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고득용,최헌오,김효봉,Go, Deuk-Yong,Choe, Heon-O,Kim, Hyo-Bong 한국기계연구원 1989 기계연구원소보 Vol.19 No.-
Heat transfer phenomena of solidification process of the phase change material within cylindrical can is studied experimentally. N-Eicosane paraffin wax is used for phase change material and its melting temperature is 309.8 K. In order to achieve higher heat transfer rate of latent heat storage apparatus, fins in made of copper are used in the cylindrical can. If there are fins in cylindrical can, we can know that the inward latent heat energy in paraffin can be effectively transfered to cooling water than if finless.
77K Inertance tube 맥동관 극저온 냉동기에 관한 연구
박성제,고득용,김효봉,Park, Seong-Je,Go, Deuk-Yong,Kim, Hyo-Bong 한국기계연구원 1999 硏究論文集 Vol.29 No.-
The experimental results of the 17K inertance tube pulse tube cryocooler for cooling cryosensors are presented in this paper. In prototype experiments, linear compressor is driven by linear motor, and inertance tubes are inserted between one liter reservoir and pulse tube. Design of the inertance tube pulse tube cryo-cooler is conducted by ARCOPTR program of NASA Ames Research Center. To find optimal conditions of inertance tube pulse tube cryocooler, no load temperature and refrigeration capacity according to the variations of inertance tube volume, reservoir volume and charging pressure are measured. and the cool down and load characteristics at the particular conditions are presented. As the representative results, no load temperature of the cold end is 52.7K and refrigeration capacity is 5W at 72K..