Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO2020005220 - CYCLE DE RANKINE ORGANIQUE POUR CENTRALE ÉLECTRIQUE À CYCLE COMBINÉ

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

THE CLAIMED INVENTION IS:

1. A gas turbine combined-cycle power plant comprising:

a gas turbine engine comprising:

a compressor for generating compressed air;

a combustor that can receive a fuel and the compressed air to produce combustion gas; and

a turbine for receiving the combustion gas and generating exhaust gas;

a heat recovery steam generator for generating steam from water utilizing heat from the exhaust gas;

a steam turbine for producing power from steam from the heat recovery steam generator; a fuel regasification system for converting the fuel from a liquid to a gas before entering the combustor; and

an Organic Rankine Cycle (ORC) system configured to:

cool compressed air extracted from the compressor to cool the gas turbine engine; and

heat liquid fuel entering the fuel regasification system.

2. The gas turbine combined-cycle power plant of claim 1 , wherein the Organic Rankine Cycle system comprises:

a fluid pump for pumping a fluid;

a heater for heating the fluid pumped by the fluid pump;

an ORC turbine for expanding the fluid heated m the heater;

a first heat exchanger positioned between the heater and the ORC turbine to heat the fluid with the compressed air extracted from the compressor; and

a cooling source for cooling the fluid between the ORC turbine and the pump.

3. The gas turbine combined-cycle power plant of claim 2, further comprising a recuperator positioned between the fluid pump and the first heat exchanger to exchange heat between the fluid entering the ORC turbine and the fluid leaving the ORC turbine.

4. The gas turbine combined-cycle power plant of claim 3, further comprising a flue gas heater positioned between the recuperator and the first heat exchanger.

5. The gas turbine combined-cycle power plant of claim 3, further comprising a second heat exchanger positioned in parallel with the recuperator.

6. The gas turbine combined-cycle power plant of claim 2, wherein the fluid comprises ammonia.

7. The gas turbine combined-cycle power plant of claim 2, wherein the cooling source comprises the fuel regasification system.

8. The gas turbine combined-cycle power plant of claim 7, wherein the fuel regasifi cation system comprises:

a fuel pump for receiving liquefied fuel;

a heat exchanger for receiving liquid fuel from the fuel pump, the heat exchanger

configured to function as a condenser for the Organic Rankme Cycle system; and a trim heater for heating gasified fuel from the heat exchanger.

9. The gas turbine combined-cycle power plant of claim 8, wherein the liquefied fuel comprises liquified natural gas.

10. A Organic Rankine Cycle (QRC) system for operation wath a gas turbine combined-cycle power plant, the ORC system comprising:

a fluid pump for pumping a fluid:

a heater for heating the fluid pumped by the fluid pump;

an ORC turbine for expanding the fluid heated in the heater;

a first heat exchanger positioned between the heater and an inlet of the ORC turbine to heat the fluid with compressed air extracted from a compressor of the gas turbine combined-cycle power plant; and

a regasification system for a fuel configured to cool the fluid between an outlet of the ORC turbine and an inlet of the pump.

11. The Organic Rankine Cycle system of claim 10, further comprising a recuperator positioned between an outlet of the pump and an inlet of the first heat exchanger to exchange heat between the fluid entering the ORC turbine and the fluid leaving the ORC turbine.

12. The Organic Rankine Cycle system of claim 1 1 , further comprising a flue gas heater positioned between the recuperator and the inlet of the first heat exchanger.

13. The Organic Rankine Cycle system of claim 11, further comprising a second heat exchanger positioned in parallel with the recuperator relative to output of the pump.

14. The Organic Rankine Cycle system of claim 1 1 , wherein the fuel regasification system composes:

a fuel pump for receiving liquefied fuel;

a heat exchanger for receiving liquid fuel from the fuel pump and fluid from an outlet of the recuperator; and

a trim heater for heating gasified fuel from the heat exchanger.

15. The Organic Rankine Cycle system of claim 11 , wherein the heat exchanger of the fuel regasification system is configured as a condenser for the fluid and a regasifier for the liquefied fuel.

16. A method of operating a gas turbine combined-cycle power plant, the method comprising:

circulating a working fluid through a closed loop using a working pump;

heating the working fluid with a first external heat source;

cooling compressed air from a compressor of the gas turbine combined-cycle power plant at a first heat exchanger with working fluid heated by the first external heat source;

expanding the heated working fluid through a turbine;

generating electrical power with the turbine; and

condensing the working fluid leaving the turbine with a liquid fuel regasification system.

17. The method of claim 16, wherein heating the working fluid with a first external heat source comprises heating the working fluid with a preheater.

18. The method of claim 16, further comprising cooling the working fluid leaving the turbine with a recuperator.

19. The method of claim 16, further comprising further cooling the compressed air from the compressor of the gas turbine combined-cycle power plant at a second heat exchanger upstream of the first heat exchanger.

20. The method of claim 16, wherein cooling the fluid leaving the turbine with a liquid fuel regasification system comprises:

pumping liquefied natural gas with a fuel pump through a regasifier heat exchanger in thermal communication with the working fluid upstream of the working pump; heating the liquefied natural gas in the heat exchanger to gasify the liquefied natural gas and condense the working fluid;

heating the gasified natural gas with a trim heater; and

providing the gasified natural gas to a gas turbine of the gas turbine combined-cycle power plant.