heat conduction

简明释义

热传导

英英释义

例句

1.In thermal physics, understanding heat conduction 热传导 is crucial for solving many problems.

在热物理学中，理解 热传导 heat conduction 对于解决许多问题至关重要。

2.When you touch a hot surface, heat conduction 热传导 transfers the heat to your skin.

当你触摸热表面时，热传导 heat conduction 将热量传递给你的皮肤。

3.In metals, heat conduction 热传导 occurs much faster than in non-metals.

在金属中，热传导 heat conduction 的速度比非金属快得多。

4.The efficiency of a cooking pot depends on its heat conduction 热传导 properties.

锅具的效率取决于其 热传导 heat conduction 性能。

5.Insulation materials are designed to minimize heat conduction 热传导.

绝缘材料的设计旨在最小化 热传导 heat conduction。

作文

Heat is a form of energy that can be transferred from one object to another. One of the primary ways this transfer occurs is through a process known as heat conduction. Heat conduction refers to the movement of thermal energy within a material or between materials that are in direct contact with each other. This process is governed by the temperature gradient, meaning that heat flows from areas of higher temperature to areas of lower temperature until thermal equilibrium is reached.To understand heat conduction, it is essential to consider how atoms and molecules behave at different temperatures. When a substance is heated, its particles gain kinetic energy and begin to vibrate more vigorously. As these particles collide with neighboring particles, they transfer some of their energy, resulting in the flow of heat through the material. This is particularly evident in solids, where particles are closely packed together, allowing for efficient energy transfer.For example, when you touch a metal spoon that has been sitting in a hot pot of soup, you can feel the heat being conducted from the spoon to your hand. This is because the metal conducts heat very effectively due to its tightly packed atomic structure. In contrast, materials like wood or plastic are poor conductors of heat, which is why they are often used as handles for cooking utensils. The low rate of heat conduction in these materials prevents heat from transferring quickly, protecting your hands from burns.The rate of heat conduction depends on several factors, including the material's thermal conductivity, its thickness, and the temperature difference across it. Thermal conductivity is a property that indicates how well a material can conduct heat. Metals typically have high thermal conductivity, while insulators such as rubber or glass wool have low thermal conductivity. Understanding these properties is crucial in various applications, from building construction to cooking.In engineering, controlling heat conduction is vital for designing effective thermal insulation systems. For instance, in buildings, proper insulation reduces energy costs by minimizing heat loss in winter and heat gain in summer. Insulation materials are chosen based on their ability to resist heat conduction, ensuring a comfortable indoor environment while conserving energy.Moreover, heat conduction plays a significant role in everyday life. For instance, when cooking, understanding how different materials conduct heat can help in choosing the right cookware. A heavy cast iron skillet retains heat well and distributes it evenly, making it ideal for frying, while a stainless steel pan may heat up quickly but does not retain heat as effectively.In conclusion, heat conduction is a fundamental concept in physics and engineering that describes the transfer of thermal energy between materials. It is influenced by the nature of the materials involved and their temperature differences. By understanding heat conduction, we can make informed decisions in various fields, from cooking to construction, ultimately enhancing our daily lives and improving energy efficiency. As we continue to explore the principles of heat conduction, we can develop better technologies and practices that harness this essential process for our benefit.

热量是一种能量形式，可以从一个物体转移到另一个物体。这种转移的主要方式之一是通过一个称为热传导的过程。热传导是指热能在材料内部或在直接接触的材料之间的运动。这个过程受温度梯度的支配，这意味着热量从高温区流向低温区，直到达到热平衡。要理解热传导，首先需要考虑不同温度下原子和分子的行为。当一种物质被加热时，其粒子获得动能并开始更剧烈地振动。当这些粒子与邻近粒子碰撞时，它们会转移一些能量，从而导致热量在材料中流动。这在固体中尤为明显，因为固体的粒子紧密排列在一起，允许有效的能量转移。例如，当你触摸一根放在热汤锅里的金属勺子时，你可以感受到热量从勺子传导到你的手。这是因为金属由于其紧密的原子结构而有效地导热。相比之下，像木头或塑料这样的材料是热的差导体，这就是为什么它们通常用作烹饪器具的把手。由于这些材料的热传导速率较低，因此热量不会迅速转移，从而保护你的手免受烧伤。热传导的速率取决于多个因素，包括材料的热导率、厚度以及材料之间的温差。热导率是一个指标，表示材料导热的能力。金属通常具有高热导率，而橡胶或玻璃棉等绝缘体则具有低热导率。了解这些特性对于建筑施工和烹饪等各种应用至关重要。在工程学中，控制热传导对于设计有效的热绝缘系统至关重要。例如，在建筑中，适当的绝缘可以通过减少冬季的热损失和夏季的热增益来降低能源成本。绝缘材料的选择基于它们抵抗热传导的能力，从而确保舒适的室内环境，同时节约能源。此外，热传导在日常生活中也发挥着重要作用。例如，在烹饪时，了解不同材料的导热性能可以帮助选择合适的炊具。重型铸铁煎锅能够很好地保持热量并均匀分布，非常适合煎炸，而不锈钢锅可能加热迅速，但不如铸铁锅保持热量的效果好。总之，热传导是物理学和工程学中的一个基本概念，描述了热能在材料之间的转移。它受参与材料的性质和温度差异的影响。通过理解热传导，我们可以在各个领域做出明智的决策，从烹饪到建筑，最终改善我们的日常生活并提高能源效率。随着我们继续探索热传导的原理，我们可以开发出更好的技术和实践，利用这一基本过程为我们服务。