On the basis of new and existing residential buildings around Europe, several studies have been carried out by Velux A/S and CSTB to show the effect of passive cooling systems for reducing cooling demand and optimizing the indoor climate by use of intelligent roof windows systems. The studies were made for typical existing and low energy residential buildings at several locations in France, Spain, Italy and Germany. In this paper, the results from the latest study will be presented. The technology studied is an "intelligent" roof window which optimizes the use ofpassive solar gain, daylight availability and natural ventilation to keep a good indoor climate, while reducing the need for cooling and heating. The system activates an insulation shutter when needed, thus reducing the heating requirement during the heating season while optimizing the daylight conditions. During the cooling season, when shading is needed, the intelligent and passive window system will activate natural ventilation through the windows or/and the solar shading, thus optimizing the indoor climate while reducing the requirement for cooling.
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机译：Velux A / S和CSTB在欧洲各地新的和现有的居民建筑的基础上，进行了几项研究，以显示被动冷却系统通过使用智能天窗系统减少冷却需求并优化室内气候的效果。这项研究是针对法国，西班牙，意大利和德国的多个地点的典型现有低能耗住宅建筑进行的。本文将介绍最新研究的结果。所研究的技术是“智能”屋顶窗，可优化被动式太阳能获取，日光利用率和自然通风的使用，以保持良好的室内气候，同时减少对制冷和供暖的需求。该系统在需要时启动隔热百叶窗，从而减少采暖季节的采暖需求，同时优化日光条件。在冷却季节，需要遮阳时，智能和被动式窗户系统将激活通过窗户或遮阳遮阳的自然通风，从而在降低制冷需求的同时优化室内气候。
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