excess air

简明释义

过量空气

英英释义

例句

1.Monitoring excess air 过量空气 levels is crucial for optimizing industrial furnace operations.

监测excess air 过量空气水平对于优化工业炉操作至关重要。

2.The boiler's performance improved significantly after reducing excess air 过量空气 in the combustion chamber.

在燃烧室减少excess air 过量空气后，锅炉的性能显著改善。

3.An increase in excess air 过量空气 can lead to higher emissions of nitrogen oxides.

增加excess air 过量空气可能会导致氮氧化物排放增加。

4.The engineer adjusted the burner to minimize excess air 过量空气 and improve fuel economy.

工程师调整了燃烧器，以减少excess air 过量空气并提高燃料经济性。

5.In combustion processes, too much excess air 过量空气 can lower the efficiency of the system.

在燃烧过程中，过多的excess air 过量空气可能会降低系统的效率。

作文

In the field of combustion engineering, the term excess air refers to the amount of air supplied for combustion that exceeds the theoretical requirement for complete combustion of the fuel. Understanding excess air is crucial for optimizing combustion processes, improving efficiency, and minimizing emissions. When fossil fuels such as natural gas, coal, or oil are burned, they react with oxygen from the air to produce energy, carbon dioxide, and water. The ideal scenario is to have just enough air to completely burn the fuel without leaving any unburned hydrocarbons or producing excessive nitrogen oxides (NOx). However, in practice, it is common to introduce a certain amount of excess air to ensure that all fuel is combusted thoroughly.The primary reason for using excess air is to achieve complete combustion. If there is not enough air, some fuel may remain unburned, leading to inefficient energy production and the release of harmful pollutants. In contrast, using too much air can dilute the combustion process, which can also lead to inefficiencies. Therefore, the goal is to find the optimal balance. Typically, combustion systems are designed to operate with about 10% to 30% excess air, depending on the type of fuel and the specific application.Another important aspect of excess air is its impact on the efficiency of thermal systems. When excess air is present, it absorbs heat during the combustion process, which can lower the overall temperature of the combustion gases. This reduction in temperature can result in lower thermal efficiency, meaning that not all the energy produced is converted into usable work. Thus, while excess air is necessary for complete combustion, it is equally important to limit it to avoid unnecessary energy loss.Moreover, excess air plays a significant role in controlling emissions. Combustion processes that operate with insufficient air can generate higher levels of carbon monoxide (CO) and unburned hydrocarbons, both of which are harmful to the environment. By ensuring that there is an adequate supply of excess air, operators can significantly reduce these emissions. However, it is essential to monitor the levels closely, as too much excess air can lead to increased nitrogen oxide emissions due to higher flame temperatures.In conclusion, while excess air is vital for achieving complete combustion and minimizing harmful emissions, it must be carefully controlled to optimize efficiency. Engineers and operators must continuously monitor combustion conditions and adjust the air-to-fuel ratio accordingly. By doing so, they can ensure that energy is produced efficiently and sustainably, benefiting both the economy and the environment. Understanding the concept of excess air and its implications is essential for anyone involved in combustion processes, whether in industrial settings or residential heating applications. Ultimately, mastering the balance of excess air is a key factor in the quest for cleaner and more efficient energy production.

在燃烧工程领域，短语excess air指的是为燃烧提供的空气量，超过了完全燃烧燃料所需的理论要求。理解excess air对于优化燃烧过程、提高效率和减少排放至关重要。当天然气、煤或石油等化石燃料燃烧时，它们与来自空气的氧气反应，产生能量、二氧化碳和水。理想的情况是有足够的空气来完全燃烧燃料，而不留下任何未燃烧的碳氢化合物或产生过多的氮氧化物（NOx）。然而，实际上，通常会引入一定量的excess air以确保燃料被充分燃烧。使用excess air的主要原因是实现完全燃烧。如果空气不足，部分燃料可能会未燃烧，从而导致能量生产效率低下并释放有害污染物。相比之下，使用过多的空气会稀释燃烧过程，这也会导致效率低下。因此，目标是找到最佳平衡。通常，燃烧系统设计为在约10%到30%的excess air下运行，具体取决于燃料类型和特定应用。此外，excess air对热系统的效率也有重要影响。当存在excess air时，它在燃烧过程中吸收热量，这可能降低燃烧气体的总体温度。这种温度降低可能导致热效率降低，意味着不是所有产生的能量都转化为可用的工作。因此，虽然excess air对于实现完全燃烧是必要的，但同样重要的是限制它，以避免不必要的能量损失。此外，excess air在控制排放方面也发挥着重要作用。运行不足空气的燃烧过程可能会产生较高水平的一氧化碳（CO）和未燃烧的碳氢化合物，这些都是对环境有害的。通过确保有足够的excess air供应，操作员可以显著减少这些排放。然而，必须密切监测这些水平，因为过多的excess air可能导致由于更高的火焰温度而增加氮氧化物排放。总之，虽然excess air对于实现完全燃烧和最小化有害排放至关重要，但必须仔细控制以优化效率。工程师和操作员必须不断监测燃烧条件，并相应调整空气与燃料的比率。通过这样做，他们可以确保有效和可持续地产生能源，造福经济和环境。理解excess air的概念及其影响对于任何参与燃烧过程的人来说都是必不可少的，无论是在工业环境还是住宅供暖应用中。最终，掌握excess air的平衡是追求更清洁、更高效能源生产的关键因素。