Need a high static blower for a portable aircraft A/C

[H2OENG]

I'm building a portable air conditioner for use when servicing aircraft in the hangar. Its only a 5 ton unit(electrical service limitations) and will use 14" flex duct. They have requested that the unit be able to connect to the aircraft ducting (through only an 8" port!), and the aircraft fans will distribute the cooled air throughout the plane. Heat load on the aircraft will only be a few mechanics, and possibly some electrical gear. Plane will be inside the hangar, but at ambient temps up to 100 deg. (Sacramento, CA)
Upon researching existing units purpose built for ground service cooling, I've found the static pressure ratings up to 25"! So I am looking at retrofitting a high static blower into the unit. The aircraft system while in use, if I remember right, is about 7" SP. So I would like to get at least 7-10" pressure out of it, at 2000cfm.
I'm curious about a few things:
1. How much heat do you think the extra static blower will produce, reducing my already taxed tonnage?
2. How much more electrical power do high pressure units draw than lower static blowers?
3. What fan companies have you folks used for special applications?
Any pointers are greatly appreciated!
Chris

 

[willard3]

snip
2. How much more electrical power do high pressure units draw than lower static blowers?
snip

Fan Hp equation:

air hp = ((flow-cfm)x (head-in w.c.)/6370) x (1/fan mech efficiency)

 

[marcoh]

I recently did a concept study on preconditioned air for aircraft and it was quite an eye opener! Typical supply condition are 0 degree Celsius at 8000Pa to the aircraft!

Contact Jetway

http://www.jetway.com

who are one of the larger supplier worldwide on such systems.

 

[thruthefence]

Have you considered adding a "return air" duct to your system? It was a little complicated fabricating the duct at the air conditioner itself, but it made a huge improvement in the performance. I also added a "booster" axial flow fan in the cool air duct. ( available at builder supply stores ).The small centrifugal blower in the unit itself wasn't up to the task. This is a little 110V window unit, but it will almost run you out of the small corporate aircraft I maintain. The disadvantage is that you have two ducts running to the aircraft, instead of one.