Efficient use of Air conditioner
"tom" wrote in message
om...
Can not convince wife about two things. Just want to bring it here for
a serious judgement:
1. Use Air conditioner for home at night:
Temperature outside = 69F, Temp in home = 81F,
Air conditioner trigger set to 75F
method A. With windows being open - My way
method B. With windows being closed - Wife's way
Question: which one make house temp drop faster and which one costs
less electricity?
2. Use AC for car in a hot summer day
Temperature outside = 80F,
Temp of a car parked in sun for one hour = very hot, don't know
exact temp
After getting into the car
Method A: open windows, drive for a moment then close the windows
and start AC. - mine
Method B: Start AC right away without opening windows. - wife's
Question: which one make car temp drop faster and which one costs
less electricity?
Thanks!
-Tom
1 - this depends upon the temperature Vs time profile, A and B are good
strategies with certain profiles.
you also need the humidity levels/profile, as air that is cooler but has a
lot of moister causes the AC to run longer to remove the water. If you have
30% humidity, widows open, 80%, windows closed. Look up latent heat.
2.- Method A. Get that superheated air out (140F) and start with 80F
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