低温储能材料的制备及其影响因素  

Preparation and Influence Factors of Low-Grade Thermal-Energy Storage Material

作　　者：吴会军[1] 朱冬生[1] 王盛卫[2] 王春华[1] 

机构地区：[1]华南理工大学传热强化与过程节能教育部重点实验室,广东广州510640 [2]香港理工大学屋宇设备工程学系

出　　处：《华南理工大学学报（自然科学版）》2006年第3期6-9,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20346001);广东省自然科学基金资金项目(011584);教育部优秀青年教师资助计划项目;高等学校博士学科点专项科研基金资助项目

摘　　要：采用液相浸泡法,将吸湿性无机盐CaC l2与硅胶复合,制备出低温复合储能材料.对硅胶和复合储能材料的吸湿性能进行了对比实验,并利用吸附储能实验装置测试了它们的储能性能,研究了影响复合储能材料性能的因素.结果表明:较为合适的浸泡时间为4 h;提高CaC l2含量和浸泡温度有利于复合储能材料吸湿量和质量热力学能(储能密度)的提高;随着吸湿能力的增强,复合储能材料的质量热力学能增大,可达1 050 J/g;同时,该复合储能材料可在90℃温度下有效再生,适用于太阳能、工业废热等低温热的储存和利用.A composite low-grade thermal-energy storage sorbent was first prepared by impregnating hygroscopic salt CaCl2 into silica gel. Next, the water-adsorbing properties of the prepared sorbent and pure silica gel were measured and compared. Then, the corresponding thermal-energy storage properties were investigated in a sorption setup. Finally, the factors affecting the adsorbing properties of the composite sorbent were studied. Experimental results show a proper impregnation period of 4 h and an increase in water adsorption and specific thermal-energy storage density with the increases of CaCl2 content and impregnation temperature. It is also indicated that the specific thermal-energy storage density of the composite sorbent increases up to 1 050 J/g with the amount of adsorbed water, and that the composite sorbent can be effectively regenerated at 90 ℃. Therefore, the composite sorbent is feasible to store and utilize the low-grade thermal energy, such as solar energy and industrial-waste heat.

关 键 词：复合吸附材料 储能 制备 低温热 

分 类 号：TK02[动力工程及工程热物理]