수평형 지중열교환기의 열전달 및 압력강하 특성에 관한 수치해석적 연구
A Numerical Study on the Characteristics of Heat Transfer and Pressure Drop of Horizontal Ground Heat Exchangers
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Heat transfer and pressure drop of horizontal heat exchangers with different configurations and installations numerically characterized. Three different heat exchangers were used and shaped as linear, wavy, and horizontal slinky, respectively. Installation depth was set from 0.5m to 3.0m and pipe spacing was ranged from 0.3m to 2.1m. The results showed that heat transfer rate and pressure drop were increased with the increase in the installation depth and the pipe spacing. The horizontal slinky heat exchanger carried more heat compared to others due to the greater effective heat transfer surface area per installation area. In terms of a ratio of heat transfer rate to pressure drop indicating the system efficiency, the linear heat exchanger performed better than others. On the other hand, the horizontal slinky heat exchanger was the most effective with respect to a ratio of heat transfer rate to installation cost.
Abstract
Heat transfer and pressure drop of horizontal heat exchangers with different configurations and installations numerically characterized. Three different heat exchangers were used and shaped as linear, wavy, and horizontal slinky, respectively. Installation depth was set from 0.5m to 3.0m and pipe spacing was ranged from 0.3m to 2.1m. The results showed that heat transfer rate and pressure drop were increased with the increase in the installation depth and the pipe spacing. The horizontal slinky heat exchanger carried more heat compared to others due to the greater effective heat transfer surface area per installation area. In terms of a ratio of heat transfer rate to pressure drop indicating the system efficiency, the linear heat exchanger performed better than others. On the other hand, the horizontal slinky heat exchanger was the most effective with respect to a ratio of heat transfer rate to installation cost.
참고문헌 (11)
- Qi, D, "Effects of ground heat exchangers with different connection configurations on the heating performance of GSHP systems", Geothermics, 80, pp.20~30 (2019)
- 백이, "온실내 잉여에너지 이용을 위한 지중 열교환 시스템의 상추 재배 효과", 한국기계기술학회지, 13(4), pp.71~76 (2011), 한국기계기술학회[DOI]
- 변재기, "리조트 건물의 연료전지 구동 지열원 복합열원 하이브리드 히트펌프 냉․난방 시스템 성능에 관한 해석적 연구", 한국기계기술학회지, 12(4), pp.25~31 (2010), 한국기계기술학회[DOI]
- Chong, C.S.A, "Comparing the thermal performance of horizontal slinky-loop and vertical slinkgy-loop heat exchangers", International Journal of Low-Carbon Technologies, 9, pp.250~255 (2014)
- Yoon, S, "Evaluation of thermal efficiency in different types of horizontal ground heat exchangers", Energy and Buildings, 105, pp.100~105 (2015)
- Fujii, H, "Numerical modeling of slinky-coil horizontal ground heat exchangers", Geothermics, 41, pp.55~62 (2012)
- Wiryadinata, S, "Technical and economic feasibility of unitary, horizontal ground- loop geothermal heat pumps for space conditioning in selected california climate zones", Energy and Buildings, 119, pp.164~172 (2016)
- 채호병, "수평형 지중열교환기를 이용한 건물일체형 지열시스템의 도입타당성 분석", 한국태양에너지학회 논문집, 35(1), pp.81~87 (2015), 한국태양에너지학회
- Habibi, M, "Evaluation and improvement of the thermal performance of different types of horizontal ground heat exchangers based on techno-economic analysis", Energy Conversion and Management, 171, pp.1177~1192 (2018)
- Kim, M, "Evaluation of geometric factors influencing thermal performance of horizontal spiral-coil ground heat exchangers", Applied Thermal Engineering, 144, pp.788~796 (2018)
- 박차식, "지열원 이용 열펌프 시스템 경제성 분석", 한국기계기술학회지, 12(4), pp.93~100 (2010), 한국기계기술학회[DOI]