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Optimal volume ratio of two-stage vapour compression system using zeotropic refrigerant.

Author(s) : WANG B., CHENG Z., SHI W., et al.

Type of article: Article, IJR article

Summary

Refrigerant mixtures are commonly regarded as a potential substitute in heat pumps. Two-stage compression is widely applied for improving the performance of heat pumps. The suction volume ratio is a critical design parameter for two-stage heat pumps. In this work, the optimal volume ratio of R32/R1234ze(E) mixture and 26 refrigerants named by ASHRAE Standard 34-2013 are estimated. The obtained result indicates that, for R32/R1234ze(E) mixtures, the optimal volume ratio first decreases and then increases as the R32 component increases, and the optimal volume ratio of flash tank system is lower than the intermediate heat exchanger system owing to component shifting in the flash tank. For estimated 26 refrigerants, the optimal volume ratio of the majority of zeotropic refrigerants is smaller than pure refrigerants and azeotropic refrigerants. In addition, a modified arithmetic mean temperature method is proposed to predict the optimal intermediate refrigerant states.

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Pages: 343-353

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Details

  • Original title: Optimal volume ratio of two-stage vapour compression system using zeotropic refrigerant.
  • Record ID : 30025406
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 98
  • Publication date: 2019/02
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.11.021

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