selective radiator

简明释义

选择辐射体

英英释义

例句

1.In modern heating systems, a selective radiator can significantly improve energy efficiency.

在现代供暖系统中，选择性辐射器可以显著提高能源效率。

2.The design of the building incorporates a selective radiator, which optimizes heat distribution based on the specific needs of each room.

这栋建筑的设计采用了选择性辐射器，根据每个房间的具体需求优化热量分布。

3.The selective radiator technology is becoming increasingly popular in eco-friendly buildings.

在环保建筑中，选择性辐射器技术变得越来越受欢迎。

4.By using a selective radiator, we can reduce heat loss and maintain a comfortable indoor environment.

通过使用选择性辐射器，我们可以减少热量损失，保持舒适的室内环境。

5.Engineers are developing a new selective radiator that can adapt to varying temperature conditions.

工程师们正在开发一种新的选择性辐射器，能够适应不同的温度条件。

作文

In the field of thermodynamics and heat transfer, the concept of a selective radiator plays a crucial role in understanding how materials emit thermal radiation. A selective radiator is defined as a surface that emits thermal radiation more efficiently at certain wavelengths compared to others. This property is particularly important in applications such as thermal insulation, energy conservation, and even in the design of spacecraft. By utilizing materials that act as selective radiators, engineers can improve the efficiency of systems that rely on thermal management.To comprehend the significance of selective radiators, we must first explore the principles of blackbody radiation. A perfect blackbody is an idealized physical object that absorbs all incoming radiation and re-emits it entirely. However, real materials do not behave like perfect blackbodies; they have specific emissivity values that determine their ability to emit thermal radiation at various wavelengths. A selective radiator has a high emissivity at certain wavelengths while having low emissivity at others, which makes it particularly effective for specific applications.For instance, in solar energy applications, selective radiators are used in solar collectors to maximize the absorption of solar radiation while minimizing thermal losses. By selecting materials that are highly emissive in the infrared range but less so in the visible range, these collectors can trap heat more effectively, leading to greater energy efficiency. This principle is also applied in building materials, where selective radiators help in maintaining comfortable indoor temperatures by controlling heat loss through walls and roofs.Moreover, the concept of selective radiators extends to the field of astronomy. In space exploration, spacecraft are often equipped with thermal control systems that use selective radiators to manage the heat absorbed from the sun and emitted into space. These systems ensure that sensitive instruments onboard do not overheat while also preventing excessive heat loss, which could lead to operational failures. The design of these thermal control systems relies heavily on understanding the emissive properties of materials and how they interact with different wavelengths of radiation.In conclusion, the importance of selective radiators cannot be overstated. They are integral to various technologies that require efficient thermal management. From improving the performance of solar collectors to ensuring the reliability of spacecraft, the application of selective radiators demonstrates the intersection of material science and engineering principles. As research continues to advance in this field, we can expect to see even more innovative uses of selective radiators that will contribute to energy efficiency and sustainability in our everyday lives.

在热力学和热传递领域，选择性辐射体的概念在理解材料如何发出热辐射方面发挥着至关重要的作用。选择性辐射体被定义为在某些波长下比其他波长更有效地发出热辐射的表面。这个特性在热绝缘、节能甚至航天器设计等应用中尤为重要。通过利用作为选择性辐射体的材料，工程师可以提高依赖热管理系统的效率。要理解选择性辐射体的重要性，我们必须首先探讨黑体辐射的原理。完美的黑体是一个理想化的物理对象，它吸收所有入射辐射并完全重新发射。然而，真实材料并不表现得像完美的黑体；它们具有特定的发射率值，决定了它们在不同波长下发出热辐射的能力。选择性辐射体在某些波长下具有高发射率，而在其他波长下则具有低发射率，这使得它在特定应用中尤其有效。例如，在太阳能应用中，选择性辐射体被用于太阳能集热器，以最大限度地吸收太阳辐射，同时最小化热损失。通过选择在红外范围内高度发射而在可见范围内发射较少的材料，这些集热器能够更有效地捕获热量，从而提高能源效率。这个原理也应用于建筑材料，其中选择性辐射体通过控制墙壁和屋顶的热损失来帮助保持舒适的室内温度。此外，选择性辐射体的概念扩展到天文学领域。在太空探索中，航天器通常配备有热控制系统，使用选择性辐射体来管理从太阳吸收和向太空发出的热量。这些系统确保敏感仪器不会过热，同时防止过多的热量损失，这可能导致操作故障。这些热控制系统的设计在很大程度上依赖于对材料发射特性的理解，以及它们如何与不同波长的辐射相互作用。总之，选择性辐射体的重要性不容小觑。它们是各种需要高效热管理的技术的核心。从提高太阳能集热器的性能到确保航天器的可靠性，选择性辐射体的应用展示了材料科学与工程原理的交汇。随着这一领域研究的不断进展，我们可以期待看到更多创新的选择性辐射体应用，为我们日常生活中的能源效率和可持续性做出贡献。