[BC] New Years Resolutions, or a tale in two acts.

[khcs@juno.com]

Tom recalled:

>Having had bad  
experiences in the past with air conditioners (Especially with our wild  
weather, 60 one day, 29 the next), when we installed our 10 kw frequency  
modulated space heater we put in a system of fans (really attic exhaust  
blowers) to keep air moving.  Three in, each individually fused, and the  
thermostats staggered, along the bottom of one wall, and three more up in  
the peak of the roof for exhaust.  Works pretty well, we do need to keep  
the filters (furnace filters under a hood on the air intake) replaced,  
especially in grass -mowing season, as they will plug up.  Have to replace  
the fans every once in a while, but usually the motor just dies, doesn't  
even pop the 5 amp in-line fuse.  But the system works, the big 10 K  
usually runs only a few degrees above the outside air temperature even on hot days.  Lots of air moving.

-------------

Yes, that's the way to do it, except around here where temps can get over 120 degrees in the summer, and there is a lot of sand blowing at times.  Then it's better to use recycled cooled air.  

I used to have a computer program (that I wrote) that would take the difference between AC input power and RF output power, convert that figure from watts to BTU, and then calculate the necessary size for the air inlets/outlets.  Factoring in the extra dimensions necessary to accomodate for bug screens.  That would allow the inside of the building, if properly insulated from sun load, to run at approximately the outside ambient temperature.  If you can keep that below 40 degrees Celcius, or whatever the equipment manufacturers specify for a miximum temperature, that's the most cost-effective way to keep the place within limits.

Glen Kippel
KHCS
Palm Desert, CA