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Two-stage air-source heat pump for residential heating and cooling applications in northern US climates.

Author(s) : BERTSCH S. S., GROLL E. A.

Type of article: Article, IJR article

Summary

Air-source heat pumps for residential heating are more widely used than geothermal heat pumps mainly due to their lower installation costs. Major disadvantages of air-source heat pumps are the decrease of heat output and COP, and increase in discharge temperature, towards low outdoor temperatures. In this paper an air-source two-stage heat pump using R-410A as the refrigerant was simulated, designed, constructed, and tested at ambient temperatures as low as -30°C and supply temperatures of up to 50°C in air and water heating mode. In addition, the system is able to provide sufficient air conditioning in cooling mode (approximately 50-60% of the design heat transfer rate in heating mode). A short summary of an extended literature review is shown as well as a theoretical screening study of the three most promising cycles. Furthermore, the design and test results of a breadboard system and a comparison with commercially available heat pumps are presented. Second law efficiencies of up to 45% could be achieved, resulting in a COP of 2.1 at -30°C ambient temperature

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Pages: 1282-1292

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Details

  • Original title: Two-stage air-source heat pump for residential heating and cooling applications in northern US climates.
  • Record ID : 2008-2737
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 7
  • Publication date: 2008/11

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