지중온도 경사를 이용한 효율적 지중에너지 이용 방안에 관한 연구A Study on Effective Energy Use of the Open Type Ground Heat ExchangerUsing Underground Temperature Gradient
- Other Titles
- A Study on Effective Energy Use of the Open Type Ground Heat ExchangerUsing Underground Temperature Gradient
- Authors
- 류형규; 정민호; 이병석; 류호준; 최현준; 최항석
- Issue Date
- 2014
- Publisher
- 대한설비공학회
- Keywords
- Open type ground heat exchanger(개방형 지중열교환기); SCW(스탠딩컬럼웰); LMTD(대수평균온도차); EWT(히트펌프 입구온도); LWT(히트펌프 출구온도); TRT(열응답 시험)
- Citation
- 설비공학 논문집, v.26, no.9, pp.401 - 408
- Indexed
- KCI
- Journal Title
- 설비공학 논문집
- Volume
- 26
- Number
- 9
- Start Page
- 401
- End Page
- 408
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/100078
- DOI
- 10.6110/KJACR.2014.26.9.401
- ISSN
- 1229-6422
- Abstract
- This paper proposes an optimum operation method for open type ground heat exchangers. A series of TRTs and artificial heating/cooling operations were carried out while monitoring temperature in the hole of SCW. The ground temperature naturally increases with depth, but a switch between the cooling/heating mode results in a change in the distribution of ground temperature. The effect of the mode change was evaluated by performing LMTD and COMSOL multiphysics analysis for a reduced model with the depth of 150 m. As a result, in the cooling mode, the upstream operation is more efficient than the downstream operation and reduces EWT by 2.26℃. On the other hand, in the heating mode, the downstream operation is advantageous over the upstream operation and increases EWT by 3.19℃. The merit of the optimum operation will be enhanced for the typical dimension of SCW with a depth of 400~500 m. In the future, an open type ground heat exchanger system adopting the optimum operation with variation in the ground temperature will be used in practice.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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