EXPERIMENTAL INVESTIGATIONS ON PERFORMANCE OF EVAPORATOR AND CONDENSER OF R410A INSIDE A NOVEL BRAZED PLATE HEAT EXCHANGER

摘要

A novel technology on plate heat exchanger was introduced. Heat transfer and pressure loss wereinvestigated with water flow through dimple plate and herringbone plate as well as R410A flow boiling andcondensing. Experiments on three kinds of plate patterns (one herringbone plate, one normal dimple plateand one novel dimple plate) were performed based on given heat flux (6~14 kW/m~2), comparatively. Testresults with single phase flow and condenser showed that two given dimple plates have high heat transferefficiency with low pressure loss under same conditions and capacity due to unique channel and cell design.For evaporator application, the normal dimple plate becomes worse due to poor refrigerant distribution overplate surface compared with herringbone plate. However, the unique dimple plate achieved extremely goodperformance with low pressure loss due to good distribution and high efficiency of heat transfer cell. Inaddition, the dimple plate can provide more flexible and specified design according to application conditionfrom customers.