I got "Thermoelectric Peltier Refrigeration Cooling System Kit Cooler fan" which has peltier and two heatsinks and two fans.

"12VDC 6A Power is need,but not include in this Kit"

If i give it less power 5V ?A or 12V 3A then does it still work but it cools less?

 

12V@6amp is 72W power, so using a lower voltage will give lower Wattage output, and won't get cooler.

 

Hi,

I think they work from about 2v or maybe 3v and up to the max spec for that unit.

Yes you get less transfer of heat and thus less cooling with less current (which comes from less voltage).

You might have to upgrade the fans also to get better transfer of heat from heatsink to air or from air to heatsink.

 

You don't want to use the 12V supply that is not rated to 6A or more. The TEC will be too big a load on it. The TEC will draw current roughly in proportion to the voltage, so a 5V supply will need to be rated to at least 5/12*6A = 2.5A.

Operation below maximum power isn't bad. The TEC will be more efficient (more heat moved from cold side to hot side per unit of electrical energy consumed). The downside is that the cold side will not be able to get as cold, and the absolute amount of heat moved from side to side will be less than the maximum. The ∆T that the module can generate is related to the current consumed. So the heatsink and fan might be able to get the hot side near to ambient, but the cold side will only get so cold.

 

I'm planning to make refrigerator for me.

What that 5/ means in your answer?

Only heavy duty power supplys i have found here are meant to be used in computer towers:

Chieftec GPA-400S8 400W (Output: +5V - 18 A, +3.3V - 22 A, +12V1 - 18 A, +12V2 - 17 A, -12V - 0.3 A, +5VSB - 2.5 A)
Cooler Master B500 v2
CORSAIR PSU VS Series 350W (max 5A) (+3.3V - 14 A+5V - 14 A+12V - 25 A-12V - 0.3 A+5VSB - 2.5 A).

Is it possible to use two power supplys wired together parallel/serial/?: 12V 2-3A + 12V 3A. I have 12V 2-3A power supplies i could use.

This is the peltier. It's made by HXS. Can't find any specs other than "12VDC 6A Power is need,but not include in this Kit:
http://www.dhgate.com/product/wholesale-thermoelectric-peltier-refrigeration/241529265.html

 

The Corsair atx on the 12V rail is rated @25amp,,,the Cheiftec is 17amp on the +12V1 rail,, no problem with either on their own.

 

Can this output simultaneously 3.3V 20A, 5V 20A and 12V 38A? So i could use this power supply to power my Raspberry/Arduino projects too??

AC INPUT200-240Vac 5A 47-63Hz
DC OUTPUT +3.3V +5V +12V -12V +5Vsb
20A 20A 38A 0.3A 2.5A
MAX. POWER 120W 456W 3.6W 12.5W
500W

 

Yes upto 500w total.

 

What that 5/ means in your answer?

I meant that supplying the module 5V instead of 12V will cause it to draw roughly 5V/12V x 6A = 2.5A.

It will also be more efficient and the heat removal system will be more likely to remove the (lower) heat produced. The only negative is that it will not reach as low a temperature on the cold side.

 

I'm going to buy one of those power supplies.

Can i connect multiple devices like Raspberry etc to single 5V rail/wire?

Or refrigerator and some other 12V stuff to one 12V rail?

 

I'm going to buy one of those power supplies.

Can i connect multiple devices like Raspberry etc to single 5V rail/wire?

Or refrigerator and some other 12V stuff to one 12V rail?

Yes, as long as the total load does not exceed the amperage rating of the power supply. Some devices may be sensitive noise on the power supply, and large switching loads can cause noise to be seen by other devices on the same power. So, if you know something is sensitive, you might want to help it isolate itself.

 

I got Chieftec GPA-400S8 400W and i have old BlueWalker VI 1200 IEC UPS.

Is it okay to connect this power supply to this UPS?

• 1200VA / 600W Line-Interactive UPS
• C14 Input, 6x IEC C13 Outlet
• Batteries included: 2x 12V/7Ah