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수직 밀폐형 심부지열 순환 시뮬레이터의 성능 평가에 관한 연구
배정형(Jung-Hyeong Bae),이동운(Dong-Woon Lee),윤충만(Chung-Man Yoon),류연수(Yeon-Su Ryoo),정상화(Sang-Hwa Jeong) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.5
While greenhouses have been utilized as a sustainable alternative to traditional soil farming, they are often powered by diesel boilers that necessitate vast amounts of non-renewable energy and emit toxic fumes. Thus, geothermal heat pumps have been proposed as a more energy-efficient substitution for diesel boilers. Currently, most horticultural facilities in the United States use shallow geothermal systems, and are often equipped with horizontal underground heat exchangers as well as heat pump equipment. These shallow geothermal systems require a large drilling site and heat pump to function, which results in high maintenance costs. The heat pump itself consumes a large amount of power, which degrades system performance. Conversely, high temperatures can be attained within a single borehole in deep geothermal vertical closing systems without using a heat pump. This setup can dramatically reduce the power consumption and improve system performance. In this study, we have modeled a circulation simulator after the circulation systems in deep geothermal facilities to analyze a 2000-meter borehole in Naju-Sanpo-myeon. The simulator is operated by manipulating various putative parameters affecting system performance to analyze the system’s coefficient of performance.