I have this small wine-refrigerator that is both old and not working. I don’t really need it, but it’s nice to keep extra beers and wine in there.
My idea is to get a peltier cooler and convert this from a compressor cooler to a solid state cooler. Of course it won’t be as efficient or cold – but as long as it gets just a little bit cooler I will be happy.
I ordered some coolers online (they weren’t super expensive) and they seem to work. It requires 12 volts and up to 5 or 6 amps – so the power supply might be an issue (it seems many people use a computer ATX power supply). Actually, you can just connect it to a D-cell battery and put your fingers on each side of the cooler and easily feel a temperature difference (great for demos).
With a temporary power supply, I put the cold side of the peltier on a big aluminum block and then I put a cpu heat sink on the hot side. This didn’t work – but here is a picture.
It turns out that the peltier cooler gets hot – but it keeps a temperature difference between the two sides. So the key is to keep the hot side as cool as possible. With this in mind, I switched it so that the hot side was on the block and there was nothing on the cool side. I still didn’t work very well until I put some thermal paste between the peltier and the aluminum block for good thermal contact.
Here is what I get.
Pretty cool, right?
I will keep you updated.