Entropy production analysis and experimental confirmation of absorption systems

H. T. Chua, J. M. Gordon, K. C. Ng, Q. Han

Research output: Contribution to journalArticle

24 Citations (Scopus)


Absorption chillers, heat pumps and heat transformers exploit thermal power input to satisfy a variety of refrigeration and heating applications, as well as to boost the temperature of low-grade heat. Can one arrive at accurate predictions of system performance with a simple analytic irreversible thermodynamic model? In capturing the essential physics of the problem, that model would be required to provide a predictive and diagnostic tool and to permit determination of optimal absorption system operating conditions. We derive such a model and check its validity against experimental data and computer simulation results from a variety of commercial absorption units. We reinforce the observation that commercial units appear to have evolved empirically such that maximum efficiency is realized under design conditions. The failure of a host of previously-published endo-reversible thermodynamic models to account for fundamental qualitative features and accurate predictions of system behavior is documented with computer simulation results and experimental performance data.

Original languageEnglish
Pages (from-to)179-190
Number of pages12
JournalInternational Journal of Refrigeration
Issue number3
Publication statusPublished - 1 Jan 1997
Externally publishedYes

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