Essential Question: Which Peltier is the most Efficient for reaching coolest temperature, and is the 6V 2A peltier inefficient?
I was looking into more efficient Peltiers for my project and tried to test the amperages of certain Peltiers on a 5V power supply.
Here are the results I have up with:
Using a 5V power supply,
- TEC-12704 (12V 4A standard draw) drew 5V 1.4A.
- Peltier TEC-12705 (12V 5A standard draw) drew 5V 1.36A.
I don't understand how a Peltier rated higher than the previously mentioned runs at a lower power, and furthermore, when converting 12V -> 5V current output using ratios, (12V/5A = 5V/XA, where a 12V 5A Peltier should draw 5V 2.083 Amps? Why is this happening!
- Lastly, I tested a 6V 2A Peltier which ran at 5V 2.2 Amps, more amperage at a lower voltage? - so does that mean this is inefficient compared to the last 2 Peltiers?
Currently I am using the 6V 2A Peltier, trying to find a more efficient Peltier and need to figure out: are these weird numbers due to one Peltier being more efficient than the other (critical to my project) or something else?