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Title: Preparation and influence factors of low-grade thermal-energy storage material
Authors: Wu, HJ
Zhu, DS
Wang, SW 
Wang, CH
Keywords: Composite sorbent
Energy storage
Low-grade heat
Issue Date: 2006
Publisher: 華南理工大學學報編輯委員會
Source: 华南理工大学学报. 自然科学版 (Journal of South China University of Technology. Natural science), 2006, v. 34, no. 3, p. 6-9 How to cite?
Journal: 华南理工大学学报. 自然科学版 (Journal of South China University of Technology. Natural science) 
Abstract: 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 1050 J/g with the amount of adsorbed water, and that the composite sorbent can be effectively regenerated at 90°C. Therefore, the composite sorbent is feasible to store and utilize the low-grade thermal energy, such as solar energy and industrial-waste heat.
ISSN: 1000-565X
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