戶外不銹鋼風管
尺寸計算
風管尺寸=風量/風速
風(feng)量=房(fang)(fang)間(jian)(jian)面積*房(fang)(fang)間(jian)(jian)高*換氣次數
例子:風量4萬,風速(su)9m/s,
得(de)風管(guan)尺(chi)寸=40000/9/3600=1.23平方(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、繪制(zhi)通風或(huo)空調系統(tong)軸測圖(tu),對各(ge)管段進行編(bian)號,標注長(chang)度和風量。管段長(chang)度一(yi)般按兩管件中(zhong)心線長(chang)度計算(suan),不扣(kou)除管件(如(ru)三通,彎頭)本身的(de)長(chang)度。
2、確定合(he)理的空(kong)氣速(su)流
風(feng)管(guan)(guan)(guan)內的(de)空(kong)氣(qi)流速對(dui)(dui)通(tong)風(feng)、空(kong)調系(xi)統(tong)的(de)經(jing)濟型有(you)較大(da)的(de)影響(xiang)。流速高(gao),風(feng)管(guan)(guan)(guan)斷面小(xiao),材料耗(hao)用(yong)(yong)(yong)少,建(jian)造(zao)費(fei)用(yong)(yong)(yong)小(xiao);但(dan)是(shi)系(xi)統(tong)的(de)阻(zu)(zu)力(li)大(da),動力(li)消耗(hao)增(zeng)(zeng)大(da),運用(yong)(yong)(yong)費(fei)用(yong)(yong)(yong)增(zeng)(zeng)加。對(dui)(dui)除(chu)塵系(xi)統(tong)會增(zeng)(zeng)加設備和管(guan)(guan)(guan)道的(de)磨損,對(dui)(dui)空(kong)調系(xi)統(tong)會增(zeng)(zeng)加噪聲。流速低,阻(zu)(zu)力(li)小(xiao),動力(li)消耗(hao)少;但(dan)是(shi)風(feng)管(guan)(guan)(guan)斷面大(da),材料和建(jian)造(zao)費(fei)用(yong)(yong)(yong)大(da),風(feng)管(guan)(guan)(guan)占(zhan)用(yong)(yong)(yong)的(de)空(kong)間也增(zeng)(zeng)大(da)。對(dui)(dui)除(chu)塵系(xi)統(tong)流速過低會使粉塵沉積堵塞管(guan)(guan)(guan)道。