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Study of a phase change energy storage using spherical capsules. Part Ⅰ: Experimental results

机译:研究使用球形胶囊的相变储能。第一部分:实验结果

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摘要

This paper presents an experimental investigation of the performance of an encapsulated phase change energy storage during the charging and the discharging processes. The spherical capsules, containing water with a nucleation agent as a phase change material (PCM), fill the thermal storage tank. The heat transfer fluid which circulates through the tank and around the capsules is an aqueous solution of mono-ethylene glycol. A series of experiments were carried out to investigate the effects of various parameters including the inlet heat transfer fluid temperature and flow rate, kinetics of cooling and heating, on the charging and discharging processes. The main results are:rn1. There is a significant influence of the supercooling phenomenon during the charging process.rn2. The lower the inlet coolant temperature and the larger the coolant flow rate are, the faster the storage is. The choice of the couples (flow rate, inlet temperature) must permit to store the total energy in a given time.rn3. When a charge mode follows an incomplete discharge mode, the charge mode is the result of the crystallization of some capsules which present supercooling and of others which do not. The consequence is that the charge mode is made at a higher temperature with a relatively shorter duration.
机译:本文提出了在充电和放电过程中封装相变储能性能的实验研究。球形胶囊包含蓄热剂和水,其中的水含有成核剂作为相变材料(PCM)。循环通过罐和胶囊周围的传热流体是单乙二醇的水溶液。进行了一系列实验,研究了各种参数(包括入口传热流体的温度和流量,冷却和加热动力学)对充电和放电过程的影响。主要结果是:rn1。充电过程中过冷现象的影响很大。入口冷却液温度越低,冷却液流量越大,存储越快。耦合的选择(流速,入口温度)必须允许在给定时间内存储总能量。当充电模式遵循不完全放电模式时,充电模式是某些具有过冷状态的胶囊结晶而另一些没有过冷的胶囊结晶的结果。结果是在较高温度下以相对较短的持续时间进行充电模式。

著录项

  • 来源
    《Energy Conversion & Management》 |2009年第10期|2527-2536|共10页
  • 作者单位

    Laboratoire de Thermique, Energetique et Procedes, Universite de Pau et des Pays de l'Adour, Avenue de l'Universite, BP 1155, 64013 Pau cedex, France;

    Laboratoire de Thermique, Energetique et Procedes, Universite de Pau et des Pays de l'Adour, Avenue de l'Universite, BP 1155, 64013 Pau cedex, France;

    Laboratoire de Thermique, Energetique et Procedes, Universite de Pau et des Pays de l'Adour, Avenue de l'Universite, BP 1155, 64013 Pau cedex, France;

    Laboratoire de Thermique, Energetique et Procedes, Universite de Pau et des Pays de l'Adour, Avenue de l'Universite, BP 1155, 64013 Pau cedex, France;

  • 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

    liquid-solid phase change material; supercooling; charge mode; discharge mode; latent heat; experimental results;

    机译:液固相变材料;过冷充电模式;放电模式潜热实验结果;

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