新戊二醇-季戊四醇二元系固-固相变贮热的研究

THE STUDY OF NEOPENTYLGLYCOL-PENTAERYTHRITOL BINARY SYSTEM FOR SOLID-SOLID PHASE CHANGE IN THERMAL ENERGY STORAGE

用DSC法(差示扫描量热法)研究多元醇(CH_3)_2—C(CH_2OH)_2(NPG)和C—(CH_2OH)_4(PE)混合物相变贮热体系,NPG/PE具有固-固转变的特性,适用于贮能,其纯组分的转变温度分别为44℃和187℃附近。研究表明转变热和转变温度与体系中化合物的浓度有关,故可以在NPG中加入一定量PE,使转变温度得到调节,这既可控制所需的温度,又使低温贮热效果高,这类混合物作为太阳能贮热物质是很有用的。

This Paper introduces that DSC methods were used to Study binary mixtures PE/NPG of phase Change for thermal energy storage. The Polyalcohols neopentylglycol(CH_3)_2—C(CH_2OH)_2(NPG) and Pentaerythritol C—(CH_2OH)_4(PE) exhibit Solid to Solid transformations. These Compounds are used in thermal energy Stoage. The transition temperatures are 44℃ and 187℃ respectively. We have analgzed dependence of the transition heat and the transition temperature on the Concentration of the Compounds. Our calorimetric restlts show that PE/NPG Systems are suitable for heat storage