http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
홍용주(Yong-Ju Hong),박성제(Seong-Je Park),고득용(Deuk-Yong Koh),최영돈(Young-Don Choi) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
As the component density of electronics increases due to smaller line width, so does the power dissipation. Microscale Joule-Thomson refrigerator has gained attention in the cooling of electronics due to the its capability of cooling of small spot. A typical microscale JT refrigerator consists of four main compontents; inlet and outlet ports, counter flow heat exchanger, capillary channel and evaporator. The counter flow heat exchanger and capillary channel have serpentine microchannels. Cooling power is generated by the isenthalpic expansion of a gas through the capillary channel, and the performance is kept by counter flow heat exchanger. In this study, Thermodynamic simulations, which are based on the simple Linde-Hampson system, was undertaken to use it to design a microscale JT refrigerator. The results shows the effect of inlet pressure on the cooling capacity. effectiveness, mass flow rate, evaporator temperature.
홍용주(Yong-Ju Hong),박성제(Seong-Je Park),최영돈(Young-Don Choi) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Miniature Joule-Thomson cryocoolers have been widely used for rapid cooling of infrared detectors, probes of cryosurgery, thermal cameras, missile homing head and guidance system, due to their special features of simple configuration, compact structure and rapid cool-down characteristics. The cool-down time, the temperature at the cold end, the running time and the gas consumption are the important indicators of the performance of the J-T cryocooler. In this study, the initial cool-down stages of the J-T cryocooler were investigated by numerical simulations. The results show the effects of the volume of gas bottle on the cool-down time and the temperature at the cold end and the gas consumptions.
홍용주(Yong-Ju Hong),박성제(Seong-Je Park),최영돈(Young-Don Choi) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Miniature Joule-Thomson cryocoolers have been widely used for rapid cooling of infrared detectors, probes of cryosurgery, thermal cameras, missile homing head and guidance system, due to their special features of simple configuration, compact structure and rapid cool-down characteristics. The cool-down time, the temperature at the cold end, the running time and the gas consumption are the important indicators of the performance of the J-T cryocooler. In this study, the initial cool-down stages of the J-T cryocooler were investigated by numerical simulations. The results show the effects of the initial charging pressures of gas on the cool-down time and the temperature at the cold end and the gas consumptions.
홍용주(Yong-Ju Hong),박성제(Seong-Je Park),김효봉(Hyo-Bong Kim),최영돈(Young-Don Choi) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In this study, the cool-down characteristics of a miniature J-T refrigerator with the pressurized bottle, which has the different initial pressures of nitrogen gas and argon, were investigated by experiment. To analyze the cool-down characteristics of the refrigerator, the supply and exhaust pressure, the temperatures on the surface of the cryostat, and the mass flow rate were measured simultaneously. The results show the effect of the supply pressure on the performance of the refrigerator. The influence of the supply pressure and the temperature on the mass flow rate during the cool-down stage is discussed in details.
홍용주(Yong-Ju Hong),박성제(Seong-Je Park),김효봉(Hyo-Bong Kim),김양훈(Yang-Hoon Kim),최영돈(Young-Don Choi) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
The Stirling refrigerators have been widely used for the cooling of the infrared detector and HTS to the cryogenic temperature. The Stirling refrigerator with the rotary compressor are applicable to the cooling device for the compact mobile thermal imaging system, because the refrigerators have the compact structure and light weight. The typical performance factors of the Stirling refrigerator are the cool-down time, cooling capacity at the desired temperature and the input power. And the above performance factors are depends on the thermal insulation characteristics of the Dewar. In this study, the steady thermal load of the Dewar and the performance of the Stirling refrigerator were measured. The results show the dependency of the input power and the charging pressure on the performance of the refrigerator.