Hybrid type power generation system

Patent metadata

Field	Value
Publication number	US-10731515-B2
Application number	US-201715712351-A
Country	US
Kind code	B2
Filing date	Sep 22, 2017
Priority date	Sep 28, 2016
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A hybrid type power generation system in which some of components of a cogeneration system are combined with a supercritical CO 2 power generation system, may increase an energy output by combining some of the components of the cogeneration system with the supercritical CO 2 power generation system.

First claim

What is claimed is:

1. A hybrid type power generation system comprising:
a cogeneration system producing thermal energy and electric energy by combusting fuel;
a water heater externally coupled to the cogeneration system and operable to heat heating water supplied from the cogeneration system and to return the heating water heated by the water heater to the cogeneration system; and
a supercritical CO 2 power generation system producing electric energy using supercritical CO 2 as a working fluid, the supercritical CO 2 power generation system including:
at least one pump operable to circulate the working fluid;
at least one recuperator operable to heat the working fluid passing through the at least one pump;
at least one heat exchanger operable to reheat the working fluid heated by the at least one recuperator using waste heat as a heat source;
one additional heat exchanger externally coupled to the cogeneration system and operable to heat the heating water using the waste heat as a heat source and to provide the heating water heated by the additional heat exchanger to the cogeneration system separately from the returned heating water from the water heater;
a plurality of turbines operable to be driven by the working fluid reheated by the at least one heat exchanger; and
a condenser operable to cool the working fluid passing through at least one of the turbines and introduced into the at least one recuperator,
wherein the water heater is coupled to the one additional heat exchanger and is further operable to cool the working fluid by branching a part of the working fluid introduced into the condenser and exchanging heat between the branched working fluid and the heating water supplied from the cogeneration system, and to supply at least a part of the heating water to the one additional heat exchanger.

2. The hybrid type power generation system of claim 1 , wherein the condenser, the water heater and the at least one pump are coupled such that working fluid passing through the condenser and the water heater is circulated to the at least one pump.

3. The hybrid type power generation system of claim 1 , wherein
the at least one pump is coupled to the at least one recuperator to supply the working fluid heated by the at least one pump to the at least one recuperator,
the at least one recuperator is coupled to the at least one heat exchanger to transfer the working fluid to the at least one heat exchanger, and
the at least one heat exchanger includes a plurality of heat exchangers respectively coupled to the plurality of turbines to branch the working fluid and supply the working fluid to the plurality of turbines.

4. The hybrid type power generation system of claim 1 , wherein
the at least one recuperator consists of a plurality of recuperators, the at least one heat exchanger consists of a plurality of heat exchangers, and the at least one pump is coupled to the plurality of recuperators to branch the working fluid into the plurality of recuperators,
the plurality of recuperators are respectively coupled to the plurality of heat exchangers to supply the working fluid to the plurality of heat exchangers, and
the plurality of heat exchangers are respectively coupled to the plurality of turbines to supply the working fluid to the turbines.

5. The hybrid type power generation system of claim 4 , wherein at least one of the turbines is coupled to the at least one recuperator to supply the working fluid to the at least one recuperator.

6. The hybrid type power generation system of claim 1 , wherein
the at least one recuperator consists of a plurality of recuperators, the at least one heat exchanger consists of a plurality of heat exchangers, and the at least one pump is coupled to the plurality of recuperators to branch the working fluid into the plurality of recuperators,
the plurality of recuperators are respectively coupled to the plurality of heat exchangers to supply the working fluid to the plurality of heat exchangers, and
at least one of the plurality of heat exchangers is coupled to at least one of the plurality of recuperators to supply the working fluid to the recuperator.

7. The hybrid type power generation system of claim 1 , wherein at least one of the turbines is coupled to the at least one recuperator to supply the working fluid to the at least one recuperator.

8. The hybrid type power generation system of claim 1 ,
wherein the at least one heat exchanger consists of a plurality of heat exchangers sequentially disposed from a portion into which waste heat gas is introduced toward a portion where the waste heat gas is discharged, and
wherein the one additional heat exchanger is disposed closest to the portion where the waste heat gas is discharged.

9. The hybrid type power generation system of claim 1 , wherein the at least one recuperator consists of a plurality of recuperators arranged sequentially, and the turbines are coupled to at least one of the recuperators to supply the working fluid to the sequential recuperators.

10. The hybrid type power generation system of claim 1 , wherein the water heater comprises:
a first transfer pipe configured to be connected to the cogeneration system to receive the heating water supplied from the cogeneration system;
a second transfer pipe configured to be connected to the cogeneration system to return the heating water heated by the water heater to the cogeneration system; and
a third transfer pipe having a first end configured to be connected to the water heater between the first and second transfer pipes and a second end configured to be connected to the one additional heat exchanger to supply the part of the heating water to the one additional heat exchanger.

11. A hybrid type power generation system comprising:
a cogeneration system producing thermal energy and electric energy by combusting fuel;
a water heater externally coupled to the cogeneration system and operable to heat heating water supplied from the cogeneration system and to return the heating water heated by the water heater to the cogeneration system; and
a supercritical CO 2 power generation system producing electric energy using supercritical CO 2 as a working fluid, the supercritical CO 2 power generation system including:
at least one pump operable to circulate the working fluid;
at least one recuperator operable to heat the working fluid passing through the at least one pump;
at least one heat exchanger operable to reheat the working fluid heated by the at least one recuperator using waste heat as a heat source;
one additional heat exchanger externally coupled to the cogeneration system and operable to heat the heating water using the waste heat as a heat source and to provide the heating water heated by the additional heat exchanger to the cogeneration system separately from the returned heating water from the water heater;
one turbine operable to be driven by the working fluid reheated by the at least one heat exchanger; and
a condenser operable to cool the working fluid passing through the one turbine and introduced into the at least one recuperator,
wherein the water heater is coupled to the one additional heat exchanger and is further operable to cool the working fluid by branching a part of the working fluid introduced into the condenser and exchanging heat between the branched working fluid and the heating water supplied from the cogeneration system, and to supply at least a part of the heating water to the one additional heat exchanger.

12. The hybrid type power generation system of claim 11 , wherein the condenser, the water heater and the at least one pump are coupled such that working fluid passing th

Assignees

• Doosan Heavy Ind & Construction Co Ltd
• Doosan Heavy Ind Constr Co Ltd

Inventors

• CHA Song Hun

Classifications

• F02C7/141

  of working fluid · CPC title

• F01K25/103 Primary

  Carbon dioxide (F01K25/065 takes precedence) · CPC title

• F01K7/38

  the engines being of turbine type · CPC title

• F01K7/32

  the engines using steam of critical or overcritical pressure · CPC title

• F01K7/22 Primary

  the turbines having inter-stage steam heating · CPC title