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*換氣次數
例子(zi):風量(liang)4萬,風速9m/s,
得風(feng)管尺(chi)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(zhi)通(tong)(tong)風(feng)或空調系統軸測圖(tu),對各管(guan)段進行編號,標注長(chang)(chang)度(du)和風(feng)量(liang)。管(guan)段長(chang)(chang)度(du)一般(ban)按兩管(guan)件中(zhong)心線(xian)長(chang)(chang)度(du)計算,不扣除管(guan)件(如三(san)通(tong)(tong),彎頭)本身的(de)長(chang)(chang)度(du)。
2、確定合理的空氣速(su)流
風管(guan)(guan)(guan)(guan)內的(de)(de)(de)空(kong)氣流速對(dui)(dui)通(tong)風、空(kong)調(diao)系(xi)統(tong)的(de)(de)(de)經濟型有較大(da)(da)的(de)(de)(de)影響。流速高(gao),風管(guan)(guan)(guan)(guan)斷面小(xiao),材料耗用(yong)(yong)少,建(jian)(jian)造費用(yong)(yong)小(xiao);但是系(xi)統(tong)的(de)(de)(de)阻(zu)力(li)大(da)(da),動(dong)力(li)消耗增(zeng)大(da)(da),運用(yong)(yong)費用(yong)(yong)增(zeng)加。對(dui)(dui)除(chu)塵系(xi)統(tong)會增(zeng)加設(she)備和管(guan)(guan)(guan)(guan)道的(de)(de)(de)磨損(sun),對(dui)(dui)空(kong)調(diao)系(xi)統(tong)會增(zeng)加噪(zao)聲。流速低,阻(zu)力(li)小(xiao),動(dong)力(li)消耗少;但是風管(guan)(guan)(guan)(guan)斷面大(da)(da),材料和建(jian)(jian)造費用(yong)(yong)大(da)(da),風管(guan)(guan)(guan)(guan)占用(yong)(yong)的(de)(de)(de)空(kong)間(jian)也(ye)增(zeng)大(da)(da)。對(dui)(dui)除(chu)塵系(xi)統(tong)流速過(guo)低會使粉塵沉積堵(du)塞管(guan)(guan)(guan)(guan)道。