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- W1576645767 abstract "The performance of U-tube ground heat exchanger for geothermal heat pump systems depends on the thermal properties of the soil, as well as grout or backfill materials in the borehole. In-situ tests provide a means of estimating some of these properties. In this study, in-situ thermal response tests were completed on two vertical boreholes, 130 m deep with 62 ㎜ diameter high density polyethylene U-tubes. The tests were conducted by adding a monitored amount of heat to water over a 17~18 hour period for each vertical boreholes. By monitoring the water temperatures entering and exiting the loop and heat load, overall thermal conductivity values of grout/soil formation were determined. Two parameter estimation models for evaluation of thermal response test data were compared when applied on the same temperature response data. One model is based on line-source theory and the other is a numerical one-dimensional finite difference model. The average thermal conductivity deviation between measured data and these models is of the magnitude 1% to 5%." @default.
- W1576645767 created "2016-06-24" @default.
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- W1576645767 date "2005-02-01" @default.
- W1576645767 modified "2023-09-23" @default.
- W1576645767 title "열응답 시험과 변수 평가 모델을 이용한 그라우트 / 토양 혼합층의 열전도도 산정" @default.
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