Balancing Well 교차혼합 지중열교환기의 스마트 냉난방 히트펌프 시스템의 성능평가에 관한 연구
Study on the Performance Evaluation of Smart Heating and Cooling Heat Pump System in a Balancing Well Cross-Conditioned Ground Heat Exchanger
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This study performed a single hole operation method using a balancing well-cross-mixed underground heat exchanger, and conducted thermal performance studies of an SCW-type underground heat exchanger using a two-well. The study attempted to change the existing operating method of the two adjacent SCW underground heat exchangers with one ball each. The SCW-type geothermal heat exchanger is considered to enable up to 20% of bleed discharge at maximum load, which makes groundwater usage unequal. The efficiency factor of the geothermal system was improved by constructing the discharged water by cross-mixing two balancing wells to prevent the discharge of groundwater sources and keep the temperature of the underground heat exchanger constant. As a result of the cooling and heating operation with the existing SCW heat exchange system and the balancing well-cross-mixed heat exchange system, the measured performance coefficient improved by 23% and 12% in cooling and heating operations, respectively. In addition, when operating with a balanced cross-mixing heat exchange system, it has been confirmed that the initial basement temperature is constant with a standard deviation of 0.08 to 0.12°C.
Abstract
This study performed a single hole operation method using a balancing well-cross-mixed underground heat exchanger, and conducted thermal performance studies of an SCW-type underground heat exchanger using a two-well. The study attempted to change the existing operating method of the two adjacent SCW underground heat exchangers with one ball each. The SCW-type geothermal heat exchanger is considered to enable up to 20% of bleed discharge at maximum load, which makes groundwater usage unequal. The efficiency factor of the geothermal system was improved by constructing the discharged water by cross-mixing two balancing wells to prevent the discharge of groundwater sources and keep the temperature of the underground heat exchanger constant. As a result of the cooling and heating operation with the existing SCW heat exchange system and the balancing well-cross-mixed heat exchange system, the measured performance coefficient improved by 23% and 12% in cooling and heating operations, respectively. In addition, when operating with a balanced cross-mixing heat exchange system, it has been confirmed that the initial basement temperature is constant with a standard deviation of 0.08 to 0.12°C.
참고문헌 (11)
- 조윤주, "지열히트펌프시스템의 설치 및 운영이 토양·지하수에 미치는 영향에 대한 고찰", 지하수토양환경, 14(3), pp.22~31 (2009), 한국지하수토양환경학회
- 박영윤, "개방형 지열냉난방시스템의 순환수에서 온도와 압력변화에 따른 탄산염 광물의 침전 가능성 평가", 지질학회지, 51(6), pp.623~628 (2015), 대한지질학회[DOI]
- Bak, H. M., "Estimation of yield capacity of fractured rock aquifer for multi-well groundwater heat pump system", M.S., pp.2016
- 김남주, "개방형 지열공의 페어링기술 적용을 위한 수리지질학적 연구", 지질학회지, 54(2), pp.205~213 (2018), 대한지질학회[DOI]
- Cooper, H. H., "A generalized graphical method for evaluating formation constants and summarizing well field history", Am. Geophys. Union Trans, 27(4), pp.526~534 (1946)
- Alessio Fileccia, "Some simple procedures for the calculation of the influence radius and well head protection areas (theoretical approach and a field case for a water table aquifer in an alluvial plain)", Acque Sotterranee - Italian Journal of Groundwater, 4(3), pp.7~23 (2015), PAGEPress Publications[DOI]
- Description and evaluation of selected methods used to delineate Wellhead protection areas around public supply wells near Mt. Hope, Kansas, "Hansen, C. V.", USGS, ~, pp.USGS Water-Resources Investigation Report 90-4102 (1991)
- US EPA Office of Ground Water Protection, "Guidelines for delineation of wellhead protection areas", ~ (1987)
- 김홍교, "실증실험에 근거한 관정간 페어링 적용 개방형 지열 시스템의 난방성능 분석", KIEAE Journal, 18(2), pp.25~31 (2018), 한국생태환경건축학회[DOI]
- 박재훈, "다양한 형상의 수직형 지중열교환기에 대한 유동 및 열전달특성의 수치적 연구", 신재생에너지, 13(4), pp.39~48 (2017), 한국신·재생에너지학회
- Lee, C. H., "Thermal performance of a standing column well geothermal heat exchanger system using re-injection of bleeding water", Geothermics, 82, pp.73~80 (2019)