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well, i am a little confused
but looking at the data, i think it worked ok!!
When I first installed the fan inside the tube and right next to the mirror, the mirror cooled at an average rate 1.743 degrees per hour with the ambient falling at an average of 2.00 degrees an hour. This was very linear in nature and there was no levelling off in this time frame of 4 hours.
With the newest setup, the ambient again was dropping a very linear rate of 1.855 degrees per hour and the mirror was cooling at a very impressive 2.073 degrees per hour.
The actual fan was turned over half way thru the test and went from sucking to blowing cooler air into the tube. No noticeable change in the rate of cooling was observed.
So at this stage it looks to be a winner, but i would prefer to observe normal cooling now that a hole is in the side of the tube near the mirror.
Tonight, i will cool for an hour and then turn on the fan.
It is very hot at the moment, so hopefully there is a large temp difference to run the test under. And then a nice levelling off to see how the fan lags the ambient temp
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