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Originally Posted by Gadget470
I know it's been a long time since I have posted, mostly because I've chosen not to go into Engineering. But I came across an interesting news article that sparked some interest.
Google searching left me to no avail..
The article was about 3 Frat boys that are inventing a "Keg Wrap", an electric cooling blanket for kegs. While the use isn't the interesting thing to me, the technology is.
We all know to create heat with electricity, you must cause resistance in the current. But how, without fans, would it be possible to remove heat?
Long time no see, I'll be back for more..
Gadget
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Heat removal is done by expanding a gas. This is how refrigerators and air conditioners work. You put gas into a cylinder and then pull back on a piston (like the opposite of what a compressor does). The expansion of the gas causes the temperature of the gas to drop. If you remember the ideal gas law from chemistry class, you can see the relationship.