excess air ratio

简明释义

过剩空气系数

英英释义

例句

1.A high excess air ratio can lead to increased fuel consumption.

高过量空气比可能导致燃料消耗增加。

2.Adjusting the excess air ratio helps in reducing harmful emissions from power plants.

调整过量空气比有助于减少发电厂的有害排放。

3.Monitoring the excess air ratio is crucial for maintaining air quality in industrial processes.

监测过量空气比对维持工业过程中的空气质量至关重要。

4.The optimal excess air ratio for this boiler is 1.2.

该锅炉的最佳过量空气比为1.2。

5.The combustion efficiency can be improved by optimizing the excess air ratio.

通过优化过量空气比可以提高燃烧效率。

作文

In the field of combustion engineering, understanding the concept of excess air ratio is crucial for optimizing fuel efficiency and minimizing emissions. The excess air ratio refers to the amount of air provided in a combustion process compared to the theoretical amount required for complete combustion of the fuel. When we talk about theoretical combustion, it means that all the fuel is burned completely with no leftover fuel or oxygen. However, in practical applications, achieving perfect combustion is nearly impossible due to various factors such as fuel quality, burner design, and operating conditions. Therefore, engineers often introduce more air than what is theoretically necessary, leading to a situation where there is an excess of air present in the combustion process.The excess air ratio can be defined mathematically as the ratio of the actual amount of air used in the combustion process to the stoichiometric amount of air that is needed. A ratio greater than one indicates that there is excess air, while a ratio of one indicates that the air supplied is just enough for complete combustion. For instance, if a combustion system has an excess air ratio of 1.2, it means that 20% more air is being supplied than what is theoretically required. This excess air can have both positive and negative effects on the combustion process.On the positive side, having an appropriate level of excess air ratio can help ensure that all the fuel is burned efficiently, thereby reducing the formation of pollutants such as carbon monoxide (CO) and unburned hydrocarbons. It also helps in achieving a more stable flame and reduces the risk of incomplete combustion, which can lead to dangerous situations like explosions or the release of harmful gases. Moreover, maintaining a proper excess air ratio can enhance the overall thermal efficiency of the system by allowing for better heat transfer within the combustion chamber.However, too much excess air can lead to several drawbacks. An excessively high excess air ratio can result in lower flame temperatures, which may not be sufficient for achieving complete combustion. This can lead to increased emissions of nitrogen oxides (NOx), which are harmful pollutants. Additionally, excess air can cause heat losses due to the larger volume of flue gases that need to be heated, ultimately reducing the overall efficiency of the combustion system. Therefore, finding the optimal excess air ratio is essential for balancing efficiency and emissions.In conclusion, the excess air ratio plays a vital role in combustion processes across various industries, including power generation, manufacturing, and residential heating. Understanding and controlling this ratio is key to achieving efficient combustion, reducing pollutants, and improving energy utilization. Engineers must carefully analyze and adjust the excess air ratio to meet specific operational requirements and environmental regulations. As technology advances, new methods and tools are being developed to measure and control the excess air ratio more accurately, paving the way for cleaner and more efficient combustion systems in the future.

在燃烧工程领域，理解“excess air ratio”这一概念对于优化燃料效率和减少排放至关重要。“excess air ratio”指的是在燃烧过程中提供的空气量与完全燃烧所需的理论空气量之间的比率。当我们谈论理论燃烧时，这意味着所有的燃料都被完全燃烧，没有剩余的燃料或氧气。然而，在实际应用中，由于燃料质量、燃烧器设计和操作条件等各种因素，达到完美燃烧几乎是不可能的。因此，工程师们通常会引入比理论上所需的更多空气，导致在燃烧过程中存在空气过剩。“excess air ratio”可以通过数学公式定义为实际在燃烧过程中使用的空气量与所需的化学计量空气量的比率。大于1的比率表示存在过量空气，而1的比率表示提供的空气正好足够完成燃烧。例如，如果一个燃烧系统的“excess air ratio”为1.2，这意味着提供的空气比理论上所需的多出20%。这种过量空气对燃烧过程有正面和负面的影响。从积极的一面来看，适当的“excess air ratio”可以确保所有燃料高效燃烧，从而减少一氧化碳（CO）和未燃烃等污染物的形成。它还有助于实现更稳定的火焰，并减少不完全燃烧带来的危险情况，例如爆炸或有害气体的释放。此外，保持适当的“excess air ratio”可以通过改善燃烧室内的热传递来提高系统的整体热效率。然而，过多的过量空气会导致一些缺点。过高的“excess air ratio”可能导致火焰温度降低，这可能不足以实现完全燃烧。这可能导致氮氧化物（NOx）的排放增加，这些都是有害的污染物。此外，过量空气可能会导致由于需要加热的烟气体积增大而造成的热损失，最终降低燃烧系统的整体效率。因此，找到最佳的“excess air ratio”对于平衡效率和排放至关重要。总之，“excess air ratio”在各个行业的燃烧过程中发挥着至关重要的作用，包括发电、制造和住宅供暖。理解和控制这一比率是实现高效燃烧、减少污染物和改善能源利用的关键。工程师必须仔细分析和调整“excess air ratio”，以满足特定的操作要求和环境法规。随着技术的进步，正在开发新的方法和工具，以更准确地测量和控制“excess air ratio”，为未来更清洁、更高效的燃烧系统铺平道路。