階層的形態のメタファブリックは,スケーラブルな被動的な昼間放射冷却
Shaoning Zeng1, Sijie Pian2, Minyu Su1
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
Science (New York, N.Y.)
|August 6, 2021
まとめ
新しい織物メタファブリックは 気候変動と闘うために 効果的なパーソナル・サーモマネジメントを提供します これらの高度な繊維は,より広範な用途で従来の繊維よりも優れた冷却性能を提供します.
科学分野:
- 材料科学
- 繊維工学
- 熱力学について
背景:
- グローバル・気候変動は パーソナル・サーモマネジメントの 先進的なソリューションを必要とします
- 熱ストレスを軽減する 持続可能なアプローチを 提供しています
- 既存のテクノロジーは 広く採用できる性能やスケーラビリティが 欠けていることが多いのです
研究 の 目的:
- 放射性冷却のための大規模織物メタファブリックの開発と評価.
- 効率的な個人用熱管理のための材料の能力を実証する.
- 開発されたメタファブリックの商業的実現性と性能の優位性を評価する.
主な方法:
- 階層構造のメタファブリックの製造
- 光学特性の特徴 (放射性および反射性)
- 機械的特性 (強度,防水性,透気性) の評価
- 商業用繊維に対する冷却性能の現地試験
主要な成果:
- メタファブリックは,大気窓で高い放射性 (94.5%) と,太陽光スペクトルで高い反射性 (92.4%) を達成しました.
- この素材は,望ましい機械的強度,防水性,そして衣類に適した透気性を表しています.
- 実用試験では,綿の布よりも約4. 8°C低い冷却効果を示した.
- 拡張可能な産業用繊維製造ルートが確認されました.
結論:
- 開発された織物メタファブリックは,受動的な放射性冷却のための高性能を示しています.
- これらの材料は,個人用の熱管理に費用対効果があり,スケーラブルなソリューションを提供します.
- この技術は,インテリジェントアパレル,スマートテキスタイル,そしてより広範な気候変動への適応戦略に重大な利点をもたらします.
さらに関連する動画
12:08Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
Published on: July 18, 2015
10.9K
11:09Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh
Published on: June 23, 2017
10.4K
関連する概念動画
01:21Masonry in Cold and Hot Weather Conditions
162
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units...
Other key practices include keeping masonry units...
162
01:19Mechanism of heat transfer
1.5K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.5K
01:20Mechanisms of Heat Transfer II
3.7K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.7K
02:44Heating and Cooling Curves
24.9K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
24.9K
01:27Laminar Flow
1.5K
Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
1.5K
01:14Mechanisms of Heat Transfer I
5.1K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
5.1K