戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

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

        例子:風量4萬，風速9m/s，

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

        1.23=1.5*0.82

        所以(yi) 風管尺寸(cun)為(wei)1500*800 。

管道直徑設計計算步驟：

        1、繪制通(tong)風(feng)或空調系(xi)統軸(zhou)測圖，對(dui)各管(guan)段進(jin)行(xing)編號，標(biao)注長度(du)(du)和風(feng)量。管(guan)段長度(du)(du)一般按兩管(guan)件中心線長度(du)(du)計算，不扣除管(guan)件（如三通(tong)，彎頭）本身的長度(du)(du)。

        2、確定(ding)合(he)理的空(kong)氣速流

        風(feng)(feng)管(guan)(guan)(guan)(guan)內的空氣(qi)流(liu)(liu)速(su)對(dui)(dui)通(tong)風(feng)(feng)、空調系(xi)(xi)統(tong)(tong)的經濟型(xing)有(you)較大(da)(da)(da)(da)的影響。流(liu)(liu)速(su)高，風(feng)(feng)管(guan)(guan)(guan)(guan)斷面小(xiao)，材料耗用(yong)少，建(jian)造費(fei)用(yong)小(xiao)；但(dan)是系(xi)(xi)統(tong)(tong)的阻(zu)力(li)(li)大(da)(da)(da)(da)，動力(li)(li)消耗增大(da)(da)(da)(da)，運用(yong)費(fei)用(yong)增加。對(dui)(dui)除塵(chen)(chen)(chen)系(xi)(xi)統(tong)(tong)會(hui)(hui)增加設備和管(guan)(guan)(guan)(guan)道的磨損，對(dui)(dui)空調系(xi)(xi)統(tong)(tong)會(hui)(hui)增加噪聲。流(liu)(liu)速(su)低，阻(zu)力(li)(li)小(xiao)，動力(li)(li)消耗少；但(dan)是風(feng)(feng)管(guan)(guan)(guan)(guan)斷面大(da)(da)(da)(da)，材料和建(jian)造費(fei)用(yong)大(da)(da)(da)(da)，風(feng)(feng)管(guan)(guan)(guan)(guan)占(zhan)用(yong)的空間也(ye)增大(da)(da)(da)(da)。對(dui)(dui)除塵(chen)(chen)(chen)系(xi)(xi)統(tong)(tong)流(liu)(liu)速(su)過(guo)低會(hui)(hui)使粉塵(chen)(chen)(chen)沉積堵(du)塞管(guan)(guan)(guan)(guan)道。