A versatile one-dimensional numerical model for packed-bed heat storage systems

RENEWABLE ENERGY

卷:133

Article

Esence, Thibaut¹  Bruch, Arnaud¹  Fourmigue, Jean-Francois¹  Stutz, Benoit² 

[1] Univ Grenoble Alpes, CEA, LITEN, DTBH,Lab Stockage Therm, F-38000 Grenoble, France

[2] Univ Savoie, LOCIE, Savoie Technolac, Campus Sci, F-73376 Le Bourget Du Lac, France

关键词: Thermal energy storage;    Packed bed;    Thermocline;    Porous medium;    Numerical model;    Fluid velocity influence;   

DOI  :  10.1016/j.renene.2018.10.012

来源: Elsevier

【 摘 要 】

Thanks to their versatility and their relatively low cost, packed-bed sensible heat storage systems are promising for various applications like in concentrated solar power plants, adiabatic compressed energy storage and pumped thermal energy storage. A versatile one-dimensional numerical model able to describe many packed-bed configurations is developed and presented. This model is able to treat liquid and gaseous heat transfer fluids, and packed bed with a monomodal or a bimodal particle size repartion, i.e. consisting of a mixture of large and small solid particles (such as rocks and sand). This configuration is commonly encountered in the literature due to the advantages it procures. The model is compared and validated with specific experimental data and results from the literature covering wide ranges of configurations and operating conditions: several heat transfer fluids (molten salts, thermal oil, air), solid materials (rocks, sand, ceramics), fluid velocities, temperature levels and packed bed configurations are successfully tested. This shows the versatility of the developed model. The influence of the fluid velocity on heat losses, thermal diffusion and fluid/solid heat exchange are analysed. It enables to determine the optimal velocity which maximizes the performance of the storage system. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

Free