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Integration of heat sources for heat pump operation in the larger capacity range.

Number: 0896

Author(s) : WEMHOENER C., MEIER C.

Summary

In Switzerland, heat pumps (HP) in buildings with higher capacities still have lower market shares. The paper focuses on overcoming limitations of heat sources for HP capacities higher than 50 kW, e.g. for air-source due to noise problems or for borehole heat exchangers (BHE) due to space or drilling restrictions. By combining heat sources, a monovalent HP operation is enabled and due to synergies between the sources, also cost and efficiency benefits can result. By building and system simulations, it was found that the BHE size can be significantly reduced, if only winter peak loads are covered. This will circumvent both the noise limitations of the air-source and the space/drilling limitations of the BHE, and can even make dual-source operation more cost-effective. Regeneration can also result in smaller BHE design. For solar regeneration, favorable ratios regarding collector costs have been determined; while for air heat exchangers, special attention must be paid to the fan power and control. As conclusion, a dual source application does not only offer a monovalent HP application, but can also reduce cost and increase performance.

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Pages: 10 p.

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Details

  • Original title: Integration of heat sources for heat pump operation in the larger capacity range.
  • Record ID : 30033515
  • Languages: English
  • Subject: Technology
  • Source: 14th IEA Heat Pump Conference 2023, Chicago, Illinois.
  • Publication date: 2023/05

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