戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房(fang)(fang)間(jian)面(mian)積*房(fang)(fang)間(jian)高*換氣次數

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

        得(de)風管(guan)尺寸=40000/9/3600=1.23平方

        1.23=1.5*0.82

        所(suo)以 風管尺寸為(wei)1500*800 。

管道直徑設計計算步驟：

        1、繪制通風(feng)(feng)或空(kong)調(diao)系統軸測圖，對各管段進(jin)行編號，標注(zhu)長(chang)度(du)和風(feng)(feng)量(liang)。管段長(chang)度(du)一般(ban)按兩管件中心線長(chang)度(du)計(ji)算，不(bu)扣除管件（如(ru)三(san)通，彎(wan)頭）本身的長(chang)度(du)。

        2、確定合(he)理(li)的空氣速流

        風(feng)(feng)管(guan)(guan)(guan)(guan)內的(de)空(kong)氣流速對(dui)通(tong)風(feng)(feng)、空(kong)調(diao)系統(tong)(tong)(tong)的(de)經濟型(xing)有較大(da)(da)的(de)影響。流速高，風(feng)(feng)管(guan)(guan)(guan)(guan)斷面(mian)小，材料(liao)耗(hao)用(yong)(yong)(yong)少(shao)，建(jian)造費(fei)用(yong)(yong)(yong)小；但(dan)是(shi)系統(tong)(tong)(tong)的(de)阻(zu)力大(da)(da)，動力消(xiao)耗(hao)增(zeng)大(da)(da)，運(yun)用(yong)(yong)(yong)費(fei)用(yong)(yong)(yong)增(zeng)加。對(dui)除塵系統(tong)(tong)(tong)會增(zeng)加設備和(he)管(guan)(guan)(guan)(guan)道的(de)磨損，對(dui)空(kong)調(diao)系統(tong)(tong)(tong)會增(zeng)加噪聲。流速低(di)，阻(zu)力小，動力消(xiao)耗(hao)少(shao)；但(dan)是(shi)風(feng)(feng)管(guan)(guan)(guan)(guan)斷面(mian)大(da)(da)，材料(liao)和(he)建(jian)造費(fei)用(yong)(yong)(yong)大(da)(da)，風(feng)(feng)管(guan)(guan)(guan)(guan)占用(yong)(yong)(yong)的(de)空(kong)間也(ye)增(zeng)大(da)(da)。對(dui)除塵系統(tong)(tong)(tong)流速過低(di)會使粉塵沉積堵塞管(guan)(guan)(guan)(guan)道。