# Peltier Heat Generation and Dissipation

Trying to retrofit an old Peltier wine cooler and I a question about the wattage and heat calculations.

If I have a 12V power source (switched) so the maximum Wattage it can convert to heat is (105W)

If I were to connect some sort of cooling system capable of dissipating 120W of heat (such as a CPU cooler)

Would that be adequate heat removal to allow the cool side to continue to decrease the temperature to below ambient? Or have I oversimplified the heat movement calculations too far?

simulate this circuit – Schematic created using CircuitLab

• Sorry if i have missed something obvious it's been years since my last Electrical Engineering class. May 15, 2020 at 3:57
• A cooler is rated in degrees rise per Watt at rated power. So if eg tour cooler was capable of 1 C/W at 120 W then rise would be 120 C above ambient. Not good in this case. May 15, 2020 at 4:33
• The cooler also has to remove more than just the power you're applying since the TEC pumps energy from the cold side to the hot side. May 15, 2020 at 5:06