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Effects of economizer type and size to the gas injected system using zeotropic R32/R1234ze(E) mixture.

Number: pap. 2398

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

Summary

Refrigerant mixtures are commonly regarded as a potential substitute because rare pure refrigerants can totally meet all the requirements of environmental, thermodynamic and safe properties. Meanwhile, as an effective means, gas injected system is widely applied to improve the system performance of heat pump under large compression ratio. However, the effects of the economizer’s configuration on the performance is still unclear. In this paper, a water-water heat pump with scroll compressor and charged with R32/R1234ze(E) mixtures is chosen to carry out the investigation. A thermodynamic model which could handle different suction and injected concentration refrigerant is derived. On the basis of this model, a detailed comparison of different gas injected configurations and the size of intermediate heat exchanger (IHX) in IHX system are investigated. The results indicate that both flash tank (FT) gas injection and IHX injection can largely enhance the heating capacity and COP of water-water heat pump using R32/R1234ze(E) mixture. However, IHX system with large IHX is a better choice for zeotropic R32/R1234ze(E) gas injected system.

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Pages: 9

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Details

  • Original title: Effects of economizer type and size to the gas injected system using zeotropic R32/R1234ze(E) mixture.
  • Record ID : 30024536
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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