戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房間面(mian)積*房間高*換氣(qi)次數

   ;     例(li)子:風(feng)量4萬(wan)，風(feng)速(su)9m/s，

        得風(feng)管尺寸=40000/9/3600=1.23平方

        1.23=1.5*0.82

        所(suo)以 風(feng)管尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪制通風或空調系統(tong)軸測圖，對各管(guan)(guan)段進行編號，標注長度(du)和風量。管(guan)(guan)段長度(du)一般按兩管(guan)(guan)件(jian)中(zhong)心(xin)線(xian)長度(du)計算，不扣除管(guan)(guan)件(jian)（如三通，彎頭）本身(shen)的(de)長度(du)。

        2、確定(ding)合理的空(kong)氣速流(liu)

        風(feng)(feng)管(guan)(guan)(guan)內的(de)空氣流速(su)對通風(feng)(feng)、空調系(xi)(xi)(xi)(xi)統(tong)的(de)經濟(ji)型有較大(da)的(de)影響。流速(su)高，風(feng)(feng)管(guan)(guan)(guan)斷(duan)(duan)面(mian)小，材料(liao)耗用(yong)(yong)(yong)少(shao)，建(jian)造費用(yong)(yong)(yong)小；但(dan)是系(xi)(xi)(xi)(xi)統(tong)的(de)阻(zu)力(li)(li)大(da)，動力(li)(li)消耗增(zeng)(zeng)大(da)，運用(yong)(yong)(yong)費用(yong)(yong)(yong)增(zeng)(zeng)加(jia)(jia)。對除塵系(xi)(xi)(xi)(xi)統(tong)會(hui)增(zeng)(zeng)加(jia)(jia)設(she)備和管(guan)(guan)(guan)道的(de)磨損(sun)，對空調系(xi)(xi)(xi)(xi)統(tong)會(hui)增(zeng)(zeng)加(jia)(jia)噪聲。流速(su)低，阻(zu)力(li)(li)小，動力(li)(li)消耗少(shao)；但(dan)是風(feng)(feng)管(guan)(guan)(guan)斷(duan)(duan)面(mian)大(da)，材料(liao)和建(jian)造費用(yong)(yong)(yong)大(da)，風(feng)(feng)管(guan)(guan)(guan)占(zhan)用(yong)(yong)(yong)的(de)空間也增(zeng)(zeng)大(da)。對除塵系(xi)(xi)(xi)(xi)統(tong)流速(su)過低會(hui)使粉塵沉積(ji)堵塞管(guan)(guan)(guan)道。