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Heating performance with a volume ratio on 2-stage compressor.

Number: pap. n. R23, 2479

Author(s) : KO Y., PARK S., RYU B., et al.

Summary

Generally, the lower outdoor air temperature gets, the more heating capacity is needed. But the heating capacity of heat pump decreases, when the outdoor air temperature becomes low. As one way to prevent the performance degradation, in this study the heat pump with 2-stage rotary compressor has been investigated with variable volume ratios. The volume ratio is one of the major factors which are influenced to the heat pump performance. The computer simulation and experimental test have shown that the optimal volume ratio is 63% and 59%, respectively. Finally, the heating capacity and COP of the gas injection system are enhanced by 18 % and 10% at the outdoor air temperature of - 15°C, respectively. This improvement is resulted from the increase of refrigerant mass flow rate and efficiency of the evaporator.

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Pages: 9 p.

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Details

  • Original title: Heating performance with a volume ratio on 2-stage compressor.
  • Record ID : 30000979
  • Languages: English
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/12

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