The following typical specifications of a Peltier element would help in sizing the power supply.

1. Model number: TEC1-12706
2. Operating Voltage: 12V
3. Maximum Voltage Umax (V) : 15.4V
4. Maximum Current Imax (A) : 6A
5. Maximum Power: 92 W

Exceeding the maximum ratings would damage the element (15.4 x 6 = 92.4).

A study of the performance specifications shows that the Peltier element behaves like a resistor with a positive temperature coefficient.

View attachment 248561

The graphs show only a marginal influence of hot / cold side temperatures (∆ T) on the current consumption (4.5 A at 12 V).

The calculated value is = (12 / 15.4) * 6 = 4.68 A.

It would not be wrong to conclude that a regulated 12 V DC 6A power supply would be more than ample to power the module as well as the cooling fan.

Nandu.

Assuming the module is rated for 6A continuous, and is actually capable of supplying it's rated power. Many small and cheap modules are not able to supply their rated current continuously. Some not at all. It's worth pointing that out.

 

Assuming the module is rated for 6A continuous, and is actually capable of supplying it's rated power. Many small and cheap modules are not able to supply their rated current continuously. Some not at all. It's worth pointing that out.

Certainly, @Travm.

Nandu.