基于毛细管封装相变材料的相变墙板性能研究

发布时间：2018-01-05 09:21

本文关键词：基于毛细管封装相变材料的相变墙板性能研究　出处：《苏州科技学院》2014年硕士论文　论文类型：学位论文

【摘要】：我国目前大部分建筑都属于高能耗建筑,单位面积建筑能耗为发达国家的3-5倍。降低建筑能耗,已成为节能降耗的主要目标之一。建筑能耗中,围护结构引起的能耗最大。在围护结构中添加合适的相变储能材料,利用材料相变时吸热和放热,可以实现室内负荷的转移,降低室内负荷,减小室内温度波动,提高热舒适性。本文利用石蜡和十水硫酸钠作为相变储能材料,采用毛细管封装的方法,结合石膏制成了相变储能墙板。对上述储能墙板的储能效果及影响墙板储能的因素进行了研究,主要内容如下：测量了实际墙体在夏季几个代表日工况下其内外壁以及室内外的温度响应,经过统计计算,得出夏季工况的平均值,以此作为后续研究的依据。分析了相变储能墙板的传热过程,通过实验验证,确定了后续实验的模拟条件。筛选石蜡和十水硫酸钠作为储能介质,根据相变储能温度范围配置了石蜡混合液和十水硫酸钠混合液。制备了多种毛细管封装相变储能墙板,探究了此方法的可行性与可靠性。分析了毛细管封装相变材料时,毛细管管径、壁厚、导热性以及相变材料的含量、导热性能等对相变储能墙板总热阻、热容量和相变时间的影响。采用高低温交变试验箱模拟实际墙体内壁温度,实验研究相变储能墙板另一侧的温度响应。与纯石膏板做对比,探究了相变材料、相变温度、相变材料含量以及毛细管管径等因素对相变储能墙板实际效果的影响。搭建了石蜡相变储能房屋模型、十水硫酸钠相变储能房屋模型以及纯石膏板房屋模型,探索相变储能房屋模型在全天封闭、全天通风以及白天封闭夜间通风三种工况下的储能效果。本文的主要研究结论：毛细管封装相变材料简单可靠,与石膏结合方便；石蜡混合液和十水硫酸钠混合液通过调整混合比,可以得到广泛的相变温度区间；相变材料的导热性和含量对相变储能墙板的总热阻有重要影响,而毛细管的管径、壁厚、导热性以及相变材料的相变温度对相变储能墙板总热阻的影响较小；相变储能墙板的热容量主要有相变材料的相变潜热和含量决定；相变储能结合夜间通风节能效果最好。
[Abstract]:At present most of the buildings are high-energy buildings, building energy consumption per unit area is 3-5 times that of developed countries. To reduce building energy consumption, has become one of the main goals of saving energy and reducing consumption. Building energy consumption, energy consumption caused by the maximum envelope. Add phase change materials suitable in the envelope, using phase change material for heat absorption and heat, can realize the transfer of the indoor load, reduce indoor load, reduce the indoor temperature fluctuations, improve thermal comfort. Using paraffin and ten water sodium sulfate as phase change material, using the method of capillary packaging, combined with plaster made of PCM Wallboard. The energy storage effect and the influence of wall the factors of energy storage wallboard, the main contents are as follows: the actual measurement on behalf of wall in the summer under several conditions in response to the outer wall, indoor and outdoor temperature, through statistical calculation The average value obtained, summer conditions, as a follow-up study basis. Analysis of the heat transfer process of phase change wallboard, through experimental verification, the simulation conditions of subsequent experiments determined. Screening of paraffin and ten water sodium sulfate as storage medium according to the phase change temperature range of the configuration of the paraffin mixture and ten sulfuric acid water sodium mixture. Preparation of various capillary packaging PCM Wallboard, explores the feasibility and reliability of this method. The capillary encapsulated phase change material, capillary diameter, wall thickness analysis, thermal conductivity and phase change material content, thermal conductivity of phase change wallboard thermal resistance and the effect of heat capacity and phase change time using high temperature test box to simulate the actual wall wall temperature, experimental study on phase change response on the other side wall temperature. Compared with pure gypsum board, explores the phase change material, phase change temperature, phase Effect of varying material content and capillary diameter and other factors to the actual effect of phase change wallboard. Build the paraffin wax phase change building model, ten water sodium sulfate storage house model and pure gypsum plate housing model, explore the PCM model in the closed house all day long, full day and night ventilation ventilation during the day and closed the three conditions the energy storage effect. The main conclusions of the paper are: capillary encapsulated phase change material is simple and reliable, convenient to combine with gypsum; paraffin mixture and ten water sodium sulfate mixed solution can be obtained by adjusting the mixing ratio, the phase transition temperature range is wide; has an important influence on the total thermal resistance thermal conductivity and the content of the phase change material of phase change wallboard the capillary diameter, wall thickness, thermal conductivity and phase transition temperature of the phase change material PCM Wallboard affected the overall thermal resistance of the heat capacity; phase change wallboard The phase change latent heat and the content of phase change materials are determined mainly, and the energy saving effect of phase change energy storage combined with night ventilation is the best.

【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB34;TU52

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