Numerical investigation on the thermal performance of a molten salt tank under different electric heating method

IF 6.3 2区材料科学 Q2 ENERGY & FUELS Solar Energy Materials and Solar Cells Pub Date : 2024-09-25 DOI:10.1016/j.solmat.2024.113183

Yuanjing Wang , Jinan Liu , Xin Ma , Yuming Ouyang , Dalong Zhu , Yanping Zhang

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Abstract

Two-tank molten salt (MS) thermal energy storage (TES) technology is an efficient and widely used energy storage technology. This study develops a two-dimensional discrete model (2DIM) using the Modelica language to accurately and quickly represent molten salt temperature distribution and heat loss, applicable to system-level analysis in thermal power systems. It also uncovers variations in heat loss, cooling rate, and required auxiliary electric heating power across different tank volumes, liquid levels, and MS temperatures, offering guidance for optimizing design, energy management, and operational strategies. Additionally, the study examined the impact of different electric heater placements on the performance of the thermal storage system. The results show that heating the gas inside the tank is more effective than traditional direct electric heating, reducing molten salt heat loss by 25.89 % and increasing energy storage efficiency by 0.17 %.The research provide a reference for the study of efficient utilization of TES tank in different thermal systems.

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不同电加热方法下熔盐罐的热性能数值研究

双罐熔盐（MS）热能存储（TES）技术是一种高效且应用广泛的储能技术。本研究使用 Modelica 语言开发了一个二维离散模型 (2DIM)，以准确、快速地表示熔盐温度分布和热损失，适用于热电系统的系统级分析。它还揭示了不同储罐容积、液位和 MS 温度下热量损失、冷却率和所需辅助电加热功率的变化，为优化设计、能源管理和运营策略提供指导。此外，该研究还考察了不同电加热器位置对蓄热系统性能的影响。研究结果表明，加热储热罐内的气体比传统的直接电加热更有效，可减少 25.89% 的熔盐热损失，提高 0.17% 的储能效率。

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来源期刊

Solar Energy Materials and Solar Cells 工程技术-材料科学：综合

CiteScore

12.60

自引率

11.60%

发文量

513

审稿时长

47 days

期刊介绍： Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.