Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Study on the Operation Method of Ground Source Heat Pump System Considering Recovery of Ground Temperature

지중온도회복을 고려한 지열 히트펌프 시스템의 운전방법 검토

  • Bae, Sangmu (Department of Architectural Engineering, Pusan National University) ;
  • Jeon, Jae-Young (Department of Architectural Engineering, Pusan National University) ;
  • Kwon, Young Sik (Department of Architectural Engineering, Pusan National University) ;
  • Nam, Yujin (Department of Architectural Engineering, Pusan National University)
  • Received : 2020.10.15
  • Accepted : 2020.11.23
  • Published : 2020.12.01
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Abstract

Ground source heat pump (GSHP) systems are actively introduced as cooling and heating conditioning systems of buildings due to annual stable performance and easily maintenance. However, ground temperature imbalance is occurred when the GSHP is used for a long period. Therefore, in this study, we proposed the operation method of the system that considered the recovery time of heat source temperature. The entering water temperature (EWT) and heat exchange rate (HER) were comparatively analyzed according to the continuous and intermittent operation. Furthermore, the underground thermal environment was evaluated by numerical analysis model. As the result, the intermittent operation was a maximum of 12.3% higher HER during the heating period than the continuous operation. In addition, the overall ground heat source temperature at the intermittent operation was higher than it at the continuous operation.

Keywords

Acknowledgement

본 연구는 산업통상자원부(MOTIE)와 한국에너지기술평가원(KETEP)의 지원을 받아 수행한 연구과제입니다(No. 20188550000430). 이 논문은 2018년도 정부(교육과학기술부)의 재원으로 한국연구재단의 기초연구사업 지원을 받아 수행된 것임(2018R1D1A3A03001306).

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