高効率の被動的な昼間放射冷却のための階層的に多孔なポリマーコーティング
Jyotirmoy Mandal1, Yanke Fu1, Adam C Overvig1
1Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, USA.
まとめ
この研究は,先進的な受動的な昼間放射冷却 (PDRC) コーティングを作成するためのシンプルでスケーラブルな方法を紹介しています. これらのコーティングは効率的な冷却を提供し,従来の電気冷却方法の有望な代替手段を提供します.
科学分野:
- 材料科学
- ナノテクノロジー
- 持続可能なエネルギー
背景:
- パッシブ・デイタイム・レイディエティブ・クーリング (PDRC) は,自然発熱メカニズムを利用した電気冷却のエネルギー効率の高い代替手段です.
- 既存の PDRC 技術は,効率性,スケーラビリティ,または適用性においてしばしば制限に直面しています.
- 費用対効果の高い高性能PDRC材料の開発は,その普及に不可欠です.
研究 の 目的:
- 高性能のPDRCコーティングを製造するためのシンプルで安価でスケーラブルな方法を開発する.
- 開発されたPDRC材料の光学特性と冷却性能を特徴付ける.
- 新しい PDRC 技術の可能性を,電気冷却の有効な代替手段として実証する.
主な方法:
- 階層的に多孔性のポリ・ビニリデン・フッ化物・コ・ヘクサフッ化プロペン (P・VdF・HFP) <サブ>HPサブ>のコーティングを相逆法で製造する.
- 半球の太陽反射と長波の赤外線放射の測定
- シミュレートされた太陽光照射下での環境下温下降と冷却力の評価
主要な成果:
- 半球的な太陽反射率 (0.96 ± 0.03) と長波赤外線放射率 (0.97 ± 0.02) を得ている.
- 周囲の温度が約6°C下がっていることが証明された.
- 890Wm−2と750Wm−2の太陽光強度で,約96ワット/平方メートル (Wm−2) の冷却力を得ている.
- 性能は最先端のPDRC設計に匹敵するか,それを上回ります.
結論:
- フェーズ・インバーション・メソッドは,PDRCコーティングへのシンプルでスケーラブルで費用対効果の高い経路を提供します.
- P ((VdF-HFP) <サブ>HPサブ>コーティングは,実用的な用途に適した優れたPDRC能力を発揮しています.
- 製造技術の塗料のようなシンプルさは,簡単に実装し,広く適用できるようにします.
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