Original Article:
Experimental investigation of barium hydroxide octahydrate as latent heat storage materials
Qian Wang, et al.
Solar Energy, 2019, 177, 99-107.
10.1016/j.solener.2018.11.013
Past studies have demonstrated that barium hydroxide octahydrate is a promising material for thermal energy storage applications. As a low-temperature phase change material (PCMs), barium hydroxide octahydrate (Ba(OH)2·8H2O) has high latent heat capacity and large thermal conductivity. However, barium hydroxide octahydrate suffers from two disadvantages of supercooling and phase separation, which affect their functionality and durability and limit its heat storage applications.
Here, the researchers investigated the addition of different nucleating and gelling agents to suppress the supercooling and phase separation of barium hydroxide octahydrate. These nucleating agents include sodium borate, calcium chloride, calcium fluoride, calgon and copper powder. According to the comprehensive analysis results of the phase separation, specific heat capacity, heat of fusion, thermal conductivity and corrosion of the samples, 1% calcium fluoride and 1 % copper powder can effectively improve the thermal conductivity and heat of fusion of barium hydroxide octahydrate. Among them, 1% calcium fluoride showed the best suppression of supercooling, reducing the supercooling to 1.8 °C. In addition, in this experiment, gelatin was used as a thickener to suppress the phase separation phenomenon.
Chemicals Related in the Paper:
| Catalog Number | Product Name | Structure | CAS Number | Price |
|---|---|---|---|---|
| ACM40226300 | Barium hydroxide octahydrate |  |
40226-30-0 | Price |
