相变蓄能墙多因素热特性分析及优化研究

发布时间：2018-01-15 06:35

本文关键词：相变蓄能墙多因素热特性分析及优化研究　出处：《建筑科学》2016年08期 　论文类型：期刊论文

【摘要】：建筑围护结构的热损失是建筑内部热量散失的主要途径。与传统墙体保温材料不同,相变蓄能技术可以利用潜热蓄能达到数倍于普通围护结构的蓄热和热惰性效果。该文针对我国北方地区夏季蓄冷,利用热焓法建立相变蓄能墙体物理模型并进行数值模拟,通过蓄热量、延迟性及熔化过程3个指标为依据来分析相变蓄能墙的因素影响特性。结果表明:夏季相变材料层设置在室内侧位置更有利;随着室内对流换热系数的增大,相变材料层的蓄热量随之增大,而延迟时间减小;相变材料层存在蓄热性能最优的最佳厚度;墙体材料和厚度的选择同样起到关键性作用,墙体材料厚度越大反而越不利于相变材料的蓄热性。该文所得出的优化结论对相变墙结构的优化与应用提供参考。
[Abstract]:The heat loss of building envelope structure is the main way of heat loss in building, which is different from the traditional wall insulation material. Phase change energy storage technology can use latent heat storage energy to achieve several times as much heat storage and thermal inert effect as ordinary envelope structure. This paper aims at summer cold storage in northern China. The physical model of phase change energy storage wall is established by enthalpy method and numerical simulation is carried out. Based on the three indexes of delay and melting process, the influence characteristics of phase change energy storage wall are analyzed. The results show that the phase change material layer is more favorable to the indoor side in summer. With the increase of indoor convection heat transfer coefficient, the heat storage of phase change material layer increases and the delay time decreases. The optimum thickness of the thermal storage property exists in the phase change material layer. The selection of wall material and thickness also plays a key role, and the greater the thickness of wall material is, the more unfavorable the heat storage of phase change material is. The optimized conclusion in this paper provides a reference for the optimization and application of phase change wall structure.
【作者单位】：河北工业大学能源与环境工程学院;河北工业大学土木与交通学院;
【基金】：国家自然科学基金资助项目“相变蓄热墙耦合太阳能热源蓄换热机理及辐射供暖特性研究”(51408184) 天津市自然科学基金资助项目“建筑相变蓄热内围护结构调温机理及效果研究”(15JCQNJC07800) 河北省教育厅优秀青年基金资助项目“被动式相变蓄能墙蓄换热机理及多因素耦合敏感性研究”(YQ2014005) 天津建委科技资助项目“被动房在高速沿线应用研究”(2015-13)
【分类号】：TB34;TU111.4
【正文快照】： [二次修回]2016-04-26助项目“被动房在高速沿线应用研究”(2015-13)0引言相变蓄能技术与围护结构相结合既能满足现代人们对轻质围护结构的需求,又能减少建筑能耗和提高室内热舒适[1-2]。国内外学者对其影响因素进行了分类研究。Kim和Darkwa[3]得出复合PCM-墙板系统相较于随机

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