Thermoelectric power generation system

A method of manufacturing a thermoelectric power generation system including:

• a heat exchanger including double tubes which are an inner tube and an outer tube, wherein the outer tube is a seamless cylindrical tube;
• and a thermoelectric power generation module mounted between the inner tube and the outer tube, wherein
• in the thermoelectric power generation module, P-type thermoelectric elements and N-type thermoelectric elements are alternately arrayed and mounted on a flexible substrate,
• the substrate is formed with multiple slits along a direction in which the P-type thermoelectric elements and the N-type thermoelectric elements are connected in series, and
• the method comprises:
• a step of winding the thermoelectric power generation module around the inner tube with the slits aligned with an axial direction of the inner tube,
• a step of inserting the inner tube into the outer tube with the thermoelectric power generation module wound around the inner tube, and
• a step of expanding the inner tube in a radial direction by applying a high pressure to an inside of the inner tube in order to mount the thermoelectric power generation module between the inner tube and the outer tube.