集成相变材料和反射隔热涂料的节能屋顶研究

发布时间：2018-03-04 12:09

  本文选题：节能屋顶　切入点：PE-RT管　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：相变材料和反射隔热涂料应用于建筑领域,能够有效降低建筑能耗,提高室内热舒适性。本文旨在研究一种集成相变材料和反射隔热涂料的节能屋顶,具体包括相变材料的配制和封装方法、屋顶的设计和建造方案、实体实验房间测试分析及Trnsys传热模型的建立等内容。本文首先阐述了节能屋顶的隔热原理。根据相关规范选择了合适的反射隔热涂料,并以高级脂肪酸和高碳醇为原料,利用低共熔混合原理和DSC测试配制了合适的相变材料。为了满足相变材料的使用要求,又设计了以PE-RT管为组件,采用热熔连接而成的相变材料封装装置。依据节能屋顶的隔热原理确定了屋顶的设计和建造方法,屋顶由内至外依次为屋顶基础层、防水层、粘结砂浆层、相变层、抗裂砂浆层和反射涂料层。为了测试分析节能屋顶的性能,搭建了1#(PCM屋顶)、2#(CR屋顶)、3#(PCR屋顶)三间全尺寸实验房间。在密闭门窗(减少外界干扰因素)的状况下,分别测试了室外气候参数,屋顶温度及热流等参数。通过对比分析发现,节能屋顶相比其他屋顶,屋顶内表面峰值温度平均降低了0.26℃~0.58℃,峰值热流密度平均降低了1.28 W/m2~2.85W/m2,屋顶内表面温度与室外温度、太阳辐射等参数的相关性系数降低了4.36%~50.48%。充分证明了节能屋顶既具有良好的隔热效果,又具有良好的效屏蔽外界环境影响的能力。为弥补实验的局限性,指导节能屋顶的设计和研究工作,本文基于Trnsys建立了节能屋顶的传热模型。通过与实验结果进行误差分析和B-A一致性分析,发现模拟值和实测值一致性吻合程度在91.94%~97.22%之间,证明了所建立的模型具有较高的准确性。最后,利用所建立的模型模拟了普通屋顶的传热状况,通过与实验房间的实测结果对比,发现节能屋顶日传热量较普通屋顶平均降低了17.89%。
[Abstract]:The application of phase change material and reflective heat insulation coating in the field of building can effectively reduce building energy consumption and improve indoor thermal comfort. The purpose of this paper is to study a kind of energy-saving roof which integrates phase change material and reflective heat insulation coating. Including the preparation and packaging of phase change materials, the design and construction of roofs, In this paper, the heat insulation principle of energy-saving roof is first expounded. According to the relevant specifications, appropriate reflective heat insulation coatings are selected, and high fatty acids and high carbon alcohols are used as raw materials. A suitable phase change material was prepared by low eutectic mixing principle and DSC test. In order to meet the requirements of phase change material, a PE-RT tube was designed. According to the heat insulation principle of energy-saving roof, the design and construction method of roof is determined. The roof is divided from inside to outside in order of base layer, waterproof layer, bonded mortar layer, phase change layer, etc. Anti-cracking mortar and reflective coatings. In order to test and analyze the performance of energy-saving roofs, three full-size experimental rooms were built on the 1 #PCM roof and the #2 #2CR roof and the PCR roof. Under the condition of closed doors and windows (reducing external interference factors), The outdoor climatic parameters, roof temperature and heat flux were measured respectively. The results showed that the peak temperature of the interior surface of the energy-saving roof was 0.26 鈩，

本文编号：1565582