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IIR document

Performance study of air source heat pump with multiple parallel outdoor units defrosting alternatively.

Number: pap. n. 1436

Author(s) : NIU J., XU S., MA G., et al.

Summary

In order to solve the problem of reverse-cycle defrosting of large and medium air source heat pump, a new type of air source heat pump cycle with multiple parallel outdoor machines defrosting alternatively was proposed. Through switching valves to realize an outdoor machine defrosting, the rest of the outdoor machines are in the state of normal evaporative heat absorption at the same time. In the case of non-stopping heating, defrosting can be realized while recovering frost thawing cooling capacity. A test platform research system was built in artificial environment room. The law of the variation of the compressor suction, exhaust pressure and the system thermal performance in the condition of frost free, frosting and defrosting were discussed.

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Pages: 9

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Details

  • Original title: Performance study of air source heat pump with multiple parallel outdoor units defrosting alternatively.
  • Record ID : 30026533
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1436

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