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Calculation methods for comparing the performance of pure and mixed working fluids in heat pump applications.

Author(s) : HOGBERG M., VAMLING L., BERNTSSON T.

Type of article: Article, IJR article

Summary

Three methods for comparing cycle performance of working fluids, pure as well as non-azeotropic mixtures, were investigated for two applications and for two mixture pairs, R22-R114 and R22-R142b, and their pure components. The methods differ in the way of calculating the heat exchange processes. They assume, respectively, equal minimum approach temperatures, equal mean temperature differences and equal heat transfer areas. To predict the relations between fluids with high accuracy, one must use the third method. The second method allows to estimate the COP with the same accuracy for mixtures as for pure fluids, and can be used for rough estimations of the COP level with different fluids. The first method should be avoided for non-azeotropic mixtures.

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Pages: 403-413

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Details

  • Original title: Calculation methods for comparing the performance of pure and mixed working fluids in heat pump applications.
  • Record ID : 1994-1194
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 16 - n. 6
  • Publication date: 1993/11

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