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Effects of flash and vapor injection on the air-to-air heat pump system.

Number: pap. n. R8, 2477

Author(s) : JANG Y., LEE E., CHIN S., et al.

Summary

A heat pump has received much attention as substitute for the conventional boiler or heating coil because of its high efficiency. For the wide application of the heat pump, the most important design factor is the performance degradation upon its installation in tropical and cold regions. In this study, the effects of phase separator type injection and internal heat exchanger type injection on the heating performance of a two-stage heat pump with an inverter-driven twin rotary compressor were measured and analyzed for compressor frequency ranging from 50 to 95 Hz at ambient temperatures of -20, -15, -10, -5 and 7°C. The COP and heating capacity of the phase separator type injection cycle were enhanced by 17% and 25% than non injection cycle respectively, at the ambient temperature of -15°C. The internal heat exchanger type injection cycle has shown more improvement than phase separator type injection cycle. The COP and heating capacity of the internal heat exchanger type injection cycle were enhanced by 10% and 25% than non injection cycle, respectively at the same condition.

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Pages: 8 p.

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Details

  • Original title: Effects of flash and vapor injection on the air-to-air heat pump system.
  • Record ID : 30000593
  • Languages: English
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/07/12

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