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Performance evaluation of a heat pump cycle using NARMs by a simulation with equations of heat transfer and pressure drop.

Author(s) : MIYARA A., KOYAMA S., FUJII T.

Type of article: Article, IJR article

Summary

Simulation analysis for a vapour compression heat pump cycle using non-azeotropic refrigerant mixtures (NARMs) of R22 and R114 are conducted under the condition that the heat pump thermal output and the flow rate and inlet temperatures of the heat sink and source water are given. The heat transfer coefficients of the condensation and evaporation are calculated with empirical correlations proposed by the authors. The validity of the evaluation method and the correlations is demonstrated by comparison with experimental data. The relations between the COP and composition are shown under two conditions: 1) the constant heat transfer length of the condenser and evaporator; and 2) the constant temperature of refrigerant at the heat exchanger inlet. The COP of the NARMs is higher than that of pure refrigerant when the heat transfer lengths of the condenser and evaporator are sufficiently long.

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Pages: 161-168

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Details

  • Original title: Performance evaluation of a heat pump cycle using NARMs by a simulation with equations of heat transfer and pressure drop.
  • Record ID : 1993-3591
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 16 - n. 3
  • Publication date: 1993/05

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