戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風(feng)量=房間面積*房間高*換(huan)氣次數

        例子:風(feng)量4萬，風(feng)速9m/s，

        得(de)風管尺寸=40000/9/3600=1.23平(ping)方

        1.23=1.5*0.82

        所以 風管(guan)尺寸為(wei)1500*800 。

管道直徑設計計算步驟：

        1、繪(hui)制通(tong)風或空調(diao)系(xi)統軸測圖，對各管(guan)(guan)段(duan)進(jin)行編(bian)號，標注長(chang)度(du)(du)(du)和風量。管(guan)(guan)段(duan)長(chang)度(du)(du)(du)一般按兩管(guan)(guan)件中心線長(chang)度(du)(du)(du)計算(suan)，不扣(kou)除管(guan)(guan)件（如三通(tong)，彎頭(tou)）本(ben)身的(de)長(chang)度(du)(du)(du)。

        2、確(que)定合理(li)的空氣速(su)流

        風管(guan)內(nei)的(de)(de)空(kong)氣流速(su)對(dui)通(tong)風、空(kong)調系(xi)(xi)統(tong)(tong)(tong)的(de)(de)經濟型有較大的(de)(de)影響。流速(su)高，風管(guan)斷(duan)面小(xiao)(xiao)，材(cai)料(liao)耗用(yong)少，建造(zao)費用(yong)小(xiao)(xiao)；但(dan)是(shi)系(xi)(xi)統(tong)(tong)(tong)的(de)(de)阻力大，動力消(xiao)耗增(zeng)(zeng)(zeng)大，運用(yong)費用(yong)增(zeng)(zeng)(zeng)加(jia)。對(dui)除(chu)塵系(xi)(xi)統(tong)(tong)(tong)會增(zeng)(zeng)(zeng)加(jia)設備和管(guan)道的(de)(de)磨損，對(dui)空(kong)調系(xi)(xi)統(tong)(tong)(tong)會增(zeng)(zeng)(zeng)加(jia)噪(zao)聲(sheng)。流速(su)低(di)，阻力小(xiao)(xiao)，動力消(xiao)耗少；但(dan)是(shi)風管(guan)斷(duan)面大，材(cai)料(liao)和建造(zao)費用(yong)大，風管(guan)占用(yong)的(de)(de)空(kong)間也增(zeng)(zeng)(zeng)大。對(dui)除(chu)塵系(xi)(xi)統(tong)(tong)(tong)流速(su)過低(di)會使粉塵沉(chen)積堵塞管(guan)道。