排风隔热窗的热工性能分析

Thermal Performance of an Exhaust Air Insulation Window

研究一种新型的建筑外窗结构——排风隔热窗,其由3层普通白玻璃、内置的遮阳百叶及玻璃之间的气流空腔构成。排风隔热窗是将室内空调排风通过玻璃间的气流空腔排到室外,利用空调排风低品位的冷量/热量减少外窗在供冷/供热季时形成的空调负荷,达到排风热回收的效果,同时它可以根据供冷/供热季的不同切换其排风通道。通过建立传热数学模型,对该结构和2种常规外窗结构在典型夏热冬冷气候条件下的节能效果进行分析比较。结果表明,排风隔热窗可以有效地降低室内侧玻璃表面与室内空气之间的温差,减少外窗形成的室内负荷,改善室内的热舒适性。

A novel triple glazing airflow window integrated with between-glass venetian blinds is pro-posed. One of the two air channels hosts blinds and is used for low-grade exhaust air flow from indoor to exterior environment, while the other acts like a double glazed pane. The air flow way can be switched from the outer channel （for cooling mode） to the inner one （for heating mode）. Based on energy balance, a nu-merical model is proposed for predicting the temperatures of the glass layers of this window configuration. Simulation is carried out to compare its thermal performances with that of the commonly used double and triple glazing windows. Results show that the exhaust air insulation window can reduce cooling and heating loads and enhance indoor thermal comfort.