戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房(fang)間(jian)面積*房(fang)間(jian)高(gao)*換氣次數

        ;例子:風量4萬，風速9m/s，

        得風管尺(chi)寸=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、繪制通風或空調(diao)系統(tong)軸測圖，對各(ge)管段進行編號(hao)，標(biao)注長度和風量。管段長度一般按(an)兩(liang)管件(jian)中(zhong)心線長度計算，不扣除管件(jian)（如三通，彎頭）本身的長度。

        2、確定合理的空氣(qi)速(su)流

        風(feng)管(guan)(guan)內的空(kong)氣流速對通風(feng)、空(kong)調(diao)系(xi)統(tong)(tong)的經(jing)濟型(xing)有較大的影響。流速高，風(feng)管(guan)(guan)斷面(mian)(mian)小，材料耗(hao)用(yong)少，建(jian)造(zao)費(fei)用(yong)小；但是系(xi)統(tong)(tong)的阻力大，動(dong)(dong)力消耗(hao)增(zeng)(zeng)大，運用(yong)費(fei)用(yong)增(zeng)(zeng)加。對除塵系(xi)統(tong)(tong)會(hui)增(zeng)(zeng)加設(she)備和管(guan)(guan)道的磨損，對空(kong)調(diao)系(xi)統(tong)(tong)會(hui)增(zeng)(zeng)加噪聲。流速低，阻力小，動(dong)(dong)力消耗(hao)少；但是風(feng)管(guan)(guan)斷面(mian)(mian)大，材料和建(jian)造(zao)費(fei)用(yong)大，風(feng)管(guan)(guan)占用(yong)的空(kong)間也(ye)增(zeng)(zeng)大。對除塵系(xi)統(tong)(tong)流速過低會(hui)使粉塵沉(chen)積(ji)堵塞管(guan)(guan)道。