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      저자 : 안근묵(Kun-Muk An) (검색결과 3 건)
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      • 개방형 지중열교환기의 블리딩 효과에 대한 실험적 고찰

        이상훈(Sang-Hoon Lee),박찬호(Chan-Ho Park),윤태일(Tae-Il Yoon),안근묵(Kun-Muk An),최용석(Yong-Seok Choe) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11

        Knowledge of ground thermal properties is most important for the proper design of BHE(borehole heat exchanger) systems. The configure type, pipe size and thermal performance of the BHE is highly dependent on the ground source heatpump system-efficiency and instruction cost. Thermal response tests with mobile measurement devices were developed for in-situ determination of design data for Standing Column Wells apply. The main purpose has been to determine in-situ values of effective ground thermal conductivity and thermal resistance, including the effect of ground-water flow and natural convection in the boreholes. A constant heating power is injected into the SCW through the test rig and the resulting temperature change in the SCW is recorded. The recorded temperature data are analysed with a line-source model, which gives the effective in-situ values of rock thermal conductivity and thermal resistance of SCW with bleeding. Standing column wells can be used as highly efficient ground heat exchangers in geothermal heat pump systems. This paper describes an experimentally bleeding effect with groundwater for standing column wells. An approach that utilizes an “enhanced” thermal conductivity to account for the natural groundwater movement, and explicitly increased 165.4% induced groundwater flow by “bleed,” is estimated.

      • 환수관 위치에 따른 스탠딩컬럼웰형 지중열교환기의 열응답테스트에 대한 실험적 연구

        이상훈(Sang-Hoon Lee),박찬호(Chan-Ho Park),윤태일(Tae-Il Yoon),안근묵(Kun-Muk An),최용석(Yong-Seok Choe) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7

        Thermal response tests with mobile measurement devices were developed for in-situ determination of design data for Standing Column Wells apply. The main purpose has been to determine in-situ values of effective ground thermal conductivity and thermal resistance, including the effect of ground-water flow and natural convection in the boreholes. A constant heating power is injected into the SCW through the test rig and the resulting temperature change in the SCW is recorded. The recorded temperature data are analysed with a line-source model, which gives the effective in-situ values of rock thermal conductivity and thermal resistance of SCW. This paper describes an experimentally depending on return pipe location with thermal performance for standing column wells. As a result, lower return pipe location case that is thermal conductivity increased about 6.56% and thermal resistance increased about 44.91% compare to upper return pipe location case.

      • 대구경 지중열교환기의 열성능측정에 관한 실험적 연구

        이상훈(Sang-Hoon Lee),윤태일(Tae-Il Yoon),안근묵(Kun-Muk An),하경호(Kyoung-Ho Ha) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6

        Knowledge of ground thermal properties is most important for the proper design of large scale BHE(borehole heat exchanger) systems. The type, pipe size and thermal performance of the BHE is highly dependent on the ground source heatpump system-efficiency and instruction cost. Thermal response tests with mobile measurement devices were developed primarily for in-situ determination of design data for large diameter BHE. The main purpose has been to determine in-situ values of effective ground thermal conductivity and thermal resistance, including the effect of ground-water flow and natural convection in the boreholes. The test rig is set up on a some trailer, and contains a circulation pump, a inline heater, temperature sensors, flow meter, power analysis meter and a data logger for recording the temperature, fluid flow data. A constant heat power is injected into the borehole through the U-pipes 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 of large diameter BHE.

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