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全哲昊,徐海成 동아대학교 공과대학 부설 한국자원개발연구소 1989 硏究報告 Vol.13 No.2
Heat transfer charcteristics at the internally finned condenser and in case of no finned condenser in rotating heat pipe been numerically and experimentally studied. The results of numerical and experimental showed good agreement and it was able to predict to the performance of a rotating heat pipes. Heat transfer ratio of a internally finned condenser and no finned condenser was increased largely by increasing fin numbers but it had no influenced upon changing fin half angle and fin height. By decreasing condenser radius and increasing saturation temperature, heat transfer ration was rapidly increased.
수평식 셸-튜브형 잠열축열조의 축열 및 방열특성에 관한 실험적 연구
권영만,서해성,모정하,Kwon, Young-Man,Seo, Hye-Sung,Moh, Jung-Ha 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.1
An experimental study has been carried out in order to investigate the heat storage characteristics for a latent heat storage tank with horizontal shell and tube type. The heat exchanger consisted of horizontal cylindrical capsules with a staggered tube bank layout. Based on the obtained data, the effects of flow rate and inlet fluid temperature on the melting time and heat storage rates were examined. It is found that the melting time decreased with increase of the flow rate and the inlet temperature. Results also show that at the initial stage of heat transfer the heat storage rate represents the maximum value and rapidly decreases.
SiO₂ Wick을 使用한 Heat Pipe의 傳熱特性에 관한 硏究
全哲昊,徐海成 동아대학교 공과대학 부설 한국자원개발연구소 1985 硏究報告 Vol.9 No.1
Cu heat pipe with SiO₂ sintered wicks type capillary structure and distilled water as the working fluid was studied in the heat transfer rate range of 60W to 180W. Analysis resistances are considered in the pipe wall at the condenser and evaporator, in the fluid gap between pipe wall and capillary structure, at liquid vapor interface, and in the vapor region. The results are as follows. 1) Thermal resistance of wick had larger than any other thermal resistance and thermal resistance at pipe wall, interface, vapor region can usually be neglected 2) Increase the heat transfer rate and vapor temperature, temperature difference of evaporator were increased but temperature difference of vapor path were not changed.