呼吸蓄能式玻璃幕墙的研究与设计

Study and design of breathing-type glazing curtain wall with energy storage function

从构建低能耗建筑的理念出发,分析了建筑围护结构中隔热保暖的薄弱环节和传统幕墙在热工性能指标中的缺点,提出了一种新型的建筑围护结构——呼吸蓄能式玻璃幕墙。并在深入研究传统热通道幕墙热工计算模型的基础上,建立了呼吸蓄能式玻璃幕墙的热工计算模型。再结合具体实例的计算结果,对其各项性能指标进行了详细的分析研究,结果表明:呼吸蓄能式玻璃幕墙冬夏两季的内窗传热系数均小于1 W.m-2.K-1,明显优于传统热通道玻璃幕墙;冬夏两季的传热延迟时间分别达到了传统幕墙的2倍和3倍;太阳辐射强度大、风速小的地域不利于呼吸蓄热式玻璃幕墙的夏季隔热和延迟传热时间,但对冬季保温和延迟散热时间却十分有利;并具有改造简单、围护方便等特点,对未来玻璃幕墙的发展具有十分重要的意义。

In this paper, a new envelope of buildings, the breathing-type glazing curtain wall with energy storage function, is put forward based on the concept of low-energy consumption buildings, and the analysis on the bottleneck related to prevent heat loss in enclosed structures of building and the weakness concerned with thermal performance of building envelopes. The structure is studied and designed. Considering the energy conservation of traditional glazing curtain wall with thermal channel, a new thermal calculation model for breathing-type glazing curtain with energy storage function is established. Combined with the calculation results of engineering examples, the characteristic parameters of the new envelop is analyzed in detail. The results show that heat transfer coefficients of the new envelop in winter and summer are within 1 W ~ m-2 ~ K-1 and superior to those of traditional glazing curtain wall with thermal channel. The time of heat lag in summer and winter is triple and twice that of traditional curtain wall. In the region with heavy solar radiation intensity and small wind speed, the heat insulation and time of heat lag in summer are worse, but it is helpful to heat preservation and time of heat lag in winter. The new envelop has the characteristics of simple structure and easy operation, which may be helpful to the development of glazing curtain wall in the future.