𝔖 Bobbio Scriptorium
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Bond graphs for thermal energy transport and entropy flow

✍ Scribed by Jean U. Thoma

Publisher
Elsevier Science
Year
1971
Tongue
English
Weight
831 KB
Volume
292
Category
Article
ISSN
0016-0032

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✦ Synopsis

The transport of thermal energy in thermodynamic.8 is &s&bed as the product of entropy $0~ 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 electron&. Bond graph-s are shown to be especially a&table to describe the splitting of applied thermal energy into internal energy and external mechanical work. Transformer8 and the O-and l-junctiona of Paynter can illzcstrate various entropy flow processes, including Carnot engines and heat exchangers. Entrom flow in heat conduction is dktingui._&ed from entropy convection, or transport by moving maaa, where the entropy/temperature characteristic or equation of state is important. Irreveraibilitiea are represented by impedance tranafomnere reducing temperature and increasing entropy flow but conserving power.

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