戶外不銹鋼風管
尺寸計算
風管尺寸=風量/風速
風量=房(fang)間面積*房(fang)間高*換氣次數
例子:風量4萬,風速9m/s,
得風管尺寸=40000/9/3600=1.23平方
1.23=1.5*0.82
所以 風管尺(chi)寸為1500*800 。
管道直徑設計計算步驟:
1、繪(hui)制通(tong)風(feng)或空調系統軸測(ce)圖,對各管(guan)段(duan)進行(xing)編號(hao),標(biao)注長(chang)度和風(feng)量。管(guan)段(duan)長(chang)度一般按兩管(guan)件(jian)中心線長(chang)度計算(suan),不扣除(chu)管(guan)件(jian)(如三(san)通(tong),彎(wan)頭(tou))本(ben)身(shen)的長(chang)度。
2、確定合理的空(kong)氣速流(liu)
風(feng)管(guan)(guan)內的(de)空氣流速(su)(su)對(dui)通風(feng)、空調(diao)(diao)系(xi)統(tong)的(de)經濟型(xing)有較大的(de)影響。流速(su)(su)高,風(feng)管(guan)(guan)斷面小(xiao),材(cai)料耗(hao)用(yong)(yong)(yong)少,建造(zao)費(fei)用(yong)(yong)(yong)小(xiao);但是系(xi)統(tong)的(de)阻力大,動力消(xiao)耗(hao)增(zeng)(zeng)(zeng)大,運用(yong)(yong)(yong)費(fei)用(yong)(yong)(yong)增(zeng)(zeng)(zeng)加。對(dui)除塵系(xi)統(tong)會增(zeng)(zeng)(zeng)加設備和管(guan)(guan)道(dao)的(de)磨損,對(dui)空調(diao)(diao)系(xi)統(tong)會增(zeng)(zeng)(zeng)加噪聲。流速(su)(su)低(di),阻力小(xiao),動力消(xiao)耗(hao)少;但是風(feng)管(guan)(guan)斷面大,材(cai)料和建造(zao)費(fei)用(yong)(yong)(yong)大,風(feng)管(guan)(guan)占用(yong)(yong)(yong)的(de)空間也增(zeng)(zeng)(zeng)大。對(dui)除塵系(xi)統(tong)流速(su)(su)過低(di)會使粉塵沉積堵塞管(guan)(guan)道(dao)。