Optimization of Heat-Sink Cooling Structure in EAST with Hydraulic Expansion Technique

Considering utilization of the original chromium-bronze material,two processing techniques including hydraulic expansion and high temperature vacuum welding were proposed for the optimization of heat-sink structure in EAST.The heat transfer performance of heat-sink with or without cooling tube was calculated and different types of connection between tube and heat-sink were compared by conducting a special test.It is shown from numerical analysis that the diameter of heat-sink channel can be reduced from 12 mm to 10 mm.Compared with the original sample,the thermal contact resistance between tube and heat-sink for welding sample can reduce the heat transfer performance by 10%,while by 20%for the hydraulic expansion sample.However, the welding technique is more complicated and expensive than hydraulic expansion technique. Both the processing technique and the heat transfer performance of heat-sink prototype should be further considered for the optimization of heat-sink structure in EAST.