通風(fēng)管道設(shè)計(jì)阻力平衡設(shè)計(jì)計(jì)算

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一、在通風(fēng)系統(tǒng)中的通風(fēng)管道是相互連接的一個(gè)整體，必然得遵循各支路阻力平衡規(guī)律，當(dāng)風(fēng)管系統(tǒng)的結(jié)構(gòu) 形式、管道尺寸一經(jīng)確定，在一定的風(fēng)機(jī)作用下，各段的風(fēng)量是按阻力平衡規(guī)律自動(dòng)分配的。在設(shè)計(jì)計(jì)算時(shí)未經(jīng)阻力平衡計(jì)算，會(huì)導(dǎo)致系統(tǒng)實(shí) 際風(fēng)量分配與設(shè)計(jì)不符。當(dāng)然我們也可以通過(guò)調(diào)節(jié)風(fēng)閥來(lái)分配風(fēng)量，但這樣一來(lái)就又使非不利環(huán)路的風(fēng)壓多余。所以在設(shè)計(jì)計(jì)算時(shí)考慮各環(huán) 路的阻力平衡具有現(xiàn)實(shí)意義。

First, in the ventilation system in the ventilation pipe is a whole connected, 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 is automatically allocated according to the resistance of the law of balance. In the calculation of the design without resistance balance calculation, the system will result in the actual air volume distribution and design. Of course, we can also adjust the air valve to regulate the amount of air, but this will make the most unfavorable loop pressure. So it is of practical significance to consider the resistance balance of each loop in the design calculation.

風(fēng)道系統(tǒng)阻力平衡自動(dòng)計(jì)算的執(zhí)行過(guò)程基本延用常規(guī)設(shè)計(jì)的計(jì)算步驟，主要如下：

Resistance balance duct system automatically calculates the basic implementation process used in conventional design calculation steps are as follows:

①將各節(jié)點(diǎn)間的邏輯關(guān)系、管段的相關(guān)參數(shù)依次輸入并保存，然后根據(jù)技術(shù)要求初步選定各管段的假定風(fēng)速;

The logical relationship between the nodes and the relevant parameters of the pipe segments are input and stored in turn, and then the initial wind speed of each pipe segment is selected according to the technical requirements;

②根據(jù)假定風(fēng)速自動(dòng)計(jì)算管段當(dāng)量水力直徑及阻力損失;

According to the assumed wind speed, the equivalent hydraulic diameter and resistance loss;

③用節(jié)點(diǎn)逆尋法自動(dòng)查找系統(tǒng)各環(huán)路的路徑及阻力損失，并確定系統(tǒng)不利環(huán)路;

Finding the path and the resistance loss of each loop of the system with the method of node inverse searching, and determining the most disadvantageous loop of the system;

④對(duì)非不利環(huán)路進(jìn)行自動(dòng)阻力平衡。

Automatic resistance balance for non disadvantageous loop.

⑤對(duì)計(jì)算結(jié)果進(jìn)行校核。

Check the calculation results.

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