[A6 Grower]

These $20 pumps are working just fine for me

https://www.harborfreight.com/merchan...ump-68395.html

[Chonkski]

Thanks again A6!

I got an idea, let me know what you think. I want to try using a large stockpot(s) filled with glycol for my coil, placed inside of the freezer. Then, I want to fill the freezer with water which will freeze around the stock pot. Am I making sense? Lol

I figure that will save a lot of glycol. You see any problems wth efficiency doing this?

Will the ice being around the stock pot limit the glycol temperature closer to 30°f?

[A6 Grower]

It might work but i could see after a long day of running that glycol being warm and the ice barley cooling it. I noticed a HUGE increase in stable temps once i stopped being cheap and just filled the whole freezer and got some pumps pumping the glycol around so it was in direct contact with the freezers cooling coils on the side. You cant really create that big of a "cold well" i think its called, in a chest freezer. And ice does not transfer cold too well and it's only like 28F-34F when there's water melting around those pots. Also it will probably take 2 days to get down to the coldest the glycol will go. Should be around -10F to 0F, its colder towards the bottom im sure. I need a temp probe instead or an ir gun. I can tell the freezer isn't running in the morning when i come in but its start to run after about an hour of running and then runs all day. Poor freezers sides get kinda warm but its keeping up better than i expected.

Also i feel like most of the cooling coils for the freezer are up towards the top so not filling the freezer isn't to efficient

[Chonkski]

Originally Posted by A6 Grower

It might work but i could see after a long day of running that glycol being warm and the ice barley cooling it. I noticed a HUGE increase in stable temps once i stopped being cheap and just filled the whole freezer and got some pumps pumping the glycol around so it was in direct contact with the freezers cooling coils on the side. You cant really create that big of a "cold well" i think its called, in a chest freezer. And ice does not transfer cold too well and it's only like 28F-34F when there's water melting around those pots. Also it will probably take 2 days to get down to the coldest the glycol will go. Should be around -10F to 0F, its colder towards the bottom im sure. I need a temp probe instead or an ir gun. I can tell the freezer isn't running in the morning when i come in but its start to run after about an hour of running and then runs all day. Poor freezers sides get kinda warm but its keeping up better than i expected.

Also i feel like most of the cooling coils for the freezer are up towards the top so not filling the freezer isn't to efficient

Point taken, and I'm gonna need a lot more glycol.

[A6 Grower]

Cheap cheap glycol

[A6 Grower]

If you really want to save on glycol chuck a few gallon jugs of water in there to take up space..

[WaterFarmFan]

Originally Posted by A6 Grower

I wish i would have just did like making chest Freezer Kegerator Like i attached. I drilled through the lid and just ran hoses through. Its still doing awesome. Its warm here so my ambient temp is like 85 to 90 so its only been holding~ -10f. This would be better and i would definitely recommend it. Get some cheap 250gph+ mag driven pumps (fountain pumps) from harbor freight for super cheap to move the glycol around to keep it a liquid and keep it colder.... A cart with wheels wouldn't be a bad idea either... Its VERY heavy full lol.. Dont go more water then 50% id stay around 25% water actually.

As to your pumps, itll be just fine. Im wishing i went with 50' 1/4" coils or 25' 3/8" instead of the 50' 3/8". Its over kill, especially if i only use one pump lol. Possibly slower than just icing the tank but of course easier and cheaper. Separate coils for each pump is a better idea too, Id to 2 - 25' with one in the center of the other only like an inch or two smaller. I have a fountain pump in the center of all my coils push glycol up to the surface and making it "flum" like you do when brewing teas for growing. Your tr21 should be faster, are you using two? Im sure 25' 3/8" would be plenty of coil for cooling. My tank gets colder as the day goes on, I start with 30psi and the coils cool the incoming butane so much that i end the day with 20psi

Would RV Antifreeze work to fill up the chest freezer?

https://www.homedepot.com/p/DOWFROST-...7005/202530435

WFF

[HWY36]

Originally Posted by WaterFarmFan

Would RV Antifreeze work to fill up the chest freezer?

https://www.homedepot.com/p/DOWFROST...7005/202530435

WFF

Can anyone answer waterfarman's question? I have this heat exchanger (https://bhogart.com/wp-content/uploa...et-Ver-1.0.pdf) from Bhogart. It is only rated down to 32F but I don't need to go much colder than that. Anyone see any issues using this type of glycol with this heat exchanger? Thx in advance.

[Gray Wolf]

Originally Posted by WaterFarmFan

Would RV Antifreeze work to fill up the chest freezer?

https://www.homedepot.com/p/DOWFROST...7005/202530435

WFF

Ethylene glycol works to about -40C but gets pretty thick. Propylene glycol will go to -60C.

https://www.engineeringtoolbox.com/ethylene-glycol-d_146.html

[WaterFarmFan]

Originally Posted by HWY36

Can anyone answer waterfarman's question? I have this heat exchanger (https://bhogart.com/wp-content/uploa...et-Ver-1.0.pdf) from Bhogart. It is only rated down to 32F but I don't need to go much colder than that. Anyone see any issues using this type of glycol with this heat exchanger? Thx in advance.

I decided to get 100% Propylene glycol for my application. RV Antifreeze has a freeze point of 8F, but reports stated that freezes at a slightly higher. The MSDS for the RV Antifreeze states it as:

Propylene Glycol - 25-30%
Water - 64-70%
Glycerol - 4.0-5 mg/m3
DiPotassium Phosphate - 0.5-1%

I think the RV fluid work perfectly fine for your application, but so would 100% PG, which is probably a bit more food safe for incidental contact. Filling up a chest freezer takes at least 20-25 gallons, which is quite expensive. I would say get 100% Propylene glycol and then cut it yourself with water to get the temp range that you want.

WFF