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:風量4萬，風速9m/s，

        得風(feng)管尺(chi)寸(cun)=40000/9/3600=1.23平方

        1.23=1.5*0.82

        所以 風(feng)管(guan)尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪(hui)制通風或(huo)空調系統軸測(ce)圖，對各(ge)管(guan)(guan)段(duan)進行編(bian)號，標注長(chang)度和風量。管(guan)(guan)段(duan)長(chang)度一(yi)般按兩管(guan)(guan)件中心線長(chang)度計算(suan)，不(bu)扣除(chu)管(guan)(guan)件（如(ru)三通，彎頭(tou)）本身(shen)的長(chang)度。

    ;    2、確(que)定合理的空氣速流

        風管內的(de)(de)空氣流速對(dui)(dui)通風、空調系(xi)統(tong)(tong)(tong)的(de)(de)經濟(ji)型有較大的(de)(de)影響。流速高，風管斷(duan)面小，材料耗(hao)(hao)用(yong)少(shao)，建(jian)造(zao)費用(yong)小；但是系(xi)統(tong)(tong)(tong)的(de)(de)阻(zu)力大，動力消耗(hao)(hao)增(zeng)(zeng)(zeng)大，運用(yong)費用(yong)增(zeng)(zeng)(zeng)加。對(dui)(dui)除塵系(xi)統(tong)(tong)(tong)會(hui)(hui)增(zeng)(zeng)(zeng)加設(she)備和(he)管道(dao)的(de)(de)磨損，對(dui)(dui)空調系(xi)統(tong)(tong)(tong)會(hui)(hui)增(zeng)(zeng)(zeng)加噪聲。流速低，阻(zu)力小，動力消耗(hao)(hao)少(shao)；但是風管斷(duan)面大，材料和(he)建(jian)造(zao)費用(yong)大，風管占用(yong)的(de)(de)空間也增(zeng)(zeng)(zeng)大。對(dui)(dui)除塵系(xi)統(tong)(tong)(tong)流速過低會(hui)(hui)使(shi)粉塵沉積堵塞管道(dao)。