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.
| Original language | Chinese (Simplified) |
|---|---|
| Pages (from-to) | 6-9 |
| Number of pages | 4 |
| Journal | Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) |
| Volume | 34 |
| Issue number | 3 |
| Publication status | Published - 1 Mar 2006 |
Keywords
- Composite sorbent
- Energy storage
- Low-grade heat
- Preparation
ASJC Scopus subject areas
- General Engineering