戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量(liang)=房間面積*房間高*換氣(qi)次數

        例子:風量4萬，風速9m/s，

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

        1.23=1.5*0.82

        所以(yi) 風管尺寸為(wei)1500*800 。

管道直徑設計計算步驟：

        1、繪制(zhi)通風或(huo)空(kong)調(diao)系統軸測(ce)圖(tu)，對各(ge)管(guan)(guan)段進行(xing)編號(hao)，標注(zhu)長(chang)度(du)和風量。管(guan)(guan)段長(chang)度(du)一般按兩管(guan)(guan)件中心(xin)線長(chang)度(du)計算，不(bu)扣除管(guan)(guan)件（如三(san)通，彎頭）本身的長(chang)度(du)。

        2、確(que)定合理的空(kong)氣速流

        風(feng)管(guan)(guan)內的空(kong)(kong)氣流(liu)速對通(tong)風(feng)、空(kong)(kong)調(diao)系統的經濟型有較(jiao)大(da)(da)的影響。流(liu)速高，風(feng)管(guan)(guan)斷面小，材料(liao)耗用(yong)(yong)(yong)(yong)少(shao)，建(jian)造(zao)費用(yong)(yong)(yong)(yong)小；但(dan)是系統的阻力大(da)(da)，動(dong)(dong)力消耗增(zeng)(zeng)大(da)(da)，運用(yong)(yong)(yong)(yong)費用(yong)(yong)(yong)(yong)增(zeng)(zeng)加(jia)(jia)。對除(chu)塵(chen)系統會增(zeng)(zeng)加(jia)(jia)設備和管(guan)(guan)道的磨損，對空(kong)(kong)調(diao)系統會增(zeng)(zeng)加(jia)(jia)噪聲。流(liu)速低，阻力小，動(dong)(dong)力消耗少(shao)；但(dan)是風(feng)管(guan)(guan)斷面大(da)(da)，材料(liao)和建(jian)造(zao)費用(yong)(yong)(yong)(yong)大(da)(da)，風(feng)管(guan)(guan)占用(yong)(yong)(yong)(yong)的空(kong)(kong)間也(ye)增(zeng)(zeng)大(da)(da)。對除(chu)塵(chen)系統流(liu)速過低會使(shi)粉塵(chen)沉積(ji)堵塞(sai)管(guan)(guan)道。