| Title |
Study on Evaporation Pressure Drop of R-134a, R-407C, and R-410A in the Oblong Shell and Plate Heat Exchanger |
| Keywords |
Oblong shell and plate heat exchanger ; 오블롱 셀 플레이트 열교환기 ; Evaporation ; 증발 ; Pressure drop ; 압력강하 ; Vapor quality ; 건도 |
| Abstract |
This study reports pressure drops during evaporation for R-134a, R-407C(a mixture of 23wt% R-32, 25wt% R-125, and 52wt% R-134A) and R-410A(a mixture of 50 wt% R-32 and 50wt% R-125) in the oblong shell and plate heat exchanger. The effects of the mass fluxes, heat fluxes, refrigerant saturation temperatures and vapor quality of refrigerants on the measured data were explored in detail. The present data showed that pressure drops of all refrigerants increase with the vapor quality. At a higher mass flux, pressure drops are higher for the entire range of the vapor quality. A rise in the heat flux doesn't show significant effects on the pressure drops. Finally, at a higher saturation temperature the pressure drops are found to be lower. The pressure drops for R-407C were approximately 20% lower than those of R-134a. R-410A had 33% lower pressure drops than R-134a. Correlation is also provided for the measured pressure drops in terms of the friction factor. |