effective chimney height

简明释义

有效烟囱高度

英英释义

例句

1.To improve draft, we need to measure the effective chimney height accurately.

为了改善气流，我们需要准确测量有效烟囱高度。

2.Increasing the effective chimney height can help reduce smoke backflow into the house.

增加有效烟囱高度可以帮助减少烟雾回流到房屋内。

3.The engineer calculated the effective chimney height to ensure proper ventilation in the building.

工程师计算了有效烟囱高度以确保建筑物的通风良好。

4.The effective chimney height is crucial for ensuring that emissions disperse properly.

确保排放物正确扩散的关键在于有效烟囱高度。

5.Local regulations often dictate the minimum effective chimney height for safety reasons.

当地法规通常规定出于安全原因的最低有效烟囱高度。

作文

In the field of environmental engineering and air quality management, the concept of effective chimney height is crucial for understanding how pollutants disperse in the atmosphere. The effective chimney height refers to the height at which emissions from a chimney are released into the atmosphere and can effectively mix with the air, helping to reduce ground-level concentrations of harmful pollutants. This concept is essential for designing chimneys and stacks that minimize the impact of industrial emissions on the surrounding environment.When considering the effective chimney height, several factors come into play. Firstly, the physical height of the chimney itself is important, but it is not the only determinant. The temperature of the gases being emitted, the velocity at which they are released, and the local meteorological conditions all influence how far pollutants can travel before they settle back to the ground. For instance, warmer gases tend to rise higher into the atmosphere, increasing the effective chimney height and allowing for better dispersion of pollutants.Moreover, the surrounding topography plays a significant role in determining the effective chimney height. In areas with tall buildings or mountains, the flow of air can be disrupted, leading to a phenomenon known as 'downwash,' where the emissions are pushed downward instead of dispersing upwards. This can significantly reduce the effective chimney height and increase the concentration of pollutants in the vicinity of the source.To illustrate the importance of effective chimney height, consider a factory located in an urban area. If the factory's chimney is designed without taking into account the effective chimney height, it may lead to increased levels of particulate matter and other harmful substances in the air, posing health risks to the local population. Therefore, engineers must conduct thorough studies to determine the optimal height and design of chimneys to ensure that emissions are adequately dispersed.Regulatory agencies often set guidelines for the minimum effective chimney height based on the type of industry and the potential pollutants involved. These regulations aim to protect public health and the environment by ensuring that emissions are diluted sufficiently before reaching ground level. Compliance with these regulations requires ongoing monitoring and assessment of emissions, as well as the implementation of best practices in chimney design.In conclusion, the concept of effective chimney height is a vital aspect of environmental engineering that impacts air quality and public health. By understanding the factors that influence this height, engineers can design more effective emission control systems that mitigate the adverse effects of industrial activities. As industries continue to evolve and expand, the importance of optimizing effective chimney height will remain a key consideration in promoting sustainable development and protecting the environment.

在环境工程和空气质量管理领域，有效烟囱高度的概念对于理解污染物在大气中的扩散至关重要。有效烟囱高度是指烟囱排放的气体进入大气并能够有效混合的高度，这有助于减少有害污染物在地面上的浓度。这个概念对于设计能够最小化工业排放对周围环境影响的烟囱和排气管至关重要。在考虑有效烟囱高度时，有几个因素需要考虑。首先，烟囱本身的物理高度很重要，但这并不是唯一的决定因素。排放气体的温度、释放速度以及当地气象条件都会影响污染物在沉降到地面之前能传播多远。例如，较温暖的气体往往会上升到更高的高度，从而增加有效烟囱高度，允许污染物更好地扩散。此外，周围的地形在确定有效烟囱高度方面也发挥着重要作用。在高楼大厦或山脉的地区，空气流动可能会受到干扰，导致一种称为“下洗”的现象，即排放物被推向下方而不是向上扩散。这可能显著降低有效烟囱高度，并增加污染物在源附近的浓度。为了说明有效烟囱高度的重要性，考虑一下位于城市地区的工厂。如果该工厂的烟囱设计没有考虑到有效烟囱高度，可能会导致空气中颗粒物和其他有害物质的水平升高，对当地居民的健康构成风险。因此，工程师必须进行深入研究，以确定烟囱的最佳高度和设计，以确保排放物得到充分扩散。监管机构通常会根据行业类型和潜在污染物设定最低有效烟囱高度的指导方针。这些规定旨在通过确保排放物在达到地面之前得到充分稀释来保护公众健康和环境。遵守这些规定需要对排放物进行持续监测和评估，以及实施烟囱设计的最佳实践。总之，有效烟囱高度的概念是影响空气质量和公众健康的重要环境工程方面。通过理解影响这一高度的因素，工程师可以设计出更有效的排放控制系统，从而减轻工业活动的不利影响。随着工业的不断发展和扩展，优化有效烟囱高度的重要性将继续成为促进可持续发展和保护环境的关键考虑因素。