环空(植物学)
材料科学
同心的
传热
强化传热
管(容器)
机械
鳍
热能储存
还原(数学)
螺旋(铁路)
光学
传热系数
热力学
机械工程
复合材料
几何学
物理
工程类
数学
作者
Digant S. Mehta,Bhavesh Vaghela,Manish K. Rathod,Jyotirmay Banerjee
标识
DOI:10.1016/j.ijthermalsci.2021.107060
摘要
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.
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