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• W2360390412 abstract "Dept. of Earth and Environmental Sciences, Andong National UniversityReceived 23 February 2015; received in revised form 2 March 2015; accepted 6 March 2015본 연구는 지열시스템 열교환 효율의 개선방안을 모색하기 위한 것으로 금속재질의 열교환기인 동관 및 스테인레스관과 기존 지열시스템에 많이 적용되는 PE관을 이용하여 지열열교환기의 재질에 따른 열전달 효율을 비교 분석하였다. 또한 지하매질의 지하수에 포함되어 있는 지하수열을 동시 활용할 경우의 열전달 효율 변화를 평가하고 그 적용성을 검토하였다. 열교환기 내의 유속, 유량 및 열교환기의 구경을 조절함으로써 열교환기의 재질에 따른 열전달 효율을 평가 후현장실증시험 설계인자를 도출하였다. 열교환 효율과 유효 열전도도는 현장 열전달 효율 시험 및 열응답 시험을 통해 변화양상을 분석하였다. 분석결과 금속재질이 PE관에 비해 높은 열전달 효율을 보였으며, 유량에서의 구경증대에 따른 열전달효율은 크지 않았으나 유속에서의 구경증대에 따른 열전달효율은 높아지는 것을 확인하였다.주요어 : 열교환기 , 열효율 , 열전도도 , 금속The purpose of this study is to analyze and compare the heat transfer efficiency of using copper pipe, stainlesspipe and traditional PE pipe commonly used for geothermal heat exchanger, with aims at seeking improved meth-ods. In addition, the varying efficiency of heat transfer from ground heat and groundwater heat was assessed and itsapplicability was discussed. Design parameters for empirical field study were derived by controlling flow rate,velocity and caliber of pipes of the heat exchanger after the thermal efficiency of the heat exchanger material wasevaluated. The heat exchange efficiency and effective thermal conductivity were measured with changing patternthrough field thermal efficiency and thermal response test. Experimental results show that the metal materialshowed higher heat transfer efficiency than the PE pipe. Although the heat transfer efficiency was not high with theincrease of the pipe diameter in the flow rate, it was high with the increase of the pipe diameter in the velocity.Key words: heat exchanger, heat efficiency, heat conductivity, metal" @default.
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• W2360390412 date "2015-03-31" @default.
• W2360390412 modified "2023-09-22" @default.
• W2360390412 title "Study on Efficiency for Underground Heat Transfer of Metal Heat Exchanger" @default.
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• W2360390412 doi "https://doi.org/10.9720/kseg.2015.1.131" @default.
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