Homemade chiller in the making

[destroyer125]

I got a 1/3 hp electric fan motor, runs really good, think it would be possible to connect it to a corrosive pump head?





Im thinking of making the coil longer, and have it go down in a small tub that will have water, making a heat sink which will help cool down the pipes as the acid circulates

[sage]

I'm not sure how much heat the anodizing is going to create, and how fast, but I'd be wondering how much heat the fridge can pull out of it's interior and how fast. The small fridges really don't generate many BTU's per hour. They depend on the small sealed container and lots of time. Your always going to be fighting the air to either water or plastic transfer inefficiency problem.
If I were doing it I'd find the coling coil in the fridge, pull it out, and put it in the same bucket with the water and the plastic pipe. Then you have water to water contact between the cooling coil and the plastic pipe. You'd have to put the thermostat tube in the water too. That's the best you'll do there then it's up to just how much cold the cooling coil can generate.

Sage

[destroyer125]

Ive pulled the back off, and didnt find a coil, I didnt tear it completely apart though, Im hoping as long as the fridge can keep 2 gallons of water cold inside it, it will be able to handle the load. The water should be able to disapate the heat alittle better then just bare pipes

[acidrain]

That is a lot like the one I made. When sitting idle, the acid in the tubing gets nice and cold,. Then, when when you turn on the pump, it will cool my tank approx 2deg F, but then stalls at cooling it further. If you can fit all that tubing into a tank of water that also fits inside the fridge, it would probably pull the heat out of the tubing a little better than just the air.
Also, using 2in. rigid insulation around the ano tank, and sealing the enclosure as best you can helps a lot at holding the temp down when not in use.
lOOK'N GOOD!

[destroyer125]

I Plan to build a box soon for it, all my funds currently are going into a pump. I lost a Corrosive little giant pump earlier on ebay by 10 seconds and $1

im also experimenting with putting 2 gallons of acid in the fridge, cooling it down overnight, then using it, not sure how much of a dent it will put in a 30 gallon tank


this doesnt have a highly corrosive head on it,anyone think it will hold up? http://cgi.ebay.com/ws/eBayISAPI.dll...e=STRK:MEWA:IT

[acidrain]

That is actually a REALLY good idea!

[destroyer125]

I think im going to need more then 2 gallons, this tiny fridge only holds 2 gallons, 3 if you sit one in sideways

[jrow]

Question from a non plater!
Wouldn't soft copper tubing work better than the PVC? I would think it transfer cold better that the PVC. Then again I don't know whether that ANO acid would effect the copper. Just a thought.

John

[destroyer125]

copper and acid dont go together, but titanium pipe would work, but man that would be pricey

Also I tried the 2 gallons of chilled acid, droped it 4 degree's

[cameraman]

Definitely you'll want to immerse the fluid coil. It would be ideal to do as sage suggested but it would be a pretty big project; I don't think you'd be able to move the refrigerator coil without dismantling it, then you'd have to vacuum and recharge it once you got it all back together.

This is going to make it a bit more complicated, but if you could do a second recirculation system to pump the chilling water into a radiator in front of the refrigerator's interior fan, you'd increase your efficiency quite a bit. You could also put an aquarium air pump inside the fridge and run an air tube or three into the water, terminated with air stones. The idea is to expose as much surface area of the chilling water to the chilled air. I'm not sure how well the air pump's rubber diaphragm is going to perform at the low temperature - if you could find one that uses a silicon diaphragm that would be better.