| Title |
Effects of the Temperature Glide and Superheat of R407C on the Performance of Evaporator |
| Keywords |
R407C, Temperature glide ; 온도구배 ; Superheat ; 과열도 ; Evaporation ; 증발 ; Pressure drop ; 압력강하 |
| Abstract |
R407C is considered as an alternative refrigerant of R22 for air conditioners. An experiment was carried out to investigate the characteristics of the evaporation heat transfer and pressure drop for refrigerant R407C flowing in a fin-and-tube heat exchanger used for commercial air-conditioning unit. The experimental data were useful in analyze the effects of the temperature glide and superheat for R407C. Test were conducted at the conditions of inlet refrigerant evaporation temperature of 7℃, inlet air relative humidity of 50%, and refrigerant mass fluxes varying from 150 to 250kg/m2s. Representative results show that the heat exchanger performance for R407C evaporation is significantly affected by the change of the flow pattern from two-phase to super-heated vapor flow. |