A nano enhanced phase change material, NEPCM, was prepared by the addition of carbon nanotubes, CNTs, to butyl stearate. This study utilised single walled nano tube, multi-walled nanotube and modified multi-walled nanotube. Several kinds of surfactants were used to stabilise nano-particles in butyl stearate. Tetramethyl ethylene diamine (TEMED) was the best surfactant for enhancing the stability time of nano-fluid. The effect of CNTs concentration on the thermal properties of base fluid was studied and it was found that for all kinds of CNTs, the highest thermal conductivity of NEPCM was observed in weight fraction of 0.03. The modified-MWCNTs have the most enhancements in the butyl stearate thermal conductivity. It was found from differential scanning calorimetry tests, that modified-MWCNTs with 2 wt.% contents have the most effect on the latent heat of fusion of the base fluid. It was also observed that the SWCNT has a considerable effect on the melting point of PCM.

通过向硬脂酸丁酯中添加碳纳米管CNT来制备纳米增强相变材料NEPCM。这项研究利用了单壁纳米管，多壁纳米管和改性的多壁纳米管。几种表面活性剂用于稳定硬脂酸丁酯中的纳米颗粒。四甲基乙二胺（TEMED）是延长纳米流体稳定性的最佳表面活性剂。研究了碳纳米管浓度对基础流体热性能的影响，发现对于所有种类的碳纳米管，NEPCM的最高导热率均以0.03的重量分数计。改性的MWCNT在硬脂酸丁酯的导热性方面具有最大的增强。从差示扫描量热法测试中发现，具有2wt。％的改性MWCNT。％的含量对基础流体的熔化潜热影响最大。还观察到SWCNT对PCM的熔点有相当大的影响。