A comprehensive experimental analysis is reported to estimate the heat transfer enhancement in concentric tube type Latent Heat Storage Unit (LHSU) using spiral fins. An angle adjuster is provided in the experimental test facility to facilitate orienting the LHSU at different angles i.e. vertical (θ = 90°), horizontal (θ = 0°) and inclined (θ = 45°). Total 45 temperature probes are installed in the annulus of the concentric tubes for accurate measurement of temperature in radial, axial and angular direction. Provision of fins expedites melting rate, which results in reduction in time required for energy storage. With the installation of the spiral fins, a maximum reduction in the charging time of 51.61% is observed when the test section is aligned in vertical (θ = 90°) orientation. Inclined (θ = 45°) and horizontal (θ = 0°) test section offer 40.97% and 34.1% reduction in the melting time respectively. LHSU integrated with the spiral fins may enable its application to large scale solar thermal applications.

据报道，一项综合实验分析用于估计使用螺旋翅片的同心管式潜热储存单元 (LHSU) 中的传热增强。实验测试设施中提供了一个角度调节器，以促进 LHSU 以不同角度定向，即垂直 (θ = 90°)、水平 (θ = 0°) 和倾斜 (θ = 45°)。共45个温度探头安装在同心管的环面上，用于精确测量径向、轴向和角度方向的温度。翅片的提供加快了熔化速度，从而减少了能量存储所需的时间。安装螺旋翅片后，当测试部分垂直（θ = 90°）方向对齐时，观察到充电时间最大减少了 51.61%。倾斜 (θ = 45°) 和水平 (θ = 0°) 测试段提供 40 个。熔化时间分别减少 97% 和 34.1%。与螺旋翅片集成的 LHSU 可使其应用于大规模太阳能热应用。