高発熱CPUモジュール基板群の強制空気冷却 : 熱工学,内燃機関,動力など

概要

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This paper describes the forced air-cooling with two new concepts for CPU modules with high heat dissipation. One is slit jet flow system, the other is impingement duct flow system. This electronic equipment has multiple circuit boards (CPU modules), in which CPUs have high heat dissipation and SRAMs have low heat dissipation, loaded in three dimensions and in parallel. The slit jet flow system is very simple compared with the impingement flow system that has a complicated comb-style impingement jet flow system. Moreover, the slit jet flow system has an air duct with slit orifices and an axial fan upstream from the circuit boards. The impingement duct flow system is made of an air duct and a heat sink with fan. The heat sink with fan is attached on CPU. The impingement duct flow system has slit orifices and an axial fan upstream or downstream from the circuit boards. Using the electronic equipment with the slit jet flow system or the impingement duct flow system, the increase in external thermal resistance in the CPUs and the SRAMs was measured after stopping one of the cooling fans or CPU's micro cooling fan. This result shows that the slit jet system and the impingement duct flow system have good cooling performance and redundancy.
一般社団法人日本機械学会の論文
2001-04-25