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Performance evaluation of a ground-source integrated heat pump for residential net-zero energy buildings across different climates.

Number: 3274

Author(s) : JANG D. S., SKYE H. M.

Summary

Ground-source integrated heat pumps (GSIHPs) can save energy in residential buildings by providing both space conditioning and domestic hot water (DHW) using a single efficient appliance. The efficiency is enabled through use of the thermodynamically favorable heat sink/source of a ground heat exchanger (GHX), and can be enhanced by using variable-speed components. We conducted a TRNSYS simulation to explore the GSIHP’s performance in a residential net-zero energy building located in different climates. Compared to a conventional ground-source heat pump (GSHP), the GSIHP reduced the heating, cooling, dehumidifier, and DHW energy consumption by (25 to 63) %. The baseline GHX length was determined based on the building loads at each climate zone using the Kavanaugh and Rafferty method. The photovoltaic (PV) array was sized to achieve net-zero energy use. Furthermore, the variation in entering liquid temperature (ELT) was studied for long-term operation implications.

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Pages: 9 p.

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  • Original title: Performance evaluation of a ground-source integrated heat pump for residential net-zero energy buildings across different climates.
  • Record ID : 30032943
  • Languages: English
  • Source: 2024 Purdue Conferences. 8th International High Performance Buildings Conference at Purdue.
  • Publication date: 2024/07/15

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