Phase change dispersions have recently gained interest in isothermal cooling applications. So far, almost all of the investigated phase change dispersions consist of paraffins as the phase change materials. This paper presents a phase change dispersion with two fatty-acid esters as the phase change material, Crodatherm-53/Crodatherm-47 (50:50). The dispersion has a melting temperature of 50 °C and is foreseen in high-voltage direct current component cooling. The phase change dispersion was stabilised with emulsifiers to prevent phase separation and nucleation agents were added to supress supercooling. From thermal history calculations, the supercooling of the dispersion was reduced by 10 K with the addition of the nucleation agent. A monomodal particle size distribution was achieved. The viscosity of the dispersion at 20 wt.% and shear rate of 100 1s⁻¹ was found to be 4.9 mPa۰s at 25 °C, and 2.0 mPa۰s at 60 °C .The viscosity at different temperatures, mass fractions and shear rates was also assessed. From DSC analysis, an apparent specific heat capacity of 8.5 kJ kg⁻¹ K⁻¹ was measured for the phase change dispersion. This value is double the apparent specific heat capacity of water within the desired melting range (47.5–50.0 °C). Thermal conductivity measurements showed in the emulsion form, at 25 °C the phase change dispersion had a thermal conductivity of 0.529 W m⁻¹ K⁻¹ and in suspension form at 60 °C was 0.561 W m⁻¹ K⁻¹. Both thermal conductivity values were lower than water at each temperature.

相变分散体最近在等温冷却应用中引起了人们的兴趣。到目前为止，几乎所有研究的相变分散体均由石蜡作为相变材料组成。本文介绍了一种以两种脂肪酸酯为相变材料Crodatherm-53 / Crodatherm-47（50:50）的相变分散体。该分散体的熔融温度为50°C，可以预见在高压直流组件冷却中。用乳化剂使相变分散体稳定，以防止相分离，并向成核剂中加入成核剂以抑制过冷。根据热历史计算，在加入成核剂的情况下，分散体的过冷度降低了10K。获得了单峰粒度分布。分散体的粘度为20重量％。发现^-1在25°C下为4.9 mPa۰s，在60°C下为2.0 mPa۰s。还评估了在不同温度，质量分数和剪切速率下的粘度。通过DSC分析，相变分散体的表观比热容为8.5kJkg ^-1  K ^-1。该值是所需融化范围（47.5-50.0°C）中水的表观比热容的两倍。热导率测量以乳液形式显示，在25°C下相变分散体的热导率为0.529 W m ^-1  K ^-1，在悬浮液中，在60°C下为0.561 W m ^-1  K ^-1。在每个温度下，两个热导率值均低于水。