Bond graphs for thermal energy transport and entropy flow
| Autor: | Jean U. Thoma |
|---|---|
| Rok vydání: | 1971 |
| Předmět: |
Materials science
Fundamental thermodynamic relation Computer Networks and Communications Entropy production business.industry Applied Mathematics Configuration entropy Thermodynamics Thermal conduction Physics::Fluid Dynamics symbols.namesake Control and Systems Engineering Signal Processing symbols Thermodynamic free energy Carnot heat engine business Absolute zero Thermal energy |
| Zdroj: | Journal of the Franklin Institute. 292:109-120 |
| ISSN: | 0016-0032 |
| DOI: | 10.1016/0016-0032(71)90198-0 |
| Popis: | The transport of thermal energy in thermodynamics is described as the product of entropy flow and of the absolute temperature, in analogy to the volume flow and pressure in oil hydraulics and to electric charge flow (= current) and voltage in electronics. Bond graphs are shown to be especially suitable to describe the splitting of applied thermal energy into internal energy and external mechanical work. Transformers and the 0- and 1- junctions of Paynter can illustrate various entropy flow processes, including Carnot engines and heat exchangers. Entropy flow in heat conduction is distinguished from entropy convection, or transport by moving mass, where the entropy/temperature characteristic or equation of state is important. Irreversibilities are represented by impedance transformers reducing temperature and increasing entropy flow but conserving power. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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