Peltier thermoelectric module Help

[Crosslhs82x2]

Hi
I'am looking for someone that has knowledge about Peltier tec1 modules.
Watching videos on youtube shows these modules when setup with a cpu heatsink / fan on the hot side, the cold side can get down to -20c plus or -4f plus.
I was thinking of doing that setup but also on the cold side add a radiator style heatsink for cooling about 1/8 gallon of water in a continuos loop.
Does anybody have experience with this?

 

[kanewolf]

The biggest problem with lower than ambient cooling is always condensation.

 

[geofelt]

What is your objective?
What cpu are we looking at?

 

[Crosslhs82x2]

Thank you for responding.
This won't be used in any of my cpu's so that won't be a issue.
Seeking info if setup in that way it could keep the water temp cold if i used a rad/heatsink in sizes upto 40mmx40mmx12mm
40mmx80mmx12mm
40mmx120mmx12mm
40mmx200mmx12mm
To keep the 1/8 gallon of water cold.
So using the right module vs right tank size for a chilling tank in a constant loop.
With using the larger tanks i could use 2 of the modules if needed.
But would a single module on a large tank keep the water in long enough to help supply cold water moving through 39ft of copper tubing.?
Thats where in can use module setup info ank tank info.

 

[geofelt]

I can't really help you; I have no experience with such units.

I think you are going to have to experiment with this.
How cold you can keep a tank of water will depend on many things such as ambient temperature and the particular characteristics of the peltier units.
The units are going to generate heat which must be removed from the vicinity of the tank.

Is this just an experiment, or do you have an application in mind?

 

[Crosslhs82x2]

It involes a 24in blade industrial fan 39ft of3/8 copper tubing coiled up on the front fan grill, a fish tank pump that can run upto 660 gph (not all gph needed)
Just the strength of it to get the water moving through.
a corsair h60 or the stock fx-8350 wraith i have both plus fx-6350
The peltier, a radiator heatsink tank style upto 200mm is what i can get,
Amd retention bracket/backplate
Sandwich the pelt between the hot cooler and the rad heatsink then the backplate all held together with longer screws and nuts.
Could this work?
I have been using ice water but it doesn't last long.
Last week i put in 2-10lb blocks of ice and 5lbs of dry ice it was gone in 2 hrs.

My apt is 2 bdrms only the living rm and kitchen stay liveable while the bdrms get nothing from the regular ac unit while paying upto $275.00 a month for elec bill.

Atleast now with that big fan i can move air around. It moves 2800cf low and 4000cf on high so any heat generated could just go through the fan?

 

[ohenryy]

Well, the ones I used they wouldn't shut down, they would kinda "melt" and have some broken / non working areas of the Peltier after.
It's good fun, but unless you have a really good aircooling with low amb temp. (most likely you need to use watercooling).

 

[geofelt]

I gather that your objective is a cooler room.
To that end, a peltier setup is a losing proposition.
The cooling generated on the cold side will be offset by the heat generated on the warm side. Plus some since nothing is 100% efficient.
Unless you have a way to discharge heat to the outside of your rooms, you will just be heating it up more.
A/C units try to be efficient.
Perhaps you might rig a duct to direct the A/C output to the bedrooms while you sleep.


Your best bet would be to change out your old/obsolete FX-8350 and FX-6350 based units.
Under load, they can consume upwards of 250w each.

A inexpensive current 8th gen intel processor will perform better at a fraction of the heat generated.

 

[Crosslhs82x2]

Thanks all for the input

So Peltiers are out if i cant exhaust the heat directly outside the apt not just in the room.
Having thoughts now of buying a small used freezer at garage sale / off craigslist / what ever i can find and make a copper coil inside a maybe a 5 gallon bucket. Add a radiator and fans inside the freezer. Rad and fans being prechill for water coming back in then through main coil.
Put the bucket in freezer drill holes for my lines in side of freezer
Start filling bucket with water 1/8 to 1/4 at a time letting each layier freeze
When the bucket is solid ice start the slow loop.

I need to do something because just moving to a new apt is out of the question apts in Denver prices have gone way up plus the fact of first and last month and landlords are wanting you to make 3 times the amount of what your rent would be.
And going to portable ac units well that would be 3 ac units going and the electric.
I know this topic is a strange 1 for TH
It is still dealing with some computer parts and water cooling process's.

Thanks again to all
If anyone has more ideas please contribute.
Until then sitting at my pc in my skibby's in a pool of sweat!!!!!

 

[geofelt]

Even a freezer transfers heat from the inside to the outside.
Basic laws of thermodynamics.
You will be hotter.

Buy a house fan and use it to send some of the cooler output air from the A/C unit to the room you are in.

If you sweat, that is good, a fan on your body will cool you down.

a/c units will aggravate the situation unless you can send the hot air they produce out of the room.
Ice works because the ice absorbs heat which is want causes it to melt.

If you have a outside window that can accommodate another A/C unit, that will work.
Of course at the cost of assed electricity bills.

 

[Crosslhs82x2]

Been using the smaller turbo fans pointed into the rooms.
this is a 2nd floor apt.
The windows slide sideways. In my son's room a ac unit out the window would partly obstruct the main walkway.
The master bdrm window would require a big ladder for any bracket or bracing.
The industrial fan i have moves 2800cf on low 4000cf on high.
The problem with that is like tower cooling you can only fill the case/room with what you can get out.
There is a attic but no vents out from what i can see, so i don't think that is a option either.
Where i saw the idea of the peltier is on adafruit.com seeing the cold side put frost on in open air in minutes is why i was asking for more info if i could use a tank style heat sink to pump water through it to my copper lines.
Not realizing and still not knowing just how much heat the hot side puts out.
If it like having the oven set at 400 then yes thats way to hot but if it as hot as my fx-8350 @ 4.5 gig and stress test with occt running it gets to 46c or 114 deg hot then it is on it's way of being acceptable given the fact of the amount of air being move by that huge fan.

 

[geofelt]

Look into what is called a portable AC unit.
It will need a vent to exhaust the heat outside.
Here is an example.
https://www.amazon.com/EdgeStar-AP12000S-Portable-Conditioner-Dehumidifier/dp/B0018DSBKE/ref=sr_1_11?s=home-garden&ie=UTF8&qid=1527649553&sr=1-11&refinements=p_72%3A1248915011#customerReviews

 

[DSzymborski]

I'd investigate why I'm using so much power. The state that I live in has just about identical electric prices to Ohio and I've never hit $300 a month. And that's with 2500 square feet and keeping the central a/c set to 71 all summer. Plus, I usually work from home, so stuff is always running and I have five televisions on my office wall (I'm a baseball writer, not some deranged TV junkie, there's a reason). Unless that's the figure for all the utilities, hitting $275 in your situation sounds obscene.

 

[Crosslhs82x2]

That is just for electric bill.
The unit is only 2 yrs old.
When set at 70 degs it run 24/7 and we have to shut it off to give it a break.
The old 1 done the same thing.
Well thanks for the help and opions guys i'll figure somthing out.