在考虑了纳米层的情况下对原有的Xue导热模型进行改进,研究多壁碳纳米管-水纳米流体的热传导性能,推导出纳米流体导热公式并将纳米流体运用到碳钢重力热管中,在不同质量分数下对单管传热进行实验研究.结果表明纳米层的存在提高了有效热导率;在相同条件下质量分数2%的多壁碳纳米管-水纳米流体重力热管传热性能最好,传热系数比普通水重力热管最大提高了40%.%An improved model of thermal conduction of multi-walled carbon nanotubes–deionized water (MWCNTs-DW) nanofluids is proposed based on the Xue model by considering interfacial nanolayer, analyzing heat conduction, derivating thermal conductivity of MWCNTs-DW nanofluids and applyingMWCNTs-DW nanofluids to the research of heat transfer in gravity heat pipe. Different mass fraction of nanofluids gravity heat pipe are prepared and investigated using the nanofluid as the work liquid and the carbon steel pipe as material. The result shows that the interface nanolayer increases the effective thermal conductivity and the mass fraction of 2% is best performance under the same conditions, the heat transfer coefficient of nanofluids gravity heat pipe increases by 40% to the max than that of the base fluid water.
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