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Experimental investigations of two types of the dual-loop heat pump systems for ventilation heat recovery.

Number: No 071

Author(s) : MA G., WANG L., MA A., JIA X., LIU Y., FENG Z.

Summary

Heat recovery capability of ventilation system can be effectively improved by using multiple loop independent heat pump cycles. This paper focus on how to further improve the performance in the heat pump system under constant loop number and compressor displacement. The heat recovery performance differences between two types of the dual-loop heat pump system were compared through experimental testing. Results show that COP of the system in which the displacement in the low-pressure loop is twice of that in the high-pressure loop can be increased by 14.78% comparing with the system in which the displacement in the low-pressure loop is half of that in the high-pressure loop. Especially, the COP of the former system is even higher than that of the triplex loop heat pump system under some operating conditions. Therefore, in multi-loop heat pump system for ventilation heat recovery, it is more significant to increase the circulating flow rate of the working fluid in low-pressure loop.

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Pages: 6 p.

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  • Original title: Experimental investigations of two types of the dual-loop heat pump systems for ventilation heat recovery.
  • Record ID : 30029964
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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