Development of graphite foam infiltrated with MgCl2 for a latent heat based thermal energy storage (LHTES) system

RENEWABLE ENERGY

卷:94

Article

Singh, Dileep¹  Kim, Taeil¹  Zhao, Weihuan¹  Yu, Wenhua¹  France, David M.² 

[1] Argonne Natl Lab, Div Energy Syst, 9700 S Cass Ave, Argonne, IL 60439 USA

[2] Univ Illinois, Dept Mech & Ind Engn, 842 West Taylor St M-C 251, Chicago, IL 60607 USA

关键词: Latent heat thermal energy storage;    Concentrated solar power;    Phase change material;    Graphite foam;    Infiltration;    Magnesium chloride;   

DOI  :  10.1016/j.renene.2016.03.090

来源: Elsevier

【 摘 要 】

Thermal energy storage (TES) systems that are compatible with high temperature power cycles for concentrating solar power (CSP) require high temperature media for transporting and storing thermal energy. To that end, TES systems have been proposed based on the latent heat of fusion of the phase change materials (PCMs). However, PCMs have relatively low thermal conductivities. In this paper, use of high-thermal-conductivity graphite foam infiltrated with a PCM (MgCl2) has been investigated as a potential TES system. Graphite foams with two porosities were infiltrated with MgCl2. The infiltrated composites were evaluated for density, heat of fusion, melting/freezing temperatures, and thermal diffusivities. Estimated thermal conductivities of MgCl2/graphite foam composites were significantly higher than those of MgCl2 alone over the measured temperature range. Furthermore, heat of fusion, melting/freezing temperatures, and densities showed comparable values to those of pure MgCl2. Results of this study indicate that MgCl2/graphite foam composites show promise as storage media for a latent heat thermal energy storage system for CSP applications. (C) 2016 Published by Elsevier Ltd.

【 授权许可】

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