Modelling and Simulation in Thermal and Chemical Engineering: A Bond Graph Approach

ISBN-13: 9783540663881 / Angielski / Twarda / 1999 / 219 str.

Jean Thoma; B. Ould Bouamama

Opis

It is a great pleasure for me to introduce this book which has the main ambition to make thermodynamics more directly accessible to engineers and physicists by stressing the analogies with the other physical domains; this science has discouraged more than a few students. The book comes from the meeting of two persons: 1. Jean Thoma, inventor of hydrostatic machines and transmissions, pro fessor at the University of Waterloo (Canada), expert in simulation and pilgrim for the promotion of bond graphs around the world. 2. Belkacem Ould Bouamama, associated professor at the University of Science and Technology in Lille, France, specialist in industrial control and seduced by the richness and structure of the bond graph method. Thermodynamics is a difficult subject; its concepts like entropy, enthalpy, etc. are not intuitive and often very abstract. For this reason, it is current practice to neglect the thermal aspects, although they are necessarily there in all physical phenomena, and to use isothermal models. This is equivalent to think that the system is immersed in an infinite temperature reservoir and maintains its temperature constant even if it receives or dissipates electric and other type of energy. For heat transfer and variable temperature, if it should be included, the classical approach is to study the changes between equilibrium states, and not the process itself, which is more a thermostatic than a thermodynamic approach. This is justified when only the constraints of equilibrium state must be satisfied."

Spis treści

1 Introduction to Thermodynamic Systems Modelling.- 2 Modelling of Thermofluids.- 3 Modelling of Chemical Systems and Phase Change.- 4 Bond Graph and Process Engineering.- 5 Industrial Application of Bond Graph Modelling.- A Elements of Bond Graph Modelling.- A.1 Definition.- A.2 Bond Graph Elements with one Port.- A.2.1 Representation.- A.2.2 Used Variables in Bond Graph Modelling.- A.2.3 Passive Elements.- A.2.4 Active Elements.- A.2.5 Junctions.- A.3 Bond Graph Elements with two Ports.- A.3.1 Transformer TF.- A.3.2 Gyrator GY.- A.3.3 Carrousel of Thoma.- A.3.4 Information Bonds.- A.4 Multiports Elements or C, I and R Fields.- A.4.1 Mixed Multiport IC.- A.4.2 Multiport R.- A.4.3 Multiport RS.- A.5 Causality Concept.- A.5.1 Rules of Causality Selection.- A.6 Bicausal Bond Graphs.- A.7 State Space Equations Associated to a Bond Graph..- A.8 Pseudo Bond Graphs.- A.9 Conservation of Power and Conservation of Energy.- A.10 Thermal Inertia and Second Law of Thermodynamics.- A.11 Inverse Analogy.- A.12 References.- B Listing of Simulation Programs.- B.1 Hydro-Pneumatic Accumulator (Tutsim).- B.2 Refueling Pneumatic Automobiles (Tutsim).- B.3 Cooling of fuel for Diesel Cars (Tutsim).- B.4 Ventilation of a building (Twentesim).- B.5 Instrumentation of a Steam generator.- C Polynomial thermodynamic Functions.- D Heat Losses and Heat Exchanger Coefficients of Collectors.- D.1 Not Insulated Steam Conduit.- D.2 Insulated Steam Conduit.- D.3 Calculation of Heat Exchange Coefficients.- D.3.1 Superficial Heat Exchange Coefficient.- D.3.2 External Heat Exchange Coefficient.- D.4 References.- E Simulation Programs under Matlab-Simulink.- E.1 Block Diagram for the Steam Accumulator.- E.2 Resolution of the equation of two phase mixture.- F Heat Radiation and Solar Energy.- F.1 Units and Usual values of Power.- F.2 Heat Radiation and Solar Energy.- F.2.1 Solar Energy.- F.2.2 Thermal Balance of the Earth.- F.2.3 Thermal Radiation.- F.2.4 Solar Collector.- F.2.5 Glass House Effect and Thermal Death.- F.3 Philosophical Questions.- F.4 References.- 7 Liste of Used Symbols.

Blurb

The main object of this book is modeling and simulation of energetic processes by bond graphs. But even without knowledge of this powerful method it can be used to a certain extent as an introduction to simulation in thermodynamics. The book addresses advanced students, lecturers and researchers in mechanical engineering and automation as well as experienced engineers in process industries.