为改善立方体储能单元的相变储能蓄热效果,运用数值方法研究插入翅片后相变材料熔化效果,并对比增加翅片数量与改变翅片插入位置后对PCM熔化速率的影响。研究结果表明：插入翅片后PCM熔化速率显著提升,相比于三翅片结构,单翅片与双翅片储能单元随LR,f的增加性能提升良好,双翅片0.75LR,f立方体储能单元性能较好,其PCM完全熔化时间相比于无翅片结构提升193%;翅片向下偏移有助于缩短PCM完全熔化时间,其中0.54HR,f结构对PCM熔化具有更好的改善作用。
Abstract
In order to improve the phase change energy storage effect in cube heat storage units, the melting effect of phase change materials after inserting fins was studied by numerical methods, and the influence of increasing the number of fins and changing the insertion position of fins on the melting rate of PCM was compared. The results show that the melting rate of PCM is significantly improved after the fins are inserted. Compared with the three-fin structure, the performance of single-fin and dual-fin energy storage units is improved with the increase of LR,f. The dual-fin energy storage unit with 0.75 LR,f of cube heat storage unit has better performance, and the PCM melting time is improved 193% compared with the non-fin structure. The downward shift of fins is helpful to shorten the PCM melting time, and 0.54HR,f structure has a better effect on PCM melting.
关键词
蓄热 /
数值方法 /
相变材料 /
立方体式 /
翅片
Key words
heat storage /
numerical methods /
phase change materials /
cube energy storage unit /
fins
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基金
国家自然科学基金（51774161）; 辽宁省教育厅项目（LJKZ0367）; 辽宁工程技术大学学科创新团队资助项目（LNTU20TD-15）
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