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4萬,風速(su)9m/s,
得(de)風管尺寸=40000/9/3600=1.23平方
1.23=1.5*0.82
所以 風管尺寸為1500*800 。
管道直徑設計計算步驟:
1、繪制通風(feng)(feng)或空(kong)調系統(tong)軸測圖,對各管段進行編號,標(biao)注(zhu)長(chang)度(du)(du)和風(feng)(feng)量。管段長(chang)度(du)(du)一般按兩(liang)管件(jian)中(zhong)心線(xian)長(chang)度(du)(du)計算,不(bu)扣除管件(jian)(如三通,彎頭)本身的長(chang)度(du)(du)。
2、確定合(he)理的空氣速流
風(feng)管(guan)內(nei)的(de)(de)空(kong)(kong)氣流(liu)(liu)速(su)對通風(feng)、空(kong)(kong)調系(xi)統(tong)(tong)(tong)的(de)(de)經(jing)濟型有較大(da)的(de)(de)影響。流(liu)(liu)速(su)高,風(feng)管(guan)斷面(mian)小,材(cai)料(liao)(liao)耗用(yong)(yong)少,建造費(fei)用(yong)(yong)小;但(dan)是系(xi)統(tong)(tong)(tong)的(de)(de)阻力(li)(li)(li)大(da),動力(li)(li)(li)消(xiao)耗增(zeng)大(da),運用(yong)(yong)費(fei)用(yong)(yong)增(zeng)加(jia)。對除塵系(xi)統(tong)(tong)(tong)會(hui)增(zeng)加(jia)設(she)備和管(guan)道的(de)(de)磨損(sun),對空(kong)(kong)調系(xi)統(tong)(tong)(tong)會(hui)增(zeng)加(jia)噪聲。流(liu)(liu)速(su)低,阻力(li)(li)(li)小,動力(li)(li)(li)消(xiao)耗少;但(dan)是風(feng)管(guan)斷面(mian)大(da),材(cai)料(liao)(liao)和建造費(fei)用(yong)(yong)大(da),風(feng)管(guan)占用(yong)(yong)的(de)(de)空(kong)(kong)間也(ye)增(zeng)大(da)。對除塵系(xi)統(tong)(tong)(tong)流(liu)(liu)速(su)過(guo)低會(hui)使粉(fen)塵沉(chen)積堵塞管(guan)道。