Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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An Experimental Study on the Thermal Performance Measurement of Vertical Borehole Heat Exchanger(BHE)

수직형 지열 열교환기(BHE)의 열성능 측정에 관한 실험적 연구

  • 임경빈 (한밭대학교 기계설계공학과) ;
  • 이상훈 (한밭대학교 기계설계공학과) ;
  • 성낙원 (한양대학교 대학원 기계공학과) ;
  • 이창희 (한양대학교 기계공학과)
  • Published : 2006.08.01
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Abstract

Knowledge of ground thermal properties is most important for the proper design of large BHE(borehole heat exchanger) systems. Thermal response tests with mobile measurement devices were first introduced in Sweden and USA in 1995. Thermal response tests have so far been used primarily for in insitu determination of design data for BHE systems, but also for evaluation of grout material, heat exchanger types and ground water effects. The main purpose has been to determine insitu values of effective ground thermal conductivity, including the effect of ground-water flow and natural convection in the boreholes. Test rig is set up on a small trailer, and contains a circulation pump, a heater, temperature sensors and a data logger for recording the temperature data. A constant heat power is injected into the borehole through the pipe system of test rig and the resulting temperature change in the borehole is recorded. The recorded temperature data are analysed with a line-source model, which gives the effective insitu values of rock thermal conductivity and borehole thermal resistance.

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References

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Cited by

  1. Feasibility Study of High-Efficiency Ground Heat Exchanger using Double U-tube through a Real-Scale Experiment vol.17, pp.4, 2017, https://doi.org/10.12813/kieae.2017.17.4.033