戶外不銹鋼風管
尺寸計算
風管尺寸=風量/風速
風量(liang)=房(fang)間面積*房(fang)間高*換氣(qi)次數
例子:風量4萬,風速9m/s,
得風管尺寸=40000/9/3600=1.23平方
1.23=1.5*0.82
所以 風(feng)管尺寸為1500*800 。
管道直徑設計計算步驟:
1、繪(hui)制(zhi)通風(feng)或空(kong)調系統(tong)軸測(ce)圖,對各管段進行編(bian)號,標注(zhu)長度(du)(du)和風(feng)量。管段長度(du)(du)一(yi)般按(an)兩(liang)管件中(zhong)心(xin)線(xian)長度(du)(du)計算,不扣除管件(如三通,彎頭(tou))本(ben)身的長度(du)(du)。
2、確定合理的空氣速流
風管(guan)(guan)內(nei)的空氣(qi)流(liu)速對(dui)通(tong)風、空調(diao)系(xi)(xi)統(tong)(tong)的經濟(ji)型有較大(da)的影響。流(liu)速高(gao),風管(guan)(guan)斷面(mian)小,材(cai)料(liao)耗用(yong)(yong)少(shao),建造費用(yong)(yong)小;但(dan)是(shi)系(xi)(xi)統(tong)(tong)的阻力(li)大(da),動力(li)消耗增(zeng)大(da),運用(yong)(yong)費用(yong)(yong)增(zeng)加(jia)。對(dui)除塵系(xi)(xi)統(tong)(tong)會(hui)增(zeng)加(jia)設(she)備(bei)和管(guan)(guan)道的磨損,對(dui)空調(diao)系(xi)(xi)統(tong)(tong)會(hui)增(zeng)加(jia)噪(zao)聲。流(liu)速低,阻力(li)小,動力(li)消耗少(shao);但(dan)是(shi)風管(guan)(guan)斷面(mian)大(da),材(cai)料(liao)和建造費用(yong)(yong)大(da),風管(guan)(guan)占(zhan)用(yong)(yong)的空間(jian)也增(zeng)大(da)。對(dui)除塵系(xi)(xi)統(tong)(tong)流(liu)速過低會(hui)使粉(fen)塵沉積堵塞(sai)管(guan)(guan)道。