Here is a Peltier effect module
The delta t ° C, temperature difference of this module is 67 ° C
This model sandwiches a Peltier module into a heatsink and a plate
15 V 4 A maximum continuous: the direction of the current determines the hottest side
By keeping the surface hot at room temperature via the aluminum heat exchanger
Side heatsink low (if well sized) and 67 ° C from - opposite
Theoretically one should go below 0 ° C on the cold side
Before power on, laser measurement of temperature: 26.5 ° C
A few seconds after switching on, already more than 19 ° C
27 ° C on the hot
12 ° C on the cold side, 30 ° C on the hot side after 30 s ...
1 min. After total: 7.5 ° C
Although the time of the aperitif is close one does not reach 0 ° C :-(!
By reversing the direction of the current the cold side changes rapidly from -5 ° C to over 35 ° C!