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Residential CO2 heat pump system for combined space heating and hot water heating.

Author(s) : STENE J.

Summary

A theoretical and experimental study has been carried out for a residential brine-to-water CO2 heat pump system for combined space heating and hot water heating - a so-called integrated CO2 heat pump system. A 6.5 kW CO2 heat pump unit was constructed and extensively tested. The CO2 heat pump unit was equipped with a unique counterflow tripartite gas cooler for preheating of domestic hot water (DHW), low-temperature space heating and reheating of DHW. The two DHW gas cooler units were connected to a DHW system consisting of an unvented single-shell DHW tank, an inverter controlled pump and a water loop. The CO2 heat pump unit was tested in three different modes: simultaneous space heating and DHW heating, DHW heating only and space heating only. The test results proved that an integrated brine-to-water CO2 heat pump system may achieve the same or higher seasonal performance factor than the most energy efficient state-of-the-art brine-to-water heat pump system.

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Pages: 2004-2

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Details

  • Original title: Residential CO2 heat pump system for combined space heating and hot water heating.
  • Record ID : 2005-2825
  • Languages: English
  • Source: Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
  • Publication date: 2004/08/01

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