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Performance of ground source heat pump that uses direct expansion method for supplying hot water.
Number: pap. n. 647
Author(s) : NISHIZAWA R., TAKEDA T., ISHIGURO S., et al.
Summary
This study investigates the performance of a ground source heat pump that uses the direct expansion method for hot water supply. The performance of cooling and heating/hot water supply systems of a ground source heat pump that uses the direct expansion method is better than that of the conventional ground source heat pump. Considering actual usage conditions, an experiment was conducted using R32 refrigerant. The length of the underground heat exchanger was 30 m. We investigated the maximum value of the amount of extracted heat from the ground by a single underground heat exchanger. The experiment was continued until the temperature of hot water in the tank reached approximately 65 °C. When the discharge amount of hot water was 200 L, the average Coefficient of Performance COP during the experiment was 2.4. When the discharge amount was 300 L, the average COP was 2.3.
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Details
- Original title: Performance of ground source heat pump that uses direct expansion method for supplying hot water.
- Record ID : 30026467
- Languages: English
- Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Publication date: 2019/08/24
- DOI: http://dx.doi.org/10.18462/iir.icr.2019.0647
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Indexing
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Themes:
Heat pumps techniques;
HFCs - Keywords: Hot water; Energy consumption; Direct expansion; R32; Borehole; Heat pump; Ground-source system; Expérimentation; COP
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