| Title |
Analysis of the Gravity Effect on the Distribution of Refrigerant Flow in a Multi-circuit Condenser |
| Keywords |
Condenser ; 응축기 ; Gravity effect ; 중력효과 ; Distribution of refrigerant flow ; 냉매유량분포 ; Circuit of refrigerant flow ; 냉매흐름회로 |
| Abstract |
The method to consider gravity effect on the performance of a condenser is developed, and a simple condenser having ‘nU’ type two circuits is analyzed. Each circuit has the same length and inlet air-side operational conditions. The only difference between two circuits is the direction of refrigerant flow, which is exactly opposite each other between the upper ‘n’ type circuit and the lower ‘U’ type circuit. It is shown that the gravity makes the distribution of refrigerant flow uneven in the two circuits at lower refrigerant flow rates; heat transfer rate also becomes uneven. Moreover, much of the refrigerant exists as liquid state in the circuit having low refrigerant flow rate, which will make the cycle balance unstable in the refrigeration cycle system like a heat pump. |