Optimal design for sensible thermal energy storage tank using natural solid materials for a parabolic trough power plant
Optimal design for sensible thermal energy storage tank using natural solid materials for a parabolic trough power plant
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DOI：
10.1016/j.solener.2018.06.108
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发表时间：
2018-09
期刊：
影响因子：
6.7
通讯作者：
K. Bataineh;A. Gharaibeh
中科院分区：
文献类型：
--
作者：
K. Bataineh;A. Gharaibeh
本文介绍了设计用于在 523–673K 温度范围内储存热量的显热储存 (SHS) 装置的瞬态行为和热储存能力的数值研究。本研究的目的是评估使用两种候选材料作为约旦发现的储能介质的潜力。在 SHS 储罐中使用这些材料的热性能与混凝土床进行了比较。设计了一种带有嵌入式充电管的圆柱形蓄热单元。为了研究它们的蓄热特性，我们使用 COMSOL Multiphysics 5.1 开发了基于有限元的 3D 数学模型。数值预测结果与文献报道的数据非常吻合。对所选三种蓄热材料进行了3h容量136.7MW蓄热床的性能评价（包括充电时间、储能率、充电能效）。为了优化储能罐的设计，通过改变装料管数量、装料管直径、翅片效率和存储床直径及其高度进行参数研究。模拟结果表明，考虑到与熔盐和混凝土床层相关的问题，采用优化设计的这些材料的整体热性能令人满意。更具体地说，死海盐、混凝土床和玄武岩相对于熔盐工厂更具经济吸引力，因为它们消除了与防冻相关的额外成本，无加压问题，无腐蚀。最后，天然石材可以在更高的温度下工作，并且不会因循环充放电而产生龟裂。
This paper presents numerical investigation of transient behavior and thermal storage capability of a sensible heat storage (SHS) unit designed for storing heat in the temperature range of 523–673 K. The objective of this study is to assess the potential of using two candidate materials as energy storage media found in Jordan. The thermal performance of using these materials in SHS tank is compared against concrete bed. A heat storage unit of cylindrical configuration with embedded charging tubes has been designed. To investigate their heat storage characteristics, a finite element based 3-D mathematical model has been developed using COMSOL Multiphysics 5.1. Numerically predicted results match closely with the data reported in the literature. Performances of the thermal storage bed of capacity of 136.7 MW in 3 h (including charging time, energy storage rate, charging energy efficiency) have been evaluated for the selected three storage materials. In order to optimize the design of energy storage tank, parametric studies are carried out by varying the number of the charging tubes, diameter of charging tubes, fins effectiveness, and storage bed diameter to its height. Simulations results showed that overall thermal performance of these materials using optimal design are satisfactory considering the problems associated with molten salt and concrete bed. More specifically, Dead Sea salt, concrete bed and Basalt rocks are more economically attractive relative to molten salt plant because they eliminate the extra cost associated with freeze protection, no pressurizing problem, no corrosion. Finally, natural stones can operate at higher temperature and do not suffer from cracking due to cyclic charging and discharging.