热致变色窗是一种新型的开窗方式，通过在两块玻璃之间层压一层特殊的薄膜，自动改变太阳能的传输。这种特殊的薄膜可以自行变暗，其暗度由直接的太阳辐射影响玻璃和窗格玻璃之间的间隙温度决定。进行了一个实证示范项目，以评估热变色窗模型与高性能低性能窗模型的全年建筑节能性能- e暗色调窗户模型，在爱荷华州中部的天气条件下，使用自动调光控制的轻型商业建筑环境。扣除两个演示系统之间平均每年5.6%的标准化误差后，结果表明，与测试中的高性能low-e深色窗户相比，热致变色窗户每年平均可节省约4%的建筑总电量。照明节能是显著的，因为由于自身的原因，热致变色窗口允许增加可见光的数量- 深色。然而，这项工作的重点是评估热变色窗户的节能，而不考虑眩光和太阳能保护。未来的研究需要与阴影选项进行节能比较。引文:ASHRAE交易——第120卷，第一部分，纽约州纽约

Thermochromic windows are a new type of fenestration that automatically change the solar transmission by a special thin film laminated between two panes of glass.This special film can self-darken and its darkness is governed by the direct solar radiation impacting the glazing and interstitial temperature between the panes. An empirical demonstration project was conducted to assess the year-round building energy performance of a thermochromic window model compared to a highperformance low-e dark tinted window model in a light commercial building environment that uses automatic dimming control under central Iowa weather conditions. After discounting the average annual normalization error of 5.6% between the two demonstration systems, results show that on a yearly average, the thermochromic windows can save approximately 4% total building electricity compared to the high-performance low-e dark tinted windows under test. Lighting energy savings is significant due to the increased amount of visible light thermochromic windows allow because of the self-darkening tint. However, this work is focused on assessing energy savings of the thermochromic windows without considering glare and solar protection. Energy savings comparison with shadingoptions is needed for future research.