戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房(fang)間面積*房(fang)間高(gao)*換(huan)氣(qi)次數

        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(suo)以 風管尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪制通(tong)風(feng)或空調系統軸(zhou)測(ce)圖，對(dui)各管(guan)段(duan)進行編號，標注(zhu)長度(du)和風(feng)量。管(guan)段(duan)長度(du)一般按兩(liang)管(guan)件中心線長度(du)計算(suan)，不(bu)扣(kou)除管(guan)件（如三通(tong)，彎頭(tou)）本身的長度(du)。

        2、確定合理的空(kong)氣速流

        風(feng)管(guan)內的空(kong)(kong)氣流(liu)速(su)對通風(feng)、空(kong)(kong)調系(xi)(xi)(xi)統(tong)(tong)(tong)的經濟型有較大(da)(da)的影(ying)響。流(liu)速(su)高，風(feng)管(guan)斷面小(xiao)(xiao)(xiao)，材料(liao)耗(hao)用少，建造費(fei)(fei)用小(xiao)(xiao)(xiao)；但(dan)是系(xi)(xi)(xi)統(tong)(tong)(tong)的阻力大(da)(da)，動力消(xiao)(xiao)耗(hao)增(zeng)大(da)(da)，運用費(fei)(fei)用增(zeng)加(jia)。對除(chu)塵系(xi)(xi)(xi)統(tong)(tong)(tong)會(hui)(hui)增(zeng)加(jia)設備(bei)和(he)管(guan)道的磨損(sun)，對空(kong)(kong)調系(xi)(xi)(xi)統(tong)(tong)(tong)會(hui)(hui)增(zeng)加(jia)噪聲。流(liu)速(su)低(di)(di)，阻力小(xiao)(xiao)(xiao)，動力消(xiao)(xiao)耗(hao)少；但(dan)是風(feng)管(guan)斷面大(da)(da)，材料(liao)和(he)建造費(fei)(fei)用大(da)(da)，風(feng)管(guan)占(zhan)用的空(kong)(kong)間(jian)也增(zeng)大(da)(da)。對除(chu)塵系(xi)(xi)(xi)統(tong)(tong)(tong)流(liu)速(su)過低(di)(di)會(hui)(hui)使粉塵沉積堵(du)塞(sai)管(guan)道。