Journal
ENERGIES
Volume 8, Issue 12, Pages 13378-13394Publisher
MDPI
DOI: 10.3390/en81212365
Keywords
solar thermal storage; ground source heat pump system; simulation; case study; LCC
Categories
Funding
- New & Renewable Energy Core Technology Program of Korea Institute of Energy Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy, Republic of Korea [20133030110900]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20133030110900] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A ground source heat pump system (GSHPS) utilizes a relatively stable underground temperature to achieve energy-saving for heating and cooling in buildings. However, continuous long-term operation will reduce the soil temperature in winter, resulting in a decline in system performance. In this research, in order to improve the system performance of a GSHPS, a ground heat pump system integrated with solar thermal storage was developed. This solar-assisted ground heat pump system (SAGHPS) can both maintain the balance of the soil temperature effectively and achieve higher system performance than the conventional system. In this paper, in order to examine the characteristics of the system, a dynamic simulation was conducted under various conditions. The results of our case study provide specific operation data such as heat exchange rate, heat source temperature, and heat pump COP. As a result, the heat pump COP of SAGHPS was 4.7%, 9.3% higher than that of the GSHPS.
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