戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

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

        例子:風量4萬，風速9m/s，

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

        1.23=1.5*0.82

        所以 風(feng)管尺(chi)寸為1500*800 。

管道直徑設計計算步驟：

        1、繪制通風(feng)或(huo)空調系統軸測圖，對各(ge)管(guan)段進行編(bian)號，標注(zhu)長(chang)度和風(feng)量。管(guan)段長(chang)度一(yi)般按兩管(guan)件(jian)中心線長(chang)度計算，不(bu)扣除管(guan)件(jian)（如三通，彎頭）本身的長(chang)度。

        2、確(que)定合理的空氣速(su)流

        風管(guan)(guan)內的空(kong)(kong)氣流(liu)(liu)速對通(tong)風、空(kong)(kong)調系(xi)統(tong)(tong)(tong)的經(jing)濟(ji)型(xing)有較大(da)(da)(da)的影響。流(liu)(liu)速高，風管(guan)(guan)斷面(mian)小(xiao)，材(cai)料(liao)耗(hao)用(yong)少(shao)(shao)，建(jian)造(zao)費用(yong)小(xiao)；但(dan)(dan)是系(xi)統(tong)(tong)(tong)的阻(zu)力(li)(li)大(da)(da)(da)，動力(li)(li)消耗(hao)增大(da)(da)(da)，運用(yong)費用(yong)增加。對除(chu)塵系(xi)統(tong)(tong)(tong)會(hui)(hui)增加設(she)備和(he)管(guan)(guan)道的磨損，對空(kong)(kong)調系(xi)統(tong)(tong)(tong)會(hui)(hui)增加噪聲。流(liu)(liu)速低，阻(zu)力(li)(li)小(xiao)，動力(li)(li)消耗(hao)少(shao)(shao)；但(dan)(dan)是風管(guan)(guan)斷面(mian)大(da)(da)(da)，材(cai)料(liao)和(he)建(jian)造(zao)費用(yong)大(da)(da)(da)，風管(guan)(guan)占用(yong)的空(kong)(kong)間也增大(da)(da)(da)。對除(chu)塵系(xi)統(tong)(tong)(tong)流(liu)(liu)速過低會(hui)(hui)使粉塵沉積堵塞管(guan)(guan)道。