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Experimental study on thermal conductivity of ethylene glycol based nanofluids containing Al_2O_3 nanoparticles

机译:含Al_2O_3纳米粒子的乙二醇基纳米流体导热系数的实验研究

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摘要

To get more experimental and fundamental understanding of the thermal behavior of nanofluids, the thermal conductivity of Al_2O_3-EG nanofluids have been examined using a KD2-Pro thermal analyzer. The effects of temperature and concentration on thermal conductivity of nanofluid are investigated. The experiments performed at temperature ranging from 24 ℃ to 50 ℃ while volume fractions up to 5%. The experimental results exhibited that the thermal conductivity of nanofluids enhances significantly with increase in concentration and temperature. Also, attempts were made to propose new accurate correlations for estimating thermal conductivity at different temperatures and concentrations. For this purpose, two new correlations with very high accuracy were suggested. To estimate thermal conductivity at different temperatures, focusing more on accuracy and usability, several correlations have been proposed. These correlations have been presented separately at different temperatures which can be more accurate.
机译:为了获得对纳米流体的热行为的更多实验和基本了解,已使用KD2-Pro热分析仪检查了Al_2O_3-EG纳米流体的热导率。研究了温度和浓度对纳米流体导热系数的影响。实验在24℃至50℃的温度范围内进行,而体积分数高达5%。实验结果表明,随着浓度和温度的升高,纳米流体的热导率显着提高。此外,尝试提出新的精确相关性,以估计不同温度和浓度下的热导率。为此,提出了两个非常高精度的新的相关性。为了估算不同温度下的热导率,更多地关注精度和可用性,已经提出了几种相关性。这些相关性已经在不同的温度下分别给出,可以更加精确。

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