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Optimizing chiller operation based on finite-time thermodynamics: universal modelling and experimental confirmation.

Author(s) : GORDON J. M., NG K. C., CHUA H. T.

Type of article: Article, IJR article

Summary

The efficiency of chillers (refrigeration and heat pump devices) is limited by the dissipation from their principal components: compressor, throttler, and heat exchangers at the condenser and evaporator. Developing a generalized finite-time thermodynamics model for reciprocating chillers, the authors derive analytic formulae for how the fixed finite resources of cycle time and heat exchanger inventory should be allocated so as to optimize chiller performance. The authors predictions for optimal operating schemes are compared with detailed experimental data from two different commercial chillers. The agreement between theory and actual performance data attests to the empirical wisdom that has evolved in chiller manufacture. Besides quantitatively documenting the individual sources of irreversibility, the authors show how the limitations of currently-available chiller components affect optimal chiller design, as well as how potential steps to improve chiller efficiency can be evaluated within a universal thermodynamic framework.

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Pages: 191-200

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Details

  • Original title: Optimizing chiller operation based on finite-time thermodynamics: universal modelling and experimental confirmation.
  • Record ID : 1997-2824
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 20 - n. 3
  • Publication date: 1997/05

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