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원성필,김민수,김동섭,노승탁,Won, S.P.,Kim, M.S.,Kim, T.S.,Ro, S.T. 대한설비공학회 1990 설비공학 논문집 Vol.2 No.2
A theoretical cycle analysis has been performed for a basic heat pump, charged with non-azeotropic refrigerant mixtures, R22/R114 and R13B1/R152a. At first, a procedure is introduced to calculate thermodynamic properties simply and correctly, and the advantages of using refrigerant mixtures are discussed through the cycle analysis. It is shown that by using refrigerant mixtures in the heat pump, several improvements can be made. In comparison with conventional pure refrigerants, the application of refrigerant mixtures results in high reliabilities caused by the extension of the application limit, energetic improvements, and a continuous capacity control. From generalizing various results, the optimum compositions in refrigerant mixtures are also determined. The 30%/70% and 40%/60% compositions are selected for R22/R114 and R13B1/R152a, respectively.
오상한(S.H.Oh),이창원(C.W.Lee),원성필(S.P.Won) 한국자동차공학회 1996 한국 자동차공학회논문집 Vol.4 No.2
The computer simulation program that calculates the transient heat load transferred to a passenger vehicle has ben developed. Method for modeling mathematically various kinds of the heat load was presented and the derived equations were solved numerically. To find out the accuracy of the simulation program, the correlation of experimental and analytical results was demonstrated. By using this program, the typical characteristics about temperature distribution and instantaneous or total heat load for each part of the vehicle were predicted and analyzed, according to the change of vehicle body color, material of glass. air-conditioning capacity. driving direction. and speed. Under a steady-state condition, the ratios of the heat load, resulting from vehicle body, glass, and interior part, were 35%, 29%, and 36%, respectively.
오상한(S.H. Oh),이창원(C.W.Lee),원성필(S.P.Won) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_1
The computer simulation program that calculates the transient heat load transferred to a passenger vehicle has been developed Method for modelling mathematically various kinds of the heat load was presented and the derived equations were solved numerically. To find out the accuracy of the simulation program, the correlation of experimental and analytical results was demonstrated. By using this program, the typical characteristics about temperature distribution and instantaneous or total heat load for each part of the vehicle were predicted and analyzed, according to the change of vehicle body color, material of glass, air-conditioning capacity, driving direction, and speed Under a steady-state condition, the ratios of the heat load resulting from vehicle body, glass, and interior part, were 29%, 30%, and 41%, respectively.<br/>
오상한,이창원,원성필,Oh, S.H.,Lee, C.W.,Won, S.P. 대한설비공학회 1997 설비공학 논문집 Vol.9 No.3
The fundamental theory and technical approach to aid design and development of an automotive air-conditioning system are presented. The evaluation methods for transient cooling load transferred to a passenger compartment and simulation of automotive air-conditioning components are outlined. The structure of the computer program, the experiemntal correlations, and the simulation results are also included. The total cooling load of the white-colored car is reduced upto 5% for that of the black-colored car when the car is running. Using the infrared reflectance glass, we can also obtain 5% reduction of the total cooling load for the common glass.
김민수,김동섭,원성필,노승탁,Kim, M.S.,Kim, T.S.,Won, S.P.,Ro, S.T. 대한설비공학회 1990 설비공학 논문집 Vol.2 No.3
Studies on the performance of a heat pump using non-azeotropic refrigerant mixtures are done. In order to estimate the thermodynamic properties for the selected non-azeotropic refrigerant mixtures including R22/R152a, R22/R142b, R22/R114 and R13B1/R152a, Peng-Robinson equation of state is adopted. The pressure-enthalpy diagram and the temperature-entropy diagram are plotted for each refrigerant mixture. Considerations on the capacity modulation for the heat pump system using refrigerant mixtures are taken into. Results show that when the heating load varies, the possibility for the capacity modulation is found in the heat pump system using a compressor with constant volume flow rate. Under a constant heating capacity condition in the heat pump system, the coefficient of performance increases when the refrigerant mixtures are used. The volume flow rate decreases as the mass fraction of lower boiler increases in this case.