| Title |
Effects on Refrigerant Maldistribution on the Performance of Evaporator |
| Keywords |
Evaporator ; 증발기 ; Refrigerant maldistribution ; 냉매의 불균일한 분배 ; Superheat ; 과열도 ; T-type distributor ; T형 분배기 ; Tube-by-tube method ; 관순법 |
| Abstract |
An experimental investigation was conducted to study two-phase flow distribution in a T-type distributor of slit fin-and-tube heat exchanger using R22. A comparison was made between the predictions by previously proposed tube-by-tube method and experimental data for the heat transfer rate of evaporator. Experiments were carried out under the conditions of saturation temperature of 5℃ and mass flow rate varying from 0.6 to 1.2kg/min. The inlet air has dry bulb temperature of 27℃, relative humidity of 50% and air velocity varying from 0.63 to 1.71m/s. Experiment show that air velocity increased by 85.2% is need for T-type distributor with four outlet branches than that of two outlet branches under the superheat of 5℃, which resulted in air-side pressure drop increase of 130% for T-type distributor with four outlet branches as compared to two outlet branches. |