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(qi)次(ci)數
例子:風量(liang)4萬,風速9m/s,
得風管(guan)尺寸(cun)=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(zhi)通(tong)(tong)風或空調系統軸(zhou)測圖,對各管(guan)(guan)段進行編號,標注長(chang)度(du)和(he)風量。管(guan)(guan)段長(chang)度(du)一般按兩(liang)管(guan)(guan)件(jian)中(zhong)心線(xian)長(chang)度(du)計算,不扣除管(guan)(guan)件(jian)(如三通(tong)(tong),彎頭)本身的長(chang)度(du)。
2、確定合(he)理的(de)空氣(qi)速流
風管(guan)(guan)內的空(kong)氣流(liu)(liu)速(su)(su)對通(tong)風、空(kong)調系(xi)統(tong)的經濟型有較大的影響。流(liu)(liu)速(su)(su)高,風管(guan)(guan)斷面小(xiao),材料耗用(yong)(yong)少,建(jian)造(zao)費(fei)用(yong)(yong)小(xiao);但(dan)是系(xi)統(tong)的阻力大,動力消(xiao)耗增大,運用(yong)(yong)費(fei)用(yong)(yong)增加。對除塵系(xi)統(tong)會(hui)增加設備和(he)管(guan)(guan)道(dao)的磨損,對空(kong)調系(xi)統(tong)會(hui)增加噪聲(sheng)。流(liu)(liu)速(su)(su)低(di),阻力小(xiao),動力消(xiao)耗少;但(dan)是風管(guan)(guan)斷面大,材料和(he)建(jian)造(zao)費(fei)用(yong)(yong)大,風管(guan)(guan)占用(yong)(yong)的空(kong)間也增大。對除塵系(xi)統(tong)流(liu)(liu)速(su)(su)過(guo)低(di)會(hui)使粉塵沉(chen)積堵塞管(guan)(guan)道(dao)。