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초전도자석 시스템 응용을 위한 멀티-컨텍 커넥터의 열 발생 특성 평가
김명수,최연석,김동락,이윤아,Kim, M.S.,Choi, Y.S.,Kim, D.L.,Lee, Y.A. 한국초전도학회 2012 Progress in superconductivity Vol.14 No.2
Current leads are one of the important components for carrying the current to the coil in the superconducting magnet system. Heat leakage through the current lead is the major factor of entire heat load in the cryogenic system because current leads carry the current from room temperature to near 4 K, connecting thermally each other. Therefore, minimization heat load through current lead can reduce the operating temperature of superconducting magnet. The semi-retractable current lead, composed of multi-contact connector and HTS element, is one of good options. Comprehension of Multi-contact connector's structure, contact resistance and heat generation is essential for estimating heat generation in current leads. Multi-contact connector has several louvers inside of socket and the shape, number, size of louvers are different with the size of connector. Therefore contact area, current path and contact resistance are also different. In this study, the contact resistance in multi-contact connector is measured using the electrical power as a function of connector's size and temperature. Also, the unique correlation of electrical contact resistance is derived and heat generation is estimated for superconducting magnet application.
김명수(M.S. KIM),강희영(H.Y.Kang),김경현(K.H. Kim),고대권(D.K.Koh),안수길(S.K.Ahn) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
There were some papers for diesel engine performance tests using BDF, but we can't find any paper the temperature and soot concentration of Bio diesel flame. The flame temperature of diesel engines is high and change rapidly, an optical method for measurement of flame temperature is most effective. The two-color method regarding the visible wavelength radiation for the soot particles in flame was applied on Bio diesel flame in order to measuring flame temperature and soot concentration in a diesel engine.