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Numerical research on performance comparison of multi-layer high temperature latent heat storage under different structure parameter

机译：不同结构参数下多层高温潜热储存性能比较的数值研究

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摘要

A series of two-dimensional axis models with structure mesh were created to simulate the charging process inside a multi-layer latent heat storage system (LHTES) that applied in disk solar thermal power system. 60% NaNO3 mixed with 40%KNO3 were taken as phase change materials (PCMs). PCMs were separated into three ring-shape volume, which made it necessary to balance the heat transfer of the three volume and maximize the proportion of latent heat in energy storage. The phase change material reserves, liquid fraction, latent heat fraction (the proportion of latent heat in total absorbed energy), volume difference of melting fraction (parameter defined to describe the melting difference between three volumes) and volume difference of latent heat fraction (parameter defined to describe the latent heat fraction difference between three volumes) of 4 models with different structure parameter were taken into comparison. The result showed that the phase change material reserve reach to max, melting difference and latent heat fraction difference are minimum when the thickness ratio of the three volume in radial direction are 11:18:8 (when volume ratio was 231:1044:736). The best configuration made the ratio of heat exchange area to heat storage volume optimum and made the heat transfer for charging process close to balance in three volumes. (C) 2020 Elsevier Ltd. All rights reserved.
机译：创建了一系列具有结构网格的二维轴模型，以模拟应用于磁盘太阳能热电系统中的多层潜热存储系统（LHTES）内的充电过程。将60％纳米3与40％KNO3混合作为相变材料（PCM）。 PCM分为三个环形体积，这使得必须平衡三个体积的传热并最大化能量储存中潜热的比例。相变材料储备，液体分数，潜热级分（潜热的总吸收能量比例），熔化级分的体积差（定义为描述三个体积之间的熔化差异）和潜热级分的体积差异（参数定义为描述具有不同结构参数的4个型号的三个体积之间的潜热分数差异。结果表明，当径向三体积的厚度比为11：18：8（当体积比为231：1044：1044：736）时，相变材料储备达到最大值，熔化差和潜热部分差是最小的最小值。最佳配置使热交换区域与储热量的比率最佳，使热传递用于充电过程接近三个体积的平衡。 （c）2020 elestvier有限公司保留所有权利。

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  • 来源
    《Renewable energy》 |2020年第8期|131-141|共11页
  • 作者

    Li Peisheng; Li Zhihao; Zhang Ying; Li Wenbin; Chen Yue; Lei Jie;

  • 作者单位

    Nanchang Univ Sch Mechatron Engn Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Sch Mechatron Engn Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Sch Mechatron Engn Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Sch Mechatron Engn Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Sch Mechatron Engn Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Sch Mechatron Engn Nanchang 330031 Jiangxi Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    LHTES; Multi-layer storage; Enthalpy porosity method;

    机译：LHTES;多层存储;焓孔隙度法;

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