戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

   ;     風量=房間(jian)(jian)面積*房間(jian)(jian)高*換氣次數

        例子:風(feng)(feng)量4萬，風(feng)(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 風管(guan)尺寸(cun)為1500*800 。

管道直徑設計計算步驟：

        1、繪制通風或空(kong)調(diao)系(xi)統軸測圖，對各管(guan)(guan)(guan)段進行編號，標注長度和風量。管(guan)(guan)(guan)段長度一般按兩(liang)管(guan)(guan)(guan)件中(zhong)心線長度計(ji)算，不(bu)扣除管(guan)(guan)(guan)件（如(ru)三通，彎頭）本身的長度。

      ;  2、確定合理(li)的空氣速(su)流

        風管(guan)(guan)(guan)內的(de)(de)空氣(qi)流(liu)(liu)速對(dui)(dui)(dui)通風、空調(diao)系(xi)統(tong)(tong)的(de)(de)經濟型有較(jiao)大(da)(da)(da)的(de)(de)影響。流(liu)(liu)速高，風管(guan)(guan)(guan)斷(duan)面小，材料(liao)耗用(yong)(yong)(yong)少，建造費用(yong)(yong)(yong)小；但是系(xi)統(tong)(tong)的(de)(de)阻力(li)(li)大(da)(da)(da)，動力(li)(li)消耗增(zeng)(zeng)大(da)(da)(da)，運(yun)用(yong)(yong)(yong)費用(yong)(yong)(yong)增(zeng)(zeng)加。對(dui)(dui)(dui)除(chu)塵(chen)系(xi)統(tong)(tong)會(hui)增(zeng)(zeng)加設備(bei)和管(guan)(guan)(guan)道的(de)(de)磨損，對(dui)(dui)(dui)空調(diao)系(xi)統(tong)(tong)會(hui)增(zeng)(zeng)加噪聲。流(liu)(liu)速低，阻力(li)(li)小，動力(li)(li)消耗少；但是風管(guan)(guan)(guan)斷(duan)面大(da)(da)(da)，材料(liao)和建造費用(yong)(yong)(yong)大(da)(da)(da)，風管(guan)(guan)(guan)占用(yong)(yong)(yong)的(de)(de)空間也(ye)增(zeng)(zeng)大(da)(da)(da)。對(dui)(dui)(dui)除(chu)塵(chen)系(xi)統(tong)(tong)流(liu)(liu)速過低會(hui)使粉(fen)塵(chen)沉(chen)積堵塞(sai)管(guan)(guan)(guan)道。