신재생에너지 (New & Renewable Energy)

  • 제17권3호
  • /
  • Pages.32-41
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  • 2021
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  • 1738-3935(pISSN)
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  • 2713-9999(eISSN)
한국신·재생에너지학회 (Korean Society for New and Renewable Energy)
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암반 대수층에서 개방형 지열 시스템의 개발 및 적용

Development of a Groundwater Source Heat Pump in a Fractured Rock Aquifer

  • Shim, Byoung Ohan (Groundwater Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Seong-Kyun (Groundwater Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Choi, Hanna (Groundwater Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Soo-Hyoung (Groundwater Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Ha, Kyoochul (Groundwater Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Yongchul (Groundwater Research Center, Korea Institute of Geoscience and Mineral Resources)
  • 투고 : 2021.06.10
  • 심사 : 2021.07.06
  • 발행 : 2021.09.25
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초록

A groundwater source heat pump (GWHP) was developed in this study by adapting a borehole heat exchanger with closed-loop and open-loop systems in a new building. In the pilot test building, the air-conditioning on the second floor was designed to employ a closed-loop system and that on the third floor had an open-loop system. The GWHP design is based on the feasibility of groundwater resources at the installation site. For the hydrogeological survey of the study site, pumping and injection tests were conducted, and the feasibility of GWHP installation was evaluated based on the air-conditioning load demand of the building. The site was found to be satisfactory for the design capacity of the thermal load and water quality. In addition, the effect of groundwater movement on the performance of the closed-loop system was tested under three different operational scenarios of groundwater pumping. The performance of the system was sustainable with groundwater flow but declined without appropriate groundwater flow. From long-term observations of the operation, the aquifer temperature change was less than 2℃ at the observation well and 5℃ at the injection well with respect to the initial groundwater temperature. This pilot study is expected to be of guidance for developing GWHPs at fractured rock aquifers.

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과제정보

본 연구는 2021년도 한국지질자원연구원 주요사업(21-3411)의 일환으로 수행되었습니다.

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