戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風(feng)量(liang)=房間(jian)(jian)面積*房間(jian)(jian)高*換氣(qi)次數

        例子:風量4萬，風速9m/s，

        得風(feng)管(guan)尺寸(cun)=40000/9/3600=1.23平方(fang)

        1.23=1.5*0.82

        所以 風(feng)管尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪(hui)制通風或空(kong)調(diao)系統軸測圖，對(dui)各管段進(jin)行編號，標注(zhu)長度(du)和風量。管段長度(du)一般按(an)兩管件中心(xin)線長度(du)計算，不(bu)扣除(chu)管件（如三通，彎頭）本身(shen)的長度(du)。

        2、確定合理的(de)空氣速流

        風(feng)(feng)(feng)管內的(de)空(kong)(kong)(kong)氣(qi)流速(su)對(dui)通風(feng)(feng)(feng)、空(kong)(kong)(kong)調系(xi)(xi)統(tong)的(de)經濟型(xing)有(you)較(jiao)大(da)的(de)影響。流速(su)高，風(feng)(feng)(feng)管斷面小，材料耗用(yong)(yong)(yong)少，建造(zao)(zao)費(fei)(fei)用(yong)(yong)(yong)小；但(dan)(dan)是系(xi)(xi)統(tong)的(de)阻力(li)大(da)，動(dong)力(li)消(xiao)耗增(zeng)大(da)，運(yun)用(yong)(yong)(yong)費(fei)(fei)用(yong)(yong)(yong)增(zeng)加。對(dui)除(chu)塵(chen)系(xi)(xi)統(tong)會增(zeng)加設備和管道的(de)磨損，對(dui)空(kong)(kong)(kong)調系(xi)(xi)統(tong)會增(zeng)加噪聲。流速(su)低，阻力(li)小，動(dong)力(li)消(xiao)耗少；但(dan)(dan)是風(feng)(feng)(feng)管斷面大(da)，材料和建造(zao)(zao)費(fei)(fei)用(yong)(yong)(yong)大(da)，風(feng)(feng)(feng)管占用(yong)(yong)(yong)的(de)空(kong)(kong)(kong)間(jian)也增(zeng)大(da)。對(dui)除(chu)塵(chen)系(xi)(xi)統(tong)流速(su)過低會使(shi)粉塵(chen)沉(chen)積(ji)堵塞管道。