戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房間(jian)面積*房間(jian)高*換氣次數

        例子(zi):風量4萬，風速(su)9m/s，

        得風管尺(chi)寸=40000/9/3600=1.23平方(fang)

    ;    1.23=1.5*0.82

        所(suo)以(yi) 風管尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪(hui)制通(tong)(tong)風或空調系(xi)統軸測圖，對各管(guan)段進行編號(hao)，標注(zhu)長度和風量。管(guan)段長度一般按(an)兩(liang)管(guan)件(jian)中心線長度計算，不(bu)扣除管(guan)件(jian)（如三通(tong)(tong)，彎頭）本身的長度。

        2、確定合(he)理的(de)空氣速流

        風管(guan)(guan)內的空氣流速對(dui)通風、空調系(xi)統(tong)的經濟型有較大的影響。流速高，風管(guan)(guan)斷面小(xiao)(xiao)，材(cai)料(liao)耗用(yong)(yong)(yong)少，建(jian)造費(fei)用(yong)(yong)(yong)小(xiao)(xiao)；但是系(xi)統(tong)的阻力大，動力消耗增(zeng)(zeng)大，運用(yong)(yong)(yong)費(fei)用(yong)(yong)(yong)增(zeng)(zeng)加。對(dui)除塵系(xi)統(tong)會(hui)增(zeng)(zeng)加設備和管(guan)(guan)道的磨損，對(dui)空調系(xi)統(tong)會(hui)增(zeng)(zeng)加噪(zao)聲。流速低，阻力小(xiao)(xiao)，動力消耗少；但是風管(guan)(guan)斷面大，材(cai)料(liao)和建(jian)造費(fei)用(yong)(yong)(yong)大，風管(guan)(guan)占用(yong)(yong)(yong)的空間也(ye)增(zeng)(zeng)大。對(dui)除塵系(xi)統(tong)流速過低會(hui)使粉(fen)塵沉積堵(du)塞管(guan)(guan)道。