Simulation with Entropy in Engineering Thermodynamics

Understanding Matter and Systems with Bondgraphs

By: Jean Thoma, Gianni Mocellin

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Hardcover | 23 May 2006

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Hardcover
152 Pages

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23.5 x 15.88 x 1.27

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It is with great pleasure that we present this book to the public. In principle it is about thermodynamics, especially the simulation of thermo?uid systems. In popular opinion, thermodynamics is considered to be highly abstract and di?cult to comprehend with its many symbols. We endeavor to show the reader how simple and beautiful thermodynamics really is. To achieve this simplicity we apply two innovations: Forus, entropyisasubstance-likeconcept, akindofthermalcharge, analogous to the well-known electric charge, and not the abstract and incomprehensible Clausius integral. This is by no means a new idea: apart from Sadi Carnot himself, people such as Callendar (1911), Job (1971), Falk (1976) and Fuchs (1996) all adopt the same point of view. We stress where thermal charge is analogous with electric charge and also point out the di?erences between them. To represent thermal systems we use Bondgraphs (BG), which are admirably suited to this purpose. They allow us to avoid many complex equations with numerous subscripts and superscripts. Of course, literature on BG abounds, including three books by present co-author Prof. Thoma and several other books published by Springer. We use BG more as a means to clarify the nature of physical variables and theiranalogiesinother?eldsratherthanfromtheviewpointofelectronicdata processing. For example, the di?erence between c (speci?c heat at constant v volume)andc (speci?cheatatconstantpressure)iscommontoallmultipo- p Cs; and BG make this very clear.

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You Can Find This Book In

Non-Fiction Science Physics Classical Mathematics Energy Thermodynamics & Heat Engineering & Technology Mechanical Engineering & Materials Mechanical Engineering Technology in General Engineering in General Materials Science

Mechanics of Solids

Thermodynamics as a Universal Science	p. 1
Transmission of thermal power	p. 1
Accumulation equation	p. 3
Examples of oneport-C's and multiport-C's	p. 4
Oneports	p. 4
Twoports and multiports	p. 5
Mechanical example of a table with leg fixed to the ground	p. 5
Moving plates capacitor as an electromechanical example	p. 6
Thermal multiport-C and the laws of thermodynamics	p. 8
General	p. 8
Control engineering block diagrams	p. 9
Entropy after Clausius	p. 11
Principles or laws of thermodynamics	p. 12
Thermodynamics in pictures	p. 13
Case of an ideal gas	p. 15
Equilibrium in thermodynamics and electricity	p. 16
Thermal radiation	p. 18
Frictions and Irreversibilities	p. 23
Frictions of all kinds	p. 23
Heat conduction over a finite temperature drop, and combined conduction	p. 24
Combined entropy and electric conduction	p. 26
Carnot cycle between two sources with friction	p. 28
Heat fl ux and entropy fl ow	p. 31
Mass Flows	p. 33
Flow processes	p. 33
Enthalpy and entropy in fl uids pipes	p. 39
Heat exchangers	p. 41
Thermal turbo machines	p. 42
Gas flow between two vessels with scavenging	p. 44
Two-phase flow in boilers and condensers	p. 47
Units and overvalues in thermodynamics	p. 50
Origins of entropy and enthalpy	p. 51
Exergy, an accountant's reserve	p. 51
High velocity turbomachines	p. 52
Chemical Reactions and Osmosis	p. 57
Chemical equilibria and entropy stripping	p. 57
Entropy Stripping	p. 60
Chemical reactions	p. 66
Near to and far from equilibrium	p. 69
Parallel and competing reactions	p. 70
Osmosis as a bridge between physical, chemical and biological effects	p. 70
Reversible mixing and Gibb's paradox	p. 74
Tellegen's theorem and chemical inductance	p. 77
Tellegen's theorem	p. 77
Chemical inductance	p. 78
Entropy and Information Theory	p. 79
Orders of magnitude and microscopic entropy	p. 79
Entropy of a message after Shannon	p. 80
Micro-information and negentropy	p. 82
Information theory, noise and organization	p. 83
Applications	p. 84
Brusselator and Prigogine's minimum entropy principle	p. 84
Bhopalator	p. 87
Information theory, diesel locomotives and capital	p. 88
Energy Consumption	p. 89
Transmission of Technical Information	p. 89
Solar energy and thermal balance of the earth	p. 90
Climate Change and Global Warming	p. 92
Negentropic city	p. 93
Philosophical questions	p. 93
Bibliography	p. 95
Understanding with Bond Graphs	p. 101
Elements	p. 101
Bonds and connections	p. 102
One port elements or one ports	p. 103
One and a half ports	p. 104
Two port elements or two ports	p. 104
Junctions elements or three ports	p. 105
Multiport elements or multiports	p. 106
Energy and power conservation	p. 107
Power signs	p. 108
Negative resistances and negative C-elements	p. 110
Compact units in pneumatics and hot gas	p. 110
Multiport-C signs in thermodynamics and Maxwell relations	p. 112
Control Systems with Bond Graphs	p. 115
Historical Notes	p. 119
Epilogue	p. 121
Concepts	p. 123
Symbols	p. 129
Index	p. 135
Table of Contents provided by Publisher. All Rights Reserved.

Simulation with Entropy in Engineering Thermodynamics

Understanding Matter and Systems with Bondgraphs

At a Glance

Hardcover

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