夏热冬冷地区外墙保温装饰一体化系统热工性能及热桥研究

发布时间：2018-06-27 18:57

本文选题：夏热冬冷地区 + 节能　；参考：《安徽建筑大学》2014年硕士论文

【摘要】：我国建筑能耗与其他气候相近的发达国家相比，能耗较高；有数据显示在建筑能耗中约有50%的能耗是由围护结构的设置及使用不合理造成的。而外墙在整个围护结构中占有的面积最大，通过外墙散失的冷热量所占的比例就很大；因此，通过外墙保温是实现建筑节能的一种很重要的方式。目前外墙保温做法有很多种，针对夏热冬冷地区而言，要同时满足夏季隔热冬季保温及节能65%的目标，对墙体保温系统做法的要求比较高；而保温装饰一体化系统在保温隔热方面具有很大的优势，因此，本文主要研究墙体外保温中保温装饰一体化系统的热工性能及热桥对系统传热的影响，作为确定该一体化系统在夏热冬冷地区适用性的依据。本文主要分为以下几个部分进行研究和分析：首先本文阐述了目前市场上比较有代表性的保温装饰一体化板材，重点介绍了铝合金聚氨酯外墙保温装饰一体化板材的性能及施工方案，以及其在施工质量、工期及综合成本方面的优势。第三章主要介绍了外墙保温系统中保温装饰一体化系统和保温、装饰相互独立的干挂系统的典型构造；从理论计算角度对几种典型的外墙干挂系统的传热性能进行了分析，结果表明，一体化系统的传热系数与干挂石材、彩钢板相比较小，保温效果较好。第四章主要介绍了热桥的定义、危害；详细计算了一体化系统中膨胀螺栓以及宽度为50mm的复合龙骨对系统传热的影响。接下来分析了不同规格的复合龙骨及金属龙骨对传热系数的影响，并对实际工程中龙骨尺寸的选用提出建议。第五章主要介绍了一体化系统传热系数现场测试时的测试仪器、测试方法及现场布点方法；对三种不同构造系统的热流及温度进行了测量，并对最冷月、最热月的实测数据进行了处理；由计算结果结果得到保温效果较好的系统构造做法。第六章利用fluent软件对有龙骨和有空气间层（无龙骨）的一体化系统冬夏季的温度分布进行模拟，并分析指出两种工况温度分布的不同对系统保温效果的影响。
[Abstract]:Compared with other developed countries with similar climate, the building energy consumption of our country is higher, and some data show that about 50% of the building energy consumption is caused by the unreasonable installation and use of the enclosure structure. The external wall occupies the largest area in the whole enclosure structure, and the proportion of the cooling heat lost through the external wall is very large; therefore, the heat preservation through the external wall is a very important way to achieve building energy saving. At present, there are many kinds of exterior wall insulation practices. In the hot summer and cold winter area, the heat insulation and energy saving target of 65% should be met simultaneously, and the requirement of wall insulation system is relatively high. The thermal insulation system has a great advantage in heat preservation and heat insulation. Therefore, this paper mainly studies the thermal performance and the influence of heat bridge on the heat transfer of the heat preservation and decoration integration system outside the wall. As a basis for determining the applicability of the integrated system in hot summer and cold winter area. This paper is mainly divided into the following parts for research and analysis: firstly, this paper describes the representative heat preservation and decoration integrated plate on the market. This paper mainly introduces the performance and construction scheme of aluminum alloy polyurethane exterior wall heat preservation and decoration integrative plate, as well as its advantages in construction quality, construction period and comprehensive cost. The third chapter mainly introduces the typical structure of the thermal insulation and decoration integration system and the dry hanging system which is independent of each other in the external wall insulation system, and analyzes the heat transfer performance of several typical external wall dry hanging systems from the angle of theoretical calculation. The results show that the heat transfer coefficient of the integrated system is smaller than that of the dry hanging stone and the color steel plate, and the thermal insulation effect is better. In chapter 4, the definition and harm of thermal bridge are introduced, and the effects of expansion bolts and composite keel with width of 50mm on the heat transfer of the system are calculated in detail. Then, the influence of composite keel and metal keel on heat transfer coefficient is analyzed, and suggestions on the selection of keel size in practical engineering are put forward. The fifth chapter mainly introduces the testing instrument, test method and spot arrangement method of the heat transfer coefficient of the integrated system, and measures the heat flux and temperature of three different structural systems, and the coldest moon, the coldest moon and the coldest moon. The measured data of the hottest month were processed and the system construction method with better thermal insulation effect was obtained from the calculated results. In chapter 6, the temperature distribution in winter and summer of the integrated system with keel and air interlayer (without keel) is simulated by using fluent software, and the influence of different temperature distribution in two working conditions on the thermal insulation effect of the system is pointed out.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU761.12;TU111

【共引文献】