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Masonry Curtain Walls01:20

Masonry Curtain Walls

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Masonry curtain walls employ brick or stone veneers supported by the building's structure to form an external cladding system that is both aesthetically appealing and functional. These walls are erected through two principal techniques, first by traditional layering of masonry units and second by using prefabricated panels. Traditional construction relies on steel shelf angles attached to the spandrel beam for support, with high-bond mortars ensuring secure attachment of masonry veneer...
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Energy Conservation and Bernoulli's Equation01:16

Energy Conservation and Bernoulli's Equation

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Applying the conservation of energy principle or the work-energy theorem to an incompressible, inviscid fluid in laminar, steady, irrotational flow leads to Bernoulli's equation. It states that the sum of the fluid pressure, potential, and kinetic energy per unit volume is constant along a streamline.
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...
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Angular Momentum01:21

Angular Momentum

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Angular momentum characterizes an object's rotational motion and is defined as the moment of its linear momentum about a specified point O. When a particle moves along a curved path in the x-y plane, the scalar formulation calculates the magnitude of its angular momentum, utilizing the moment arm (d), representing the perpendicular distance from point O to the line of action of the linear momentum. Despite being scalar in formulation, angular momentum is inherently a vector quantity. Its...
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Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

390
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
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Electrical Energy01:10

Electrical Energy

1.7K
Using electric appliances for a longer period of time consumes more electrical energy and results in a higher electric bill. The energy produced by the transfer of electrons from one point to another is known as electrical energy. If power is delivered at a constant rate, the electrical energy can be defined as the product of power used by the device for a period of time. The energy unit on electric bills is the kilowatt-hour, where one kilowatt-hour is equivalent to 3.6 × 106 joules.
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Energy00:58

Energy

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The universe is composed of matter in different forms, and all forms of matter contain energy.  The different forms of energy on Earth originate from the Sun—the ultimate energy source. For instance, plants capture light energy from the Sun, and through the process of photosynthesis, convert it into chemical energy. This stored energy from plants can be harnessed in many ways. For example, eating plant products as food provides energy for our body to function, and burning wood or...
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相关实验视频

Updated: Jan 17, 2026

Indoor Experimental Assessment of the Efficiency and Irradiance Spot of the Achromatic Doublet on Glass ADG Fresnel Lens for Concentrating Photovoltaics
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取决于角度的节能智能窗户

Keunhyuk Ryu1,2, Guanya Wang2, Vijay Shankar Sridharan1

  • 1School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore, Singapore.

ACS nano
|September 15, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的智能窗口,使用动态元表面来适应温度和太阳角度. 这一创新显著提高了建筑物的能效和视觉舒适度.

关键词:
双带光学调制的双带光学调制.metasurface 地表的表面是什么被动热调节是一种被动的热调节.阶段变化材料的变相材料.季节性的太阳变化.智能窗口 智能窗口 智能窗口

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科学领域:

  • 材料科学 材料科学 材料科学
  • 光电学是指光电子产品.
  • 可持续的建筑 可持续的建筑

背景情况:

  • 窗户占建筑物热量损失的50%左右.
  • 现有的智能窗户往往忽视太阳顶点角度变化,只关注温度.
  • 动态超表面为先进的光学控制提供了潜力.

研究的目的:

  • 开发一个智能窗口,对温度和太阳顶角具有双重响应.
  • 通过可扩展的制造技术设计角度和热响应.
  • 通过先进的窗户技术,提高建筑物的能源效率和视觉舒适度.

主要方法:

  • 使用动态元表面和相变材料 (二氧化瓦尼 - VO2) 制造智能窗口.
  • 使用可扩展的网状印刷和喷涂来实现工业兼容性.
  • 设计一个Fabry-Perot共振器,用于太阳和热辐射的双调制.

主要成果:

  • 智能窗口展示了对太阳顶点角度和温度的动态响应.
  • 实现了有前途的发光率传输率 (36.8%),太阳能调制 (30.8%),红外发射率调制 (0.4).
  • 在节能模拟和日光照明方面,性能优于商业低排放性玻璃和最先进的设计.

结论:

  • 与传统设计相比,拟议中的智能窗户提供了卓越的节能性能和视觉舒适性.
  • 超表面和相变材料的整合是动态光学调制的可行策略.
  • 这项技术有可能在节能建筑立面及其他领域得到广泛应用.