戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量(liang)=房間(jian)面積*房間(jian)高*換氣次數

        例(li)子:風量4萬，風速9m/s，

        得風管尺寸=40000/9/3600=1.23平方

        1.23=1.5*0.82

        所以 風管尺(chi)寸為1500*800 。

管道直徑設計計算步驟：

        1、繪制通風或空調(diao)系統軸(zhou)測圖，對各管段進行編號，標注長度和風量。管段長度一般按兩管件中心線長度計算，不扣除管件（如(ru)三通，彎(wan)頭）本身的(de)長度。

        2、確定(ding)合(he)理的空氣(qi)速流

        風(feng)(feng)管(guan)(guan)(guan)內的空氣(qi)流(liu)速對(dui)通(tong)風(feng)(feng)、空調系統(tong)(tong)(tong)的經濟型有較大的影響。流(liu)速高，風(feng)(feng)管(guan)(guan)(guan)斷(duan)面(mian)小，材(cai)料耗用(yong)(yong)(yong)(yong)(yong)少(shao)，建(jian)造費用(yong)(yong)(yong)(yong)(yong)小；但是(shi)系統(tong)(tong)(tong)的阻(zu)力(li)大，動力(li)消(xiao)耗增大，運用(yong)(yong)(yong)(yong)(yong)費用(yong)(yong)(yong)(yong)(yong)增加。對(dui)除塵(chen)系統(tong)(tong)(tong)會(hui)增加設備(bei)和(he)管(guan)(guan)(guan)道的磨(mo)損(sun)，對(dui)空調系統(tong)(tong)(tong)會(hui)增加噪(zao)聲。流(liu)速低，阻(zu)力(li)小，動力(li)消(xiao)耗少(shao)；但是(shi)風(feng)(feng)管(guan)(guan)(guan)斷(duan)面(mian)大，材(cai)料和(he)建(jian)造費用(yong)(yong)(yong)(yong)(yong)大，風(feng)(feng)管(guan)(guan)(guan)占用(yong)(yong)(yong)(yong)(yong)的空間(jian)也增大。對(dui)除塵(chen)系統(tong)(tong)(tong)流(liu)速過低會(hui)使粉塵(chen)沉積堵塞管(guan)(guan)(guan)道。