heat transfer

简明释义

传热

英英释义

例句

1.In this experiment, we will measure the rate of heat transfer 热传递 between two different materials.

在这个实验中，我们将测量两种不同材料之间的热传递速率。

2.The concept of heat transfer 热传递 is fundamental in thermodynamics.

在热力学中，热传递的概念是基本的。

3.Insulation is important because it reduces heat transfer 热传递 and saves energy.

绝缘材料很重要，因为它减少了热传递并节省能量。

4.We used a thermal camera to visualize heat transfer 热传递 in the building.

我们使用热成像相机来可视化建筑中的热传递。

5.The engineer explained how heat transfer 热传递 occurs in the new heating system.

工程师解释了新加热系统中是如何发生热传递的。

作文

Heat transfer is a fundamental concept in the field of thermodynamics that describes the movement of thermal energy from one physical system to another. This process occurs through three primary mechanisms: conduction, convection, and radiation. Understanding heat transfer (热传递) is essential for various applications, ranging from engineering to environmental science.Conduction is the transfer of heat through direct contact between materials. When two objects at different temperatures come into contact, thermal energy flows from the hotter object to the cooler one until thermal equilibrium is reached. For instance, when a metal spoon is placed in a hot cup of coffee, the spoon heats up due to heat transfer (热传递) occurring at the molecular level. The faster-moving molecules of the hot coffee collide with the slower-moving molecules of the cooler spoon, resulting in an increase in the spoon's temperature.Convection, on the other hand, involves the movement of fluids (liquids and gases) and the heat transfer that occurs within those fluids. As a fluid is heated, it becomes less dense and rises, while cooler, denser fluid sinks. This creates a convection current that facilitates heat transfer (热传递) throughout the fluid. A common example of convection can be observed when heating water in a pot; the water at the bottom heats up first and rises to the top, while cooler water descends to take its place, creating a continuous cycle of heat transfer (热传递).Radiation is the transfer of heat through electromagnetic waves, which can occur even in a vacuum. Unlike conduction and convection, radiation does not require a medium to transfer heat. The sun is a prime example of radiant heat transfer (热传递), as it emits energy that travels through the vacuum of space to warm the Earth. Objects that absorb this radiant energy will experience an increase in temperature, demonstrating how heat transfer (热传递) can occur over vast distances.In practical applications, understanding heat transfer (热传递) is crucial for designing efficient heating and cooling systems. Engineers must consider all three modes of heat transfer (热传递) when developing technologies such as air conditioners, refrigerators, and heat exchangers. For example, in a heat exchanger, engineers design the system to maximize heat transfer (热传递) efficiency by increasing the surface area for conduction and optimizing fluid flow for convection.Moreover, heat transfer (热传递) principles are also applied in building construction. Insulation materials are used to reduce unwanted heat transfer (热传递) between the interior and exterior of buildings, thereby improving energy efficiency. By minimizing heat transfer (热传递), buildings can maintain comfortable temperatures while reducing energy consumption.In conclusion, heat transfer (热传递) is a vital concept in both natural and engineered systems. Its understanding allows us to harness energy more efficiently and effectively manage thermal processes in our daily lives. Whether we are cooking, heating our homes, or designing advanced technological systems, the principles of heat transfer (热传递) play a significant role in shaping our interactions with the environment.