Tired of all the heat, I started to figure out a way of cooling myself at work the cheapest way possible.
So, here is a basic instructable on how to build a small AC unit that only cost me 4€.
You will need:
- Small aquarium water pump
- Radiator from fridge;
- Plastic tubing
- Metal shears
- Brass or soft steel brush
Two coils (four rows of tubing) should be enough.
Cut the piece from the radiator, clean it up (inside with an air blower or some water and outside), bend it carefully lenghtwise in 2 or 3 and paint it.
Connect another piece of tubing to the radiator and leave it. This one is the discharge or return line.
Step 3: Finished!
If you can, seal the container in blue foam or other insulator to keep the ice from melting too fast.
Turn the pump on, place a fan behind the radiator and enjoy your cheap AC unit!
It works best this way as the air isn't restricted by all the wires of the radiator, but is still nicely cooled. Ducting the setup (fan + radiator) inside some blue foam would increase efficiency even more!
Also, get the side where the water gets inside the radiator opposite the fan (facing you), and the exit side near the fan.
This way, the air is progressively cooled; if it was turned th other way round, the cold air would loose its chill by trying to cool the warmer water circulating near the end of the radiator.
You can see the cardboard is wet, especially on the coolest intake coil, due to condensation of moisture from the surrounding air on the two photos.
Step 5: How It Works?
One may expect some condensation on the radiator if the environment is hot and humid.