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济南顺发通风管道阻力的设计步骤详解

发布人:http://www。sftfgd。com   发布时间:2017-12-26 15:14:57

在通风系统中的通风管道是相互连接的一个整体,必然得遵循各支路阻力平衡规律,当风管系统的结构 形式、管道尺寸一经确定,在一定的风机作用下,各段的风量是按阻力平衡规律自动分配的。

The ventilation pipe in ventilation systems as a whole are connected with each other, must follow the branch resistance balance law, when the structure, size of pipe duct system is confirmed, the fan under certain sections of the air volume according to the automatic distribution of resistance balance law.

在设计计算时未经阻力平衡计算,会导致系统实 际风量分配与设计不符。当然我们也可以通过调节风阀来分配风量,但这样一来就又使非不利环路的风压多余。所以在设计计算时考虑各环 路的阻力平衡具有现实意义。

Without the calculation of resistance balance in the design and calculation, the actual air volume distribution and design of the system will not conform to the design. Of course, we can also adjust the air volume by adjusting the wind valve, but in this way, the air pressure in the non - most unfavorable loop is redundant. Therefore, it is of practical significance to consider the resistance balance of each loop in the design and calculation.

QQ截图20170428145354.png

然而,不少设计人员在进行风道水力计算及阻力平衡过程中仅仅凭经验估算或查图手算,这样费时费力还达不到理想效果。笔者所设计的计算 软件以excel为工作平台,用vba语言为开发工具,从而确保了程序的执行效率。

However, many designers in the process of air duct hydraulic calculation and resistance balance only by empirical estimation or special hand count, so the time-consuming can not reach the desired effect. The computing software designed by the author uses Excel as the working platform and uses the VBA language as the development tool to ensure the efficiency of the execution of the program.

①将各节点间的逻辑关系、管段的相关参数依次输入并保存,然后根据技术要求初步选定各管段的假定风速;

Firstly, the logical relationship between each node and the relevant parameters of the pipe section are input and saved in turn. Then the assumed wind speed of each section is preliminarily selected according to the technical requirements.

②根据假定风速自动计算管段当量水力直径及阻力损失;

Secondly, according to the assumed wind speed, the equivalent hydraulic diameter and the loss of resistance are calculated automatically。

③用节点逆寻法自动查找系统各环路的路径及阻力损失,并确定系统不利环路;

Thirdly, the path and resistance loss of each loop of the system are searched automatically by the inverse method of node, and the most unfavorable loop of the system is determined.

④对非不利环路进行自动阻力平衡。

(4) the automatic resistance balance is carried out on the non unfavorable loop.

⑤对计算结果进行校核。

Check the results of the calculation.

以上的内容就是关于山东通风管道的知识,你是不是有所了解了呢?希望上面的讲解对你有帮助,更多的内容请点击:http://www.fggsfs.com

The above content is about the knowledge of the Shandong ventilation pipe, do you know something about it? I hope that the above explanation will help you, and more content please click: http://www.fggsfs.com


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