Thoughts about my glycol chiller?

[kast1k]

f I'm in the wrong place please correct me as I'm new here.
I'm looking to build a moderately effective chiller so I can keep my fermenters in my garage. I've been poking around for days and I'd like to keep costs down to by other fun stuff. I'm sure this has been done before but I'll write it out and would love feedback:

1) fountain pump stuck into cornelius keg with the power cable pushed thru the gas relief fitting and sealed
2) cable wired to a temp. Controller with probe in the thermowell
3)output side of pump fitted to stem in corny.
4)hoses with fittings plumbed to copper coil ( copper flattened to ovalescent for extra surface area and wrapped around fermenter)
5) corny filled to capacity with propylene glycol and laid into freezer section of kegerator to push it down below freezing temp.

Hopefully that write out flowed well enough to paint a picture of what I'm trying to accomplish. Like I said, I'm sure it's been done but I'm curious to hear about any thoughts.

 

[augiedoggy]

I believe an old window air conditioner or dehumidifier taken partially apart and having its coil placed inside a cooler of glycol has been proven to be a much more effective and efficient design... Not sure if its something you may want to consider or not but the bucket or container of water with a pump in a freezer of fridge works just not effectively as an actual chiller from what Ive read.. many tried it for aquariums too with weak results.

im actually waiting on 100ft of stainless coil I scored for $60 on ebay so I can make coils to mount inside some conicals. I use a "cool zone" cooling jacket for one now and it works well but its pricey ($70
+ shipping.) and I just added more fermenters.

 

[kast1k]

I believe an old window air conditioner or dehumidifier taken partially apart and having its coil placed inside a cooler of glycol has been proven to be a much more effective and efficient design... Not sure if its something you may want to consider or not but the bucket or container of water with a pump in a freezer of fridge works just not effectively as an actual chiller from what Ive read.. many tried it for aquariums too with weak results.

im actually waiting on 100ft of stainless coil I scored for $60 on ebay so I can make coils to mount inside some conicals. I use a "cool zone" cooling jacket for one now and it works well but its pricey ($70
+ shipping.) and I just added more fermenters.

Cool, thanks for the response. My biggest issue right now is fermentation temperature. Ideally, I'd like to ferment in an unfinished garage where I brew, and the temperature Flux is too much.
I thought the corny/freezer chiller would be capable of creating a pretty big differential even without some sort of heat sync in the system.
I've also been considering building a chamber with a window mount A/C unit capable of fitting several 1/2bbl conicals. That's a pretty big step, but the direction I'm heading.
I guess I was hoping to see if anyone has made a working chiller using the freezer from their kegerator and glycol lines.

 

[kast1k]

I believe an old window air conditioner or dehumidifier taken partially apart and having its coil placed inside a cooler of glycol has been proven to be a much more effective and efficient design... Not sure if its something you may want to consider or not but the bucket or container of water with a pump in a freezer of fridge works just not effectively as an actual chiller from what Ive read.. many tried it for aquariums too with weak results.

im actually waiting on 100ft of stainless coil I scored for $60 on ebay so I can make coils to mount inside some conicals. I use a "cool zone" cooling jacket for one now and it works well but its pricey ($70
+ shipping.) and I just added more fermenters.

Cool, thanks for the response. My biggest issue right now is fermentation temperature. Ideally, I'd like to ferment in an unfinished garage where I brew, and the temperature Flux is too much.
I thought the corny/freezer chiller would be capable of creating a pretty big differential even without some sort of heat sync in the system.
I've also been considering building a chamber with a window mount A/C unit capable of fitting several 1/2bbl conicals. That's a pretty big step, but the direction I'm heading.
I guess I was hoping to see if anyone has made a working chiller using the freezer from their kegerator and glycol lines.