濟(jì)南順發(fā)通風(fēng)管道阻力的設(shè)計(jì)步驟詳解

發(fā)布人：http://rdhw.com.cn   發(fā)布時(shí)間：2017-12-26 15:14:57

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.

在設(shè)計(jì)計(jì)算時(shí)未經(jīng)阻力平衡計(jì)算，會導(dǎo)致系統(tǒng)實(shí) 際風(fēng)量分配與設(shè)計(jì)不符。當(dāng)然我們也可以通過調(diào)節(jié)風(fēng)閥來分配風(fēng)量，但這樣一來就又使非不利環(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。

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.

然而，不少設(shè)計(jì)人員在進(jìn)行風(fēng)道水力計(jì)算及阻力平衡過程中僅僅憑經(jīng)驗(yàn)估算或查圖手算，這樣費(fèi)時(shí)費(fèi)力還達(dá)不到理想效果。筆者所設(shè)計(jì)的計(jì)算 軟件以excel為工作平臺，用vba語言為開發(fā)工具，從而確保了程序的執(zhí)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;

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

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

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

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對非不利環(huán)路進(jìn)行自動阻力平衡。

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

⑤對計(jì)算結(jié)果進(jìn)行校核。

Check the results of the calculation.

以上的內(nèi)容就是關(guān)于山東通風(fēng)管道的知識，你是不是有所了解了呢？希望上面的講解對你有幫助，更多的內(nèi)容請點(diǎn)擊：http://rdhw.com.cn

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://rdhw.com.cn