James.P.Lux at jpl.nasa.gov
Mon Oct 4 16:11:30 PDT 2004
At 03:19 PM 10/4/2004 -0700, Jack Wathey wrote:
Very nice.. particularly the efforts you put into the cooling air. The
comment about flow against a pressure drop is very sound.
I realize it's a time thing, but had you considered removing the fans from
the power supplies?
What's a rough order of magnitude cost on the blower/VFD? Does this VFD
have a "servo" input that could be used to automatically change blower
speed in response to temperature? (some VFDs have an analog input that can
be used to set up a speed = linear function of input voltage, and by
cleverly setting the gain and offset, you can do quite nicely)
James Lux, P.E.
Spacecraft Radio Frequency Subsystems
Flight Telecommunications Systems
Jet Propulsion Laboratory, Mail Stop 161-213
4800 Oak Grove Drive
Pasadena CA 91109
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