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为了评估相变储能式散热技术在间歇式大功率电子器件热管理中的适用性,本文采用实验方法研究了在短时大功率(60~120 W)较高热流密度(5.3~10.5 W·cm~(-2))加热条件下相变储能式热沉的瞬态性能.实验结果表明,在不同的加热功率下,采用相变储能式热沉可以将冷却目标的温升最多降低约40℃,而其平均等效热阻能比传统热沉降低30%以上,体现了明显的性能优势.此外,通过添加翅片的方法可以进一步改善相变储能式热沉的性能.如果设定电子器件正常的工作温度为80℃,有翅片的热沉能将有效保护时间延长多达130%.在大功率短时加热条件下,采用相变储能式热沉能够达到理想的散热效果,而通过强化传热手段可以进一步优化其性能.
In order to evaluate the applicability of phase-change thermal energy storage technology in the thermal management of intermittent high-power electronic devices, experimental methods were used to study the thermal performance of short-time high-power (60-120 W) high heat flux (5.3-10.5 W · cm ~ (-2)). The experimental results show that under the different heating power, the phase change energy storage heat sink can reduce the temperature rise of the cooling target About 40 ℃, and the average equivalent thermal resistance can be reduced by more than 30% compared with the traditional heat sink, which shows the obvious performance advantages. In addition, the performance of the phase change energy storage heat sink can be further improved by adding the fins. Setting the normal working temperature of the electronic device to 80 ° C, the finned heat sink can extend the effective protection time up to 130% .In high-power short-term heating conditions, the use of phase change energy storage heat sink can achieve the ideal Cooling effect, and by strengthening the means of heat transfer can further optimize its performance.