戶外不銹鋼風管
尺寸計算
風管尺寸=風量/風速
風量(liang)=房間面(mian)積*房間高*換氣次數(shu)
例子(zi):風量4萬,風速9m/s,
得風(feng)管尺(chi)寸=40000/9/3600=1.23平(ping)方
1.23=1.5*0.82
所(suo)以 風(feng)管尺寸為(wei)1500*800 。
管道直徑設計計算步驟:
1、繪制(zhi)通風或空調系(xi)統軸測圖,對各管段進行編號(hao),標注(zhu)長(chang)度(du)和(he)風量。管段長(chang)度(du)一般(ban)按(an)兩管件中心線長(chang)度(du)計(ji)算(suan),不扣除管件(如(ru)三(san)通,彎(wan)頭)本身的長(chang)度(du)。
2、確定合(he)理的空氣速流
風(feng)管(guan)(guan)(guan)內(nei)的(de)空(kong)氣流(liu)(liu)速(su)對通風(feng)、空(kong)調系統(tong)(tong)的(de)經濟(ji)型(xing)有較(jiao)大(da)的(de)影響。流(liu)(liu)速(su)高,風(feng)管(guan)(guan)(guan)斷面小,材料耗(hao)用(yong)(yong)少,建造(zao)費(fei)(fei)用(yong)(yong)小;但(dan)是系統(tong)(tong)的(de)阻(zu)力大(da),動(dong)力消耗(hao)增(zeng)(zeng)(zeng)大(da),運(yun)用(yong)(yong)費(fei)(fei)用(yong)(yong)增(zeng)(zeng)(zeng)加。對除塵系統(tong)(tong)會增(zeng)(zeng)(zeng)加設(she)備和管(guan)(guan)(guan)道(dao)的(de)磨損(sun),對空(kong)調系統(tong)(tong)會增(zeng)(zeng)(zeng)加噪聲。流(liu)(liu)速(su)低,阻(zu)力小,動(dong)力消耗(hao)少;但(dan)是風(feng)管(guan)(guan)(guan)斷面大(da),材料和建造(zao)費(fei)(fei)用(yong)(yong)大(da),風(feng)管(guan)(guan)(guan)占用(yong)(yong)的(de)空(kong)間也增(zeng)(zeng)(zeng)大(da)。對除塵系統(tong)(tong)流(liu)(liu)速(su)過低會使粉塵沉積堵塞管(guan)(guan)(guan)道(dao)。