可持续的纤维素泡用于全天候高性能辐射冷却和建筑绝缘
Yunfei Bai1, Xiaohua Jia1, Zhiqiang Shan1
1School of Materials Science & Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science & Technology, Xi'an, Shaanxi 710021, PR China.
Carbohydrate polymers
|March 17, 2024
概括
使用可持续的聚乙烯醇和化纤维素开发了高性能被动白天辐射冷却 (PDRC) 泡. 这些环保材料实现了显著的环境下冷却,为能源减少提供了有前途的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续能源 可持续能源
- 纳米技术纳米技术
背景情况:
- 被动日间辐射冷却 (PDRC) 提供了一种可持续的零能源冷却解决方案.
- 从环保来源开发高性能PDRC材料对于减少全球能源消耗和二氧化碳排放至关重要.
- 目前面临的挑战包括使用可持续材料实现实用性和高性能.
研究的目的:
- 使用可持续和易于获得的材料开发高性能PDRC冷却器.
- 调查聚乙醇 (PVA) 和来自粉的化纤维素 (EC) 对于辐射冷却应用的潜力.
- 评估开发材料的冷却性能和节能潜力.
主要方法:
- 使用双交叉连接辅助单向冷干燥策略来制造PVA/EC (PEC) 泡.
- 应用防水表面改造以提高冷却性能.
- 描述了泡的导热率,太阳反射率,红外发射率和机械性能.
主要成果:
- PEC泡呈现出具有较低导热率 (26.2 mW·m−1·K−1) 的等级性宏孔结构.
- 实现了高太阳反射率 (95%) 和红外发射率 (0.97),以及超性和强大的机械性能.
- 在建筑模拟中证明了10.2°C的最大次环境温度下降,并预测了55.8%的节能.
结论:
- 开发的PEC泡是高性能被动白天辐射冷却的有希望的,可持续的材料.
- 这些材料提供出色的绝热和显著的冷却能力,有助于提高能源效率.
- 该研究为设计使用可持续资源的基于泡的新型辐射冷却器提供了灵感.
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