Abstract The convection heat transfer of nano-encapsulated phase change material (NEPCM)-water suspensions in a divergent minichannel heatsink was experimentally investigated. The mini heatsink was made of eight minichannels with a divergent angle of 1.38°. The minichannel was heated at the bottom, and the NEPCM-water was used as the cooling working fluid. The average Nusselt number, the index of performance, and the pressure drop of NEPCM-water compared to the pure water were examined. The experiments show that employing NEPCMs could be advantageous in low Reynolds number flows and low heating powers. The phase change heat transfer of NEPCM particles promoted the heat transfer by 82% compared to pure water. Moreover, using the NEPCM particles was not advantageous at large Reynolds numbers, where the sensible heat was the dominant mechanism of heat transfer.

中文翻译：

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纳米封装相变材料悬浮液在发散微通道散热器中的对流传热

摘要 通过实验研究了纳米封装相变材料 (NEPCM)-水悬浮液在发散微通道散热器中的对流传热。微型散热器由八个发散角为 1.38° 的微型通道组成。微通道在底部加热，NEPCM-水用作冷却工质。检查了平均努塞尔数、性能指数和 NEPCM 水与纯水相比的压降。实验表明，使用 NEPCM 在低雷诺数流和低加热功率方面可能是有利的。与纯水相比，NEPCM 颗粒的相变传热促进了 82% 的传热。此外，使用 NEPCM 颗粒在雷诺数较大时并不有利，