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예측 시뮬레이션 프로그램을 이용한 이상 밀폐 열사이펀 분석
최동녁(Dongnyeok Choi),윤경은(Kyungeun Yoon),전재영(Jaeyoung Jeon),황원기(Won-Ki Hwang),이권영(Kwon-Yeong Lee) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
A two-phase closed thermosyphon (TPCT) is a closed tube which transfers heat by phase changes of working fluid. In this paper, a simulation program is investigated to design TPCT, and de-ionized water is used as a working fluid. The simulation program implemented with MATLAB, and it is evaluated by Kamyar’s (2013) research. The simulation results are presented, which show temperature distribution, boiling and condensation heat transfer coefficient, and total thermal resistance considering de-ionized water as a working fluid. The temperature error between experimental and simulation results were 27%, 14%, 6% on each of evaporator, adiabatic, and condenser of TPCT. Heat transfer coefficients of simulation results were two times bigger than the experimental results. So total thermal resistance of simulation results were two times smaller than experimental results. This simulation program will be used to design and predict the performance of the new TPCT. This new designed TPCT is made of copper tube and its inside and outside diameter are 10.9 mm, and 12.7 mm each. It consists of three parts, evaporator, adiabatic, condenser and its length are 800 mm, 200 mm, and 400 mm each. The input heat transfer rates are 100 W to 5000 W. Later, this simulation program will be developed reflecting the characteristics of various working fluids.