戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房(fang)(fang)間面積*房(fang)(fang)間高*換(huan)氣次數

        例子:風量(liang)4萬，風速9m/s，

        得風管尺寸=40000/9/3600=1.23平方

 ;       1.23=1.5*0.82

        所(suo)以(yi) 風(feng)管尺寸(cun)為1500*800 。

管道直徑設計計算步驟：

        1、繪制通(tong)(tong)風或空調系統軸測(ce)圖，對(dui)各管段(duan)進行編號，標注長度(du)和風量。管段(duan)長度(du)一般按兩(liang)管件中心線長度(du)計算，不扣除管件（如(ru)三通(tong)(tong)，彎頭）本身的長度(du)。

        2、確定合理的空氣速流

        風管(guan)(guan)內的(de)空(kong)(kong)(kong)氣流速(su)對通風、空(kong)(kong)(kong)調(diao)系統(tong)(tong)(tong)的(de)經濟型有較大(da)(da)的(de)影響。流速(su)高(gao)，風管(guan)(guan)斷面小，材(cai)料(liao)耗用(yong)少，建(jian)造(zao)(zao)費用(yong)小；但(dan)是(shi)系統(tong)(tong)(tong)的(de)阻(zu)力大(da)(da)，動力消(xiao)耗增(zeng)大(da)(da)，運用(yong)費用(yong)增(zeng)加(jia)。對除(chu)塵(chen)系統(tong)(tong)(tong)會(hui)增(zeng)加(jia)設備(bei)和管(guan)(guan)道的(de)磨損，對空(kong)(kong)(kong)調(diao)系統(tong)(tong)(tong)會(hui)增(zeng)加(jia)噪聲。流速(su)低，阻(zu)力小，動力消(xiao)耗少；但(dan)是(shi)風管(guan)(guan)斷面大(da)(da)，材(cai)料(liao)和建(jian)造(zao)(zao)費用(yong)大(da)(da)，風管(guan)(guan)占用(yong)的(de)空(kong)(kong)(kong)間也增(zeng)大(da)(da)。對除(chu)塵(chen)系統(tong)(tong)(tong)流速(su)過低會(hui)使粉塵(chen)沉積堵塞管(guan)(guan)道。