heat conduction

简明释义

热传导

英英释义

例句

1.Metals are excellent conductors due to their high rate of heat conduction.

金属是优秀的导体，因为它们具有高的热传导率。

2.The concept of heat conduction is critical in understanding thermodynamics.

热传导的概念在理解热力学中至关重要。

3.The efficiency of a cooking pot is largely determined by its ability for heat conduction.

一个炊具的效率在很大程度上取决于其热传导能力。

4.In winter, wearing layers helps reduce heat conduction away from your body.

在冬天，穿多层衣物有助于减少身体周围的热传导。

5.Insulating materials are used to minimize heat conduction in buildings.

绝缘材料用于最小化建筑物内的热传导。

作文

Heat is a fundamental aspect of our daily lives, influencing everything from the weather we experience to the comfort of our homes. One of the key processes that govern how heat moves through materials is known as heat conduction. This phenomenon occurs when heat energy is transferred from one part of a material to another, or from one material to another, through direct contact. Understanding heat conduction is essential in various fields, including engineering, physics, and environmental science.To grasp the concept of heat conduction, we first need to look at the microscopic level of matter. All substances are made up of atoms and molecules that are constantly in motion. When one part of a material is heated, its particles gain energy and vibrate more vigorously. These energized particles collide with neighboring particles, passing on their energy. This transfer of energy continues throughout the material until thermal equilibrium is reached, meaning the temperature becomes uniform across the entire substance. This process is what we refer to as heat conduction.A practical example of heat conduction can be observed when cooking. For instance, when you place a metal spoon in a hot pot of soup, the end of the spoon submerged in the soup heats up due to heat conduction. The heat from the soup transfers to the spoon, causing the metal to become warm. This is because metals are generally good conductors of heat, allowing energy to move quickly through them. In contrast, materials like wood or plastic are poor conductors and do not transfer heat as efficiently, which is why wooden spoons remain cool even when used in hot dishes.The rate at which heat conduction occurs depends on several factors, including the material's thermal conductivity, the temperature difference between the two areas, and the distance over which the heat must travel. Thermal conductivity is a property that indicates how well a material conducts heat. For example, copper has a high thermal conductivity, making it an excellent choice for electrical wiring and cookware. On the other hand, materials like rubber and glass have low thermal conductivity, which makes them ideal insulators.In addition to its applications in cooking and materials science, heat conduction plays a significant role in many natural phenomena. For instance, it is a critical factor in understanding climate change. As the Earth's surface absorbs solar radiation, heat conduction helps distribute this heat throughout the atmosphere and oceans. This distribution affects weather patterns, ocean currents, and ultimately, the global climate.Moreover, engineers often consider heat conduction when designing buildings and other structures. Insulation materials are chosen based on their ability to resist heat conduction, helping to keep buildings warm in winter and cool in summer. This not only enhances comfort but also improves energy efficiency, reducing the need for heating and cooling systems.In conclusion, heat conduction is a vital process that impacts various aspects of our lives, from the simple act of cooking to complex environmental systems. By understanding how heat conduction works, we can make informed decisions in our daily activities and contribute to more sustainable practices in engineering and environmental management. Whether we are aware of it or not, heat conduction is always at play, shaping our experiences and the world around us.

热量是我们日常生活中的一个基本方面，影响着从我们所经历的天气到我们家居的舒适度等各个方面。控制热量如何在材料中移动的关键过程之一被称为热传导。这个现象发生在当热能从材料的一部分转移到另一部分，或从一种材料转移到另一种材料时，通过直接接触。理解热传导在工程、物理和环境科学等多个领域都是至关重要的。要理解热传导的概念，我们首先需要从物质的微观水平来看。所有物质都是由不断运动的原子和分子组成的。当材料的一部分被加热时，其颗粒获得能量并更加剧烈地振动。这些能量增强的颗粒与相邻颗粒碰撞，传递它们的能量。这种能量的转移会持续整个材料，直到达到热平衡，即温度在整个物质中变得均匀。这个过程就是我们所称的热传导。热传导的一个实际例子可以在烹饪中观察到。例如，当你将金属勺子放入一锅热汤中时，浸入汤中的勺子末端因热传导而变热。汤中的热量转移到勺子上，使金属变暖。这是因为金属通常是良好的热导体，允许能量迅速通过它们移动。相比之下，像木头或塑料这样的材料是差导体，不能有效地传递热量，这就是为什么木勺在用于热菜肴时仍然保持凉爽。热传导发生的速度取决于多个因素，包括材料的热导率、两个区域之间的温差以及热量必须传播的距离。热导率是指示材料导热性能的属性。例如，铜具有高热导率，使其成为电线和炊具的优良选择。另一方面，橡胶和玻璃等材料具有低热导率，这使它们成为理想的绝缘体。除了在烹饪和材料科学中的应用外，热传导在许多自然现象中也发挥着重要作用。例如，它是理解气候变化的关键因素。当地球表面吸收太阳辐射时，热传导帮助将这些热量分布到大气和海洋中。这种分布影响天气模式、洋流，并最终影响全球气候。此外，工程师在设计建筑物和其他结构时通常会考虑热传导。绝缘材料的选择基于它们抵抗热传导的能力，有助于在冬季保持建筑物温暖，在夏季保持凉爽。这不仅提高了舒适度，还改善了能源效率，减少了对供暖和制冷系统的需求。总之，热传导是一个重要的过程，影响着我们生活的各个方面，从简单的烹饪行为到复杂的环境系统。通过理解热传导的工作原理，我们可以在日常活动中做出明智的决定，并为工程和环境管理中的可持续实践做出贡献。无论我们是否意识到，热传导始终在起作用，塑造着我们的体验和周围的世界。