【作者】 尹秀琴；

【导师】 李惠强；

【作者基本信息】 华中科技大学 ， 工程管理， 2010， 博士

【摘要】 建筑节能是国家节能减排的重要环节之一,外墙保温可以提高建筑围护结构的保温隔热性能,降低建筑能耗。但目前市场上外保温技术品种、材料及生产厂家较多,性能及质量参差不齐,因此对外墙外保温系统性能及综合质量进行深入评价研究具有一定的理论意义和工程应用价值。本文研究的内容及主要成果如下：1、针对胶粉聚苯颗粒、EPS聚苯板、复合灌注聚氨酯硬泡三种常用外墙外保温系统的保温隔热性能分别运用Ansys软件和Energyplus能耗模拟软件进行了分析。在冬季和夏季不同环境温度下,用Ansys软件分析外保温系统的热传递效应,表明三种外保温系统均有良好的保温隔热性能,并依次提高,以聚氨酯为最优。用Energyplus能耗模拟软件分析建筑的能耗,表明三者的建筑能耗依次降低,两种方法分析的结果具有一致性。两种分析结果还表明,所采用的保温材料的厚度是决定保温隔热性能的最主要控制因素。2、参照规范设定的外保温系统的耐候性试验条件,研究了三种外保温系统在耐候性试验过程中,外保温系统层间粘结强度的历时变化过程,在加热-淋水循环模拟冬季环境条件下,三者的粘结强度总体均呈平稳下降趋势。在加热-冷冻循环模拟冬季环境条件下,EPS板外保温系统的粘结强度呈明显下降趋势,表明EPS板外保温系统在寒冷地区的耐候性较差,另外两者的粘结强度下降速率变化不大,表明在寒冷地区有较好的耐候性。此外,还分析了外保温系统的防火安全性、抗震性、施工质量保障性及经济性,提出了相关的改进建议。3、运用系统可靠度分析的FTA方法,结合国内工业及民用建筑可靠度鉴定的方法标准,构建了外保温系统质量综合评价模型,分析了影响外保温系统质量的相关因素及其间的逻辑关系,明确了外保温系统质量缺陷或事故可能发生的路径,应控制的主要环节,并研究提出了基于FTA方法外保温系统的质量分级评价的方法和标准,对外墙外保温系统工程质量评价具有指导意义。更多还原

【Abstract】 Building energy efficiency is an important part of the country’s energy saving and emission reduction project. External wall thermal insulating technology can improve the thermal insulation properties of building envelope, and reduce building energy consumption. But in the current market there are many kinds of external wall thermal insulating technologies by using varieties of method statements and heat insulating materials which are made by different manufactures, so the property and quality of each thermal insulating technology are irregularity and have different effects. Therefore, the detailed study and evaluation on the property and overall quality of external thermal insulation system (ETIS) have certain theoretical meaning and project application value. In this thesis the research content and main achievements are as follows:Firstly, Ansys software and Energyplus energy simulation software were used to analyze the performances of thermal insulation of three kinds of prevailing ETIS, which are polystyrene granule mortar, expanded polystyrene (EPS) board, and polyurethane foam ETIS. Under different ambient temperature conditions in summer and winter, after analyzing the heat transfer effect of three kinds of ETIS by using Ansys software, the result indicates that they all have good heat preservation and heat insulation capabilities, and in turn improves, the best is polyurethane foam ETIS. With Energyplus energy consumption simulation software analyzed and the result shows that the energy consumption in turn reduces. The results of two methods are consistent; moreover, the results show that thickness of thermal insulation material is the key control factor for thermal insulation performance of ETIS.Secondly, with reference to specification of testing conditions of atmospheric exposure tests, studied the change laws of adhesive strength of three kinds of ETIS with time. With the conditions of high temperature-spraying water cycle simulating summer environment, the downtrend of adhesive strength of three kinds of ETIS were all smooth and steady. While under the conditions of heating-refrigeration cycle simulating winter environment, the downtrend of adhesive strength of EPS board ETIS decreased obviously, and this indicats that in cold areas the weatherability of EPS board ETIS is poorer than the other two ETIS, and this shows that the weatherability of EPS board of ETIS was worse than the other two ETIS in cold areas; The lowering rate of adhesive strength for the other two ETIS had a little change under heating-refrigeration cycle, and this shows that these two ETIS have better weatherability in cold areas. In addition, in this thesis also analyzed the fire safety, earthquake-resistant, constructability and economy of ETIS and finally put forward relevant suggestions for improvement.Finally, the evaluation model of quality evaluation of ETIS was established based on the theory of fault tree analysis (FTA) and the reliability appraisal standards of industry and public building, and then analyzed the relevant factors influencing the quality of ETIS and their logical relation, clarified the possible reasons which causing quality defect or fault and which parts should take control measures, and proposed the evaluation method and criteria of ETIS quality grade based on FTA. The results have a significant instruction function for evaluation of ETIS quality.更多还原