heat transfer

简明释义

热传递

英英释义

例句

1.Engineers study heat transfer (热量传递) to improve the cooling systems in cars.

工程师研究热量传递以改善汽车的冷却系统。

2.Insulation materials are designed to reduce heat transfer (热量传递) between the inside and outside of a building.

绝缘材料旨在减少建筑物内部和外部之间的热量传递。

3.The concept of heat transfer (热量传递) is crucial in thermodynamics.

在热力学中，热量传递的概念至关重要。

4.In cooking, understanding heat transfer (热量传递) helps you achieve the perfect steak.

在烹饪中，理解热量传递有助于你做出完美的牛排。

5.The efficiency of the engine depends heavily on the rate of heat transfer (热量传递) from the combustion chamber to the engine components.

发动机的效率在很大程度上取决于燃烧室到发动机部件的热量传递。

作文

Heat transfer is a fundamental concept in physics and engineering that describes the movement of thermal energy from one object or material to another. This process occurs in three primary modes: conduction, convection, and radiation. Understanding these modes is crucial for various applications, including designing heating systems, improving energy efficiency, and even in everyday cooking. In this essay, we will explore the significance of heat transfer (热传递) and its applications in our daily lives.Conduction is the first mode of heat transfer (热传递). It occurs when two objects at different temperatures come into direct contact with each other. The thermal energy moves from the hotter object to the cooler one until they reach thermal equilibrium. A common example of conduction can be observed when a metal spoon is placed in a hot cup of coffee. The heat from the coffee transfers to the spoon, making it warm to the touch. This principle is essential in many industries, such as in the manufacturing of heat exchangers, where efficient heat transfer (热传递) between fluids is necessary.Convection, on the other hand, involves the movement of fluids (liquids or gases) and is driven by differences in temperature and density within the fluid. When a fluid is heated, it becomes less dense and rises, while the cooler, denser fluid sinks. This creates a circulation pattern that facilitates heat transfer (热传递). An everyday example of convection is boiling water. As the water at the bottom of the pot heats up, it rises to the surface, allowing the cooler water to move down and get heated in turn. Understanding convection is vital for engineers who design heating and cooling systems, as they must ensure effective heat transfer (热传递) throughout the system.The third mode of heat transfer (热传递) is radiation, which does not require a medium to occur. Thermal radiation is the emission of energy in the form of electromagnetic waves, primarily infrared radiation. All objects emit radiation based on their temperature; hotter objects emit more radiation. A practical example of radiation is the warmth felt from the sun on a sunny day. Despite the distance between the Earth and the sun, we can still feel the heat due to the radiation emitted by the sun. This principle is harnessed in solar panels, which convert sunlight into usable energy, showcasing the importance of heat transfer (热传递) in renewable energy technologies.In addition to these mechanisms, the study of heat transfer (热传递) is essential in various scientific fields, including meteorology, climatology, and even medicine. For instance, understanding how heat transfer (热传递) affects weather patterns can help meteorologists predict storms and climate changes. In medicine, knowledge of heat transfer (热传递) is used in hyperthermia treatment for cancer, where controlled heating is applied to kill cancer cells.In conclusion, heat transfer (热传递) is a vital concept that permeates many aspects of our lives, from cooking to industrial processes and environmental science. By grasping the principles of conduction, convection, and radiation, we can better appreciate how energy moves around us and apply this knowledge to improve technology and our everyday experiences. As we continue to innovate and seek sustainable solutions, the principles of heat transfer (热传递) will remain at the forefront of scientific research and practical applications.