수치해석을 통한 정현파 형상 유로를 가지는 IGBT 히트싱크의 방열성능 분석

초록

This study analyzed the efficient heat loss emission of an insulated gate bipolar transistor as an element used in a power conversion device. The heat sinks of sinusoidal flow paths with different amplitude values were manufactured to analyze their heat dissipation performance. The effect of the operating conditions was assessed by controlling the temperature and the flow rate of the cooling water. This study was conducted by flow analysis using computational fluid dynamics, and the results were analyzed using ANSYS FLUENT. The heat discharge performance of the sinusoidal heat sink was effectively improved. It was higher by 17.3% ~ 23% than that of the heat sink with a straight flow path. Low inlet temperature and large flow rate of cooling water improved heat dissipation performance. However, the large flow rate of the cooling water and the amplitude of the sinusoidal shape affected the higher pressure drop , which induced a parasitic loss at the pump of cooling water. The rise in the amplitude of the sinusoidal channel caused a 1.2 ~ 2.4-fold increase in the pressure drop. The discharged heat per 1 Pa pressure drop was calculated to measure the efficiency of heat dissipation.

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