戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房(fang)(fang)間(jian)面積(ji)*房(fang)(fang)間(jian)高*換(huan)氣次數

  ;      例(li)子:風量4萬，風速(su)9m/s，

        得(de)風(feng)管尺寸=40000/9/3600=1.23平方(fang)

        1.23=1.5*0.82

        所以 風(feng)管尺寸為(wei)1500*800 。

管道直徑設計計算步驟：

        1、繪制通(tong)風或(huo)空調系統軸測圖，對各(ge)管段(duan)進行(xing)編號，標注長度(du)(du)和風量。管段(duan)長度(du)(du)一般按兩(liang)管件中心線(xian)長度(du)(du)計(ji)算，不扣除管件（如三通(tong)，彎(wan)頭）本身的長度(du)(du)。

        2、確定合理的空(kong)氣速流(liu)

        風(feng)管(guan)(guan)內的(de)空(kong)(kong)氣流(liu)(liu)速(su)(su)對通風(feng)、空(kong)(kong)調系(xi)(xi)統(tong)(tong)的(de)經濟型有(you)較大(da)的(de)影響。流(liu)(liu)速(su)(su)高，風(feng)管(guan)(guan)斷(duan)(duan)面(mian)(mian)小(xiao)，材料耗(hao)(hao)用(yong)少，建造費(fei)用(yong)小(xiao)；但是系(xi)(xi)統(tong)(tong)的(de)阻力大(da)，動力消耗(hao)(hao)增(zeng)(zeng)(zeng)大(da)，運用(yong)費(fei)用(yong)增(zeng)(zeng)(zeng)加。對除塵系(xi)(xi)統(tong)(tong)會(hui)增(zeng)(zeng)(zeng)加設(she)備和管(guan)(guan)道的(de)磨損(sun)，對空(kong)(kong)調系(xi)(xi)統(tong)(tong)會(hui)增(zeng)(zeng)(zeng)加噪聲。流(liu)(liu)速(su)(su)低，阻力小(xiao)，動力消耗(hao)(hao)少；但是風(feng)管(guan)(guan)斷(duan)(duan)面(mian)(mian)大(da)，材料和建造費(fei)用(yong)大(da)，風(feng)管(guan)(guan)占用(yong)的(de)空(kong)(kong)間也(ye)增(zeng)(zeng)(zeng)大(da)。對除塵系(xi)(xi)統(tong)(tong)流(liu)(liu)速(su)(su)過低會(hui)使粉塵沉積(ji)堵(du)塞(sai)管(guan)(guan)道。