Peltier Cooling: Heat Transfer & Electron Theory

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The cooling effect in Peltier cooling occurs due to the movement of electrons between two different metals, where one side absorbs heat and the other side releases it. This phenomenon is linked to the thermoelectric effect, which explains how electrical energy can be converted to thermal energy and vice versa. The heat transfer happens because electrons move from the hot side to the cold side, carrying energy with them. The reason one side gets hot while the other cools is due to the specific properties of the materials involved and their electron configurations. Understanding these principles clarifies the mechanics behind Peltier cooling systems.
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When the heat gets transferred to one side and the other side gets cold , what causes this cooling effect , why does the heat go from one side to the other on the different metals ,
does this have something to do with the electrons.
 
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I read that before I posted this , what doesn't make sense to me is that why does one get hot and one get cold , why don’t they both get hot , just one hotter than the other.
 

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