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(gao)*換氣次數
例子:風量4萬,風速(su)9m/s,
得風管尺寸=40000/9/3600=1.23平方
1.23=1.5*0.82
所以(yi) 風(feng)管尺(chi)寸為1500*800 。
管道直徑設計計算步驟:
1、繪(hui)制通風或空調系(xi)統(tong)軸測圖,對(dui)各管段進(jin)行編號,標注長(chang)(chang)(chang)度和風量。管段長(chang)(chang)(chang)度一般(ban)按(an)兩(liang)管件中心線長(chang)(chang)(chang)度計(ji)算,不扣(kou)除管件(如三(san)通,彎頭)本身的長(chang)(chang)(chang)度。
2、確定(ding)合(he)理的空氣速流
風(feng)(feng)管(guan)(guan)內的空(kong)氣流速對(dui)(dui)(dui)通風(feng)(feng)、空(kong)調系(xi)統的經濟型(xing)有較大(da)(da)的影響。流速高(gao),風(feng)(feng)管(guan)(guan)斷面(mian)小(xiao)(xiao),材(cai)料耗(hao)用(yong)(yong)少,建造(zao)費(fei)用(yong)(yong)小(xiao)(xiao);但是(shi)系(xi)統的阻(zu)力大(da)(da),動(dong)力消(xiao)耗(hao)增(zeng)(zeng)大(da)(da),運用(yong)(yong)費(fei)用(yong)(yong)增(zeng)(zeng)加。對(dui)(dui)(dui)除(chu)塵(chen)(chen)系(xi)統會(hui)(hui)增(zeng)(zeng)加設備和(he)管(guan)(guan)道(dao)(dao)的磨損,對(dui)(dui)(dui)空(kong)調系(xi)統會(hui)(hui)增(zeng)(zeng)加噪聲(sheng)。流速低(di),阻(zu)力小(xiao)(xiao),動(dong)力消(xiao)耗(hao)少;但是(shi)風(feng)(feng)管(guan)(guan)斷面(mian)大(da)(da),材(cai)料和(he)建造(zao)費(fei)用(yong)(yong)大(da)(da),風(feng)(feng)管(guan)(guan)占用(yong)(yong)的空(kong)間也增(zeng)(zeng)大(da)(da)。對(dui)(dui)(dui)除(chu)塵(chen)(chen)系(xi)統流速過低(di)會(hui)(hui)使粉塵(chen)(chen)沉積堵(du)塞管(guan)(guan)道(dao)(dao)。