Entropy-based, air-side heat exchanger performance evaluation method: Application to a condenser

N. C. DeJong, M. C. Gentry, Anthony M Jacobi

Research output: Contribution to journalArticlepeer-review


This paper describes the development of a straightforward, entropy-based method for evaluating air-side heat exchanger performance. Using energy conservation, the appropriate rate equations, and the second law of thermodynamics, all energy interactions were cast into their available-work equivalents with heat transfer rate limitations. The proposed method improved on previous techniques in two ways. First, it placed value explicitly on heat duty, recognizing system design constraints and external entropy generation. Second, it accounted for marginal entropy generation due to coupling between the system and the heat exchanger. The effects of the heat exchanger design on the system can cause significant exergy destruction and must be considered by any good performance measure. The proposed methods were applied to the evaluation of a condenser in a vapor-compression system. The condenser example is discussed here in detail, to explore design tradeoffs.

Original languageEnglish (US)
Pages (from-to)395
Number of pages1
JournalASHRAE Transactions
Issue numberPt 1A
StatePublished - 1998

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes


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