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)面積*房間(jian)高*換(huan)氣次數

        例子:風(feng)量4萬，風(feng)速9m/s，

        得風(feng)管尺寸=40000/9/3600=1.23平(ping)方

        1.23=1.5*0.82

   ;     所以 風管尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪(hui)制通風或空(kong)調系統軸(zhou)測圖(tu)，對(dui)各管(guan)段(duan)進行(xing)編號，標注長(chang)度(du)和風量。管(guan)段(duan)長(chang)度(du)一般按兩管(guan)件中(zhong)心線長(chang)度(du)計(ji)算，不扣除(chu)管(guan)件（如三通，彎頭）本身的長(chang)度(du)。

        2、確定合理的空氣速流

        風(feng)(feng)(feng)管(guan)(guan)內的空氣流(liu)(liu)速(su)對通風(feng)(feng)(feng)、空調系(xi)統(tong)(tong)(tong)(tong)的經濟型有較大(da)的影響。流(liu)(liu)速(su)高(gao)，風(feng)(feng)(feng)管(guan)(guan)斷(duan)(duan)面(mian)小(xiao)，材料(liao)耗(hao)用少(shao)，建造(zao)費用小(xiao)；但是(shi)系(xi)統(tong)(tong)(tong)(tong)的阻力(li)(li)大(da)，動力(li)(li)消(xiao)耗(hao)增(zeng)大(da)，運(yun)用費用增(zeng)加。對除塵系(xi)統(tong)(tong)(tong)(tong)會增(zeng)加設備和管(guan)(guan)道(dao)的磨損，對空調系(xi)統(tong)(tong)(tong)(tong)會增(zeng)加噪聲(sheng)。流(liu)(liu)速(su)低(di)，阻力(li)(li)小(xiao)，動力(li)(li)消(xiao)耗(hao)少(shao)；但是(shi)風(feng)(feng)(feng)管(guan)(guan)斷(duan)(duan)面(mian)大(da)，材料(liao)和建造(zao)費用大(da)，風(feng)(feng)(feng)管(guan)(guan)占用的空間(jian)也增(zeng)大(da)。對除塵系(xi)統(tong)(tong)(tong)(tong)流(liu)(liu)速(su)過低(di)會使粉塵沉(chen)積堵塞管(guan)(guan)道(dao)。