戶外不銹鋼風管
尺寸計算
風管尺寸=風量/風速
風量(liang)=房間(jian)面積*房間(jian)高(gao)*換氣次數
例子:風(feng)量4萬(wan),風(feng)速9m/s,
得(de)風管(guan)尺寸=40000/9/3600=1.23平方
1.23=1.5*0.82
所以 風(feng)管尺寸為1500*800 。
管道直徑設計計算步驟:
1、繪制(zhi)通風或空調系統(tong)軸測圖,對各管(guan)段(duan)進行編號,標注(zhu)長(chang)(chang)度(du)(du)和風量。管(guan)段(duan)長(chang)(chang)度(du)(du)一(yi)般按(an)兩管(guan)件(jian)中心線長(chang)(chang)度(du)(du)計(ji)算(suan),不扣除管(guan)件(jian)(如三(san)通,彎(wan)頭)本(ben)身的長(chang)(chang)度(du)(du)。
2、確定合理(li)的空氣速流
風(feng)(feng)管(guan)(guan)(guan)內的空(kong)(kong)(kong)氣流速(su)對(dui)通風(feng)(feng)、空(kong)(kong)(kong)調(diao)系(xi)統(tong)的經濟型(xing)有較大(da)的影響。流速(su)高,風(feng)(feng)管(guan)(guan)(guan)斷面(mian)(mian)小,材料耗(hao)用少,建造費用小;但(dan)是系(xi)統(tong)的阻(zu)力(li)(li)大(da),動力(li)(li)消耗(hao)增(zeng)(zeng)(zeng)大(da),運用費用增(zeng)(zeng)(zeng)加(jia)。對(dui)除(chu)塵系(xi)統(tong)會增(zeng)(zeng)(zeng)加(jia)設備和管(guan)(guan)(guan)道(dao)的磨(mo)損(sun),對(dui)空(kong)(kong)(kong)調(diao)系(xi)統(tong)會增(zeng)(zeng)(zeng)加(jia)噪聲。流速(su)低,阻(zu)力(li)(li)小,動力(li)(li)消耗(hao)少;但(dan)是風(feng)(feng)管(guan)(guan)(guan)斷面(mian)(mian)大(da),材料和建造費用大(da),風(feng)(feng)管(guan)(guan)(guan)占用的空(kong)(kong)(kong)間(jian)也增(zeng)(zeng)(zeng)大(da)。對(dui)除(chu)塵系(xi)統(tong)流速(su)過低會使(shi)粉塵沉積(ji)堵塞(sai)管(guan)(guan)(guan)道(dao)。