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IIR document

Regenerated air cycle potentials in heat pump applications.

Number: pap. ID54

Author(s) : YUAN H., ZHANG C. L.

Summary

Air (reversed Brayton) cycle has been utilized in the area of refrigeration and cryogenics for several decades, yet its potentials in heat pump system was longtime underestimated. In this paper, a thermodynamic model for the regenerated air heat pump cycle with practical compressor, expander and regenerated heat exchanger was developed. Based on the model, the relations between the system performance and the operating parameters are analyzed. The optimal heating COP and the corresponding pressure ratio were derived. Then, air heat pump cycles (regenerated cycle and basic cycle) and vapor-compression heat pump cycles (CO2 trans-critical cycle and R410A cycle) are numerically compared. The comparison shows that regenerated air heat pump cycle not only gets the heating capacity in line with the heating load under different operating conditions but also achieves higher COP over trans-critical CO2 heat pump cycle in a wide temperature range.

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Pages: 8 p.

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Details

  • Original title: Regenerated air cycle potentials in heat pump applications.
  • Record ID : 30012351
  • Languages: English
  • Source: 11th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014). Proceedings. Hangzhou, China, August 31-September 2, 2014.
  • Publication date: 2014/08/02

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