摘要
设计一种用相变散热来扩散热量的热管基板模块,通过热板瞬态性能实验发现热板蒸发端芯体和冷凝端芯体温度降分别占热管总温度降的86%和13%,关闭比启动时温度分布更均匀。热板达到稳态的时间主要取决于传热系数,传热系数越大,达到稳态的时间越短。蒸发端芯体是主要热阻,热板启动和关闭时蒸发端温度始终大于冷凝端温度。同时对各类散热装置进行了热阻分析,确定了热板散热器的传热优化方向。
A heat pipe substrate module diffused heat by phase change was designed and transient thermal properties of the vapor chamber was analyzed.The temporal experiment results indicated that temperature drop of the wick of the evaporation and condensation is respectively by 86 percent and 13 percent of the total temperature drop of the vapor chamber,and the closure is more uniform than the startup of the temperature distribution.The time of heat pipe to get steady state mainly depends on the heat transfer coefficient.The larger the heat transfer coefficient is,the shorter the time to reach steady state is.The wick of the evaporation is the main thermal resistance,when the heat pipe starts and closes,the temperature of evaporation is always greater than the condensation.At the same time,the thermal resistance of various heat sinks was analyzed,and the heat transfer optimization direction of the flat heat plate radiator was determined.
引文
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