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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental investigation of thermal and electrical conductivity of silicon oxide nanofluids in ethylene glycol/water mixture
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Experimental investigation of thermal and electrical conductivity of silicon oxide nanofluids in ethylene glycol/water mixture

机译：乙二醇/水混合物中氧化硅纳米流体热导率的实验研究

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摘要

In this paper, the thermal conductivity and electrical conductivity of SiO_2 nanofluids using mixture of ethylene glycol (EG) and water (H_2O) as the base fluid are investigated. The two-step method was used to prepare SiO_2-EG/H_2O nanofluids with a mass concentration of 0.3%. The variations in thermal conductivity and electrical conductivity as functions of EG concentration (0-100%, v/v) and temperature (25-45 ℃) are present. Experimental results showed that the thermal conductivity and electrical conductivity of SiO_2-EG/H_2O nanofluids both decreased as the EG content percentage increases in the EG/H_2O mixture. At a specific EG content percentage, thermal conductivity and electrical conductivity both increased with the increase in temperature. To better evaluate the enhancement performance of SiO_2-EG/H_2O nanofluids, the relative electrical conductivity was introduced and studied explicitly. The mechanism of electrical conductivity enhancement in SiO_2-EG/H_2O nanofluids was analyzed in detail. Meanwhile, the ratio of thermal conductivity and electrical conductivity was also discussed.
机译：本文研究了以乙二醇（EG）和水（H_2O）的混合物为基液的SiO_2纳米流体的热导率和电导率。采用两步法制备质量浓度为0.3％的SiO_2-EG / H_2O纳米流体。存在作为EG浓度（0-100％，v / v）和温度（25-45℃）的函数的热导率和电导率的变化。实验结果表明，随着EG / H_2O混合物中EG含量百分比的增加，SiO_2-EG / H_2O纳米流体的热导率和电导率均降低。在特定的EG含量百分比下，热导率和电导率均随温度的升高而增加。为了更好地评价SiO_2-EG / H_2O纳米流体的增强性能，引入相对电导率并进行了明确的研究。详细分析了SiO_2-EG / H_2O纳米流体中电导率增强的机理。同时，还讨论了热导率与电导率之比。

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