Posted by John T on April 21, 2009 at 14:28:43 from (66.244.97.31):
In Reply to: Re: 50mpg from brakes? posted by Janicholson on April 21, 2009 at 11:42:12:
Yo Jim, that brings back ancient memories in Thermo class concerning the gas equation Pv=nrT which has to do with refrigeration and heat of vaporization n all other sorts of neat mechanical/thermo which, as an electrical engineer, was NOT my best subject grrrrrrr
If pressure is increased, then temp goes up as you explained and if the compressed air inside the storage vessel/receiver cools down then the pressure must drop and its that stored pressure that can be used to do work.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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