effective thermal conductivity

简明释义

有效热传导率

英英释义

例句

1.In building design, understanding the effective thermal conductivity 有效热导率 of materials is crucial for energy efficiency.

在建筑设计中，了解材料的有效热导率 有效热导率 对于能效至关重要。

2.The researchers found that the effective thermal conductivity 有效热导率 of the composite material was significantly lower than that of the individual components.

研究人员发现，该复合材料的有效热导率 有效热导率 显著低于各个组分的有效热导率。

3.To improve the thermal performance of the system, engineers focused on reducing the effective thermal conductivity 有效热导率 of the interface.

为了改善系统的热性能，工程师们专注于降低界面的有效热导率 有效热导率。

4.The effective thermal conductivity 有效热导率 of soil can vary widely based on moisture content and temperature.

土壤的有效热导率 有效热导率 会因含水量和温度而有很大变化。

5.The insulation material was tested to determine its effective thermal conductivity 有效热导率 in various temperature ranges.

该绝缘材料经过测试，以确定其在不同温度范围内的有效热导率 有效热导率。

作文

The concept of effective thermal conductivity is crucial in the fields of engineering and materials science. It refers to the ability of a material to conduct heat, taking into account not only its intrinsic properties but also the effects of its structure and the surrounding environment. Understanding effective thermal conductivity is essential for designing thermal insulation systems, optimizing energy efficiency, and improving the performance of various applications such as building materials, electronics, and even aerospace components.To comprehend effective thermal conductivity, one must first understand the basic principles of thermal conductivity. Thermal conductivity is a measure of a material's ability to transfer heat through conduction. This property is influenced by factors such as temperature, material composition, and physical structure. However, in real-world applications, materials are rarely homogeneous. They may contain voids, interfaces, or layers that can significantly affect how heat flows through them. This is where the concept of effective thermal conductivity becomes important.For instance, consider a wall made of bricks and insulation. The bricks have a certain thermal conductivity, while the insulation has a different value. When these materials are combined, the overall heat transfer through the wall is not simply the average of their thermal conductivities. Instead, the effective thermal conductivity of the wall must be calculated to account for the interactions between the two materials. This calculation helps engineers determine how much heat will be lost through the wall, which is vital for maintaining energy efficiency in buildings.Moreover, the effective thermal conductivity can vary depending on the direction of heat flow, especially in anisotropic materials, which have different properties in different directions. For example, in composite materials, the arrangement of the fibers can lead to different thermal conductivities in different orientations. Therefore, engineers must carefully analyze the geometry and orientation of materials to accurately assess their effective thermal conductivity.In addition to practical applications, understanding effective thermal conductivity is also important for scientific research. It allows researchers to develop new materials with tailored thermal properties for specific applications. For instance, in the field of electronics, where overheating can lead to failure, materials with low effective thermal conductivity are often sought to ensure efficient heat dissipation. Conversely, in thermal insulators, materials with high effective thermal conductivity are desired to minimize heat loss.Furthermore, the measurement of effective thermal conductivity can be complex. Various methods exist, including steady-state and transient techniques, each with its advantages and limitations. Accurate measurements are essential for ensuring that materials perform as expected in their intended applications. As technology advances, new methods for measuring and predicting effective thermal conductivity continue to emerge, enhancing our understanding of heat transfer in materials.In conclusion, the concept of effective thermal conductivity plays a vital role in both theoretical and practical aspects of heat transfer. By considering the interactions between materials and their structures, engineers and scientists can design better systems and materials for a wide range of applications. A thorough understanding of effective thermal conductivity not only contributes to energy efficiency but also drives innovation in material development, paving the way for advancements in technology and sustainability.

有效热导率的概念在工程和材料科学领域至关重要。它指的是材料传导热量的能力，考虑的不仅是其内在特性，还包括其结构和周围环境的影响。理解有效热导率对于设计热绝缘系统、优化能效以及改善建筑材料、电子产品甚至航空航天组件等各种应用的性能至关重要。要理解有效热导率，首先必须了解热导率的基本原理。热导率是衡量材料通过导热传递热量的能力。这一特性受温度、材料成分和物理结构等因素的影响。然而，在实际应用中，材料很少是均匀的。它们可能包含空隙、界面或层，这些都可以显著影响热量的流动。这就是有效热导率概念变得重要的地方。例如，考虑由砖块和绝缘材料组成的墙壁。砖块具有一定的热导率，而绝缘材料则有不同的值。当这些材料结合在一起时，墙壁的整体热传递并不是它们热导率的简单平均值。相反，墙壁的有效热导率必须计算，以考虑两种材料之间的相互作用。这一计算帮助工程师确定通过墙壁会损失多少热量，这对于维持建筑的能效至关重要。此外，有效热导率可能会因热流方向的不同而变化，尤其是在各向异性材料中，其在不同方向上的特性不同。例如，在复合材料中，纤维的排列可能导致在不同方向上有不同的热导率。因此，工程师必须仔细分析材料的几何形状和方向，以准确评估其有效热导率。除了实际应用之外，理解有效热导率对科学研究也很重要。它使研究人员能够开发出具有特定应用所需热特性的材料。例如，在电子领域，过热可能导致故障，因此通常需要低有效热导率的材料以确保高效散热。相反，在热绝缘体中，通常希望材料具有高有效热导率以最小化热损失。此外，有效热导率的测量可能很复杂。存在多种方法，包括稳态和瞬态技术，每种方法都有其优缺点。准确的测量对于确保材料在预期应用中表现如预期至关重要。随着技术的进步，新的测量和预测有效热导率的方法不断出现，增强了我们对材料中热传递的理解。总之，有效热导率的概念在热传递的理论和实践方面都发挥着重要作用。通过考虑材料及其结构之间的相互作用，工程师和科学家可以设计出更好的系统和材料，适用于广泛的应用。全面理解有效热导率不仅有助于提高能效，还推动了材料开发的创新，为技术和可持续性的发展铺平了道路。