| Title |
Prediction and Experiment of Pressure Drop of R22, R407C and R410A on Design Conditions of Condenser |
| Keywords |
R22, R407C, R410A, Condenser ; 응축기 ; Design condition ; 설계조건 ; Fin-tube heat exchanger ; 휜-관 열교환기 ; Pressure drop ; 압력강하 |
| Abstract |
An experimental study on the refrigerant-side pressure drop of slit fin-tube heat exchanger has been carried out. A comparison was made between the predictions of previously proposed empirical correlations and experimental data for the pressure drop on design conditions of condenser in micro-fin tube for R22 and its alternatives, R407C(R32/125/134a, 23/25/52wt.%) and R410A(R32/125, 50/50wt.%). Experiments were carried out under the conditions of inlet refrigerant temperature of 60℃ and mass fluxes varying from 150 to 250 kg/m2s for R22, R407C and R410A. The inlet air conditions are dry bulb temperature of 35℃, relative humidity of 40% and air velocity varying from 0.68 to 1.43m/s. Experiments show that pressure drop for R410A and R407C were 17.8～20.2% and 5～6.8% lower than those of R22 respectively for the degree of subcooling of 5℃. For the mass fluxes of 200～250kg/m2s, the deviation between the experimental and predicted values for the pressure drop was less than ±20% for R22, R407C and R410A. |