한국지열·수열에너지학회논문집 (Journal of the Korean Society for Geothermal and Hydrothermal Energy)
- 제1권2호
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- Pages.1-6
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- 2005
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- 2799-4783(pISSN)
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- 2799-4805(eISSN)
지하수 열원 열펌프 개발을 위한 지하수 온도의 변화 특성 연구
A Study on the Variation of Ground Water Temperature for Development of Ground Water Source Heat Pump
- Nam Hyun Kyu (Thermal/Flow Control Research Center, KIST) ;
- Kim Youngil (School of Architecture, Seoul National Univ. of Technology) ;
- Seo Joung Ah (Department of Mechanical Engineering, Sejong University) ;
- Shin Younggy (Department of Mechanical Engineering, Sejong University)
- 발행 : 2005.12.01
초록
Ground water source heat pumps are clean, energy-efficient and environment-friendly systems for cooling and heating. Although the initial cost of ground water source heat pump system is higher than that of air source, it is now widely accepted as an economical system since the installation cost can be returned within a short period of time due to its high efficiency. In a ground water source heat pump system, the variation of the ground water temperature is an important factor that influences the system performance. In this study, variation of the ground water temperature of a single well system is studied experimentally for various operating conditions. When ground water flow exists in the underground, the returned water exchanges heat efficiently with the ground and the temperature of the ground water remains nearly constant. Hence the short circuit problem is minimized. If an active flow of ground water flow exists in the underground, a singe well heat pumps system will be free of short circuit problem and can operate with high performance.