戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風(feng)量=房間(jian)面(mian)積(ji)*房間(jian)高*換氣次(ci)數

        例子:風量4萬(wan)，風速9m/s，

        得風管(guan)尺寸=40000/9/3600=1.23平方(fang)

        1.23=1.5*0.82

 ;       所以 風(feng)管尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪(hui)制(zhi)通(tong)風或空(kong)調系統軸測(ce)圖，對(dui)各管段(duan)進行(xing)編號，標注(zhu)長度和風量。管段(duan)長度一般(ban)按兩管件(jian)中(zhong)心線長度計算，不(bu)扣除管件(jian)（如(ru)三通(tong)，彎(wan)頭）本身的長度。

        2、確定(ding)合理(li)的空氣速流

        風(feng)(feng)(feng)管(guan)內的空氣流(liu)速對通風(feng)(feng)(feng)、空調系(xi)統(tong)(tong)的經濟型(xing)有(you)較(jiao)大(da)的影響。流(liu)速高(gao)，風(feng)(feng)(feng)管(guan)斷面小(xiao)，材料(liao)耗用(yong)(yong)(yong)少，建造費(fei)用(yong)(yong)(yong)小(xiao)；但(dan)(dan)是系(xi)統(tong)(tong)的阻力大(da)，動力消耗增(zeng)大(da)，運用(yong)(yong)(yong)費(fei)用(yong)(yong)(yong)增(zeng)加(jia)。對除(chu)塵系(xi)統(tong)(tong)會(hui)增(zeng)加(jia)設備和管(guan)道的磨損，對空調系(xi)統(tong)(tong)會(hui)增(zeng)加(jia)噪聲。流(liu)速低，阻力小(xiao)，動力消耗少；但(dan)(dan)是風(feng)(feng)(feng)管(guan)斷面大(da)，材料(liao)和建造費(fei)用(yong)(yong)(yong)大(da)，風(feng)(feng)(feng)管(guan)占用(yong)(yong)(yong)的空間也(ye)增(zeng)大(da)。對除(chu)塵系(xi)統(tong)(tong)流(liu)速過低會(hui)使粉塵沉積堵塞管(guan)道。