Thermoelectric generation system
Disclosed is a thermoelectric generation system that generates electricity using waste heat from a steam condenser that exchanges heat with steam as cyclic water flows through a high temperature portion and a low temperature portion, the thermoelectric generation system including: a first hot-water discharge line used to discharge the cyclic water passing through the high temperature portion; a cyclic water circulation line through which the cyclic water from under water circulates; and a thermoelectric generation unit that generates electricity on the basis of a temperature difference between a temperature of the cyclic water flowing through the first hot-water discharge line and a temperature of the cyclic water flowing through the cyclic water circulation line.
1. A thermoelectric generation system that generates electricity using waste heat from a facility having an engine driven by steam, a high-temperature cooling unit through which cyclic water passes to cool high-temperature steam from the engine, and a low-temperature cooling unit through which the cyclic water passes to cool low-temperature steam discharged from the high-temperature cooling unit, the thermoelectric generation system comprising:
a thermoelectric generation unit;
a first hot-water discharge line used to discharge the cyclic water passing through the high-temperature cooling unit and direct it to the thermoelectric generation unit;
a second hot-water discharge line used to discharge the cyclic water passing through the low-temperature cooling unit; and
a cyclic water circulation line through which the cyclic water circulates from an open flow path that is directed into the high-temperature cooling unit, the low-temperature cooling unit, and the thermoelectric generation unit,
wherein the thermoelectric generation unit generates electricity on the basis of a temperature difference between the cyclic water from the first hot-water discharge line and the cyclic water from the open flow path through the cyclic water circulation line that is directed into the thermoelectric generation unit.
2. The thermoelectric generation system according to claim 1 , wherein
the high-temperature cooling unit and the low-temperature cooling unit are supplied with the cyclic water from the open flow path through the cyclic water circulation line using a first pump, and
the cyclic water circulation line has a first branching pipeline branching from a cyclic water supply pipeline laid between the first pump, the high-temperature cooling unit, the low-temperature cooling unit, and the thermoelectric generation unit to supply the cyclic water to the high-temperature cooling unit, the low-temperature cooling unit, and the thermoelectric generation unit.
3. The thermoelectric generation system according to claim 1 , wherein the thermoelectric generation unit has:
a plurality of first water flow paths for flowing the cyclic water from the open flow path through the cyclic water circulation line, and
a plurality of second water flow paths each adjoining with one or two of the first water flow paths by interposing a thermoelectric conversion element to flow the cyclic water from the first hot-water discharge line.
4. The thermoelectric generation system according to claim 3 , wherein the thermoelectric generation unit is formed by stacking flow path modules including:
the thermoelectric conversion element,
a first flow path member arranged in one side of the thermoelectric conversion element and provided with one of the first water flow paths on a surface of the one side, and
a second flow path member arranged in the other side of the thermoelectric conversion element and provided with one of the second water flow paths on a surface of the other side.
5. The thermoelectric generation system according to claim 3 , wherein the thermoelectric conversion element is an organic thermoelectric conversion element.
6. The thermoelectric generation system according to claim 1 , wherein
the engine has one or more steam turbines that drive an electric generator, and
the thermoelectric generation unit is provided outside of a building where the steam turbines are installed and inside of a sea embankment near the sea from which the cyclic water supplied to the high-temperature cooling unit and the low-temperature cooling unit is taken.
7. The thermoelectric generation system according to claim 1 , further comprising a drainage line that drains the cyclic water from the thermoelectric generation unit.
8. The thermoelectric generation system according to claim 3 , further comprising a drainage line that drains the cyclic water from the first and second water flow paths to the open flow path.
9. The thermoelectric generation system according to claim 1 , wherein the second hot-water discharge line discharges the cyclic water from the low-temperature cooling unit to the open flow path.