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Exergy analysis for stationary flow systems with several heat exchange temperatures
Author(s) -
Lampinen Markku J.,
Heikkinen Merja A.
Publication year - 1995
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.4440190506
Subject(s) - exergy , carnot cycle , brayton cycle , heat exchanger , heat pump , thermodynamics , exergy efficiency , absorption heat pump , flow (mathematics) , mechanics , control theory (sociology) , process engineering , mathematics , engineering , computer science , physics , control (management) , artificial intelligence
Abstract A thermodynamic theory of exergy analysis for a stationary flow system having several heat inputs and outputs at different temperature levels is presented. As a new result a relevant reference temperature of the surroundings is derived for each case. Also a general formula which combines exergy analysis with a modified Carnot efficiency is derived. The results are illustrated by numerical examples for mechanical multi‐circuit heat pump cycles, for a Brayton process and for an absorption heat pump.