煙囪阻力計算

1、,煙風道阻力計算,序號,項目,符號,單位,公式或來源,數(shù)值,備注,一,冷風道阻力計算,風道長度,La1,m,20 ,風道截面邊長,aa1,m,0.80 ,風道截面邊長,aa2,m,0.80 ,當量直徑,deq,2*aa1*aa2/(aa1+aa2),0.80 ,風道數(shù)量,n,2 ,風道空氣流量,Vla,m3/s,已知,78192 ,風道空氣流速,wla,m/s,17.0 ,空氣溫度,30 ,標態(tài)空氣密度,0a,kg/m3,1.293 ,冷空氣密度,a,m3/s,1.165 ,摩擦阻力系數(shù),金屬：0.02；磚：0.04,0.02,風道摩擦阻力,ha1,*La1/deq*w21a/2*a,83.9

2、 ,局部阻力,Pa,w,a,喇叭型吸風口,Pa,*w2*a/2,31.7 ,0.25,14,1.293,送風機進口,Pa,*w2*a/2,130.8 ,0.7,17,1.293,送風機出口漸擴管,Pa,*w2*a/2,41.4 ,0.16,20,1.293,緩彎頭(圓管),Pa,*w2*a/2,186.8 ,1,17,1.293,冷風道總阻力,474.5 ,二,熱風道阻力計算,風道長度,La1,m,30 ,風道截面邊長,aa1,m,0.80 ,風道截面邊長,aa2,m,1.00 ,當量直徑,deq,2*aa1*aa2/(aa1+aa2),0.89 ,風道數(shù)量,n,2 ,風道空氣流量,Vla,m

3、3/s,同上,78192 ,風道空氣流速,wla,m/s,13.6 ,空氣溫度,150 ,標態(tài)空氣密度,0a,kg/m3,1.293 ,熱空氣密度,a,m3/s,0.834 ,摩擦阻力系數(shù),金屬：0.02；磚：0.04,0.02,風道摩擦阻力,ha1,*La1/deq*w21a/2*a,51.9 ,局部阻力,w,a,3個相同的90度弧形彎頭,Pa,*w2*a/2,34.2 ,0.27,14,1.293,風室入口,Pa,*w2*a/2,186.8 ,1,17,1.293,進風管轉(zhuǎn)動擋板,Pa,*w2*a/2,18.7 ,0.1,17,1.293,熱風道總阻力,Pa,291.6 ,風道總阻力,Pa

4、,766.2 ,三,煙道阻力計算,煙道長度,La1,m,20 ,煙道截面邊長,aa1,m,1.20 ,煙道截面邊長,aa2,m,1.20 ,當量直徑,deq,2*aa1*aa2/(aa1+aa2),1.20 ,煙道數(shù)量,n,2 ,煙道空氣流量,Vla,m3/s,142563 ,煙道空氣流速,wla,m/s,13.8 ,煙氣溫度,30 ,標態(tài)煙氣密度,0a,kg/m3,1.293 ,煙氣密度,a,m3/s,1.165 ,摩擦阻力系數(shù),金屬：0.02；磚：0.04,0.02,煙道摩擦阻力,ha1,Pa,*La1/deq*w21a/2*a,36.7 ,局部阻力,w,a,除塵器前90度弧形彎頭,Pa,*w2*a/2,46.3 ,0.27 ,16,1.34,對稱分支管,Pa,*w2*a/2,35.5 ,0.27 ,14,1.34,2個相同的90度弧形彎頭,Pa,*w2*a/2,35.5 ,0.27 ,14,1.34,引風機進口,Pa,*w2*a/2,91.9 ,0.7,14,1.34,引風機出口漸擴管,Pa,*w2*a/2