power factor

简明释义

功率因数

英英释义

例句

1.A power factor 功率因数 close to 1 indicates efficient use of electrical power.

功率因数 功率因数接近1表示电能的高效利用。

2.To reduce electricity costs, it's important to monitor the power factor 功率因数 regularly.

为了降低电费，定期监控功率因数 功率因数是很重要的。

3.The efficiency of the electrical system can be improved by increasing the power factor 功率因数.

通过提高电气系统的功率因数 功率因数，可以提高效率。

4.Installing power factor correction capacitors can help improve the power factor 功率因数 of your facility.

安装功率因数校正电容器可以帮助改善您设施的功率因数 功率因数。

5.Many industrial facilities are penalized for having a low power factor 功率因数.

许多工业设施因低功率因数 功率因数而受到惩罚。

作文

Understanding the concept of power factor is essential for anyone involved in electrical engineering or energy management. The power factor is a measure of how effectively electrical power is being converted into useful work output. It is defined as the ratio of real power, which does the useful work, to apparent power, which is the product of the current and voltage in an electrical system. The power factor can range from 0 to 1, where a value closer to 1 indicates efficient utilization of electrical power.In practical terms, a power factor of 1 means that all the power supplied by the utility is being used effectively. This scenario occurs when the load is purely resistive, meaning that it does not have any inductive or capacitive characteristics. For example, incandescent light bulbs and electric heaters typically have a power factor close to 1 because they convert almost all the electrical energy into heat or light without any loss.On the other hand, many industrial machines, such as motors and transformers, often operate with a power factor less than 1. This situation arises due to the presence of inductive loads, which cause a phase difference between the voltage and current. When the power factor is low, it indicates that a significant portion of the electrical power is not being used for productive work, leading to inefficiencies and increased costs. Utilities may charge higher rates to customers with low power factor because they have to generate more power to compensate for the wasted energy.Improving the power factor is crucial for both economic and environmental reasons. By using power factor correction devices, such as capacitors or synchronous condensers, businesses can enhance their power factor and reduce their overall energy consumption. These devices work by counteracting the inductive effects of machinery, thus bringing the power factor closer to unity. This improvement not only lowers electricity bills but also reduces the strain on the electrical grid, contributing to a more sustainable energy future.Moreover, understanding power factor is vital for designing electrical systems. Engineers must consider the power factor when sizing generators, transformers, and conductors. A low power factor can lead to overheating and inefficiencies in these components, potentially causing failures or reducing their lifespan. Therefore, maintaining a high power factor is a key aspect of reliable and efficient electrical system design.In conclusion, the power factor is a fundamental concept in electrical engineering that reflects the efficiency of power usage in electrical systems. By striving for a higher power factor, industries can save money, improve system reliability, and contribute to environmental sustainability. As we move towards a future that increasingly relies on electrical energy, understanding and managing the power factor will become even more critical for both individual consumers and large-scale energy producers.

理解功率因数的概念对任何参与电气工程或能源管理的人来说都是至关重要的。功率因数是有效地将电能转换为有用工作输出的度量。它被定义为实际功率（做有用工作的功率）与视在功率（电流和电压在电气系统中的乘积）的比率。功率因数的范围从0到1，其中接近1的值表示电能的有效利用。在实际操作中，功率因数为1意味着公用事业提供的所有电力都被有效利用。这种情况发生在负载是纯电阻时，这意味着它没有任何感性或容性特征。例如，白炽灯泡和电热器通常具有接近1的功率因数，因为它们几乎将所有电能转化为热量或光，而没有任何损失。另一方面，许多工业机器，如电动机和变压器，通常以小于1的功率因数运行。这种情况由于存在感性负载而产生，导致电压和电流之间存在相位差。当功率因数较低时，表明相当一部分电力未用于生产性工作，导致效率低下和成本增加。公用事业公司可能会向低功率因数的客户收取更高的费用，因为他们必须产生更多的电力以补偿浪费的能量。提高功率因数对经济和环境原因至关重要。通过使用功率因数校正设备，如电容器或同步调相机，企业可以提高其功率因数并减少整体能耗。这些设备通过抵消机械的感性效应来工作，从而使功率因数更接近于1。此改善不仅降低了电费，还减轻了电网的压力，有助于可持续能源的未来。此外，理解功率因数对于设计电气系统至关重要。工程师在确定发电机、变压器和导体的尺寸时必须考虑功率因数。低功率因数可能导致这些组件过热和效率低下，可能导致故障或缩短其使用寿命。因此，保持高功率因数是可靠和高效电气系统设计的关键方面。总之，功率因数是电气工程中的一个基本概念，反映了电气系统中电力使用的效率。通过努力实现更高的功率因数，工业可以节省资金、提高系统可靠性，并为环境可持续性做出贡献。随着我们朝着越来越依赖电能的未来发展，理解和管理功率因数将对个人消费者和大规模能源生产者变得更加重要。