戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房間面積*房間高*換氣次數

        例子:風量(liang)4萬，風速9m/s，

        得風(feng)管尺寸=40000/9/3600=1.23平方

      ;  1.23=1.5*0.82

        所以 風管尺寸(cun)為1500*800 。

管道直徑設計計算步驟：

        1、繪制通風或空調系統(tong)軸測圖，對各管(guan)(guan)段進行(xing)編(bian)號(hao)，標注長(chang)(chang)度和風量。管(guan)(guan)段長(chang)(chang)度一般按兩管(guan)(guan)件(jian)中心線長(chang)(chang)度計算，不扣(kou)除(chu)管(guan)(guan)件(jian)（如三通，彎(wan)頭(tou)）本身(shen)的長(chang)(chang)度。

        2、確(que)定合理的(de)空氣速流

        風管(guan)內的(de)空(kong)氣流速(su)(su)對(dui)(dui)通風、空(kong)調系(xi)統(tong)(tong)(tong)的(de)經濟型有(you)較(jiao)大(da)(da)的(de)影響。流速(su)(su)高，風管(guan)斷面(mian)小，材料耗用(yong)(yong)(yong)少，建(jian)造(zao)費(fei)用(yong)(yong)(yong)小；但(dan)是(shi)系(xi)統(tong)(tong)(tong)的(de)阻(zu)力大(da)(da)，動(dong)力消(xiao)耗增(zeng)(zeng)大(da)(da)，運用(yong)(yong)(yong)費(fei)用(yong)(yong)(yong)增(zeng)(zeng)加。對(dui)(dui)除(chu)塵系(xi)統(tong)(tong)(tong)會(hui)增(zeng)(zeng)加設(she)備和管(guan)道的(de)磨損，對(dui)(dui)空(kong)調系(xi)統(tong)(tong)(tong)會(hui)增(zeng)(zeng)加噪聲。流速(su)(su)低，阻(zu)力小，動(dong)力消(xiao)耗少；但(dan)是(shi)風管(guan)斷面(mian)大(da)(da)，材料和建(jian)造(zao)費(fei)用(yong)(yong)(yong)大(da)(da)，風管(guan)占用(yong)(yong)(yong)的(de)空(kong)間也增(zeng)(zeng)大(da)(da)。對(dui)(dui)除(chu)塵系(xi)統(tong)(tong)(tong)流速(su)(su)過低會(hui)使粉塵沉積(ji)堵塞管(guan)道。