Preparation and characterization of composite material Na2SO410H2O - KAl(SO4)212H2O for thermal storage

1st International Conference on New Material and Chemical Industry

材料科学;化学工业

Zheng, M.^1 ; Luo, J.W.^1 ; Zhang, Y.H.^1 ; Chen, P.^1

School of Chemical Engineering, Northwest University, Xi'an

710069, China^1

关键词: Low-temperature applications;    Mass ratio;    Melting method;    Phase change temperature;    Phase-change thermal storages;    Step cooling;    Thermal storage;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/167/1/012007/pdf
DOI  :  10.1088/1757-899X/167/1/012007

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In the present paper, the preparation and characterization of composite material Na2SO4•10H2O - KAl(SO4)2•12H2O for thermal storage are reported. The co - melting method is employed to perform the preparation. The thermal properties and the step cooling behaviors of the composites are studied. The results show that: the phenomenon of phase separation disappears in the composite system with the mass ratio of 1 : 9 to 3 : 7 (Na2SO4•10H2O: KAl(SO4)2•12H2O), and the optimized mass ratio is about 2 : 8, which results in the lowest phase change temperature, the longest heat releasing platform of 41 min and a higher latent heat of 819.93J/g at 72.7 °C; the enthalpy remains higher value after 50 thermal cycles. Thus, this composite material has a potential as the phase change thermal storage material for low temperature application.