Abstract The goal of this paper is to focus on a strategy to reduce the discharge time for a heat sink filled with a Phase Change Material (PCM). Reducing the heat discharge time is one of the key criteria in the design of a PCM based heat sink used in electronics cooling. To date, almost all of the studies have focused on the improvement of charging time for continuous operation under heavy computational loads. However, when intermittent operations are considered, which are most likely to be encountered in practice, a reduction in the heat discharge time from the heat sink is as important as that of improvement in the charging time. This work reports the results of detailed experimental studies carried out to improve the performance of a PCM based heat sink in the discharging cycle using baffles. Baffles are horizontal plate fins made of aluminum, and the PCM used is n-eicosane. Among different fill ratios and orientations considered, the heat sink with a 99% fill ratio at 0∘ orientation offered the best performance. A numerical study is also performed on the best performing heat sink to ascertain the actual causes for the lower discharge time.

中文翻译：

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带挡板的 PCM 基散热器传热的实验和数值研究

摘要 本文的目标是专注于减少填充相变材料 (PCM) 的散热器的放电时间的策略。减少散热时间是设计用于电子设备冷却的基于 PCM 的散热器的关键标准之一。迄今为止，几乎所有的研究都集中在提高计算负载下连续运行的充电时间上。然而，当考虑在实践中最有可能遇到的间歇操作时，减少从散热器的散热时间与改善充电时间同样重要。这项工作报告了为提高基于 PCM 的散热器在使用挡板的放电循环中的性能而进行的详细实验研究的结果。挡板是由铝制成的水平板翅片，使用的 PCM 是正二十烷。在考虑的不同填充率和方向中，在 0∘ 方向具有 99% 填充率的散热器提供了最佳性能。还对性能最佳的散热器进行了数值研究，以确定放电时间较短的实际原因。