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首页> 外文期刊>Journal of Heat Transfer >Alumina Nanoparticles Enhance the Flow Boiling Critical Heat Flux of Water at Low Pressure
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Alumina Nanoparticles Enhance the Flow Boiling Critical Heat Flux of Water at Low Pressure

机译:氧化铝纳米颗粒增强低压下水的沸腾临界热通量

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摘要

Many studies have shown that addition of nanosized particles to water enhances the critical heat flux (CHF) in pool boiling. The resulting colloidal dispersions are known in the literature as nanofluids. However, for most potential applications of nanofluids the situation of interest is flow boiling. This technical note presents first-of-a-kind data for flow boiling CHF in nanofluids. It is shown that a significant CHF enhancement (up to ~30%) can be achieved with as little as 0.01% by volume concentration of alumina nanoparticles in flow experiments at atmospheric pressure, low subcooling (<20℃), and relatively high mass flux (≥ 1000 kg/m~2s).
机译:许多研究表明,向水中添加纳米颗粒会增强池沸腾过程中的临界热通量(CHF)。所得的胶态分散体在文献中称为纳米流体。然而,对于纳米流体的大多数潜在应用,关注的情况是流动沸腾。该技术说明提供了纳米流体中CHF流动沸腾的首个数据。结果表明,在大气压,低过冷度(<20℃)和相对较高的质量通量的流动实验中,以0.01%(体积)的氧化铝纳米粒子的体积浓度,可以获得显着的CHF增强(高达〜30%)。 (≥1000 kg / m〜2s)。

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