通过双共振进行低温红外隐形材料,以提高没有能源消耗的热管理
Kyum An1, Taehwan Kim2, Namkyu Lee1
1Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 13722, South Korea.
ACS applied materials & interfaces
|January 31, 2025
概括
这项研究引入了一种新型的低温红外 (IR) 伪装材料 (LICM),可以增强热能消散. LICM使用双频共振来提高在寒冷环境中的性能,这对于碳中和至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 热力工程是热力工程中的一个.
- 光学是什么?光学是什么?光学是什么?
背景情况:
- 被动热管理对于碳中和至关重要,减少能源消耗.
- 红外 (IR) 伪装材料可以通过辐射散发热量,但在低温环境中难以工作.
- 优化用于单频段 (5-8μm) 的传统红外材料在较低的温度下是低效的.
研究的目的:
- 开发一种新型的低温红外伪装材料 (LICM),以提高辐射能耗.
- 为了克服在寒冷环境和小规模应用中常规红外伪装的局限性.
- 为了在各种应用中实现有效的IR伪装和节能.
主要方法:
- 设计了一种新型LICM,利用5-8微米和14-20微米大气非检测波段的双波段共振.
- 在不同温度 (250 K和350 K) 上对能量消耗的实验评估.
- 使用LWIR摄像头 (7.5-14微米) 评估红外 signature 减小和热像性能.
主要成果:
- 与传统材料相比,LICM显示了能量消耗的显著增加:在250K时增加273%,在350K时增加167%.
- 保持了大约10%的红外 signature 减小黑体辐射.
- 在温度测量中显示出优异的红外隐形性能.
结论:
- 双带共振设计有效地将红外隐形扩展到低温环境.
- 该LICM提供了大量的节能,使其适用于能源转换,航空航天和可持续的热管理.
- 这种材料代表了被动热管理技术的关键进步.
相关概念视频
Radiation: Applications
1.1K
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...
The average...
1.1K
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
Conduction, Convection and Radiation: Problem Solving
1.1K
There are three methods by which heat transfer can take place: conduction, convection, and radiation. Each method has unique and interesting characteristics, but all three have two things in common: they transfer heat solely because of a temperature difference; and the greater the temperature difference, the faster the heat transfer.
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
1.1K
Absorption of Radiation
699
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
699
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
281
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
The ATR process begins by directing a beam...
281
Decreased Body Temperature
602
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
602


