戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量(liang)=房間(jian)面(mian)積*房間(jian)高*換氣次數

        例子:風量4萬，風速(su)9m/s，

        得風管尺寸=40000/9/3600=1.23平方

        1.23=1.5*0.82

        所以(yi) 風管尺寸(cun)為1500*800 。

管道直徑設計計算步驟：

        1、繪制通(tong)風(feng)(feng)或(huo)空調(diao)系統軸測圖(tu)，對各(ge)管段(duan)(duan)進(jin)行編號，標注(zhu)長度(du)和風(feng)(feng)量(liang)。管段(duan)(duan)長度(du)一般按兩管件中(zhong)心線長度(du)計算，不扣除管件（如三通(tong)，彎頭(tou)）本身的長度(du)。

      ;  2、確定合理(li)的空氣(qi)速流

        風管(guan)(guan)內的空(kong)氣流速對(dui)通(tong)風、空(kong)調(diao)系統(tong)(tong)的經(jing)濟(ji)型有較(jiao)大(da)(da)的影響。流速高，風管(guan)(guan)斷(duan)面小(xiao)，材料(liao)耗用(yong)(yong)(yong)少，建造費(fei)用(yong)(yong)(yong)小(xiao)；但(dan)是系統(tong)(tong)的阻(zu)力(li)大(da)(da)，動力(li)消耗增(zeng)大(da)(da)，運用(yong)(yong)(yong)費(fei)用(yong)(yong)(yong)增(zeng)加(jia)。對(dui)除塵(chen)系統(tong)(tong)會增(zeng)加(jia)設備和管(guan)(guan)道的磨(mo)損，對(dui)空(kong)調(diao)系統(tong)(tong)會增(zeng)加(jia)噪聲(sheng)。流速低，阻(zu)力(li)小(xiao)，動力(li)消耗少；但(dan)是風管(guan)(guan)斷(duan)面大(da)(da)，材料(liao)和建造費(fei)用(yong)(yong)(yong)大(da)(da)，風管(guan)(guan)占用(yong)(yong)(yong)的空(kong)間(jian)也增(zeng)大(da)(da)。對(dui)除塵(chen)系統(tong)(tong)流速過低會使粉塵(chen)沉(chen)積堵塞管(guan)(guan)道。