发布时间:2025-01-30 22:06:03
先按照化工原理里的方法算得全风压,结合空气流量来选型。如:通风机的选择易得空气入口和出口间的压差即为填料层压降、除雾沫器压降及阻力损失(大约取240Pa)Pt=ΔP+ρΔu2+Δpf=441.45+150+0+240=931.45Pa空气流量2900m3/h查引风机型号参数表,得Y6-41-11No.5.4A型引风机较合适转速: 1420rpm流量: 44358-2130m3/h全风压: 994-1254Pa电机功率:3kW。
apple的ipad2018怎么样和ipadair2哪个更好
2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:033dmax切换正视图快捷键是啥3ds max切换正视图的快捷键是什么呢
2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03 2025-01-30 22:06:03