Well as you know current power generator technology for the most part uses a heat source (burning coal, nuclear reactor, etc.) to produce steam from water, this

Well as you know current power generator technology for the most part uses a heat source (burning coal, nuclear reactor, etc.) to produce steam from water, this pressure difference is used to drive a generator which turns the rotational energy of the turbine into electrical energy. Thermo-electric devices like thermocouples and thermopiles convert heat energy directly into electrical energy.