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수직밀폐형 지중열교환기의 회로 과도해석 상사모델 개발Development of an Electric Circuit Transient Analogy Model in a Vertical Closed Loop Ground Heat Exchanger
- Other Titles
- Development of an Electric Circuit Transient Analogy Model in a Vertical Closed Loop Ground Heat Exchanger
- Issue Date
- 2012
- Publisher
- 대한설비공학회
- Keywords
- Analogy(상사); Electric circuit(전기회로); Ground heat exchanger(지중열교환기); Thermal response(열응답); Transient analysis(과도해석); Vertical closed loop(수직밀폐형)
- Citation
- 설비공학 논문집, v.24, no.4, pp.306 - 314
- Indexed
- KCI
- Journal Title
- 설비공학 논문집
- Volume
- 24
- Number
- 4
- Start Page
- 306
- End Page
- 314
- ISSN
- 1229-6422
- Abstract
- Several numerical or analytical models have been proposed to analyze the thermal response of vertical ground heat exchangers (GHEX). However, most models are valid only after several hours of operation since they neglect the heat capacity of the borehole. Recently, the short time response of the GHEX became important in system simulation to improve efficiency. In this paper, a simple new method to evaluate the short time response of the GHEX by using an analogy model of electric circuit transient analysis was presented. The new transient heat exchanger model adopting the concept of thermal capacitance of the borehole as well as the steady-state thermal resistance showed the transient thermal resistance of the borehole. The model was validated by in-situ thermal response test and then compared with the DST model of the TRNSYS program.
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