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Isothermal Heat Spreader 냉각모듈의 성능에 관한 연구
김동권(D. K. Kim),천만석(M. S. Chun),김광수(K. S. Kim),원명희(M. H. Woo),김흥배(H. B. Kim) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.9
Temperature increase of electronic devices due to the increase of heat density causes the decrease of device life time and do harm severely. So decrease of device temperature is the key technology in design process. Traditional heat sink simply cools heating device, but Isothermal Heat Spreader(IHS) plays different function. Isothermal Heat Spreader cannot cool by itself, just spread heat evenly over total surface of Isothermal Heat Spreader. The profits of isothermal Heat Spreader are much varied. Spreading heat means averaging temperature, and averaging means decrease the highest temperature to the average temperature. In fact, damage of devices is due to not the average temperature but the highest temperature of the device. So using Isothermal Heat Spreader reduce the possibility of accident. And heat sink using Isothermal Heat Spreader will have far better performance than traditional heat sink.
중온 응축부 온도 범위에서 편조윅 및 슬랩윅을 갖는 히트파이프의 성능 비교 연구
정원복(Chung W. B),부준홍(Boo J. H),곽희열(Kwak H. Y),천만석(Chun M. S) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.9
A special working condition of elevated condenser temperature may arise in such case as a solar collector for a medium temperature range. For this case, a heat pipe must be designed properly such that it may transfer a certain amount of heat to the abnormally hot condenser from the evaporator of which the relative temperature potential is not so high as in common applications. In addition, the working fluid properties become unfavorable due to an elevated temperature of the whole heat pipe. Among many wick structure candidates for this application, a slab wick and a woven-wire wick were selected based on the promising performance data published previously. The thermal performance of heat pipes made of these two wick types were or investigated for comparison. In addition, the performance of a thermosyphon in the same working condition was also investigated for a reference in the comparison study. The typical range of condenser wall temperature was set between 80 and 120 ℃. The heat pipes were made of 9.53 ㎜ dia. copper tubes. The experimental data of these heat pipes were analysed and discussed in terms of thermal resistance against thermal load and coolant temperature.