| Title |
Effects of Fin Conduction and Superheat Unbalance on the Performance of an Evaporator |
| Keywords |
Superheat ; 과열도 ; Multi-path ; 다중패스 ; Fin conduction ; 핀-전도 ; Cutting- evaporator ; 커팅 증발기 ; Non-cutting evaporator ; 비커팅 증발기 |
| Abstract |
An experimental investigation was executed to determine the capacity degradation due to fin conduction and non-uniform refrigerant distribution in a multi-path evaporator with cross-counter flow. The finned-tube evaporator, which had a three-path and three-depth-row, was tested by controlling inlet quality, exit pressure, and exit superheat for each refrigerant path. The capacity reduction due to superheat unbalance between each path was as much as 25% for non-cutting evaporator, even when the overall evaporator superheat was kept at a target value of 5.6℃. It indicates that the internal heat transfer within the evaporator assembly causes the partial capacity drop. The capacity of cutting-evaporator with respect to non-cutting evaporator was enhanced according to the increment of air flow rate when superheat or superheat unbalance increased. |