【作者】 刘学来；

【导师】 张强； 李永安；

【作者基本信息】 西安建筑科技大学 ， 供热、供燃气、通风与空调工程， 2004， 硕士

【摘要】 随着经济的发展和人民生活水平的提高，采暖空调建筑正在迅猛增长，建筑能耗急剧上升。目前，我国采暖空调能耗已占到总能耗的1／3左右。采取有效措施，将建筑能耗降下来，对于我国建筑业的可持续发展，缓解我国能源供求紧张局面具有重要意义。 本文题目是山东省科研基金资助课题《建筑热桥的动态特性及能耗分析》（编号J03L06）的子课题。本文在阐述建筑围护结构耗热原理以及影响建筑能耗因子的基础上，采用数值模拟方法，探讨了建筑热桥传热的基本机理和影响建筑热桥传热的因素，进而对建筑热桥在围护结构传热中的影响范围进行了综合分析和计算，研究了构造柱热桥型式对建筑外墙能耗的影响，得出了构造柱在满足建筑受力面积要求的情况下，内凸构造柱较外凸构造柱略能减少散热量的结论，但是凸出过大（＞100mm）无论内凸还是外凸对建筑耗热都没有大的差别。 在数值计算中，采用ANSYS软件，求出了4种典型热桥的内部温度分布及通过热桥和周围外墒的热流量。给出了热桥对建筑外围护结构的影响区域，对于构造柱热桥其影响范围为热桥边沿向外100mm，热流量最大的位置在于热桥与外墙交界处。通过分析计算，提出了外墙外保温较为理想的方式是在建筑热桥外侧实行热桥外延 些竺么巴些』止生丛竺叁立_<sub>100mm加厚保温，然后再对整个建筑外墙整体保温。最后通过实验验证了对建筑热桥理论分析的正确性。 在分析常见建筑保温特点的基础_<sub>卜，提出减少建筑耗能量的最佳措施为外墙外保温，利用ANSYS软件模拟计算并经过经济分析，得出了建筑外围护结构采用聚苯板作为保温材料的最佳保温厚度为热桥部位是（25+25）mm，建筑外墙部位为25mm，这样即可满足建筑节能50%的要求，同时一还介绍了常用的保温材料及做法，经过经济分析得出建筑外保温技术不仅能节约较多的能源，同时也创造了较好的经济效益。更多还原

【Abstract】 With the developing of economic and the rising of people’s life level, the building witli healing energy consumption is rising sharply. At present ,the heating energy consumption takes one third of the entire energy consumption. So take effective measure to reduce building energy consumption is of great importance to keeping develop and ease the urgent complexion of supply and demand.The subject is a sub subject of a fund subsidy subject of scientific research of Shandong Province, which is "The thermal bridge of building dynamic characteristic and energy consumption analysis"(Number:J03L06). On the basis of expound the theory of building exterior-protected construction energy consumption and the gene of influence the building energy, set up mathematics model, this article discuss the mechanism of dispelling the heat of the buildings’ thermal bridge and the complication that influence it, and then synthetic analysis and calculate the influence range of building thermal bridge in exterior-protected construction column thermal bridge to the building outer wall get the conclusion that when the construction column can satisfy the building stress-area, in bulgy construction column dispel less heating than out bulgy construction column. But if the pole stuck out more than 100mm, in bulgy or out bulgy make no difference.In the mathematic calculation, adopt ANSYS software, get four representative thermal bridges’ internal temperature distribution and heat-flux get through the thermal bridge and the around outer wall. Present thermal bridge influence area to the building out exterior-protected construction. For the construction column thermal bridge, the influence area increase 100mm along the thermal bridge. The position of maximum heat-flux is between the thermal bridge and the outer wall. Through analysis and calculate, advance the optimal method of exterior heat preservation of outer wall is add 100mm thicken along the thermal bridge, then take heat preservation measure for the whole outer wall. At last ,validate the analysis of building thermal bridge is right through experiment.On the basis of analysis familiar heat preservation peculiarity, advance the best way to reduce building energy consumption is exterior heat preservation of outer wall. Adopt ANSYS software, mimic calculate and then economy analysis, work out that building outer exterior-protected construction. Adopt poly phenyl board as heat preservation materials, and the best heat preservation thickness for thermal bridge is (25+25)mm, for outer wall is 25mm. In this way, it can save 50 percent energy, and at the same time introduce heat preservation materials and the way to use it in common.Through economy analysis it can be known that building outer heat preservation technology not only save more energy, but also create economic benefit.更多还原