http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
중온 온도 범위에서 응축부 확대에 따른 편조윅 히트파이프의 성능 비교 연구
정원복(Chung W. B),부준홍(Boo J. H),곽희열(Kwak H. Y) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
For heat pipes with ethanol as a working fluid operating in a relatively high condenser temperature range<br/> of 80 to 150℃, an adequate wick geometry must be provided to ensure an operation against unfavorable<br/> operation condition. A woven-wire wick were selected for the test of a heat pipe with long evaporator of 1.5 m<br/> and short condenser of 0.05 m which may be used for an evacuated solar collector. To provide a baseline<br/> performance of the same operating condition, a thermosyphon of identical outer dimension was also tested<br/> and compared. The woven-wire wick heat pipe proved to be most excellent from the viewpoint of thermal<br/> resistance during steady-state operation.
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.
부준홍,정원복,곽희열 한국 항공대학교 항공산업기술연구소 2001 航空宇宙産業技術硏究所 硏究誌 Vol.11 No.-
A slab-wick heat pipe was fabricated and tested for applications where the condenser temperature in the range of 80 to 120℃. The pipe material in the evaporator section and adiabatic section was 9.53 mm O.D. copper tube and 25.4 mm O.D. copper tube was adapted in condenser section. The working fluids were ethanol and distilled water. The total length of the heat pipe was 1.6 m in which evaporator section was 1500 mm and the condenser was 50 mm. The slab was a composite wick structure fabricated with stainless steel wire screens. The temperature of coolant and inclination angle were varied with applied thermal load. The result of experiment was compared with a heat pipe having same diameters through the whole length. The maximum thermal load was 160 W in and 480 W the case of ethanol and water, respectively. This was 2.4 times of ordinary 9.53 mm O.D heat pipe. The thermal performance of the slab-wick heat pipe was analysed and discussed in terms of maximum thermal load and thermal resistance against coolant temperature and thermal load.