戶外不銹鋼風管
尺寸計算
風管尺寸=風量/風速
風量(liang)=房間面積*房間高*換氣(qi)次數
例(li)子:風(feng)量(liang)4萬(wan),風(feng)速9m/s,
得(de)風管尺寸=40000/9/3600=1.23平方
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、繪制通(tong)風(feng)或空調(diao)系統軸測圖,對各管段進行編號(hao),標注(zhu)長(chang)(chang)(chang)度和(he)風(feng)量。管段長(chang)(chang)(chang)度一般按兩管件(jian)(jian)中心線長(chang)(chang)(chang)度計(ji)算,不扣除管件(jian)(jian)(如三通(tong),彎頭)本身(shen)的(de)長(chang)(chang)(chang)度。
2、確定(ding)合理的空(kong)氣速流
風管(guan)內(nei)的空(kong)(kong)氣流速(su)(su)對通風、空(kong)(kong)調系(xi)(xi)統(tong)的經濟型有較大(da)的影響。流速(su)(su)高,風管(guan)斷面小,材料耗用(yong)少,建造費用(yong)小;但是(shi)系(xi)(xi)統(tong)的阻力(li)(li)(li)大(da),動力(li)(li)(li)消耗增(zeng)(zeng)(zeng)大(da),運用(yong)費用(yong)增(zeng)(zeng)(zeng)加。對除塵系(xi)(xi)統(tong)會增(zeng)(zeng)(zeng)加設(she)備和管(guan)道的磨損,對空(kong)(kong)調系(xi)(xi)統(tong)會增(zeng)(zeng)(zeng)加噪聲。流速(su)(su)低(di)(di),阻力(li)(li)(li)小,動力(li)(li)(li)消耗少;但是(shi)風管(guan)斷面大(da),材料和建造費用(yong)大(da),風管(guan)占用(yong)的空(kong)(kong)間(jian)也增(zeng)(zeng)(zeng)大(da)。對除塵系(xi)(xi)統(tong)流速(su)(su)過低(di)(di)會使粉塵沉積堵塞管(guan)道。