibration mixer (UVM) machine. The mixing of nano particles is done through ultrasonication. The measurements are taken at room temperature with the help of Thermal property analyzer KD2 Pro device which is most accurate device to measure the thermal properties of the liquids as well solids. The results of this experimental work shows that thermal conductivity increases 22% for TiO2 nanofluid, 17% for ZnO nanofluid and 24% for Al2O3 nanofluid with base fluid water for 1% volume fraction of nanofluid. ····· 1036121511
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book investigates the nonlinear behavior of circular plates under different types of loadings and physical fields, namely, thermal, electrostatic, and mechanical. The approaches used were perturbation and numerical techniques applied on different applications ranging from aerospace to micro-electro-mechanical systems (MEMS). The book should be of value to R&D engineers, researchers, and postgraduate students in Engineering and physics as well. ····· 10361102483
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This thesis is devoted to the creation of a rheometer based on the boundary value problem of the two eccentric cylinders. This device is the first one after the cone-and-plate rheometer which is able to determine more material constants other than the viscosity. However, the eccentric cylinder rheometer shows to be one of the future instruments which is capable to further developments without the difficulties due to the effect of inertia encountered in the cone-and-plate rheometer. The preliminary results obtained by this apparatus proved to be sufficient for the determination of the viscosity coefficient and the second order coefficient over a range of shearing which overcomes the range covered by the cone-and-plate. Further investigation are required which is expected to allow the determination of other material constants. The theoretical basis of the present problem is discussed in details [1, 2], where the fluid performs rotational and axial motions. In the present thesis the rotational part of the motion is considered and the stream function for this motion is determined. ····· 10361102774
für 49.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Chemical recuperation of heat has gained significant interest due to higher magnitude of reaction heat compared to that of the latent heat in conventional (physical) recovery. In particular, two concepts have been identified which engage chemical reactions within the process: Chemical Recuperation of Heat through Fuel Synthesis and Chemical Recuperation of Heat through Reaction Coupling. The first concept uses the recovery of surplus heat by chemically manipulating the fuel through an endothermic reaction. The result is the generation of a secondary fuel within the cycle which can be used to reduce the process primary fuel consumption and thus increase the overall efficiency. Based on the second concept, one can temporally store the heat using a pair of endothermic/exothermic reactions for later release to system or continuous upgrade of the heat temperature level. It is of interest if the chemical recuperation of heat can be realized through integration of the two concepts. The inclusion of chemical reactions for recuperation of heat will form the next phase in the heat recovery sector as it offers the possibility of extracting a vast remnant of waste heats. ····· 1036186532
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Monografiya, posvyashchena teoreticheskomu obosnovaniyu raboty viskozimetrov osnovannykh na vynuzhdennoe dvizhenie issleduemogo veshchestva cherez izmeritel`nyy kanal.Rassmatrivaetsya metod padayushchego gruza, metod s padayushchim polym tsilindrom,metod vynuzhdennogo dvizhenie gruza i metod kapillyara. Resheno gidrodinamicheskikh zadach, postavlennykh v obshchey forme, kotorye vstrechayutsya v rabote viskozimetra. Sushchnost` metoda reshenie zaklyuchaetsya v tom, chto pervonachal`no poluchaetsya uproshchyennoe raschyetnoe uravnenie metoda i na ego osnove osushchestvlyaetsya vydelenie osnovnykh i vtorostepennykh faktorov. Dalee, s uchyetom etogo poluchaetsya bolee utochnyennoe raschyetnoe uravnenie metoda i razrabatyvaetsya rekomendatsiya o podbore parametrov pribora. Kniga rasschitana dlya nauchnykh rabotnikov, takzhe mozhet byt` poleznym dlya studentov vuzov ····· 103615266
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book aims to give a clear and coherent understanding of the excitation mechanisms which excite cables in structures. A static and dynamic analysis is undertaken to investigate the behaviour of cables. A comprehensive theory is given for the free, linear vibrations of the suspended cable. Using this theory, a finite element model of several cable-stayed bridges are constructed with various cable configurations in a 2-D and 3-D environment. The effect of increasing the horizontal tension in the cables is analysed and the natural frequencies are compared. Design recommendations and mitigation methods are compared with international building codes. This book provides a extensive introduction into dynamics of cables and a must have guide for bridge engineers. ····· 10361114990
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book, an analytical method for on-line determination of absorptance and emittance of materials is discussed. It uses data from sample heating and cooling histories obtained from an absorption calorimeter. The calorimeter is a box chamber having a window, sample holder, tungsten halogen lamp and a microcomputer with instrument interface to control the opening and closing of the shutter window. It is automated with a Z80 microprocessor system that acquires data from the sample through thermocouples, filters, amplifiers and analogue-to-digital converters for temporary storage in an on-board RAM. Analytical solutions of heat balance equations of the calorimeter are computed for the data using numerical methods. Newton`s iteration procedure for systems of nonlinear equations is used with the assumption that the thermophysical properties are constant in the temperature range considered. The IBM PS/2 model 50z microcomputer has been employed to process the data and display the results. The book can be used by students, researchers and workers in various fields to model low temperature thermal processes like in solar Photothermal applications. ····· 10361115040
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In many cases the decentralisation of the markets lead to an increased price of energy due to a higher number of companies created between the producers and consumers. This phenomenon tends to tighten the competition and increases the pressure on all the market actors. Under these circumstances a simple economical analysis is in many cases unsatisfactory since the competitiveness of one producer on an energy market is also influenced by other factors such as: fuels price variation, tariffs applied by transport operators and energy providers, introduction of eco- taxes, etc. The proposed analysis method is based on a comparison between the analysed cogeneration system and different alternative solutions, in terms of end consumer`s prices. The proposed mathematical model allows the evaluation of the state of the analysed cogeneration system, as well as the effect of several rehabilitation methods. ····· 10361115113
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The main objective of the work presented in this book is to improve the control structure for the new Wheelchair Mounted Robotic Arm (WMRA) to include new algorithms for optimized task execution that is, making the WMRA a modular task oriented mobile manipulator. The main criterion to be optimized is the fashion in which the wheelchair approaches a final target as well as the starting and final orientation of the wheelchair. This is a novel approach in non-holonomic wheeled manipulators that will help in autonomously executing complex activities of daily living (ADL) tasks. The WMRA is a 9 DoF system, which provides 3 degrees of kinematic redundancy. A single control structure is used to control the WMRA system, which gives much more flexibility to the system. The combination of mobility and manipulation expands the workspace opening a broad field of applications: from maintenance and storage to rehabilitation robotics. This structure is based on optimization algorithms that can resolve redundancy based on several subtasks: maximizing the manipulability measure, minimizing the joint velocities (hence minimizing the energy), and avoiding joint limits. ····· 10361115626
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El presente proyecto de grado surge con la necesidad de producir hielo, destinado a la industria alimentaria, como consecuencia se plantea dos posibles soluciones: el sistema de refrigeración por absorción y el sistema de refrigeración por compresión de vapor. El sistema de refrigeración por absorción, considerado como no tradicional, utiliza como fuente de energía primaria el calor (gas natural). El sistema de refrigeración por compresión de vapor tiene como fuente de energía la electricidad. El sistema mas conveniente, será elegido, a través de una evaluación técnica-económica, para lo cual se desarrollaron los fundamentos teóricos de los dos sistemas, con el fin de dar a conocer el funcionamiento y aplicación de ambas tecnologías. ····· 10361137365
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray the simulation of the impact response of viscoelastic bodies is developed by computational finite element model. The variational method is developed to drive the equations of motion. The Lagrange multiplier method is exploited to impose the nonholmonic contact constraints and convert the problem form constraint problem to unconstraint one. The constitutive equations are expressed in integral form and involving relaxation moduli are adopted to describe the nonaging simple material. Generalized Standard Linear Solid (Wiechert) model is adopted to simulate the internal damping (viscoelastic) behavior of the structure is exploited in order to drive a recursive relationship and thereby eliminate storage problem. Newmark constant average acceleration scheme is proposed to integrate the governing equation numerically and transfer the problem into a static one for each time increment ····· 10361118448
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El rápido crecimiento industrial en aras de satisfacer las necesidades humanas condujo a la instalación de grandes y complejos sistemas energéticos, que en la actualidad se presentan como los principales medios de contaminación del medio ambiente, debido a las formas desmedidas del consumo de energía. Actualmente, el hombre enfrenta grandes retos en la búsqueda de sistemas de transformación de la energía en forma más eficiente y racional, situación que lo ha obligado a enfocar su atención en el uso de las energías alternativas. En esta obra se presentan los resultados de un trabajo de tesis doctoral, en el cual se presentan algunas de las metodologías del diagnóstico termoeconómico de los sistemas energéticos actuales. Se realiza una comparación entre las principales metodologías del diagnóstico termoeconómico y se aplican sobre un caso práctico de estudio. La aplicación de estas metodologías de diagnóstico permite detectar, cuantificar y valorar económicamente las pérdidas de energía de un sistema energético. ····· 1036189521
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book explains some interesting phenomena in two-phase flow and heat transfer in microchannels. The microchannel technology is an emerging technology that finds many interesting applications in industry and academic research. Miniaturization of scientific and industrial components is the motivation to carry out the microchannel research. Microchannel technology offers many advantages in automotive heat transfer, in microelectronics for removal of high heat fluxes.The research in macro channels have been carried out for a long period now but still two-phase in macro and especially in microchannels is very complicated phenomena. As such the results found for macro scale channels are not directly applicable and can not be extrapolated to micro scale channels. This book gives some insight into main differences between a micro and macro scale channel and some governing phenomena in two-phase flow and heat transfer are highlighted. ····· 10361133910
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Binary suspensions made up of oppositely charged nanoparticles have been shown to self assemble into substitutionally ordered superlattices. The structure of the superlattice depends upon the particle charges as well as the mixture composition. Pressure composition phase diagrams for binary mixtures of equal sized and oppositely charged nanoparticles are constructed for charge ratios ranging from -1 to 0. The effect of charge asymmetry on the formation and stability of the substitutionally ordered solid is clearly demonstrated. ····· 1036199170
····· lezzter Preis 59.95€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Thermodynamik und statistische Physik reichen in ihrer Bedeutung weit über die Physik hinaus und erklären eine schier unerschöpfliche Masse an komplexen Phänomenen unserer Umwelt aus einfachen Grundprinzipien. Auch wenn die historischen Wurzeln der Thermodynamik ganz praktisch in einem besseren Verständnis von Wärmekraftmaschinen von der Dampfmaschine über den Benzinmotor hin zur modernen Gasturbine zu suchen sind, so hat sie die entscheidenden ersten Schritte in die Quantentheorie erlaubt und in den letzten Jahrzehnten tiefe Einblicke in die Physik der schwarzen Löcher als einem Schritt zu einer Theorie der Quantengravitation ermöglicht. Methoden der statistischen Physik sind unverzichtbare Grundlagen der Festkörperphysik, der modernen Biophysik und der Klimaforschung genauso wie auch scheinbar unverwandter Gebiete wie der Finanzmathematik und der Verkehrsforschung. Schroeders in den Vereinigten Staaten populäres Buch Thermal Physics liegt nun zum ersten Mal in deutscher Übersetzung vor. In einer ansprechenden Mischung entwickelt es die Methoden der Thermodynamik und statistischen Physik in einem gemeinsamen Zugang und bespricht alle wichtigen Anwendungen: Gase, Flüssigkeiten, Magnete, Festkörper, Wärmekraftmaschinen, chemische Reaktionen. Dabei werden die Grundlagen ebenso präzise wie anschaulich gelegt und ermöglichen es dem Leser, sich in der mathematisch einfachen, aber konzeptionell subtilen Thermodynamik zurecht zu finden und die wichtigsten Rechen- und Näherungsmethoden der statistischen Physik souverän anzuwenden.Learn a little . . . do a littleBesonders hilfreich ist auch, sich bei Beispielen plastisch vor Augen zu führen, wie sich die Änderung von physikalischen Parametern auf das Verhalten eines Systems auswirkt.Dazu sind ausgewählte Beispiele als digitale Arbeitsblätter ausgearbeitet worden, die Sie einfach mittels eines QR-Scanners auf Ihrem mobilen Gerät (idealerweise ein Tablet) aufrufen und begleitend zur Veranschaulichung benutzen können. Ganz getreu dem Motto Learn a little . . . do al little.
Das Buch richtet sich an Studierende der Naturwissenschaften, insbesondere der Physik. Es ist für Studierende an Universitäten und Fachhochschulen konzipiert und rundet den an sich eher abstrakten Stoff durch eine große Fülle an Aufgaben ab, die die Reichweite von Thermodynamik und statistischer Physik illustrieren. Neben einer Vorlesungsbegleitung eignet sich die Physik der Wärme daher auch hervorragend zum Selbststudium. ····· 10361185224
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In the diesel engine cylinder, the air fuel mixture is not at rest, but is in highly turbulent condition. The turbulence breaks the filament of a flame into a ragged front, thus presenting a far greater area of surface from which hear is being radiated hence its advance is speeded up enormously. The combustion process may be developed in two stages. One the growth and development of a self-propagating nucleus flame and the other the spread of the flame throughout the combustion chamber. The former is a chemical process depending upon the nature of the fuel, temperature and pressure, the proportion of the exhaust gas and also upon the temperature coefficient of the fuel.During the combustion, there is a rise of temperature and pressure due to the combustion of the fuel ignited. Both temperature and pressure combine to accelerate the velocity of the flame front in compressing the unburnt portion of the charge in the Knocking zone. Ultimately the temperature in this zone reaches such a high value feat chemical reaction proceed, at for grater rather than that at which the flame is advancing. Hence we have combustion accompanied by flame, producing a very high rate of pressure rise res ····· 10361132341
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book caters to the needs of the students of undergraduate and postgraduate courses, through effective formulation of mathematical models. This comprehensive text introduces readers to the theory and applications of finite difference technique to arrive at optimal solutions. The neat free-body diagrams are presented and problems are solved systematically to make the procedure clear. It offers finite difference techniques which include Crank-Nicolson implicit finite difference scheme. Each of five chapters includes thorough grounding in the related concepts. In addition, the results and discussions designed to aid further understanding of the subject. ····· 10361119512
····· lezzter Preis 61.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The tombs of the kings in Valley of the Kings, Luxor, are considered to be one of the tourism industry`s bases in Egypt due to their uniqueness all over the world. Hence, they should be preserved from the different factors that might cause harm for their wall paintings. One of these factors is the excessive relative humidity as it increases the bacteria and fungus activity inside the tomb in addition to its effect on the mechanical and physical properties of materials. The current research aims to study the mechanical ventilation systems effect on airflow pattern as well as temperature and relative humidity distribution inside three tombs. The study is carried out using computational fluid dynamics (CFD) simulation using a commercial CFD code, namely FLUENT® version 6.2.16. It was found that the optimum airside system design should allow the air to pass all the enclosure areas before being extracted. Also a restriction should be made for the simultaneous number of visitors for each tomb should be made in order to limit the relative humidity inside any given tomb. ····· 10361100767
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work investigates the flow boiling heat transfer in microchannels with the aim of developing compact cooling systems which can be adapted to miniaturized power components. Nano and micro-surface treatments were used as innovative techniques to improve the heat transfer performance as well as to delay the intermittent dryout. Initially,pool-boiling experiments were performed to highlight the impact of nanocoatings on nucleate-boiling mechanisms. It was observed that the surface wettability modified by nanoparticle deposition had significant effects on the boiling processes. Afterwards, a second experimental campaign was conducted to investigate the flow boiling in a microchannel with nanocoated and microstructured samples. These studies highlighted the impacts of surface wettability and of micro-patterning on two-phase flow patterns, pressure drop and heat transfer coefficient. In particular, significant enhancements in heat transfer coefficient and in intermittent dryout were obtained with micro structured samples. ····· 10361116041
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A complete study of heat conducting viscous flows presents several nonlinearities: the convections, the Joule effect and energy dependent conductivity and viscosities. Adopting the general thermodynamics process, the constitutive relations for the Cauchy stress tensor and the heat flux are nonlinear with p and q coercivity parameters, respectively, when non- Newtonian fluids are taken care of. We investigate what we call the (p-q) coupled fluid-energy system. We deal with the initial and boundary value problems of (p-q) coupled fluid-energy systems under Dirichlet-Newton boundary conditions as well as nonstandard boundary conditions capturing the frictional phenomena and convective/radiative heat transfer behavior on a part of the boundary. The resolution of the proposed coupled systems employs several distinct methods of nonlinear functional analysis: classical theory on calculus of variations duality theory on convex analysis Faedo- Galerkin method Moreau-Yosida regularization argument compactness and monotonicity methods L1- theory on PDE due to the existence of the Joule effect and fixed point arguments for multivalued mappings. ····· 10361114396
····· lezzter Preis 61.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La existencia hoy en día de concentrados de cobre con altos contenidos de arsénico, ha dirigido los problemas de contaminación en la minería, directamente hacia las fundiciones. Con presencia de ambientes oxidantes y altas temperaturas, el arsénico se puede presentar tanto como trióxido de arsénico gaseoso como sulfuro de arsénico gaseoso, dependiendo del potencial de azufre. El presente estudio compromete un análisis exhaustivo para la fijación de arsénico en un ambiente oxidante aislado a altas temperaturas, por medio de mezclas a granel (polvo) de sulfato férrico, sulfato férrico con óxido de calcio y sulfato ferroso con óxido de calcio, para la formación de arsenato férrico (FeAsO4). ····· 1036123915
für 62.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El aprovechamiento de la radiación solar como fuente de energía está limitado por la baja densidad energética de la radiación solar que llega a la Tierra y el elevado grado de irreversibilidad termodinámica de los procesos de su captación. Los procesos de concentración de la luz solar poseen gran relevancia en la actualidad y vinculan esencialmente la óptica con la termodinámica. Por ello el objeto de estudio de este texto es la razón de concentración máxima alcanzable con un concentrador de la luz solar, análisis que conduce al concepto de límite termodinámico, análogo al de la eficiencia del ciclo de Carnot en este universo de los procesos de concentración de la luz solar ····· 103612727
····· lezzter Preis 62.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Las interacciones moleculares de las mezclas están directamente relacionadas con una magnitud que se conoce como amplitud de la longitud de correlación. Experimentalmente esta magnitud se ha determinado para una gran cantidad de mezclas binarias en las proximidades del punto crítico líquido-líquido por diferentes técnicas entre las que cabe señalar la dispersión de luz, dispersión de rayos X y turbidez. Desafortunadamente en muchas ocasiones esta cantidad no se ha determinado con una precisión aceptable. Las medidas calorimétricas proporcionan, por su parte, una fuente adecuada para la determinación de la amplitud de la longitud de correlación. Además, la viscosidad dinámica de la mezcla crítica de sistemas con puntos críticos presenta una débil divergencia en las proximidades de la temperatura de separación de fases y posee un exponente crítico universal característico. La complejidad del estudio de la viscosidad dinámica radica en la necesidad de realizar una corrección a los valores experimentales, estas correcciones son altamente dependientes del valor de dicha longitud y por lo tanto una combinación de ambas permite el estudio de la viscosidad en mezclas binaria. ····· 1036123088
für 62.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En este libro se describe el desarrollo de un Sistema de Gestión de la Inyección Secuencial de Combustible en el Colector de Admisión del motor de ciclo Otto, el cual basa su gestión en tres señales analógicas que definen: la composición de la mezcla aire combustible en el escape, las r.p.m y la posición de la mariposa de gases del motor. La señal utilizada para evaluar la composición de la mezcla aire combustible proviene de una sonda lambda proporcional (UEGO) instalada en el colector de escape justo antes del catalizador. Esta nueva gestión (a diferencia de las contemporáneas) no posee cartografías previamente grabadas, sino estrategias definidas en el software de control para gestionar el motor según su estado de funcionamiento detectado por el sistema. El sistema está compuesto por tres subsistemas, los cuales se definen como: Subsistema de Adquisición de Datos. Subsistema de Procesamiento de Datos. Subsistema de Inyección Electrónica. ····· 10361137498
für 62.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Los valores de energía de los explosivos se emplean junto con otras propiedades como una medida del buen funcionamiento de los mismos, de modo que los usuarios entienden que al emplear un explosivo con mayor energía disponen de mayor energía para desarrollar contra la roca. En cierto modo esto es cierto, pero existen diversos modos de evaluar la energía de los explosivos, entre los cuales juegan un papel destacado los códigos termodinámicos. En este libro se presentan todas las herramientas relevantes en un código para el cálculo de explosivos: ecuaciones de estado, cálculo del equilibrio químico y cálculo de estados de detonación. Con el fin de examinar qué parámetro energético define mejor la energía disponible en el proceso de la voladura, se ha estudiado la relación del trabajo útil con la energía de fragmentación y otros parámetros de la voladura. Asimismo se han desarrollado dos modelos de reacción parcial que permiten explicar el comportamiento no ideal de la mayoría de los explosivos industriales. Uno de los modelos de reacción parcial propuestos se ha aplicado a los resultados experimentales obtenidos mediante el test del cilindro con explosivos industriales. ····· 1036189536
für 62.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Fundamental industrial issues that influence effective performance and operations of thermal power plant in an economic and environmentally friendly manner were addressed in this book. For instance, it was revealed in this book how operation of condenser at inappropriate condenser cooling water flowrate could cost the plant operator. The influence of reference temperature on plant efficiency and cost of operation was also addressed. From this book, it was also established that effective operation of thermal power plant saved not only cost but also guaranteed friendly environment. The concepts adopted in this book could also be applied in other process industries other than thermal power plant. The results obtained from the case study could serve as reference materials and helpful information for the plant operators towards schedule of contingency plan. ····· 1036119654
für 69.21€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Volatile organic compounds (VOCs) have a profoundly negative impact on the wellbeing of the environment. Besides being major contributors to global air pollution, VOCs also adversely affect human health. Thus, chemical industries are being increasingly pressurised into limiting the release of VOCs into the atmosphere. Chemical industries often use absorption processes to accomplish this task. The methyl esters that constitute biodiesel are an environmentally friendly substitute for conventional organic solvents in absorbing and removing VOCs from waste process gas streams. This book focuses on the use of UNIFAC as a thermodynamic model to evaluate which VOCs are suitable for absorption by the solvent biodiesel. This is accomplished by measuring the activity coefficients of various VOC/ biodiesel mixtures. In the book, various VOC control technologies are investigated and an investigation into the various thermodynamic models used in computing activity coefficient values is also conducted. This book will be useful to anyone who is searching for a suitable absorption solvent, as well as those who wish to know more about the various thermodynamic models being used by industry today. ····· 1036119850
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In any study of the properties of materials, it is obviously crucial to include the effect of anharmonicity at an extreme environment, which is accompanied by the changes in the elastic, vibrational and mechanical properties. There are two issues to be resolved when trying to compute the properties of metals at finite temperatures and pressures: first is how to describe the inter-atomic interactions of statistical nature accurately, and second is how to incorporate the effects of expansion and compression into this description. As for computing the effects of temperature and pressure, in principle, any of the first principles methods can be used. Unfortunately, though these ab initio methods are physically robust, they show some practical difficulties at high temperatures and pressures, and are relatively cumbersome too. In this view, results of ab initio methods at ambient conditions are combined to finite temperature methods such as mean-field theory to estimate complete thermodynamics of materials at high-T,P conditions. The present monograph is the illustration of the same, with special reference to metals. ····· 1036186513
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Thermodynamic description and prediction of the complex multi-phase systems, prone to gas hydrate and salt formation, is crucial to the economical and safe design and operation of oil and gas production and transportation facilities, in particular in offshore and deepwater regions. The topics presented in this book included modelling of the phase behaviour and gas solubility in the water-hydrocarbon systems in the presence of electrolyte solutions with/without hydrate organic inhibitors, as well as development of tools and methods to predict gas hydrate formation and salt precipitation problems associated with petroleum exploration and production. A new thermodynamic approach capable of predicting vapour-liquid-solid equilibria (VLSE) in systems containing electrolytes or electrolyte and organic inhibitors at conditions relevant to subsea transportation of oil and gas is presented.Various generic correlation for predicting the hydrate suppression temperature as well as the compatibility concerns of different hydrate and scale inhibitors are also described. Potential of using gas hydrate technology for different processess is also explained. ····· 1036199677
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The goal of the research documented in the thesis is to investigate the stability of ferrofluids. In particular, the work focuses on the thin layer of ferrofluid heated from below. Chapter 1 has provided a brief overview of ferrofluid history along with several basic definitions needed to understand the material presented in the later chapters. Chapter 2 deals with the theoretical investigation of the nonlinear stability analysis of magnetized ferrofluid heated from below. Chapters 3 and 4 are devoted to study the effect of rotation and solute, respectively, on stability of magnetized Introduction 29 ferrofluid. Chapter 5 deals with the theoretical investigation of the nonlinear stability analysis of magnetized ferrofluid heated from below saturating a porous medium of high permeability via generalized energy method using a Brinkman model. Chapters 6 and 7 focus on studying the effect of rotation and solute respectively, on stability of magnetized ferrofluid saturating a porous medium. Finally, a summary of the present work and some future directions are presented. ····· 10361102110
····· lezzter Preis 71.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The mechanical transduction gain of nanoelectromechanical systems (NEMS) has been thoroughly studied, but the drive power has always been a priori limited to the onset of non-linearities. Besides, the smaller the structures, the sooner non-linearities occur, reducing their dynamic range and even making extremely difficult to detect their oscillation. In this thesis, this limitation is reconsidered, i.e. the non-linear dynamics of M&NEMS sensors is investigated. Several analytical design rules are provided in order to enhance the dynamic range of nanoresonators and the detection limit of NEMS-based resonant sensors. These rules essentially include hysteresis suppression by non-linearity cancellation as well as mixed behavior and pull-in retarding under superharmonic resonance and simultaneous resonances leading to the possibility of driving the resonator linearly at high oscillations compared to the critical amplitude. The experimental validation of the model has been performed in the case of resonant capacitive MEMS and M&NEMS accelerometers and gyroscopes as well as capacitive and piezoresistive gas/mass sensors. ····· 10361113911
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The work considers some free surface problems and attempts to understand the intrinsic complex behavior of waves in thin films down an inclined plane or vertical wall. The viscous Newtonian thin film or non-Newtonian inelastic power-law film or viscoelastic film down an inclined plane or vertical wall is considered and dynamics of waves and stability characteristics of thin film flow systems are analyzed. The investigations are based on the derivation of an amplitude equation of Landau-Stuart type for the evolution of waves for isothermal or non-isothermal films valid in the neighborhood of a neutral curve or on the use of modern bifurcation techniques of dynamical systems theory together with direct numerical integration to construct weakly nonlinear permanent waves on Newtonian / viscoelastic films for moderate to high Reynolds numbers and small to moderate surface tension effects. The work also considers the development of a flow of a viscous conducting fluid over a rough spinning disk in the presence of a transverse magnetic field with or without induced air shear effects. The entire work is divided into seven chapters. ····· 10361102659
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book offers an analytical review of thermodynamic processes through EES (Engineering Equation Solver). The aim is to facilitate the study of the principles of thermodynamics, in a gradual and progressive manner. As the resolution of certain problems calls for a numerical solution, EES software simplifies the calculation procedure. The book is organized into 6 chapters. The first chapter is a review of the basic thermodynamic concepts, laws and equations. The second deals with steam/vapour cycles and the third with gas cycles. The fourth chapter concerns exergetic (or second law) analysis of different processes and cycles. The fifth chapter deals with psychrometrics and moist air. The sixth and final chapter presents applications related to refrigeration technology. Throughout the second to the sixth chapter, several examples are shown, solved with EES and commented. ····· 10361113237
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray FLOW PROBLEMS WITH HEAT AND MASS TRANSFER. In this Dissertation, investigations are carried out on Natural convection flow of fluid between two infinite vertical parallel plates for different physical situations as well as different fluid properties. The different thermal conditions considered in this dissertation include symmetric and asymmetric heating of the boundaries, periodic temperature variation on the boundaries, viscous dissipation heating as well as the role of Non- Fourier energy equation on convective heat transfer. The dissertation also investigated the influence of heat generation or absorption and mass leakage (suction/injection) through the channel boundaries. Closed form solutions are obtained for momentum, energy and concentration equations for different physical situations. It is hoped that the result presented in this dissertation will be of use in validating Computer routines for numerical solutions of more complex natural convection fluid flows in the presence of heat and mass transfer and in stimulating needed experimental work in this area. ····· 10361113143
für 79.11€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book illustrates phase equilibrium and rate test units design for subcritical and supercritical extraction. Two phase equilibrium data were experimentally obtained for some vitamins and fats (from oil) during supercritical extraction process. A thermodynamics model based on the Regular Solution equations was developed to predict two phase equilibrium data during this process. Furthermore, a statistical analysis was applied in this work. ····· 1036120594
für 80.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray V knige rassmatrivayutsya problemy vvedeniya, obosnovaniya, rasprostraneniya na raznye termodinamicheskie sistemy i primeneniya v razlichnykh oblastyakh nauki odnogo iz vazhneyshikh i trudnykh dlya ponimaniya ponyatiy termodinamiki -khimicheskogo potentsiala. Kniga rasschitana na studentov, prepodavateley i nauchnykh rabotnikov fiziko-khimicheskogo profilya. Ona mozhet byt` polezna spetsialistam vo vsekh oblastyakh nauki i praktiki, ispol`zuyushchikh khimicheskiy potentsial i svyazannye s nim ponyatiya i predstavleniya. ····· 103615120
für 88.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En este trabajo se presenta un procedimiento de diseño, síntesis y operación de un sistema de poligeneración que proporciona de forma conjunta energía y agua desalada a un hotel de la costa Mediterránea. El procedimiento propuesto utiliza como herramienta a la programación matemática (optimización) y se divide en dos niveles: un nivel uno de diseño y síntesis preliminar y un nivel dos de diseño y operación detallado. Los resultados obtenidos indican la viabilidad económica, y se presenta un ahorro de energía que puede alcanzar valores de hasta 16% así como una reducción de gases de efecto invernadero de aproximadamente 600 toneladas de CO2 por año. También se muestran los costes físicos y económicos de cada producto a través del análisis termoeconómico. ····· 10361137883
für 88.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En la actualidad existe una gran preocupación por el ahorro energético para conseguir una menor dependencia de la energía convencional. La integración de sistemas de energías renovables en la edificación, es una importante estrategia para soluciones energéticas sostenibles. Esta integración se encuentra muchas veces limitada en los proyectos arquitectónicos, al darse prioridad a la parte estética frente a otros elementos como es el clima, la orientación de la edificación o el consumo de energía. La integración de los captadores solares en componentes externos de los edificios contribuye a la reducción de costes en la implementación, permitiendo además una mayor libertad arquitectónica. En este libro se estudia un nuevo tipo de captador solar térmico integrado en sombreadores de edificios. Además de calentar agua, controla las ganancias solares sobre las superficies acristaladas donde es instalado. Se modeló, se validó experimentalmente y se evaluó la aplicación para calentamiento de agua sanitaria, con estudio de la viabilidad económica y ambiental. Este trabajo puede ayudar a ingenieros o arquitectos que deseen implementar colectores solares térmicos en sus proyectos. ····· 103611300
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