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김종수,강정길,Kim, J.S.,Kang, J.K. 대한설비공학회 1991 설비공학 논문집 Vol.3 No.4
Recently, automotive air conditioning system manufacturers have been made a great efforts on the system compactness and high efficiency. This growing interest comes improvements in evaporator thermal performance, one of the most important factors affecting the performance of air conditioning system. In order to improve design of compact type evaporator, this study executes performs to develop a computer program for evaporator thermal performance prediction of automotive air conditioning system. The brief summaries of this study are as follows: 1) To predict the overall thermal performance of serpentine type evaporator, the new simulating method is developed. 2) The calculations are performed as functions of oil mass concentration and refrigerant two-phase distribution at inlet manifold of evaporator. 3) The validity of this simulating program is confirmed by comparing the predicted thermal performance results to experimental results of practical available evaporator. 4) Based on these results, suggestions are made to improve the thermal performance of evaporator.
김종수,조강래,Kim, J.S.,Cho, K.R. 대한설비공학회 1995 설비공학 논문집 Vol.7 No.2
The effects of duct inlet conditions on fan characteristics and upper wind velocity fields were investigated for two kinds of impellers. As the duct inlet condition, the relative positions between duct inlet and fan impeller and the size of baffle plate mounted on a duct inlet were selected. The 3-dimensional velocity components in flow fields were measured by a 5-holes pitot tube. From the results of measurements, it was found that the size of baffle plate scarecely effect on upper wind flow fields and characteristics of fan. It was also confirmed that the upper wind velocity distributions can be estimated by the potential flow field with large baffle plate at duct inlet.
김종수(J. S. Kim),하수정(S. J. Ha),손길재(K. J. Son) 한국동력기계공학회 2010 동력시스템공학회지 Vol.14 No.3
The purpose of this study is to develop a snow melting system using the pulsating heat pipe(PHP). The experimental apparatus is consisted of a PHP, a concrete structure, a constant water thermostatic bath and a flowmeter. The experiment was performed at the outdoor air temperature of -8℃ and inlet temperature of hot water of 75℃. PHP is the closed and non-loop type heat exchanger which is charging R-410A as an operating fluid. As experimental results, the temperature profile of vertical and horizontal orientation of concrete structure was measured with operating time. The heat flux of the snow melting was required more than 300 W/㎡. We confirmed that the snow melting system using the PHP was useful for anti-freezing road.
진동형 히트파이프와 열전소자를 이용한 차량용 냉 온장고에ㆍ관한 실험적 연구
김종수(J.S. Kim),전동환(D.H. Jeon),임용빈(Y.B. Im),장경희(K.H. Jang),이석준(S.J. Lee),김상현(S.H. Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
The purpose of this study is to develop a cooling or heating cabinet for a vehicles using a thermoelectric element combined with a pulsating heat pipe. The pulsating heat pipe used as a heat spreader and heat sink for a TEM. Heat was absorbed and dissipated by combined heat sinks equipped with fans. The experiment was performed for 6 thermoelectric module (6 A/15 V, size: 40×40×4 ㎜), varying design parameters of the heat pipe (inclination angle, working fluid charging ratio, etc.).