Thermoelectric power generator for variable thermal power source

A thermoelectric power generation system comprising:

• a thermoelectric generator having an input adapted to receive a varying thermal power from a thermal power source, and further having an output adapted to move waste heat from the thermoelectric generator, the thermal power source comprising an engine;
• a thermal power delivery system adapted to selectively deliver the waste heat from the thermoelectric generator to at least two locations;
• and
• a controller in communication with the delivery system, the controller programmed to respond to information regarding at least one parameter selected from the group consisting of fuel mass flow rate and air mass flow rate by selecting at least one of the at least two locations for delivery of the waste heat by the delivery system such that the thermoelectric generator operates substantially efficiently as the thermal power received by the thermoelectric generator varies.