戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房(fang)間(jian)面積*房(fang)間(jian)高(gao)*換氣(qi)次數

  ;      例子:風(feng)量4萬(wan)，風(feng)速9m/s，

        得風管尺(chi)寸=40000/9/3600=1.23平方

        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(tong)風或空調系統軸測圖(tu)，對各管段(duan)進行(xing)編號，標注長度(du)和風量。管段(duan)長度(du)一(yi)般(ban)按兩管件中心線長度(du)計算，不扣(kou)除管件（如三(san)通(tong)，彎頭(tou)）本身(shen)的長度(du)。

        2、確定合理的空氣速流

        風(feng)管(guan)(guan)(guan)內的空(kong)(kong)氣流(liu)速(su)對(dui)通風(feng)、空(kong)(kong)調系統(tong)(tong)的經濟型有較大的影響。流(liu)速(su)高，風(feng)管(guan)(guan)(guan)斷(duan)面小，材料(liao)耗用(yong)(yong)(yong)(yong)少，建造費用(yong)(yong)(yong)(yong)小；但是系統(tong)(tong)的阻(zu)力(li)大，動力(li)消(xiao)耗增(zeng)(zeng)大，運用(yong)(yong)(yong)(yong)費用(yong)(yong)(yong)(yong)增(zeng)(zeng)加。對(dui)除塵(chen)系統(tong)(tong)會(hui)增(zeng)(zeng)加設備和(he)(he)管(guan)(guan)(guan)道(dao)的磨損，對(dui)空(kong)(kong)調系統(tong)(tong)會(hui)增(zeng)(zeng)加噪聲。流(liu)速(su)低(di)，阻(zu)力(li)小，動力(li)消(xiao)耗少；但是風(feng)管(guan)(guan)(guan)斷(duan)面大，材料(liao)和(he)(he)建造費用(yong)(yong)(yong)(yong)大，風(feng)管(guan)(guan)(guan)占用(yong)(yong)(yong)(yong)的空(kong)(kong)間也增(zeng)(zeng)大。對(dui)除塵(chen)系統(tong)(tong)流(liu)速(su)過(guo)低(di)會(hui)使粉(fen)塵(chen)沉積堵塞管(guan)(guan)(guan)道(dao)。