heat conduction

简明释义

热传导传热性

英英释义

例句

1.In cooking, heat conduction 热传导 allows the pan to transfer heat to the food.

在烹饪中，热传导使锅能够将热量传递给食物。

2.The metal rod conducts heat very well due to heat conduction 热传导.

由于热传导，金属棒很好的导热。

3.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。

4.When you touch a hot surface, heat conduction 热传导 is what causes the heat to transfer to your skin.

当你触摸一个热表面时，热传导是导致热量传递到你皮肤的原因。

5.The concept of heat conduction 热传导 is essential in thermodynamics.

在热力学中，热传导的概念至关重要。

作文

Heat transfer is a fundamental concept in physics and engineering, and one of the most important mechanisms of heat transfer is heat conduction. Heat conduction (热传导) refers to the process by which thermal energy is transferred from one part of a material to another, or between materials in direct contact, without any movement of the material itself. This phenomenon occurs at the microscopic level, where faster-moving particles collide with slower-moving ones, transferring energy in the process.To better understand heat conduction, we can consider an everyday example: a metal spoon placed in a hot cup of coffee. Initially, the spoon is cool, but as it sits in the hot liquid, the heat from the coffee begins to transfer to the spoon. The molecules in the hot coffee move rapidly due to their high kinetic energy, and when they collide with the cooler molecules of the spoon, they impart some of their energy. As a result, the temperature of the spoon rises, demonstrating the principle of heat conduction.The rate of heat conduction depends on several factors, including the material's thermal conductivity, the temperature difference between the two areas, and the surface area in contact. Materials with high thermal conductivity, such as metals, allow heat to flow through them quickly, while insulating materials like wood or rubber have low thermal conductivity and resist heat flow. This is why we use wooden or plastic handles on cooking utensils; they prevent heat from conducting to our hands.In engineering applications, understanding heat conduction is crucial for designing systems that manage heat effectively. For instance, in the construction of buildings, architects must consider heat conduction when selecting materials for walls, roofs, and windows. Insulation materials are often used to reduce heat conduction, keeping buildings warm in winter and cool in summer.Moreover, heat conduction plays a significant role in electronics. As electronic devices generate heat during operation, effective heat dissipation is essential to prevent overheating and damage. Engineers often incorporate heat sinks made of materials with high thermal conductivity to enhance heat conduction away from sensitive components, ensuring the longevity and reliability of the devices.Another interesting aspect of heat conduction is its relation to the laws of thermodynamics. According to the second law of thermodynamics, heat naturally flows from hotter to cooler regions until thermal equilibrium is reached. This means that if two objects at different temperatures are in contact, heat conduction will cause the hot object to lose heat while the cooler one gains heat.In summary, heat conduction (热传导) is a vital process that affects many aspects of our daily lives and technological advancements. From cooking to building design and electronics, understanding how heat conduction works allows us to make informed choices that improve efficiency and safety. As we continue to explore new materials and technologies, the principles of heat conduction will remain essential in shaping our future innovations.