I am wondering if such a chemical/material exists which, upon triggering, becomes cold on one side and hot on the other in which after all the chemical bonds are broken/built (however it would work), and the chemical begins to move towards thermal equilibrium, it could be 'recharged' using electricity?
What I am investigating is an effect similar to that of the 'Peltier' effect in which one side of a semi-conducting material becomes very cold and the other side very hot! These devices are horribly inefficient though.