Simulation with Entropy in Engineering Thermodynamics: Understanding Matter and Systems with BondgraphsIt 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. |
Other editions - View all
Simulation with Entropy in Engineering Thermodynamics: Understanding Matter ... Jean Thoma,Gianni Mocellin No preview available - 2010 |
Simulation with Entropy in Engineering Thermodynamics: Understanding Matter ... Jean Thoma,Gianni Mocellin No preview available - 2006 |
Common terms and phrases
1-junction applied Atlan block diagram boiler bond Bondgraph Bondgraph symbol capacitors Carnot cycle causality cavity chemical equilibrium chemical reactions chemical tension connected constant pressure constant volume density derivative dissipation effort source electric elements enthalpy enthalpy flux entropy and volume entropy capacity entropy flow entropy stripping equal equation example exergy f₁ Falk flow source fluid bond fluid pipe friction heat conduction heat exchanger heat flow Hence HEXA hydraulic information theory internal energy irreversible junction lower temperature mass flow Maxwell Maxwell relations mechanical membrane micro-information Mocellin modulated molar flow Multi-energy multiport multiport-C negative negentropy Peltier effect phase piston power conserving produces pseudo pseudo-BG R-element radiation reactants RECO resistor reversible Schematic shown in Fig signal simulation specific heat steam stoichiometric coefficients stripping and unstripping thermal charge thermal power thermal radiation thermodynamics Thermofluid Thoma transformers true BG variable velocity voltage volume flow zero