鍍鋅風管廠家

重慶通風設備

風量計算

風量風速公式計算

風量=通風終端的總和

風速=管(guan)道內的流(liu)速

風壓=排(pai)風時管道內的壓力

要求送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)從風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)側(ce)壁上(shang)的(de)(de)(de)(de)(de)若干(gan)風(feng)(feng)(feng)(feng)口(kou)(kou)(kou)（或短(duan)管(guan)(guan)(guan)），以相同的(de)(de)(de)(de)(de)出(chu)(chu)口(kou)(kou)(kou)速(su)度(du)，均(jun)(jun)(jun)勻(yun)地把(ba)等量(liang)的(de)(de)(de)(de)(de)空氣送(song)(song)(song)(song)入室內，這種送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)稱(cheng)為均(jun)(jun)(jun)勻(yun)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)。均(jun)(jun)(jun)勻(yun)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)構造有兩種形(xing)式(shi)，一(yi)種是(shi)均(jun)(jun)(jun)勻(yun)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)斷(duan)面(mian)變化(hua)（即(ji)斷(duan)面(mian)逐漸(jian)縮小）而(er)側(ce)風(feng)(feng)(feng)(feng)口(kou)(kou)(kou)（或短(duan)管(guan)(guan)(guan)）的(de)(de)(de)(de)(de)面(mian)積相等；另一(yi)種是(shi)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)斷(duan)面(mian)不變化(hua)而(er)側(ce)風(feng)(feng)(feng)(feng)口(kou)(kou)(kou)（或短(duan)管(guan)(guan)(guan)）的(de)(de)(de)(de)(de)面(mian)積都不相等。 其(qi)計(ji)(ji)算(suan)的(de)(de)(de)(de)(de)基本原(yuan)理是(shi)保持(chi)各(ge)側(ce)孔(kong)的(de)(de)(de)(de)(de)靜(jing)壓(ya)相等。根據(ju)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)阻力(li)的(de)(de)(de)(de)(de)計(ji)(ji)算(suan)和能量(liang)方程(cheng)即(ji)可求得各(ge)側(ce)孔(kong)靜(jing)壓(ya)相等的(de)(de)(de)(de)(de)關系(xi)式(shi)。 均(jun)(jun)(jun)勻(yun)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)計(ji)(ji)算(suan)的(de)(de)(de)(de)(de)目(mu)的(de)(de)(de)(de)(de)是(shi)確(que)定(ding)側(ce)孔(kong)的(de)(de)(de)(de)(de)面(mian)積, 風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)以及(ji)均(jun)(jun)(jun)勻(yun)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)段的(de)(de)(de)(de)(de)阻力(li)。 當(dang)側(ce)孔(kong)的(de)(de)(de)(de)(de)數(shu)量(liang)，側(ce)孔(kong)的(de)(de)(de)(de)(de)間距以及(ji)每個側(ce)孔(kong)的(de)(de)(de)(de)(de)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)量(liang)確(que)定(ding)之后，按上(shang)述(shu)原(yuan)理即(ji)可計(ji)(ji)算(suan)出(chu)(chu)均(jun)(jun)(jun)勻(yun)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)尺寸。均(jun)(jun)(jun)勻(yun)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)計(ji)(ji)算(suan)方法(fa)是(shi)：（1）確(que)定(ding)側(ce)孔(kong)個數(shu)、側(ce)孔(kong)間距及(ji)每個側(ce)孔(kong)的(de)(de)(de)(de)(de)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)量(liang)。（2）計(ji)(ji)算(suan)出(chu)(chu)側(ce)孔(kong)面(mian)積f0 m2式(shi)中(zhong) L0——均(jun)(jun)(jun)勻(yun)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)總風(feng)(feng)(feng)(feng)量(liang)，m3/h；——側(ce)孔(kong)的(de)(de)(de)(de)(de)平均(jun)(jun)(jun)出(chu)(chu)流速(su)度(du)，m/s；f0——側(ce)孔(kong)面(mian)積，m2。側(ce)孔(kong)靜(jing)壓(ya)流速(su)式(shi)中(zhong) μ——孔(kong)口(kou)(kou)(kou)的(de)(de)(de)(de)(de)流量(liang)系(xi)數(shu)。（3）計(ji)(ji)算(suan)送(song)(song)(song)(song)風(feng)(feng)(feng)(feng)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)直徑(jing)（或斷(duan)面(mian)尺寸）首先(xian)按vj/vd≥1.73的(de)(de)(de)(de)(de)原(yuan)則設定(ding)vd（管(guan)(guan)(guan)內速(su)度(du)），然后計(ji)(ji)算(suan)對應段的(de)(de)(de)(de)(de)管(guan)(guan)(guan)段直徑(jing)D： （4）計(ji)(ji)算(suan)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)阻力(li)側(ce)孔(kong)應有的(de)(de)(de)(de)(de)靜(jing)壓(ya)。

尺寸計算編輯

風(feng)(feng)管尺寸=風(feng)(feng)量(liang)/風(feng)(feng)速

風量(liang)=房間(jian)(jian)面積*房間(jian)(jian)高*換氣(qi)次數

例(li)子:風(feng)量4萬，風(feng)速9m/s，

得風管尺(chi)寸=40000/9/3600=1.23平(ping)方(fang)

1.23=1.5*0.82

所以 風管尺(chi)寸(cun)為(wei)1500*800 。

管道直(zhi)徑設計計算步驟：

1、繪(hui)制通風(feng)或空(kong)調系統軸測(ce)圖，對各管(guan)段進行編號(hao)，標注長度(du)(du)和風(feng)量。管(guan)段長度(du)(du)一般按兩管(guan)件中(zhong)心線長度(du)(du)計算，不扣除管(guan)件（如(ru)三通，彎(wan)頭）本身(shen)的(de)長度(du)(du)。

2、確(que)定合理的空氣速流

風(feng)(feng)管(guan)內的空氣流速對(dui)通風(feng)(feng)、空調(diao)系(xi)統的經濟型有(you)較大的影(ying)響。流速高(gao)，風(feng)(feng)管(guan)斷(duan)面(mian)小，材料耗(hao)用少，建造費(fei)用小；但是(shi)系(xi)統的阻力(li)大，動力(li)消(xiao)耗(hao)增大，運(yun)用費(fei)用增加(jia)。對(dui)除塵(chen)系(xi)統會(hui)增加(jia)設備和管(guan)道的磨損(sun)，對(dui)空調(diao)系(xi)統會(hui)增加(jia)噪聲。流速低(di)，阻力(li)小，動力(li)消(xiao)耗(hao)少；但是(shi)風(feng)(feng)管(guan)斷(duan)面(mian)大，材料和建造費(fei)用大，風(feng)(feng)管(guan)占用的空間也增大。對(dui)除塵(chen)系(xi)統流速過低(di)會(hui)使粉塵(chen)沉積堵塞(sai)管(guan)道。