被动式建筑外墙理想导热系数确定方法与理解  

作　　者：张宇 

机构地区：[1]中国建筑科学研究院有限公司建筑设计院,北京100013

出　　处：《科技创新导报》2020年第16期168-170,共3页Science and Technology Innovation Herald

基　　金：国家重点基础研究发展计划《蓄能释能过程与主动蓄能项目》(项目编号:2010CB227305)。

摘　　要：建筑能耗巨大,外墙热工性能对建筑性能有重要影响。传统的墙体热工性能研究多采用数值计算的方法,只关注线性系统,忽略了墙体热工性能随温度的变化。本文基于被动式理想节能建筑的概念提出了一种确定被动式建筑外墙最优导热系数的方法。研究发现,建筑外墙的热物性(导热系数)应该根据室外温度自我调节。北京地区一被动式房间的优化结果表明外墙理想的导热系数随温度分布接近方波函数。The energy consumption of buildings is huge and the thermal properties of external walls have an important influence on building performance.Traditional researches on the subject,where numerical methods are always used,focus on linear systems and neglect the variation of the wall’s thermal properties with temperature.The approach solves an inverse problem under the concept of passive ideal energy-saving buildings to obtain ideal distribution of thermal conductivity with temperature of external wall.The thermal physical properties (thermal conductivity) of building external walls should be self-regulated according to the outdoor temperature.The result for a typical passive room in a whole year in Beijing shows the ideal thermal conductivity distribution of external wall is a square wave function.

关 键 词：建筑节能 建筑外墙 导热系数 非线性优化 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]