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:風量4萬,風速9m/s,
得風管尺寸=40000/9/3600=1.23平方(fang)
1.23=1.5*0.82
所(suo)以 風管尺寸為1500*800 。
管道直徑設計計算步驟:
1、繪制通風或空調(diao)系統軸測圖,對(dui)各(ge)管段進(jin)行編號,標注長(chang)(chang)度和風量。管段長(chang)(chang)度一(yi)般按兩管件(jian)中心線長(chang)(chang)度計算,不扣除(chu)管件(jian)(如三(san)通,彎頭(tou))本(ben)身(shen)的長(chang)(chang)度。
2、確定(ding)合理的空氣速流
風管(guan)(guan)內的(de)空氣流速(su)(su)對(dui)通風、空調(diao)系(xi)統(tong)(tong)(tong)的(de)經濟型(xing)有較大(da)的(de)影(ying)響。流速(su)(su)高,風管(guan)(guan)斷面小(xiao)(xiao),材料耗用(yong)少(shao),建(jian)造(zao)費用(yong)小(xiao)(xiao);但是(shi)系(xi)統(tong)(tong)(tong)的(de)阻(zu)力(li)(li)大(da),動(dong)力(li)(li)消耗增(zeng)(zeng)(zeng)大(da),運用(yong)費用(yong)增(zeng)(zeng)(zeng)加。對(dui)除塵(chen)系(xi)統(tong)(tong)(tong)會增(zeng)(zeng)(zeng)加設備(bei)和(he)管(guan)(guan)道的(de)磨損,對(dui)空調(diao)系(xi)統(tong)(tong)(tong)會增(zeng)(zeng)(zeng)加噪聲。流速(su)(su)低,阻(zu)力(li)(li)小(xiao)(xiao),動(dong)力(li)(li)消耗少(shao);但是(shi)風管(guan)(guan)斷面大(da),材料和(he)建(jian)造(zao)費用(yong)大(da),風管(guan)(guan)占用(yong)的(de)空間也增(zeng)(zeng)(zeng)大(da)。對(dui)除塵(chen)系(xi)統(tong)(tong)(tong)流速(su)(su)過低會使粉塵(chen)沉積(ji)堵(du)塞管(guan)(guan)道。