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(ji)*房間高*換氣次數
例子:風(feng)量4萬,風(feng)速9m/s,
得風管尺(chi)寸(cun)=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、繪制通(tong)風或(huo)空調系統軸(zhou)測圖,對各管(guan)段進行編(bian)號,標注長度和風量(liang)。管(guan)段長度一(yi)般按兩管(guan)件(jian)(jian)中(zhong)心線長度計(ji)算,不扣除管(guan)件(jian)(jian)(如三通(tong),彎頭(tou))本身的長度。
2、確定合理(li)的空氣速(su)流(liu)
風管(guan)(guan)(guan)內的(de)空氣流速(su)(su)對通風、空調系統(tong)(tong)的(de)經濟(ji)型(xing)有(you)較大(da)(da)(da)的(de)影響。流速(su)(su)高,風管(guan)(guan)(guan)斷面(mian)小(xiao),材料(liao)耗(hao)用(yong)(yong)少,建造費用(yong)(yong)小(xiao);但是系統(tong)(tong)的(de)阻力大(da)(da)(da),動(dong)力消耗(hao)增(zeng)(zeng)大(da)(da)(da),運用(yong)(yong)費用(yong)(yong)增(zeng)(zeng)加。對除(chu)塵系統(tong)(tong)會(hui)增(zeng)(zeng)加設備(bei)和管(guan)(guan)(guan)道的(de)磨損,對空調系統(tong)(tong)會(hui)增(zeng)(zeng)加噪聲。流速(su)(su)低,阻力小(xiao),動(dong)力消耗(hao)少;但是風管(guan)(guan)(guan)斷面(mian)大(da)(da)(da),材料(liao)和建造費用(yong)(yong)大(da)(da)(da),風管(guan)(guan)(guan)占用(yong)(yong)的(de)空間也(ye)增(zeng)(zeng)大(da)(da)(da)。對除(chu)塵系統(tong)(tong)流速(su)(su)過(guo)低會(hui)使(shi)粉塵沉積(ji)堵(du)塞(sai)管(guan)(guan)(guan)道。