pressure in VFD room
pressure in VFD room
(OP)
I am working on the design of HVAC system for a VFD room, which is a part of a modular building.
My main concern is to apply positive pressure inside the VFD room.
How do I achieve that and what is the recommended positive pressure?
VFD produces 15000cfm hot air.
Room Dimensions are 20'Lx15'Wx14'H
HVAC unit used = 6 tons
Thank you
My main concern is to apply positive pressure inside the VFD room.
How do I achieve that and what is the recommended positive pressure?
VFD produces 15000cfm hot air.
Room Dimensions are 20'Lx15'Wx14'H
HVAC unit used = 6 tons
Thank you





RE: pressure in VFD room
RE: pressure in VFD room
The 15000cfm is produced from the VFD itself and is blown into the room where the vfd exists.
Thanks
RE: pressure in VFD room
RE: pressure in VFD room
RE: pressure in VFD room
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: pressure in VFD room
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: pressure in VFD room
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: pressure in VFD room
RE: pressure in VFD room
Well,I checked the specs. of the VDF --and it produces 15000cfm. I have to explain more ..the room has an external door of 4' x 9' and internal one of 4'x9'.The external temp. is ranging from -2C to 40C. There is another sourse of leakage which is the louvers of the intake fan.
Please tell me what other info might be helpful.
RE: pressure in VFD room
Where is the air intake? Where is the air discharge?
With 15,000 cfm to work with in a 4200 cubic foot room you will have no problems establishing a positive pressure - at least until the walls fall down.
RE: pressure in VFD room
The vfd has a rectifier and a transformer(this is the source of heat).
Exhaust louver to be used to discharge the air outside the room,and an intake grill to be used to recerculate it through the room.
RE: pressure in VFD room
Since you are blowing air into the room you "should" have a small positive pressure. If you need more you either need a higher pressure fan, smaller outlet louvers or to fix your leaks.
RE: pressure in VFD room
Is their a formula to calculate?and how to maintain this.
Any other design or control options?
RE: pressure in VFD room
In your case, you are bringing in an AWFUL LOT of outside air via the drive's cooling fans. Every cubic foot of this outside air has some amount of dust in it. Is this outside air filtered? To what degree?
RE: pressure in VFD room
RE: pressure in VFD room
RE: pressure in VFD room
It sounds like your VFD is bringing in filtered air to cool itself and I would bet the VFD is designed to maintain its own positive internal pressure to prevent dust ingress.
RE: pressure in VFD room
RE: pressure in VFD room
Do you think 6 ton A/C unit will be good enough to cool the room.
RE: pressure in VFD room
Just an electrical observation.
RE: pressure in VFD room
RE: pressure in VFD room
RE: pressure in VFD room
T300MVi - dimension 104x222x50inches
http://www.toshiba.com/ind/product_display.jsp?