Study of the Influence of Liquid Cooling Heat Sink Plate on the Accuracy of a Certain Thermal Resistance Test System
As a mainstream method for testing contact thermal resistance,heat flux method is wide-ly used in various colleges and laboratories at home and abroad.The construction of various types of similar test platform is mainly based on the experimental equipment in the American national standard ASTM D5470-06.This type of equipment often uses constant temperature water tank and heat sink plate as a low temperature end cooling source,in which the heat sink plate is taken as a system heat sink end directly contacting with the test body and performing heat conduction,and its good heat exchange capacity & temperature uniformity performance have a greater impact on the measurement accuracy of the thermal resistance test system.In order to improve the measure-ment performance of the thermal resistance test system,a new type of heat sink plate with low temperature is designed during the research and development of a thermal resistance test system,and its flow channel configuration is optimized.In this paper,the heat transfer characteristics of the heat sink plate are numerically calculated.By analyzing the system error of the test system,disas-sembling the error factor and conducting numerical calculation,the numerical effects of the flow path design of the heat sink plate on the temperature equalization of the test body,error factor and total error of the system are quantified.The research results show that under the condition of liquid inlet flow of heat sink plate 3 L/min and heat source power 200 W,the optimized heat sink plate increases 38.7％in temperature equalization and decreases 13.9％in system error compared with the traditional heat sink plate.
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