戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房(fang)間面(mian)積*房(fang)間高(gao)*換氣(qi)次數(shu)

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

     ;   得(de)風管(guan)尺(chi)寸=40000/9/3600=1.23平方

  ;      1.23=1.5*0.82

        所以 風管(guan)尺寸為(wei)1500*800 。

管道直徑設計計算步驟：

        1、繪制通風(feng)或(huo)空調系統(tong)軸測(ce)圖(tu)，對各管(guan)段進行編號，標注(zhu)長(chang)(chang)度(du)(du)和(he)風(feng)量。管(guan)段長(chang)(chang)度(du)(du)一般按兩管(guan)件(jian)中(zhong)心線長(chang)(chang)度(du)(du)計算，不扣(kou)除管(guan)件(jian)（如(ru)三通，彎(wan)頭）本身的長(chang)(chang)度(du)(du)。

        2、確定合理的空氣速流

        風(feng)(feng)管內的空(kong)(kong)氣流(liu)速(su)(su)對(dui)通風(feng)(feng)、空(kong)(kong)調系(xi)統(tong)(tong)的經濟型有較大(da)的影響。流(liu)速(su)(su)高，風(feng)(feng)管斷面小，材料耗(hao)用(yong)(yong)少(shao)(shao)，建(jian)造(zao)(zao)費(fei)用(yong)(yong)小；但(dan)是(shi)系(xi)統(tong)(tong)的阻力(li)大(da)，動(dong)力(li)消耗(hao)增(zeng)(zeng)大(da)，運用(yong)(yong)費(fei)用(yong)(yong)增(zeng)(zeng)加。對(dui)除塵系(xi)統(tong)(tong)會(hui)增(zeng)(zeng)加設備和管道(dao)的磨損，對(dui)空(kong)(kong)調系(xi)統(tong)(tong)會(hui)增(zeng)(zeng)加噪聲。流(liu)速(su)(su)低，阻力(li)小，動(dong)力(li)消耗(hao)少(shao)(shao)；但(dan)是(shi)風(feng)(feng)管斷面大(da)，材料和建(jian)造(zao)(zao)費(fei)用(yong)(yong)大(da)，風(feng)(feng)管占用(yong)(yong)的空(kong)(kong)間也增(zeng)(zeng)大(da)。對(dui)除塵系(xi)統(tong)(tong)流(liu)速(su)(su)過低會(hui)使(shi)粉(fen)塵沉積堵塞(sai)管道(dao)。