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相关概念视频

Radiation: Applications01:17

Radiation: Applications

1.2K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
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Radiation Pressure: Problem Solving01:09

Radiation Pressure: Problem Solving

363
The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force...
363
Mechanisms of Heat Transfer II01:20

Mechanisms of Heat Transfer II

3.2K
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...
3.2K
Thermal Sigmatropic Reactions: Overview01:16

Thermal Sigmatropic Reactions: Overview

2.1K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...
2.1K
Mechanism of heat transfer01:19

Mechanism of heat transfer

1.2K
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...
1.2K
Mechanisms of Heat Transfer I01:14

Mechanisms of Heat Transfer I

4.2K
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.
4.2K

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相关实验视频

Updated: Jun 30, 2025

Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation

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在辐射冷却技术中的材料.

Rong Liu1, Shancheng Wang1, Zhengui Zhou1

  • 1Department of Electronic Engineering, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, 999077, China.

Advanced materials (Deerfield Beach, Fla.)
|March 18, 2024
PubMed
概括
此摘要是机器生成的。

辐射冷却 (RC) 通过使用热辐射来冷却提供了一个可持续的解决方案. 本综述探讨了先进的RC材料,重点是设计策略和性能改进,以减少能源消耗.

关键词:
多功能材料多功能材料辐射冷却是一种辐射冷却.静态冷却材料的使用方法对刺激有反应的材料.热管理 热管理

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Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption
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Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
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Experimental System of Solar Adsorption Refrigeration with Concentrated Collector

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Last Updated: Jun 30, 2025

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科学领域:

  • 材料科学 材料科学 材料科学
  • 可持续能源技术 可持续能源技术
  • 热力学是一种热力学.

背景情况:

  • 辐射冷却 (RC) 是一种碳中和技术,用于将热量分散到外太空.
  • 对RC日益增长的兴趣源于其潜在的经济和环境效益.
  • 减少对传统冷却系统的依赖对于可持续性至关重要.

研究的目的:

  • 审查辐射冷却中的材料发展.
  • 专注于设计策略,内在性质,结构构成和性能提升.
  • 为先进的RC材料提供路线图.

主要方法:

  • 静态同质,静态复合,动态和多功能RC材料的系统概述.
  • 对内在性质和结构构成的设计策略的分析.
  • 对性能改进技术的评估.

主要成果:

  • 详细检查各种类型的辐射冷却材料.
  • 阐明材料设计如何影响冷却性能.
  • 确定RC材料科学的关键进展.

结论:

  • 材料创新对于释放辐射冷却的全部潜力至关重要.
  • 讨论了先进的RC材料的未来趋势,挑战和解决方案.
  • 该审查作为未来RC材料研究和开发的指南.