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CO2 heat pump system for heating and cooling of non-residential buildings.

Author(s) : STENE J., JAKOBSEN A., ANDRESEN T.

Summary

CO2 heat pumps installed in non-residential buildings will achieve a high COP as long as the heat is rejected over a large temperature range and the return temperature in the heat distribution system is relatively low. In European non-residential buildings high-temperature radiators are commonly used to cover the space heating demand, and a CO2 heat pump rejecting heat to only radiators will achieve a low COP due to the high return temperature. However, in many non-residential buildings the demand for heating of ventilation air after the heat recovery unit constitutes a relatively large share of the total heating demand of the building. Computer simulations have demonstrated that 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 construction of a prototype CO2 heat pump system for heating and cooling of a 3,000-5,000 m2 Norwegian non-residential building is now being planned. The nominal heating capacity of the heat pump will be in the range of 50 to 150 kW, and it will be designed as a single-stage unit using an inverter controlled reciprocating compressor.

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Pages: 2006-2

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Details

  • Original title: CO2 heat pump system for heating and cooling of non-residential buildings.
  • Record ID : 2007-1755
  • Languages: English
  • Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Publication date: 2006/05/29

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