ABSTRACT

Strengthening the thermal response of Phase-Change Materials (PCMs) is an essential and active field of research with promising potential for advanced applications such as solar energy storage, building energy conservation, and thermal management in electronic devices. This article evaluates the efficacy of a new arc-shaped fin array in shell-and-tube heat storage systems to enhance the PCM response during the discharge mode. Different fin geometric parameters including the fin curvature angle, the fin spacing, and the nonuniform angle between fins in the top and bottom sections of the PCM domain were considered to identify the best-performing layout. The analysis shows that increasing the curvature of arc-shaped fins between 60° and 180° and increasing the fin spacing between 5 and 15 mm can significantly reduce solidifying time and improve heat recovery rates. Moreover, the arc-shaped fins are more efficient than conventional longitudinal (+-shaped) fins, which are commonly employed in thermal energy storage applications. Arc-shaped fins can also save discharge time by more than half and improve the rate of heat recovery by almost four times than that of + -shaped fins. The present findings suggest that arc-shaped fins represent a promising design for enhancing the heat-recovery aspects in PCM-based energy storage systems.

摘要

增强相变材料（PCM）的热响应是一个重要且活跃的研究领域，在太阳能存储、建筑节能和电子设备热管理等先进应用中具有广阔的前景。本文评估了管壳式蓄热系统中新型弧形翅片阵列在增强放电模式期间 PCM 响应方面的功效。考虑不同的翅片几何参数，包括翅片曲率角、翅片间距以及 PCM 域顶部和底部翅片之间的不均匀角度，以确定最佳性能的布局。分析表明，将弧形翅片的曲率增大到60°～180°之间，翅片间距增大到5～15 mm之间，可以显着缩短凝固时间，提高热回收率。此外，弧形翅片比热能存储应用中常用的传统纵向（+形）翅片更高效。弧形翅片还可以比+形翅片节省一半以上的放电时间，提高热回收率近四倍。目前的研究结果表明，弧形翅片代表了一种有前途的设计，可增强基于 PCM 的能量存储系统的热回收能力。它们通常用于热能存储应用。弧形翅片还可以比+形翅片节省一半以上的放电时间，提高热回收率近四倍。目前的研究结果表明，弧形翅片代表了一种有前途的设计，可增强基于 PCM 的能量存储系统的热回收能力。它们通常用于热能存储应用。弧形翅片还可以比+形翅片节省一半以上的放电时间，提高热回收率近四倍。目前的研究结果表明，弧形翅片代表了一种有前途的设计，可增强基于 PCM 的能量存储系统的热回收能力。