PG固-固相变潜热型功能热流体制备及热物性研究

PREPARATION AND THERMOPHYSICAL PROPERTIES OF PG SOLID-SOLID PHASE CHANGE LATENT FUNCTIONALLY THERMAL FLUID

提出使用固-固相变材料三羟甲基乙烷（PG）制备相变潜热型功能热流体,可直接将固体PG研磨为微粒分散在导热油中,制备过程简单,且使用过程中不会出现固-液相变微胶囊破碎失效的问题。通过光学显微观察PG微颗粒在导热油中的分散性以及颗粒尺寸,采用差式扫描量热仪（DSC）测量不同配比下功能热流体的相变温度、相变潜热及表观比热等热物性,结果表明PG相变微颗粒的加入可显著提高流体蓄热能力。

The solid-solid phase change material Trimethylolethane（PG） is employed to prepare a novel latentfunctionally thermal fluid by directly dispersing ground PG micro-particles into the fluid. The preparation process isrelative simple,and it has no breakage or shriveled problems during usage. Meanwhile,an optical microscope is used toobserve the dispersibility,morphology and the size of the PG micro-particles in the fluid;its thermophysical propertiessuch as phase change temperature,latent heat and apparent specific heat are all measured by a DSC. The results showthat PG particles can obviously improve the heat storage capacity of the fluid.