戶外不銹鋼風管

尺寸計算

        風管尺寸=風量/風速

        風量=房間面積*房間高*換氣次數

        例(li)子:風量(liang)4萬，風速(su)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)管尺寸為(wei)1500*800 。

管道直徑設計計算步驟：

        1、繪制通風(feng)或(huo)空調系統(tong)軸測圖，對各管(guan)段進行編(bian)號，標注長度(du)和風(feng)量。管(guan)段長度(du)一般(ban)按兩管(guan)件中心線長度(du)計算，不扣除管(guan)件（如三通，彎頭）本身的長度(du)。

     ;   2、確(que)定合理的空氣速流

        風(feng)(feng)管內的空(kong)氣流(liu)速對通(tong)風(feng)(feng)、空(kong)調(diao)系統(tong)(tong)(tong)的經(jing)濟型(xing)有較大的影響。流(liu)速高(gao)，風(feng)(feng)管斷面(mian)(mian)小(xiao)，材(cai)料耗(hao)用(yong)(yong)(yong)少(shao)，建造費用(yong)(yong)(yong)小(xiao)；但是系統(tong)(tong)(tong)的阻(zu)力(li)大，動力(li)消耗(hao)增大，運用(yong)(yong)(yong)費用(yong)(yong)(yong)增加。對除塵系統(tong)(tong)(tong)會(hui)增加設(she)備和管道的磨損，對空(kong)調(diao)系統(tong)(tong)(tong)會(hui)增加噪聲。流(liu)速低，阻(zu)力(li)小(xiao)，動力(li)消耗(hao)少(shao)；但是風(feng)(feng)管斷面(mian)(mian)大，材(cai)料和建造費用(yong)(yong)(yong)大，風(feng)(feng)管占(zhan)用(yong)(yong)(yong)的空(kong)間也(ye)增大。對除塵系統(tong)(tong)(tong)流(liu)速過低會(hui)使(shi)粉塵沉積(ji)堵塞管道。