适应温度的屋顶覆盖与太阳和热辐射的协同调节,以最大限度的节能
Jiale Chai1, Jianheng Chen2, Zhanxiao Kang1
1School of Fashion and Textiles, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China.
iScience
|August 9, 2023
概括
这项研究引入了一种新型的屋顶覆盖,可以适应表面温度,提高建筑物的能源效率. 这种创新材料同时调节太阳和热辐射,全年节省能源.
科学领域:
- 建筑科学 建筑科学
- 材料科学 材料科学 材料科学
- 可持续能源 可持续能源
背景情况:
- 建筑气候控制的全球能源消耗量很大,达到全球初级能源消耗量的20%.
- 通过调节太阳能和热辐射,被动屋顶技术为建筑节能提供了潜力.
- 目前的被动屋顶解决方案缺乏适应表面温度的能力,限制了它们在节能方面的有效性.
研究的目的:
- 开发一种带有自适应太阳能和热辐射调制的被动屋顶覆盖.
- 解决现有技术的局限性,这些技术无法应对屋顶表面温度变化.
- 为了实现辐射性质的协同调节,以提高建筑节能.
主要方法:
- 开发一种可扩展的金属化聚乙烯薄膜,用于屋顶应用.
- 电影的太阳吸收率和热发射率调节能力的表征.
- 建筑能源模拟以评估适应性屋顶覆盖在不同气候中的性能.
主要成果:
- 开发的屋顶覆盖表现出显著的太阳吸收率调节 (72.5%) 和热发射率调节 (79%).
- 这些调制发生在典型的室内加热 (22°C) 和冷却 (25°C) 设置点之间的温度变化.
- 该材料表现出适应温度的特性,这对于优化辐射传热至关重要.
结论:
- 表面温度适应性屋顶覆盖为减少建筑能耗提供了一个有前途的解决方案.
- 作为对表面温度的反应,协同的太阳能和热调制增强了节能潜力.
- 该技术预计将在全球各个气候区域提供全季节能节省.
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