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*換氣(qi)次數

        例子:風量4萬，風速9m/s，

        得(de)風管(guan)尺寸(cun)=40000/9/3600=1.23平(ping)方

        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、繪制通風或空(kong)調系統軸(zhou)測圖，對各管(guan)段進行編號，標注(zhu)長(chang)度(du)(du)和風量。管(guan)段長(chang)度(du)(du)一般按兩管(guan)件(jian)中心線(xian)長(chang)度(du)(du)計算，不扣除管(guan)件(jian)（如三通，彎頭）本身的長(chang)度(du)(du)。

        2、確定合理的空氣(qi)速(su)流

        風管(guan)(guan)內的空氣(qi)流速(su)對通風、空調(diao)(diao)系(xi)統(tong)(tong)(tong)的經濟型(xing)有較大(da)的影(ying)響(xiang)。流速(su)高，風管(guan)(guan)斷面(mian)小，材料(liao)耗(hao)(hao)用(yong)(yong)(yong)少(shao)(shao)，建造(zao)費用(yong)(yong)(yong)小；但是(shi)系(xi)統(tong)(tong)(tong)的阻力大(da)，動力消(xiao)耗(hao)(hao)增(zeng)大(da)，運用(yong)(yong)(yong)費用(yong)(yong)(yong)增(zeng)加。對除塵(chen)系(xi)統(tong)(tong)(tong)會增(zeng)加設備和(he)管(guan)(guan)道的磨損，對空調(diao)(diao)系(xi)統(tong)(tong)(tong)會增(zeng)加噪聲。流速(su)低(di)，阻力小，動力消(xiao)耗(hao)(hao)少(shao)(shao)；但是(shi)風管(guan)(guan)斷面(mian)大(da)，材料(liao)和(he)建造(zao)費用(yong)(yong)(yong)大(da)，風管(guan)(guan)占用(yong)(yong)(yong)的空間也增(zeng)大(da)。對除塵(chen)系(xi)統(tong)(tong)(tong)流速(su)過(guo)低(di)會使粉塵(chen)沉積堵塞管(guan)(guan)道。