L(fng)ϵy(tng)O(sh)ӋO(sh)Ӌ棬ĩO(sh)O(sh)ӋxһrSֻoO(sh)ӋһЩL(fng)CPܵO(sh)̖ߴ煢(sh)ȗlȻO(sh)Ӌ߸(j)O(sh)ӋrlMx
1ȫӉo
l 1)ȫַQL(fng)Cĉ^ָλwewͨ^L(fng)C@õλPa,mmH2O
H=ρν.ν/2 H=ν.ν/1.69
2)Ӊָλwewͨ^L(fng)C@õٶӶ(do)Ӌ㹫ʽ
l3)oo=ȫ-Ӊ
ע⣺L(fng)CoL(fng)CڵoҲL(fng)CcMo
l4)Cָ{(dio)O(sh)L(fng)ʣ^|(zh)ǿ۳{(dio)O(sh)ĉ^pʧ
l5)o˷
2L(fng)܃(ni)L(fng)ٵĴ_
l L(fng)O(sh)ӋҪL(fng)ܳߴĴ_L(fng)pʧӋ㣬L(fng)ٵĴ_c߾P(gun)ȑ(yng)_L(fng)L(fng)ٵĴ_cͶYϵy(tng)\Mú͚P(gun)L(fng)ٿɅ±
L(fng)xñ
3L(fng)ܳߴx
l 1)L(fng)eĴ_
{(dio)gL(fng)֪r_L(fng)ܵߴķЃɷNٶL(fng)ٷͱ跨ٶٶȷ^F(xin)B֮
ȑ(yng)֪{(dio)L(fng)(ǰķ)Ȼ(j)Ŀ{(dio)L(fng)ϵy(tng)L(fng)ֵ(ٶL(fng)еL(fng)ͨ^ʽӋL(fng)e
_L(fng)Ĺ(Aֱιܵ߅L)
L(fng)eӋ㹫ʽ
F=L/(v×3600) m2 (6-2)
ʽ L--L(fng) m3/h
l磺
{(dio)ϵy(tng)L(fng)L=7200m3/h{(dio)ֵҪ60dBF(xin)bһL(fng)ԇ_L(fng)ܳߴ
ٶL(fng)L(fng)ٱ֪{(dio)ϵy(tng)L(fng)L(fng)]ֵ6~9m/sF(xin)ȡ8m/s
L(fng)eӋ
F=L/(v×3600)=7200/(8×3600)=0.25 m2
d=m*√4F/Π
ÈAL(fng)ֱʽӋ
ʽ π——A π=3.14
F——L(fng)e m2
D=0.56m=560 mm
÷L(fng)߅L(yng)
A=√F=√0.25=500mm
{(dio)L(fng)ܺO(sh)r豣أ(1)pĴҲ(jng)r;(2)pĴʹ܃(ni)|(zh)ض_Ҫr;(3)ܵͨ^҃(ni)՚Ⅲ(sh)ҪƵķgڹܵɢʹ҃(ni)(sh)_Ҏ(gu)ֵr;(4)ܵܽY(ji)¶r
غȣ
һ{(dio)¶ȣ
PEF壺10~15mm
ޣ25mm
һǿ{(dio)ȣ
PEF壺25~30mm
ޣ50~60mm
һƪ
xُͥ{(dio)
һƪ
e{(dio)ʹ÷