Cheap Air Conditioning

[Edgedamage]

http://www.eng.uwaterloo.ca/~gmilburn/ac/

[Havok]

And if you need cheap hot air - just listen to Mr C.

 

[JackTucky]

That's a pretty cool idea.

I had this "room air conditioner" once.  It blew air over water (that was put in a resevoir) that was in a paper membrane.  It came out cold.

It said it only worked in rooms that were already air conditioned, it just lowered the temperature.  It worked great.

Now that I think of it, it's just a humidifier.

This device this guy built doesn't remove the humidity from the air when it cools it like a real A/c unit does through the condensation pump.  So if he's cooling the air, everything in his house should be damp, no?

Jacktucky

[hypernova]

And if you need cheap hot air - just listen to Mr C.

Note he said cheap, not free.  You have to spend your time.

[crashwg]

Just put something similar together at work for the "glove box" which is basically a box that we run argon/helium thru while welding tungsten.

It was just a heat exchanger from the autoparts store and a 120mm fan.

If you wanted to get fancier with the setup Edgedamage posted you could use a full sized radiator... 

Wow, I just had a pretty sweet idea.  The inlaws have a well that has a pretty decent runoff.  They could easily hook onto that, make a loop that goes into the house, thru a radiator or three setup at various points of the house with a fan behind em, then back out to wherever it is that the water goes now.  Heck they could hook a generater to the water output and power the fans with that!