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4萬(wan)，風速9m/s，

        得風管(guan)尺寸=40000/9/3600=1.23平方(fang)

        1.23=1.5*0.82

        所(suo)以 風管尺寸為1500*800 。

管道直徑設計計算步驟：

        1、繪制通(tong)風或空調(diao)系統軸測(ce)圖，對(dui)各管(guan)(guan)段進行編(bian)號(hao)，標(biao)注長度(du)和(he)風量。管(guan)(guan)段長度(du)一般按兩(liang)管(guan)(guan)件中心線長度(du)計(ji)算(suan)，不扣除管(guan)(guan)件（如三通(tong)，彎頭(tou)）本(ben)身(shen)的(de)長度(du)。

        2、確(que)定合理的空氣速流

        風(feng)管(guan)內的空(kong)氣流(liu)速對通風(feng)、空(kong)調系(xi)統(tong)的經(jing)濟型有較大(da)(da)的影響(xiang)。流(liu)速高，風(feng)管(guan)斷面小，材(cai)料耗(hao)用(yong)(yong)(yong)(yong)少(shao)，建造(zao)費(fei)用(yong)(yong)(yong)(yong)小；但(dan)是系(xi)統(tong)的阻力大(da)(da)，動力消耗(hao)增(zeng)(zeng)大(da)(da)，運用(yong)(yong)(yong)(yong)費(fei)用(yong)(yong)(yong)(yong)增(zeng)(zeng)加。對除塵系(xi)統(tong)會增(zeng)(zeng)加設備和管(guan)道的磨損，對空(kong)調系(xi)統(tong)會增(zeng)(zeng)加噪聲(sheng)。流(liu)速低，阻力小，動力消耗(hao)少(shao)；但(dan)是風(feng)管(guan)斷面大(da)(da)，材(cai)料和建造(zao)費(fei)用(yong)(yong)(yong)(yong)大(da)(da)，風(feng)管(guan)占用(yong)(yong)(yong)(yong)的空(kong)間也增(zeng)(zeng)大(da)(da)。對除塵系(xi)統(tong)流(liu)速過低會使(shi)粉塵沉積堵塞管(guan)道。