用于高效的日间被动辐射冷却的等级多孔聚合物涂层
Jyotirmoy Mandal1, Yanke Fu1, Adam C Overvig1
1Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, USA.
概括
这项研究介绍了一种简单可扩展的方法,用于创建先进的被动日间辐射冷却 (PDRC) 涂层. 这些涂层提供了高效的冷却,为传统的电冷却方法提供了有希望的替代方案.
科学领域:
- 材料科学
- 纳米技术
- 可持续能源
背景情况:
- 通过利用自然散热机制,被动日间辐射冷却 (PDRC) 为电冷提供了节能替代方案.
- 现有的PDRC技术往往在效率,可扩展性或适用性方面面临限制.
- 开发具有成本效益和高性能的PDRC材料对于广泛采用至关重要.
研究的目的:
- 开发一种简单,廉价和可扩展的方法来制造高性能PDRC涂层.
- 描述开发的PDRC材料的光学性能和冷却性能.
- 展示新的PDRC技术作为电气冷却的可行替代品的潜力.
主要方法:
- 使用相位逆转方法制造等级多孔的聚乙烯化物-联合化) [P(VdF-HFP) HP涂层.
- 测量半球太阳反射率和长波红外发射.
- 在模拟太阳辐射下评估环境下温度下降和冷却功率.
主要成果:
- 实现了高半球基板独立的太阳反射率 (0.96 ± 0.03) 和长波红外发射率 (0.97 ± 0.02).
- 已经证明了大约6°C的环境温度下降.
- 在890Wm-2和750Wm-2的太阳能强度下,获得的冷却功率约为每平方米96瓦 (Wm-2).
- 性能与最先进的PDRC设计相匹配或超过.
结论:
- 阶段逆转方法提供了简单,可扩展和成本效益的PDRC涂层.
- 这种P ((VdF-HFP) HP涂层具有非常好的PDRC能力,适用于实际应用.
- 制造技术的简单性使其易于实施和广泛应用.
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