heat transfer

简明释义

传热

英英释义

例句

1.Solar panels rely on heat transfer 热传递 to convert sunlight into usable energy.

太阳能电池板依赖于热传递 heat transfer 将阳光转化为可用能量。

2.In engineering, understanding heat transfer 热传递 is crucial for designing efficient cooling systems.

在工程学中，理解热传递 heat transfer 对于设计高效的冷却系统至关重要。

3.Engineers use heat transfer 热传递 principles to design more efficient engines.

工程师利用热传递 heat transfer 原理来设计更高效的发动机。

4.The study of heat transfer 热传递 helps improve thermal insulation in buildings.

对热传递 heat transfer 的研究有助于改善建筑物的热绝缘性能。

5.In cooking, the process of heat transfer 热传递 affects how evenly food is cooked.

在烹饪中，热传递 heat transfer 的过程影响食物的均匀烹饪程度。

作文

Heat transfer is a fundamental concept in physics and engineering, referring to the movement of thermal energy from one object or substance to another. This process occurs through three primary mechanisms: conduction, convection, and radiation. Understanding these mechanisms is crucial for various applications, including designing heating and cooling systems, improving energy efficiency, and even in everyday cooking. Conduction is the transfer of heat through direct contact between materials. When two objects at different temperatures come into contact, heat flows from the hotter object to the cooler one until thermal equilibrium is reached. For example, when you place a metal spoon in a hot pot of soup, the heat from the soup transfers to the spoon, making it warm to the touch. This is because metals are good conductors of heat due to their closely packed atoms that allow energy to move quickly through them.On the other hand, convection involves the movement of heat through fluids (liquids and gases) by the motion of the fluid itself. As a fluid is heated, it becomes less dense and rises, while cooler, denser fluid sinks. This creates a circulation pattern that transfers heat throughout the fluid. A common example of convection is boiling water. As the water at the bottom of the pot heats up, it rises to the surface, allowing cooler water to take its place at the bottom, thus creating a continuous flow that distributes heat evenly.Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation. Unlike conduction and convection, radiation does not require a medium to transfer heat, which is why it can occur in a vacuum. The sun warming the Earth is an excellent example of heat transfer by radiation. The sun emits energy that travels through the vacuum of space and warms the Earth's surface upon contact.In practical applications, understanding heat transfer (热传递) is essential for optimizing processes in various fields. For instance, engineers must consider heat transfer (热传递) when designing heat exchangers, which are devices that transfer heat from one fluid to another without mixing them. These are commonly used in power plants, refrigeration systems, and even in car radiators.Moreover, in the realm of building design, architects and engineers apply principles of heat transfer (热传递) to enhance energy efficiency. By selecting appropriate materials and designing structures that minimize unwanted heat loss during winter months and reduce heat gain during summer, they can significantly lower energy consumption and costs. In conclusion, heat transfer (热传递) is a vital concept that permeates many aspects of our lives, from industrial applications to everyday activities. By grasping the principles of conduction, convection, and radiation, we can better understand how to manage thermal energy effectively. Whether it’s keeping our homes comfortable, cooking our meals efficiently, or designing advanced technologies, the principles of heat transfer (热传递) play a crucial role in shaping our world.

热传递是物理和工程学中的一个基本概念，指的是热能从一个物体或物质转移到另一个物体或物质的过程。这个过程通过三种主要机制发生：导热、对流和辐射。理解这些机制对于各种应用至关重要，包括设计供暖和制冷系统、提高能源效率，甚至在日常烹饪中。导热是通过材料之间的直接接触进行热量转移。当两个不同温度的物体接触时，热量从较热的物体流向较冷的物体，直到达到热平衡。例如，当你将金属勺子放入一锅热汤中时，汤中的热量会转移到勺子上，使其变得温暖。这是因为金属是良好的导热体，其紧密排列的原子使得能量能够迅速通过它们移动。另一方面，对流涉及通过流体（液体和气体）的运动来传递热量。当流体被加热时，它的密度降低并上升，而较冷、较密的流体则下沉。这就形成了一个循环模式，可以将热量在整个流体中传递。煮水就是对流的一个常见例子。当锅底的水加热时，它会上升到表面，而较冷的水则在底部取而代之，从而形成一个持续的流动，将热量均匀分配。辐射是以电磁波的形式（如红外辐射）传递热量。与导热和对流不同，辐射不需要介质来传递热量，这就是为什么它可以在真空中发生的原因。太阳温暖地球就是热传递辐射的一个绝佳例子。太阳发出的能量穿过太空的真空，并在接触地球表面时使其变暖。在实际应用中，理解热传递（heat transfer）对于优化各个领域的过程至关重要。例如，工程师在设计热交换器时必须考虑热传递（heat transfer），这是一种将热量从一种流体转移到另一种流体而不混合它们的设备。这些设备通常用于发电厂、制冷系统，甚至汽车散热器中。此外，在建筑设计领域，建筑师和工程师应用热传递（heat transfer）的原理来提高能源效率。通过选择适当的材料和设计结构，以最小化冬季的热损失和减少夏季的热增益，他们可以显著降低能源消耗和成本。总之，热传递（heat transfer）是一个渗透我们生活各个方面的重要概念，从工业应用到日常活动。通过掌握导热、对流和辐射的原理，我们可以更好地理解如何有效管理热能。无论是保持我们的家居舒适、高效烹饪我们的食物，还是设计先进技术，热传递（heat transfer）的原理在塑造我们的世界中都发挥着至关重要的作用。