Humidity Re: <VV> Re: GARAGE IDEAS

[Jim Burkhard]

Ken -

You can't do it the way you suggest if you are measuring RELATIVE 
humidity.  Cold air holds less moisture less well than hotter air so 
50% RH cold air contains a WHOLE LOT less water than 50% RH warm air. 
  If you control your fans off of RH, you will have cold drier air 
outside at night often but not run the fan because the RH is higher 
outside.  The reverse error is true as well... To do what you are 
suggesting, the system should run on ABSOLUTE humidity, not RELATIVE 
humidity...

Jim "pull out those steam tables" Burkhard


> In a message dated 8/12/2007 9:59:27 AM Eastern Daylight Time,  
> deltainc at grm.net writes:
> 
> Of  course, kinda like cooling a corvair ....... if you gauge the inside  and
> outside humidity, you might find that over a day or three, you have  a  "
> relatively dryer spell" outside ... then you can just blow with a  big (
> centrifugal fan so you can pretend its a vair turbocharger ... these  big
> mommas can be bought used from Iowa corn dryer farmer ... mine is a 5  or 10
> horse unit for our 3200 sq ft shop ... sounds like a tornado, and  will
> exchange all the air in about 2 minutes ..... ) fan ... ie, blow the  moist
> er air out and suck in some dry er air ... no need to condense it or  run it
> over expensive ice tubes or whatever .... just get rid of it and let  it
> water your lawn or something .
> 
> to be neater yet, buy an obsolete  ( last year model ) PC for $50, to do this
> with ... maybe a cheapo PLC with  all those yes/no inputs and electrical
> output relays to play with ... ebay  for almost free for a 15 year old one
> .... and set up a Magic Climate  Control system to amaze your friends ... how
> else are you gonn " one-up "  the Lone Haranguer etc. with his Garage Mahal
> ...
> 
> Just think:  program:
> If inside humididity is higher than outside humidididy, turn on  fan.
> If inside H is same or less than than outside H, turn off fan.
> If  inside H reaches [ panic setting here ], turn on inside  air fans to  get
> moisture into air, then dehydrator system ON.  Catch this pure  water in a
> little jar to put in your concourse Vair battery.
> 
> If time  is 1200<>1700 hrs  am , and [ incremented time ] turn on  garage
> lights for 2 mins and then turn off then increment turn on time x  hours to
> confuse burglar spotters ...
> 
> such fun, oh, I guess it could  also wash and wax your vair ....
> 
> As you might remember, I have been  advocating on the vair to just blow the
> hot air out of the car; " wee don'  need no steenkin' compressor fan ... "
> corollary::  MORE FINS= less  fan power needed ...
> 
> reargards, ken campbell,  deltawerkes
> 
> 
> 
> 
> 
> 
> 
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