heat transfer

简明释义

传热

英英释义

例句

1.In cooking, heat transfer occurs when the heat from the stove warms the pan.

在烹饪过程中，当炉子的热量加热锅时，会发生热传递。

2.The heat transfer process between the hot and cold surfaces can be analyzed using Fourier's law.

可以使用傅里叶定律分析热表面之间的热传递过程。

3.In thermodynamics, understanding heat transfer is crucial for designing efficient engines.

在热力学中，理解热传递对于设计高效的发动机至关重要。

4.Engineers must consider heat transfer when designing cooling systems for electronic devices.

工程师在设计电子设备的冷却系统时必须考虑热传递。

5.Insulation materials are designed to minimize heat transfer to keep buildings warm in winter.

绝缘材料旨在最小化热传递，以保持建筑在冬季温暖。

作文

Heat transfer is a fundamental concept in physics and engineering that describes the movement of thermal energy from one object or substance to another. This process occurs in three primary ways: conduction, convection, and radiation. Understanding these mechanisms is crucial for various applications, including climate control, manufacturing, and even cooking. In this essay, I will delve into the principles of heat transfer (热传递) and its significance in our daily lives.Conduction is the first mode of heat transfer (热传递), which occurs when two objects at different temperatures are in direct contact with each other. The heat flows from the hotter object to the cooler one until thermal equilibrium is reached. A common example of conduction can be observed when you touch a metal spoon that has been sitting in a hot pot of soup. The heat from the soup transfers to the spoon, making it hot to the touch. The efficiency of conduction depends on the material's thermal conductivity; metals, for instance, are excellent conductors of heat, while wood and plastic are poor conductors.The second method of heat transfer (热传递) is convection, which involves the movement of fluid (liquid or gas) and the transfer of heat through this movement. When a fluid is heated, it becomes less dense and rises, while the cooler, denser fluid sinks. This creates a convection current, which helps distribute heat throughout the fluid. An everyday example of convection can be seen when boiling water. The water at the bottom of the pot heats up, rises to the surface, cools down, and then sinks again, creating a continuous cycle of heat transfer (热传递). This principle is also applied in heating systems, where warm air rises and circulates throughout a room.The third form of heat transfer (热传递) is radiation, which does not require a medium to transfer heat. Instead, thermal energy is emitted in the form of electromagnetic waves, such as infrared radiation. All objects emit radiation based on their temperature, and this process is how the sun warms the Earth. For instance, when you stand outside on a sunny day, you can feel the warmth of the sun on your skin, even though there is no physical contact between you and the sun. This phenomenon of heat transfer (热传递) is essential for understanding solar energy and its applications in renewable energy technologies.In conclusion, heat transfer (热传递) is a vital concept that governs many processes in our environment and technology. Whether through conduction, convection, or radiation, the movement of thermal energy plays a significant role in our daily lives, from cooking our meals to regulating the temperature in our homes. By understanding the principles of heat transfer (热传递), we can better appreciate the science behind various phenomena and improve our efficiency in numerous applications. As we continue to innovate and develop new technologies, a solid grasp of heat transfer (热传递) will remain essential.

热传递是物理学和工程学中的一个基本概念，描述了热能从一个物体或物质转移到另一个物体或物质的过程。这个过程主要通过三种方式发生：导热、对流和辐射。理解这些机制对于气候控制、制造业甚至烹饪等各种应用至关重要。在这篇文章中，我将深入探讨热传递的原理及其在我们日常生活中的重要性。导热是热传递的第一种方式，当两个不同温度的物体直接接触时，就会发生导热。热量从较热的物体流向较冷的物体，直到达到热平衡。一个常见的导热例子是，当你触摸一根放在热汤中的金属勺子时，汤中的热量转移到勺子上，使其变得烫手。导热的效率取决于材料的热导率；例如，金属是良好的导热体，而木材和塑料则是差的导热体。第二种热传递方式是对流，它涉及流体（液体或气体）的运动以及通过这种运动转移热量。当流体被加热时，它的密度降低并上升，而较冷、密度更大的流体则下沉。这就形成了对流电流，有助于在流体中分布热量。对流的一个日常例子可以在煮水时看到。锅底的水加热后上升到表面，冷却后再下沉，从而形成一个持续的热传递循环。这一原理也应用于供暖系统中，温暖的空气上升并在房间内循环。第三种热传递方式是辐射，它不需要介质来转移热量。相反，热能以电磁波的形式发射，例如红外辐射。所有物体根据其温度发出辐射，这一过程也是太阳温暖地球的方式。例如，当你在阳光明媚的日子里站在户外时，你可以感受到阳光照射在皮肤上的温暖，即使你和太阳之间没有物理接触。这个热传递现象对于理解太阳能及其在可再生能源技术中的应用至关重要。总之，热传递是支配我们环境和技术中许多过程的重要概念。无论是通过导热、对流还是辐射，热能的运动在我们的日常生活中发挥着重要作用，从烹饪食物到调节家中的温度。通过理解热传递的原理，我们可以更好地欣赏各种现象背后的科学，并提高我们在众多应用中的效率。随着我们不断创新和开发新技术，对热传递的深刻理解将始终是必不可少的。