浅谈建筑外窗热工的计算方法

进入21世纪后节约能源已经是全世界共同关注的问题，我们国家针对我国的国情，对建筑外窗的节能指标也提出了更高的要求。以北京为例，《北京市标准住宅建筑门窗应用技术规范》要求建筑外窗的传热系数不能大于2．8W／（m^2·K），如何才能达到这个指标？又如何计算外窗的传热系数呢？本文将以一个标准的外窗为例，介绍一种外窗传热系数的计算方法。

Analysis on thermal calculation method of building exterior windows

Since entry into the 21st Century, the topic of ＂Saving Energy ＆ Resources＂ has become the focus of attention worldwide, especially aiming at the situation of China, much higher requirements have been made to the energy-saving index of building exterior windows. For instance, in Beijing, as per 《Application Specifications on Standardized Residence Building Doors and Windows in Beijing》, coefficient of heat transmission of building exterior windows is requested to be no less than 2.8 W/（m^2. K）, so how can we reach this index to meet the requirement？ How can we make calculations on coefficient of heat transmission of building exterior windows？ The assay is going to take a further introduction on the heat engineering calculation method of building exterior windows with an example of a standardized exterior window.