암반 대수층에서 개방형 지열 시스템의 개발 및 적용
Development of a Groundwater Source Heat Pump in a Fractured Rock Aquifer
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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.
Abstract
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.
참고문헌 (21)
- "Act on promotion of development, use, and distribution of new energy and renewable energy" (2020)[URL]
- Lee, J. Y, "Current status of ground source heat pumps in Korea", RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 13(6-7), pp.1560~1568 (2009)
- Chiasson, A. D, "Geothermal heat pump and heat engine systems : Theory and practice" (2016), John Wiley &Sons
- 이창희, "Balancing Well 교차혼합 지중열교환기의 스마트 냉난방 히트펌프 시스템의 성능평가에 관한 연구", 신재생에너지, 16(4), pp.41~48 (2020), 한국신·재생에너지학회[DOI]
- Groundwater annual report, "Ministry of environment", Ministry of environment, ~, pp.11-1480000-001551-10 (2020)
- Rees, S, "Advances in ground-source heat pump systems" (2016), Woodhead Publishing
- 배상무, "복수정 페어링 기술을 이용한 개방형 지열 시스템의 수리적 타당성 검토", KIEAE Journal, 17(3), pp.119~124 (2017), 한국생태환경건축학회
- 박영윤, "개방형과 밀폐형 지열냉난방시스템이 수리지질학적 특성에 미치는 영향", 지질학회지, 49(6), pp.649~659 (2013), 대한지질학회[DOI]
- Shim, B. O, "Ground thermal conductivity for(ground source heat pumps)GSHPs in Korea", Energy, 56, pp.167~174 (2013)
- 심병완, "지중 열교환기 효율 분석을 위한 지반내 열적.수리적 특성 조사", 한국자원공학회지, 43(2), pp.97~105 (2006), 한국자원공학회
- thermal use of theu Under-ground, "VDI, V", VDI-Gessellschaft Energie und Umwelt, ~ (2010)
- Choi, H, "Characterization of aquifer hydrochemistry from the operation of a shallow geothermal system", Water, 12(5), pp.1377~ (2020)
- Sophocleous, M, "From safe yield to sustainable development of water resources—the Kansas experience", Journal of Hydrology, 235(1-2), pp.27~43 (2000)
- Kawecki, M, "Meaningful interpretation of step-drawdown tests", Groundwater, 33(1), pp.23~32 (1995)
- Jacob, C. E, "Drawdown test to determine effective radius of artesian well", Trans. Am. Soc. Civil Eng, 112(1), pp.1047~1064 (1947)
- Singh, S. K, "Well loss estimation : Variable pumping replacing step drawdown test", Journal of Hydraulic Engineering, 128(3), pp.343~348 (2002)
- Freeze, R. A., "Groundwater", pp.604~ (1979), Prentice-hall, Inc
- Duffield, G.M, "AQTESOLV for Windows Version 4.5 User’s Guide" (2007), HydroSOLVE. Inc
- Bouwer, H, "Artificial recharge of groundwater : hydrogeology and engineering", Hydrogeology Journal, 10(1), pp.121~142 (2002)
- Halford, K. J, "Interpretation of transmissivity estimates from single-well pumping aquifer tests", Groundwater, 44(3), pp.467~471 (2006)
- 구민호, "국가지하수 관측망의 양수시험 자료를 이용한 국내 대수층 특성의통계적 분석", 지하수토양환경, 10(6), pp.32~44 (2005), 한국지하수토양환경학회