非均匀翅片对级联相变储热系统热性能强化的研究
摘要：级联相变储热是一种具有重要商业前景的相变储热技术。利用数值模拟方法研究了一种采用非均匀翅片布置进行强化传热的级联相变储热系统，分析了各级相变储热模块采用均匀翅片数量和均匀翅片高度布置对系统的强化作用，进而研究了各级模块采用非均匀翅片数量和非均匀翅片高度布置下系统的充/放热性能。研究结果表明：相比于各级采用均匀翅片数量布置，采用非均匀翅片数量布置的级联相变储热系统可缩短完全熔化及凝固总时间约5.2%，同时提高系统充热平均功率约12.6%；采用非均匀翅片高度布置可略微缩短系统完全熔化及凝固总时间，但对系统充/放热平均功率影响较小。研究结果对级联相变储热系统的强化传热具有一定理论指导价值。
Abstract:The cascaded latent heat thermal energy storage (CLH-TES) is a kind of thermal energy storage technology with promising commercial prospects. The heat transfer enhancement of CLH-TES system by adding uneven number/height of fins for different phase change material (PCM) layers (uneven number/height layout) was numerically investigated. Firstly, for the system adding same number/height of fins for all the PCM layers (even number/height layout), the influences of number and height of fins on the charging and discharging performance were compared. Then, the charging and discharging performances of the systems with uneven number/height layout of fins were calculated. The results show, comparing to the even number layout,the system with uneven number layout can shorten the total time for the melting and solidification processes by 5.2% and increase the average charging rate by 12.6%. Besides, comparing to the even height layout, the system with uneven height layout can slightly decrease the total time for the melting and solidification processes but hardly affect the average charging and discharging rate. The findings can guidance the design of heat transfer enhancement to the CLH-TES with fins.
标题：非均匀翅片对级联相变储热系统热性能强化的研究
title:Heat Transfer Enhancement of a Cascaded Latent Heat Thermal Energy Storage System by Fins With Different Uneven Layouts
作者：廖志荣, 李朋达, 田紫芊, 徐超, 魏高升
authors:Zhirong LIAO, Pengda LI, Ziqian TIAN, Chao XU, Gaosheng WEI
关键词：太阳能热发电,级联相变储热(CLH-TES),相变材料(PCM),强化传热,非均匀翅片,数值模拟,
keywords:solar thermal power generation,cascaded latent heat thermal energy storage (CLH-TES),phase change material (PCM),heat transfer enhancement,uneven fins,numerical simulation,
发表日期：2022-02-28
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