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Ground source heat pump systems for energy efficient building retrofitting.

Number: No 098

Author(s) : LAUERMANN M., EMHOFER J., OCHSNER K.

Summary

In the case of building retrofitting, the integration of ground source systems with heating/cooling solutions and heat pumps to achieve maximum performance is a great challenge that demands a solution. In order to find a suitable solution for a given building retrofit scenario, two different heat pump configurations are numerically analysed and compared to each other in terms of heating capacity and coefficient of performance (COP). As working fluid, the Low Global Warming Potential (GWP) refrigerant R1234ze(E) with a GWP smaller than 10 will be used to meet with the current F-Gas regulation by reducing the GWP of fluorinated refrigerants. One favourable heat pump configuration is a twin-cycle system. Alternatively, a single-stage configuration which uses a significantly larger condenser for enhanced subcooling in the refrigeration circuit is also analysed. Both systems allow a more efficient operation compared to state-of-the-art heat pump systems in the case of building retrofitting. In that way, the COP increase in relation to a standard heat pump cycle with typical subcooling is in the range of 10-15% depending on the operating point. 

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Pages: 10 p.

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  • Original title: Ground source heat pump systems for energy efficient building retrofitting.
  • Record ID : 30029980
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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