joule heat

简明释义

焦耳热

英英释义

例句

1.Engineers must account for joule heat 焦耳热 when designing circuits to prevent overheating.

工程师在设计电路时必须考虑joule heat 焦耳热以防止过热。

2.The joule heat 焦耳热 generated in the wires can lead to energy loss in electrical systems.

导线中产生的joule heat 焦耳热可能导致电力系统中的能量损失。

3.The electrical circuit generated significant joule heat 焦耳热 due to high resistance.

由于高电阻，电路产生了显著的joule heat 焦耳热。

4.In a resistive heating element, the joule heat 焦耳热 is produced as current flows through.

在电阻加热元件中，当电流流过时，会产生joule heat 焦耳热。

5.Cooling systems are essential to dissipate joule heat 焦耳热 in high-performance computing.

冷却系统对于散发高性能计算中的joule heat 焦耳热至关重要。

作文

In the field of physics and engineering, understanding the concept of heat generation is crucial. One specific type of heat that often comes up in discussions about electrical systems is joule heat. This term refers to the heat produced when an electric current passes through a conductor. The phenomenon is named after the British physicist James Prescott Joule, who conducted experiments in the mid-19th century that demonstrated the relationship between electricity and heat. Joule heat is a result of the resistance encountered by the electric current as it flows through the material. When electrons move through a conductor, they collide with the atoms of the material, which causes them to vibrate more vigorously. This vibration results in an increase in temperature, leading to the generation of heat.

Understanding joule heat is essential for engineers and designers working on electrical devices. For instance, in power transmission lines, excessive joule heat can lead to energy losses, resulting in inefficient systems and potential hazards. If the heat produced exceeds the material's tolerance, it can cause overheating, which may damage the conductor or lead to catastrophic failures. Therefore, engineers must consider joule heat when designing circuits and selecting materials to ensure safety and efficiency.

Moreover, joule heat plays a significant role in various applications such as electric heaters, resistive heating elements, and even in the functioning of electronic components like transistors and diodes. For example, in electric heaters, joule heat is intentionally generated to provide warmth in residential and industrial settings. Here, the resistance of the heating element is designed to convert electrical energy into thermal energy effectively.

The calculation of joule heat can be done using the formula Q = I²Rt, where Q is the heat energy generated, I is the current in amperes, R is the resistance in ohms, and t is the time in seconds. This equation highlights the direct relationship between the amount of current flowing through a conductor and the heat produced. It also emphasizes the importance of resistance; higher resistance will lead to more heat generation for the same amount of current.

In conclusion, joule heat is a fundamental concept in the study of electricity and thermodynamics. It illustrates how electrical energy can be transformed into thermal energy through resistance in conductors. Recognizing the implications of joule heat is vital for the safe and efficient design of electrical systems. As technology continues to advance, understanding this phenomenon will remain critical in developing new materials and devices that minimize energy loss and enhance performance.

在物理和工程领域，理解热量产生的概念至关重要。在讨论电气系统时，一个经常出现的特定类型的热量是焦耳热。这个术语指的是当电流通过导体时产生的热量。这个现象以英国物理学家詹姆斯·普雷斯科特·焦耳的名字命名，他在19世纪中叶进行了实验，证明了电与热之间的关系。焦耳热是电流在流经材料时遇到的电阻的结果。当电子在导体中移动时，它们会与材料的原子碰撞，这导致它们的振动更加剧烈。这种振动导致温度升高，从而产生热量。

理解焦耳热对从事电气设备工作的工程师和设计师至关重要。例如，在电力传输线路中，过多的焦耳热可能导致能量损失，从而导致系统效率低下和潜在的危险。如果产生的热量超过材料的耐受能力，可能会导致过热，从而损坏导体或导致灾难性故障。因此，工程师在设计电路和选择材料时必须考虑焦耳热，以确保安全和效率。

此外，焦耳热在各种应用中发挥着重要作用，例如电热器、电阻加热元件，甚至在晶体管和二极管等电子元件的功能中。例如，在电热器中，焦耳热是有意生成的，以在住宅和工业环境中提供温暖。在这里，加热元件的电阻被设计成有效地将电能转化为热能。

焦耳热的计算可以使用公式 Q = I²Rt，其中 Q 是产生的热能，I 是安培电流，R 是欧姆电阻，t 是时间（秒）。这个方程强调了流经导体的电流量与产生的热量之间的直接关系。它还强调了电阻的重要性；对于相同的电流，电阻越高，产生的热量就越多。

总之，焦耳热是电力和热力学研究中的一个基本概念。它说明了如何通过导体中的电阻将电能转化为热能。认识到焦耳热的影响对于电气系统的安全和高效设计至关重要。随着技术的不断进步，理解这一现象将继续在开发新材料和设备中发挥关键作用，以最小化能量损失并提高性能。