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Partialization losses of ON/OFF operation of water-to-water refrigeration/heat-pump units.

Author(s) : CORBERÁN J. M., DONADELLO D., MARTÍNEZ-GALVÁN I., et al.

Type of article: Article, IJR article

Summary

This paper presents the results of an experimental campaign for the characterization of the dynamic behavior of a water-to-water refrigeration/heat-pump unit under ON/OFF operation. The unit was previously tested at different water inlet temperatures under steady state conditions, and a very good agreement was found between the instantaneous dynamic performance of the heat pump and the corresponding quasi-steady state operation. In parallel, a series of tests were carried out to quantify the coefficient of performance (COP) degradation as a function of the load ratio, and a simple formula for the Part Load Factor is presented. Results lead to the conclusion that the only non-negligible factor in the COP degradation is the stand-by electrical consumption during the OFF period, especially at low load ratios. Finally, it is concluded that the minimization of the stand-by consumption is a key point for the future improvement of the seasonal performance of water-to-water systems.

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Pages: 2251-2261

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Details

  • Original title: Partialization losses of ON/OFF operation of water-to-water refrigeration/heat-pump units.
  • Record ID : 30009837
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 8
  • Publication date: 2013/12

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