heat transfer

简明释义

传热

英英释义

例句

1.The engineer explained how heat transfer 热传递 occurs in different materials.

工程师解释了不同材料中是如何发生热传递的。

2.The design of the heat exchanger relies heavily on efficient heat transfer 热传递 mechanisms.

热交换器的设计在很大程度上依赖于高效的热传递机制。

3.In our physics class, we studied the principles of heat transfer 热传递 through conduction, convection, and radiation.

在我们的物理课上，我们研究了通过导热、对流和辐射的热传递原理。

4.In cooking, understanding heat transfer 热传递 can help achieve the desired doneness of food.

在烹饪中，理解热传递可以帮助实现食物所需的熟度。

5.Proper insulation can minimize heat transfer 热传递 in buildings, improving energy efficiency.

适当的绝缘可以最小化建筑物中的热传递，提高能效。

作文

Heat transfer is a fundamental concept in the field of thermodynamics, which deals with the movement of thermal energy from one physical system to another. Understanding heat transfer (热传递) is essential for various applications in engineering, environmental science, and everyday life. There are three primary modes of heat transfer (热传递): conduction, convection, and radiation. Each mode has its unique characteristics and mechanisms that describe how heat moves between objects or through materials.Conduction is the process by which heat is transferred through a solid material. When two objects at different temperatures come into contact, heat flows from the hotter object to the cooler one until thermal equilibrium is reached. This transfer occurs at the molecular level, where faster-moving molecules collide with slower ones, transferring kinetic energy. For example, when you hold one end of a metal rod in a flame, the heat travels along the rod, making the other end hot. The efficiency of heat transfer (热传递) through conduction depends on the material's thermal conductivity; metals typically conduct heat better than insulators like wood or plastic.Convection, on the other hand, involves the movement of fluids (liquids or gases) and the transfer of heat within those fluids. When a fluid is heated, it becomes less dense and rises, while cooler, denser fluid sinks. This creates a circulation pattern that effectively transfers heat throughout the fluid. An everyday example of convection is boiling water in a pot; as the water at the bottom heats up, it rises to the top, while cooler water descends to take its place. Understanding heat transfer (热传递) through convection is crucial in designing heating and cooling systems, such as radiators and air conditioners.Radiation is the transfer of heat in the form of electromagnetic waves, which can occur even in a vacuum. All objects emit thermal radiation depending on their temperature; hotter objects emit more radiation than cooler ones. The sun is a prime example of heat transfer through radiation, as it warms the Earth despite the vast distance between them. In our daily lives, we often experience heat transfer (热传递) through radiation when standing near a campfire or feeling the warmth of sunlight on our skin. Understanding this mode of heat transfer (热传递) is vital for energy efficiency in buildings and the design of solar panels.In conclusion, mastering the concept of heat transfer (热传递) is essential for anyone working in fields related to energy, engineering, or environmental science. By understanding the different modes of heat transfer (热传递)—conduction, convection, and radiation—individuals can make informed decisions about energy use and efficiency. Whether designing a new heating system, improving insulation in a home, or harnessing solar energy, knowledge of heat transfer (热传递) is a critical component of effective problem-solving and innovation.