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논문 기본 정보

자료유형
학술저널
저자정보
노정근 (충북대학교) 연광석 (충북대학교) 송헌 (홍익대학교)
저널정보
한국태양에너지학회 한국태양에너지학회 논문집 한국태양에너지학회 논문집 제31권 제4호
발행연도
2011.8
수록면
80 - 86 (7page)

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초록· 키워드

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Investigation of the effective soil thermal conductivity(κ) is the first step in designing the ground loop heat exchanger(borehole) of a geothermal heat pump system. Another important factor is the borehole thermal resistance(R<SUB>b</SUB>). Thermal response tests offer a good method to determine the ground thermal properties for the total heat transport in the ground. This is done by supplying a constant heat power into a borehole heat exchanger. There are two methods to supply a constant heat power. One is to employ the electricity provided by Korea Electric Power Corporation(KEPCO). The other is to use electricity generated by a generator. In this study, the power supply regulation was found to reduce when the electricity generated by the generator was used. This is because the generator evaluated with the power supply characteristically reduces the power supply regulation between an overload and a complex using. But it sometimes occurs a power supply regulation in In-situ thermal response test. In this case getting of κ, R<SUB>b</SUB> requires delay times and restored normal state. However, the effect of the delay times and restored normal state on the soil thermal conductivity and borehole thermal resistance is very small. Therefore it is possible to use a generally accepted delay times and restored normal state in the analysis. In this work, it is also shown that an acceptable range Δκ, ΔRb, for normal state and regulation state might be approximately 0.01-0.16 W/mㆍk, and -0.004-0.007mㆍK/ W, respectively. Thus, restored normal state of power supply regulation is valuable to recommend.

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Abstract
1. 서론
2. 선형열원법
3. 열응답 시험 및 해석
4. 선형열원법에 의한 κ 값 비교
5. 선형열원법에 의한 Rb 값 비교
6. 부하변동 발생 시점에 따른 κ 값, Rb 값 변화율
7. 결론
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UCI(KEPA) : I410-ECN-0101-2013-563-000792708