非对称双曲线蓄热装置研究

Energy Storage Pub Date : 2024-09-02 DOI:10.1002/est2.70015
Huanting Luo, Wenjing Du, Zhan Wang
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引用次数: 0

摘要

相变储能技术具有能量密度高、温度恒定等优点,在节能和能源高效利用方面备受关注。本文利用 Fluent 软件模拟分析了波纹管形、双曲面形、非双曲面形、对称顿挫面形、非顿挫面形和弓形六种新型储热单元的储热特性。结果表明,非双曲型相变单元的熔化率明显高于圆管,蓄热时间缩短了 22.52%,Ra* 达到 0.0086。其次,研究了非双曲面形相变单元进出口半径差(δ)和不对称位置(s)对蓄热过程的影响。结果表明,当 δ 从 2 毫米增加到 10 毫米时,相变材料(PCM)的熔化时间缩短了 22.89%,即 PCM 与导热流体之间的平均传热速率随着 δ 的增加而增加。当 δ = 10 mm、s = 35 mm 为最佳工况时,非双曲型蓄热装置的平均蓄热率达到 34.3 J/s。这项研究可为潜热蓄热装置的优化设计和实验进展提供新的思路和参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Study of Asymmetric Hyperbolic Heat Storage Unit

Due to the advantages of high energy density and constant temperature, phase change energy storage technology has attracted much attention in energy saving and efficient utilization of energy. In this paper, Fluent software is used to simulate and analyze the heat storage characteristics of six new thermal storage units: corrugated tube, hyperbolic-shape, non-hyperbolic-shape, symmetric frustum-shape, non-frustum-shape, and bow-shape. The results show that the melting rate of the non-hyperbolic-shape phase change unit is significantly higher than that of the circular tube, the heat storage time is shortened by 22.52%, and Ra* reaches 0.0086. Second, the effects of the radius difference (δ) between the inlet and outlet of the non-hyperbolic-shape phase change unit and the asymmetric position (s) on the heat storage process are studied. The results show that when δ increases from 2 to 10 mm, the melting time of phase change material (PCM) is shortened by 22.89%, that is, the average heat transfer rate between PCM and heat transfer fluid increases with the increase of δ. On the other hand, the average heat storage rate of the heat storage unit decreases first and then increases with the increase of s. When δ = 10 mm, s = 35 mm is the best working condition, the average heat storage rate of the non-hyperbolic-shape thermal storage unit reaches 34.3 J/s. This study can provide new ideas and references for the optimization design of latent heat storage units and the progress of experiments.

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