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研究目的:通过实验方法定量研究在相变材料较为剧烈的熔化传热过程中散热器倾斜角度的改变对其瞬时性能所产生的影响。创新要点:定量研究在倾斜角度从水平到垂直时,储能式散热器在脉冲式热负荷作用下瞬时性能的变化规律,并在所研究的工况范围内给出了最优的倾斜角度参考值。研究方法:采用电加热方法模拟电子器件所产生的热源,通过调节电压改变脉冲式热负荷的强度和作用时间,并根据热电偶测量所得的加热表面温度变化来表征储能式散热器的瞬时性能。重要结论:在一定的倾斜角度下工作,可以有效提升基于相变材料的储能式散热器的瞬时性能。在加热功率为40 W、以75℃为目标时,其有效保护时间的相对增长可达约67%。
The purpose of this study was to quantitatively study the influence of the change of the inclination angle of the radiator on the instantaneous performance of the phase transition material during the more intense heat transfer. Innovative points: Quantitative study of the tilt angle from horizontal to vertical, energy storage radiator in the transient thermal load under the instantaneous changes in the law, and in the study under the conditions given the best tilt angle reference value. Research methods: The electric heating method is used to simulate the heat source produced by the electronic device, and the intensity and duration of the pulsed thermal load are adjusted by adjusting the voltage. The instantaneous performance of the energy storage radiator is characterized by the change of the heating surface temperature measured by the thermocouple . Important Conclusions: Working at a certain tilt angle can effectively improve the instantaneous performance of energy storage heat sinks based on phase change materials. With a heating power of 40 W and a target of 75 ° C, the relative increase in effective protection time can reach about 67%.