戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房間(jian)(jian)面積*房間(jian)(jian)高(gao)*換氣(qi)次數(shu)

 ;       例子:風(feng)量(liang)4萬，風(feng)速9m/s，

        得風管尺寸=40000/9/3600=1.23平方

        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、繪制通風或空調系統軸測圖，對各管(guan)段(duan)進行編號，標注長(chang)度和(he)風量。管(guan)段(duan)長(chang)度一(yi)般按(an)兩管(guan)件(jian)中心(xin)線長(chang)度計算，不扣除管(guan)件(jian)（如(ru)三(san)通，彎(wan)頭）本身的長(chang)度。

        2、確定(ding)合理的空(kong)氣速流

        風(feng)管(guan)內的(de)(de)(de)空(kong)氣流速(su)(su)對通風(feng)、空(kong)調系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)經濟型有(you)較大的(de)(de)(de)影響。流速(su)(su)高(gao)，風(feng)管(guan)斷面(mian)小(xiao)，材料耗用(yong)少，建造(zao)費用(yong)小(xiao)；但(dan)(dan)是系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)阻(zu)力大，動力消(xiao)耗增(zeng)大，運用(yong)費用(yong)增(zeng)加(jia)。對除塵(chen)(chen)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)會增(zeng)加(jia)設備和(he)管(guan)道(dao)的(de)(de)(de)磨損，對空(kong)調系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)會增(zeng)加(jia)噪聲。流速(su)(su)低(di)，阻(zu)力小(xiao)，動力消(xiao)耗少；但(dan)(dan)是風(feng)管(guan)斷面(mian)大，材料和(he)建造(zao)費用(yong)大，風(feng)管(guan)占用(yong)的(de)(de)(de)空(kong)間也增(zeng)大。對除塵(chen)(chen)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)流速(su)(su)過低(di)會使(shi)粉塵(chen)(chen)沉積堵塞管(guan)道(dao)。