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

Published

April 22, 2024

Author(s)

Dongsoo Jang, Harrison M. Skye

Abstract

Ground-source integrated heat pumps (GSIHPs) can save energy in residential buildings by providing all the heating, ventilation, air-conditioning (HVAC), 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 performance in a residential net-zero energy building 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 size of photovoltaic (PV) panels affected by the solar radiation was determined to achieve net-zero energy use. Furthermore, the variation in entering liquid temperature (ELT) was studied for long-term operation implications.

Proceedings Title

Herrick Conferences 2024

Conference Dates

July 15-18, 2024

Conference Location

West Lafayette, IN, US

Pub Type

Conferences

Keywords

Net-zero energy building, Ground-source integrated heat pump, HVAC, Domestic hot water, TRNSYS simulation

Citation

Jang, D. and Skye, H. (2024), Performance evaluation of ground-source integrated heat pump for residential net-zero energy buildings across different climates, Herrick Conferences 2024, West Lafayette, IN, US (Accessed June 29, 2024)