Thermoelectric generation apparatus, heat generation apparatus for fuel storage tanks, and waste heat recovery system

A waste heat recovery system comprising:

• a plurality of thermoelectric generators configured to produce electric power using the heat of a plurality of engines and having a plurality of thermoelectric generation units which are connected in parallel;
• a first transformer connected with the thermoelectric generators in series, the first transformer configured to convert the electric power produced by the thermoelectric generators;
• and
• a second transformer connected with the first transformer in parallel and connected with one or more of the thermoelectric generators in series, the second transformer configured to convert the electric power produced by the one or more of the thermoelectric generators,
• wherein the plurality of engines comprise a first engine configured to provide a propulsion force to a marine structure, and a second engine configured to produce electric power and connected with the second transformer, and a third engine and a fourth engine configured to produce electric power and connected to each other in parallel, and
• wherein at least one of the second engine, the third engine, and the fourth engine is connected to both of the first transformer and the second transformer, and another of the second engine, the third engine, and the fourth engine is connected only to the second transformer.