戶外不銹鋼風管
尺寸計算
風管尺寸=風量/風速
風量(liang)=房(fang)間(jian)面積*房(fang)間(jian)高*換氣(qi)次數
例子:風(feng)量(liang)4萬,風(feng)速(su)9m/s,
得風管尺寸=40000/9/3600=1.23平(ping)方(fang)
1.23=1.5*0.82
所以(yi) 風管尺寸為1500*800 。
管道直徑設計計算步驟:
1、繪(hui)制通(tong)風(feng)或(huo)空調系統軸測(ce)圖,對各管段(duan)進行(xing)編號,標注(zhu)長度和風(feng)量。管段(duan)長度一般按兩管件(jian)中心線長度計(ji)算,不扣除管件(jian)(如三(san)通(tong),彎頭)本身的長度。
2、確定合理的(de)空(kong)氣速流
風管內的(de)空(kong)(kong)(kong)氣流(liu)速(su)(su)對(dui)(dui)通(tong)風、空(kong)(kong)(kong)調系(xi)統(tong)(tong)(tong)的(de)經濟型有較大(da)的(de)影響。流(liu)速(su)(su)高,風管斷面小(xiao),材(cai)料耗(hao)用(yong)少(shao),建(jian)(jian)造費(fei)用(yong)小(xiao);但是(shi)系(xi)統(tong)(tong)(tong)的(de)阻力(li)(li)大(da),動(dong)力(li)(li)消耗(hao)增(zeng)大(da),運用(yong)費(fei)用(yong)增(zeng)加(jia)。對(dui)(dui)除塵系(xi)統(tong)(tong)(tong)會(hui)增(zeng)加(jia)設備和管道的(de)磨損,對(dui)(dui)空(kong)(kong)(kong)調系(xi)統(tong)(tong)(tong)會(hui)增(zeng)加(jia)噪聲。流(liu)速(su)(su)低,阻力(li)(li)小(xiao),動(dong)力(li)(li)消耗(hao)少(shao);但是(shi)風管斷面大(da),材(cai)料和建(jian)(jian)造費(fei)用(yong)大(da),風管占(zhan)用(yong)的(de)空(kong)(kong)(kong)間也增(zeng)大(da)。對(dui)(dui)除塵系(xi)統(tong)(tong)(tong)流(liu)速(su)(su)過低會(hui)使粉塵沉積堵塞管道。