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TEC Chill Box Chamber Build log - Page 10

post #91 of 1665
Thread Starter 
the wire on this build, I went with 10AWG, why 10AWG?
the load on the wire system to each TEC is right at or above 20A, and that is a lot of power, so much power that things get hot with 20A's flowing through them, but with 10AWG wire connecting it all, at least the wire stays cool at this point.
one might have noticed that I am seemingly going a little extreme with this build, and for the most part over building the rig, or using more than I have to.
the reality is this is not the normal build, and as a result of the fact that this build is extreme, so to are the components needed for it.

could I build it with 16AWG wire? yes and my test build was made with 16AWG wire, it worked, but the wire would get hot, and I could see that in time it would cause issues.
could I have built it with 12AWG wire? well 12AWG wire is rated to handle 20A 24/7, so it should work fine, but I did not like the idea of running the 20AWG wire at its MAX amp rating all the time.
post #92 of 1665
Thread Starter 
what I am working on
http://imgur.com/a/35tum
post #93 of 1665
Thread Starter 
Quote:
Originally Posted by whk0 View Post

If these relay get hot within rated current, that indicate high resistance on contact (cheap?), you can try to measure between pin 30 and 87 when relay is energized, an ideal contact should read 0v (not going to happen) higher the voltage drop, hotter it gets. You can try to use 2 relay wire in parallel to share the load current see if that helps. Also are you sure those snapping noise are from TEC and not from the power supply itself?

Also are you sure those snapping noise are from TEC and not from the power supply itself? no I don't know for sure where it was coming from, but I do know that the circuit should not be making a snapping sound, and the relays did stop it, so I really did not dig into it.
I assumed it was the TEC.
Edited by toolmaker03 - 1/16/16 at 9:04pm
post #94 of 1665
Quote:
Originally Posted by toolmaker03 View Post

quote name="whk0" url="/t/1584867/tec-vacuum-chamber-build-log/70#post_24784496"]If these relay get hot within rated current, that indicate high resistance on contact (cheap?), you can try to measure between pin 30 and 87 when relay is energized, an ideal contact should read 0v (not going to happen) higher the voltage drop, hotter it gets. You can try to use 2 relay wire in parallel to share the load current see if that helps. Also are you sure those snapping noise are from TEC and not from the power supply itself?

Heres what I want to say about it.
I thought relays only go hot with higher currents. You can put 10V and 220V through it. As long as the current is the same, stress on the relay is the same.

I also thought that cheap relays are just lesser quality. The main heat generated I reckon will be from the thinn wires inside connecting.

If the resistance is too high on contact we will get arcking happening and the voltage can be harmfull for the stabibility of operating compoennts

[quote name="toolmaker03" url="/t/1584867/tec-vacuum-chamber-build-log/90#post_24797609"
could I have built it with 12AWG wire? well 12AWG wire is rated to handle 20A 24/7, so it should work fine, but I did not like the idea of running the 20AWG wire at its MAX amp rating all the time.[/quote]

It is possible to run 100amps with a wire that is as thick as hair.
As the shorter the length of the wire the more amps it can give out.
The wire would be so short that it is possibliy not visible to a human eye biggrin.gif
Edited by Iwamotto Tetsuz - 1/15/16 at 11:22am
post #95 of 1665
Thread Starter 


it just fits. biggrin.gif
http://imgur.com/a/Zthdg
Edited by toolmaker03 - 1/15/16 at 7:54pm
post #96 of 1665
Thread Starter 
so as you can see there is no room in the chest to be making tubing connections or wire connections.

so I have to connect all the motherboard wires then connect the video card power wires, attach the fans to the PC case, then attach the reservoirs to the PC case, and then I can connect all the soft copper tubing connections, from the video cards to the reservoirs, then I have to place all of that, the PC case, and reservoirs with the tubing attached to it, and all the wiring, that is going into the chest, all of this is placed as a single unit. to do this as a single unit, I needed to drill the hole through the chest as a straight hole through the bottom of chest, at the 45 degree angle section of the bottom of the chest, where the drain plug used to be, this way the tubing can be run through the hole as a straight run, with the wire already running through the same hole, I will place the PC case and reservoirs in the chest, while it is laying down, and the lid open, and hole in the bottom of the chest will be at the top of the chest, after it is all in the chest, I can bend the soft copper tubing 90 degrees, so that I can sit the chest up and close the lid.

well that sounds a whole lot easier than it is.
Edited by toolmaker03 - 1/16/16 at 9:15pm
post #97 of 1665
Thread Starter 
ok the TEC PS's will have two + power wires attached to it, one wire goes to the switch, and one wire goes to the relay, there will be three - negative wires attached to the power supply, one wire to the switch, on wire to the relay, and one wire to the TEC.
it is a lot of wire this way, but the power system for the TEC's is more stable, now the relays stays cool to the touch, the wire does not heat up, and there are no snapping sounds coming from anywhere.
thumb.gif

so with a little redesign of the power system, I have fixed all the issues I had with my test build.
16AWG wire is to small and got hot.
straight wire to the TEC's from the power supply caused powering issues.
post #98 of 1665
Thread Starter 



well even with using a table top to attach everything to, it is still a tight fit for me to get all of the hardware on there.
http://imgur.com/a/WXOP0
post #99 of 1665
Theres a channeling piece for the 80MM fans thumb.gif I like it

I think theres a channeling piece for 12MM fans as well? How do they compare without?
post #100 of 1665
Thread Starter 
well they equal to about the same performance wise, but the 80mm fans spin up to 3500RPM's so they can get loud, and the 120mm fans are the quit series from corsair, so they only get to 1500RPM's but they also stay quit.

I like the corsair fans better but they also cost twice as much. its a give and take, its all a give and take tongue.gif
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