北京写字楼采用Low-E玻璃窗的能耗与经济性分析

本文首先介绍了Low-E玻璃的节能特性以及其传热模型,并利用DeST-c软件,模拟计算了北京某写字楼采用6种不同类型玻璃窗方案下的逐时自然室温变化和能耗情况,分析了季节、朝向对玻璃窗方案的影响。而后在能耗分析的基础上,选出较节能的单一及组合式玻璃窗方案,将其分别与普通中空玻璃窗方案在初投资及运行费用方面进行经济性分析比较。结果显示,采用组合式玻璃窗方案:低透型Low-E玻璃窗(东、西向) 普通中空玻璃窗(南、北向),其初投资虽比普通中空玻璃窗高59.39%,但每年可节省电量7.42%,故只需经过2年就可以将超出的初投资全部收回,且其初投资风险相对较低,是该写字楼的首选方案。

Analysis on Energy Consumption and Economy of an Office Building Equipped with Low-E Window in Beijing

In this paper,the energy efficiency performance and heat transfer model of Low-E glass were firstly introduced.And then,under six different kinds of glass window conditions,the software of DeST-c was used to simulate the hourly indoor air temperature,energy consumption of an office building in Beijing,also the influences of different seasons and orientations on window types were compared.Thirdly,based on the analysis of energy consumption,the investment and operation cost of the selected window,such as single and assembled windows,and common double window were analyzed and compared.The results indicated that the investment of the assembled window was 59.39% higher than that of the normal one,while the power of 7.42% could be saved each year.As a result,the overspend part of the investment could be took back in only two years.In a conclusion,with the relatively lower investment risk,the assembled window would be the first choice of this office building.