烟囱阻力计算

1、,烟风道阻力计算,序号,项目,符号,单位,公式或来源,数值,备注,一,冷风道阻力计算,风道长度,La1,m,20 ,风道截面边长,aa1,m,0.80 ,风道截面边长,aa2,m,0.80 ,当量直径,deq,2*aa1*aa2/(aa1+aa2),0.80 ,风道数量,n,2 ,风道空气流量,Vla,m3/s,已知,78192 ,风道空气流速,wla,m/s,17.0 ,空气温度,30 ,标态空气密度,0a,kg/m3,1.293 ,冷空气密度,a,m3/s,1.165 ,摩擦阻力系数,金属：0.02；砖：0.04,0.02,风道摩擦阻力,ha1,*La1/deq*w21a/2*a,83.9

2、 ,局部阻力,Pa,w,a,喇叭型吸风口,Pa,*w2*a/2,31.7 ,0.25,14,1.293,送风机进口,Pa,*w2*a/2,130.8 ,0.7,17,1.293,送风机出口渐扩管,Pa,*w2*a/2,41.4 ,0.16,20,1.293,缓弯头(圆管),Pa,*w2*a/2,186.8 ,1,17,1.293,冷风道总阻力,474.5 ,二,热风道阻力计算,风道长度,La1,m,30 ,风道截面边长,aa1,m,0.80 ,风道截面边长,aa2,m,1.00 ,当量直径,deq,2*aa1*aa2/(aa1+aa2),0.89 ,风道数量,n,2 ,风道空气流量,Vla,m

3、3/s,同上,78192 ,风道空气流速,wla,m/s,13.6 ,空气温度,150 ,标态空气密度,0a,kg/m3,1.293 ,热空气密度,a,m3/s,0.834 ,摩擦阻力系数,金属：0.02；砖：0.04,0.02,风道摩擦阻力,ha1,*La1/deq*w21a/2*a,51.9 ,局部阻力,w,a,3个相同的90度弧形弯头,Pa,*w2*a/2,34.2 ,0.27,14,1.293,风室入口,Pa,*w2*a/2,186.8 ,1,17,1.293,进风管转动挡板,Pa,*w2*a/2,18.7 ,0.1,17,1.293,热风道总阻力,Pa,291.6 ,风道总阻力,Pa

4、,766.2 ,三,烟道阻力计算,烟道长度,La1,m,20 ,烟道截面边长,aa1,m,1.20 ,烟道截面边长,aa2,m,1.20 ,当量直径,deq,2*aa1*aa2/(aa1+aa2),1.20 ,烟道数量,n,2 ,烟道空气流量,Vla,m3/s,142563 ,烟道空气流速,wla,m/s,13.8 ,烟气温度,30 ,标态烟气密度,0a,kg/m3,1.293 ,烟气密度,a,m3/s,1.165 ,摩擦阻力系数,金属：0.02；砖：0.04,0.02,烟道摩擦阻力,ha1,Pa,*La1/deq*w21a/2*a,36.7 ,局部阻力,w,a,除尘器前90度弧形弯头,Pa,*w2*a/2,46.3 ,0.27 ,16,1.34,对称分支管,Pa,*w2*a/2,35.5 ,0.27 ,14,1.34,2个相同的90度弧形弯头,Pa,*w2*a/2,35.5 ,0.27 ,14,1.34,引风机进口,Pa,*w2*a/2,91.9 ,0.7,14,1.34,引风机出口渐扩管,Pa,*w2*a/2