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CO2 heat pumps for residential applications.

Author(s) : HALOZAN H., RIEBERER R.

Summary

In this CO2 heat pumping system, water heaters and air heating systems have been investigated. With heat pump water heaters presently available on the market 60 °C cannot be achieved without an auxiliary heating system. CO2 enables 60 °C to be achieved very efficiently with COPs of 4 to 5 and without any problems. The optimum pressure, where the maximum COP can be achieved, is between 90 and 100 bar. One problem is reducing the heat losses through insulated pipes. Low-heating-energy houses are characterized by small transmission losses compared with ventilation losses. A further reduction of heat consumption can be achieved by controlled ventilation systems with exhaust air heat recovery by heat pumps or combinations of heat exchangers and heat pumps. CO2 heat pumps can be used for that purpose. They also allow production of hot tap water, all year round.

Details

  • Original title: CO2 heat pumps for residential applications.
  • Record ID : 2000-1749
  • Languages: English
  • Source: CO2 technology in refrigeration, heat pump & air conditioning systems (with presentation of the results of the European JOULE/THERMIE Research Programme on CO2 heat pumping systems - COHEPS). Workshop proceedings.
  • Publication date: 1999/03/18
  • Document available for consultation in the library of the IIR headquarters only.

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