Power plant with CO 2 capture and compression
First Claim
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1. A method for operating a power plant, the method comprising:
- operating the plant via a control system and CO2 capture system;
using a power consumption of the CO2 capture stem as a control parameter for controlling net power output of the plant; and
controlling the CO2 capture system by a closed loop control system, which is integrated into the control system or coordinated by the control system or has a direct data link to the plant control system.
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Abstract
Power plant characteristics are operated in a flexible manner by controlling the power consumption of a CO2 capture and compression system. The impact of CO2 capture and compression on the capacity of a power plant can be minimized to maximize the electric power the plant can deliver to the power grid and the impact of CO2 capture and compression on the average plant efficiency can be reduced, by an operating method and a power plant, in which the power consumption of the CO2 capture system is used to control the net output of the plant.
5 Citations
21 Claims
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1. A method for operating a power plant, the method comprising:
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operating the plant via a control system and CO2 capture system; using a power consumption of the CO2 capture stem as a control parameter for controlling net power output of the plant; and controlling the CO2 capture system by a closed loop control system, which is integrated into the control system or coordinated by the control system or has a direct data link to the plant control system.
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2. A method for operating a power plant, the method comprising:
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operating the plant via a control system and CO2 capture system; using a power consumption of the CO2 capture system as a control parameter for controlling net power output of the plant; operating the CO2 capture system at reduced capacity or shutting down the CO2 capture system in order to supply additional power to the grid; and using this additional power to increase rated plant capacity.
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3. A method for operating a power plant, the method comprising:
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operating the plant via a control system and CO2 capture system; and using a power consumption of the CO2 capture system as a control parameter for controlling net power output of the plant operating the power plant close to or at design point when the CO2 capture system is in operation; and using the power consumption of the CO2 capture system as capacity reserve.
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4. A method for operating a power plant, the method comprising:
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operating the plant via a control system and CO2 capture system; using a power consumption of the CO2 capture system as a control parameter for controlling net power output of the plant; controlling the plant to maintain thermal load of the plant constant; and control the power consumption of the CO2 capture system to vary the net power output to a grid.
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5. A method for operating a power plant, the method comprising:
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operating the plant via a control system and CO2 capture system; using a power consumption of the CO2 capture s stem as a control parameter for controlling net power output of the plant; and varying a CO2 capture rate to control the power consumption of the CO2 capture system.
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6. A method for operating a power plant, the method comprising:
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operating the plant via a control system and CO2 capture system wherein the CO2 capture system comprises a CO2 compressor unit; using a power consumption of the CO2 capture system as a control parameter for controlling net power output of the plant; and shutting down the CO2 compression unit or operating the CO2 compression unit at reduced capacity. - View Dependent Claims (7)
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8. A method for operating a power plant, the method comprising:
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operating the plant via a control system and CO2 capture system, wherein the CO2 capture system comprises a regeneration unit; using a power consumption of the CO2 capture system as a control parameter for controlling net power output of the plant; and shutting down the regeneration unit or operating the regeneration unit at reduced capacity. - View Dependent Claims (11, 12, 13)
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9. A method for operating a power plant, the method comprising:
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Operating the plant via a control system and CO2 capture system, wherein the CO2 capture system comprises an absorption unit or adsorption; using a power consumption of the CO2 capture system as a control parameter for controlling net power output of the plant; and shutting down the absorption or adsorption unit or operating the absorption or adsorption unit at reduced capacity. - View Dependent Claims (10)
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14. A power plant, comprising:
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a CO2 capture system including a CO2 compression unit; and a control system configured to receive power consumption of the CO2 capture system as a control parameter and to control net power output of the plant based on the received control parameter, wherein the control system is configured to at least one of shut down the CO2 compression unit and operate the CO2 compression unit at a reduced capacity to vary a CO2 capture rate to control power consumption of the CO2 capture system. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification