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Author(s): |
Yuanzhi Zuo, Key Lab. of Enhanced Heat Transfer & Energy Conservation of MOE，South China University of Technology, Guangzhou, China
Xiaoxi Yang, Guangdong Provincial Key Lab of Distributed Energy System, Dongguan University of Technology, Dongguan, China
Jing Ding, School of Engineering, Sun Yat-sen University, Guangzhou, China |
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Abstract: |
The molten salt thermocline thermal energy storage (TES) will offer a promise high-temperature TES technology for the concentrating solar power system. Based on the local thermal non-equilibrium (LTNE) assumption, the heat transfer and heat storage LTNE simulation model of the single-phase flow through porous media in the molten salt thermocline system is provided, and the influences of the characteristic parameters of the molten salt and porous media on the TES performance are analyzed through adopting Matlab software, and the precondition of applying the local thermal equilibrium (LTE) assumption is obtained. The result shows if the equivalent particle diameter of porous media is not greater than 0.004mm or the thermal conductivity of molten salt and porous media are in the same order of magnitude, it is valid to apply the LTE model for calculating the heat transfer in porous media. The heat storage and heat transfer characteristics of the single- phase flow through porous media in the molten salt thermocline TES system are revealed, which will provide an important basis for the design and operation control of the molten salt high temperature thermocline system.
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