Based on the heat transfer analysis of two-phase zone augmentation technique employed in multiple parallel-pass (MPP) condenser

visualization and performance tests are employed to compare and evaluate the performance of MPP condenser by referencing a same-sized parallel flow(PF) condenser as a baseline sample.Visual observation by using a high-speed camera indicates that a more uniform refrigerant quality entering the next cooling pass can be achieved in MPP condenser because superheat vapor through a pass-through hole on flow distributor directly injects into a liquid -vapor zone in a header tube.In addition

analytical and test results show MPP condenser

being designed to enlarge two-phase condensing zone

is able to improve cooling performance as high as 9.6% while its refrigerant mass flow increases as high as 13.34% when comparing with a benchmark PF condenser.