戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

    ;    風量=房間面積*房間高*換氣次數(shu)

        例子:風量4萬(wan)，風速9m/s，

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

        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(zhi)通風或空調系統軸測圖，對各(ge)管(guan)段(duan)進(jin)行編號，標注(zhu)長(chang)(chang)(chang)度(du)和風量。管(guan)段(duan)長(chang)(chang)(chang)度(du)一般(ban)按兩管(guan)件(jian)中心線長(chang)(chang)(chang)度(du)計算，不扣除管(guan)件(jian)（如三通，彎頭(tou)）本(ben)身(shen)的長(chang)(chang)(chang)度(du)。

        2、確定合(he)理的空氣速流

        風(feng)管內的空(kong)氣(qi)流(liu)速(su)對(dui)(dui)通風(feng)、空(kong)調(diao)系統(tong)(tong)的經濟型有較大(da)的影響(xiang)。流(liu)速(su)高，風(feng)管斷(duan)(duan)面小(xiao)(xiao)，材料(liao)耗(hao)用(yong)(yong)(yong)少，建(jian)造費用(yong)(yong)(yong)小(xiao)(xiao)；但(dan)是系統(tong)(tong)的阻力大(da)，動力消(xiao)耗(hao)增(zeng)(zeng)(zeng)大(da)，運用(yong)(yong)(yong)費用(yong)(yong)(yong)增(zeng)(zeng)(zeng)加(jia)(jia)。對(dui)(dui)除塵系統(tong)(tong)會(hui)(hui)增(zeng)(zeng)(zeng)加(jia)(jia)設備和管道(dao)的磨損，對(dui)(dui)空(kong)調(diao)系統(tong)(tong)會(hui)(hui)增(zeng)(zeng)(zeng)加(jia)(jia)噪聲(sheng)。流(liu)速(su)低，阻力小(xiao)(xiao)，動力消(xiao)耗(hao)少；但(dan)是風(feng)管斷(duan)(duan)面大(da)，材料(liao)和建(jian)造費用(yong)(yong)(yong)大(da)，風(feng)管占用(yong)(yong)(yong)的空(kong)間(jian)也(ye)增(zeng)(zeng)(zeng)大(da)。對(dui)(dui)除塵系統(tong)(tong)流(liu)速(su)過低會(hui)(hui)使粉(fen)塵沉積堵塞管道(dao)。