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Brine-to-water CO2 heat pump systems for heating and cooling of non-residential buildings.

Author(s) : STENE J.

Type of article: Article

Summary

Carbon dioxide (CO2) has been identified as an interesting working fluid in brine-to-water heat pumps for heating and cooling of non-residential buildings. Connecting such a heat pump in series with a hydronic radiator and ventilation heater system provides a relatively low return temperature in the system, and thus favourable operating conditions for a CO2 heat pump. Preheating and reheating of domestic hot water will lead to a further increase in the COP of the CO2 heat pump system. Computer simulations have demonstratedthat a CO2 heat pump system in non-residential buildings can achieve the same or higher seasonal performance factor (SPF) than heat pumps using conventional working fluids, as long as the heat distribution system is designed for a low return temperature. The operational time of the ventilation system will have a major impact on the SPF of the CO2 heat pump, since the return temperature in the heat distribution system is considerably lower when the ventilation system is in operation.

Details

  • Original title: Brine-to-water CO2 heat pump systems for heating and cooling of non-residential buildings.
  • Record ID : 2007-0841
  • Languages: English
  • Source: IEA HPC Newsl. - vol. 24 - n. 3
  • Publication date: 2006

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