戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房間面積*房間高(gao)*換氣次數(shu)

 ;       例子:風量4萬(wan)，風速9m/s，

        得風管尺寸(cun)=40000/9/3600=1.23平方

        1.23=1.5*0.82

        所以 風管尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪制(zhi)通風(feng)或空(kong)調系統軸(zhou)測(ce)圖，對各(ge)管段進行編(bian)號，標(biao)注長(chang)(chang)(chang)度(du)和(he)風(feng)量(liang)。管段長(chang)(chang)(chang)度(du)一般按(an)兩管件中心線長(chang)(chang)(chang)度(du)計算，不扣除管件（如(ru)三通，彎頭）本身(shen)的(de)長(chang)(chang)(chang)度(du)。

        2、確定合(he)理(li)的空氣(qi)速流

        風(feng)管內的(de)空(kong)(kong)氣(qi)流速對通風(feng)、空(kong)(kong)調系(xi)(xi)統(tong)(tong)的(de)經(jing)濟型有較大(da)的(de)影響。流速高，風(feng)管斷(duan)面(mian)小，材料(liao)耗(hao)用(yong)(yong)少，建造費用(yong)(yong)小；但(dan)是系(xi)(xi)統(tong)(tong)的(de)阻力大(da)，動(dong)(dong)力消耗(hao)增(zeng)(zeng)大(da)，運用(yong)(yong)費用(yong)(yong)增(zeng)(zeng)加。對除(chu)塵系(xi)(xi)統(tong)(tong)會(hui)增(zeng)(zeng)加設備和管道的(de)磨損，對空(kong)(kong)調系(xi)(xi)統(tong)(tong)會(hui)增(zeng)(zeng)加噪聲。流速低，阻力小，動(dong)(dong)力消耗(hao)少；但(dan)是風(feng)管斷(duan)面(mian)大(da)，材料(liao)和建造費用(yong)(yong)大(da)，風(feng)管占用(yong)(yong)的(de)空(kong)(kong)間也(ye)增(zeng)(zeng)大(da)。對除(chu)塵系(xi)(xi)統(tong)(tong)流速過低會(hui)使粉塵沉積(ji)堵(du)塞管道。