Identifying Operational Requirements for Flexible CCS Power Plant in Future Energy Systems

Montañés, Rubén Mocholí; Korpås, Magnus; Nord, Lars O.; Jaehnert, Stefan

doi:10.1016/j.egypro.2016.01.003

Cited by 29 publications

(15 citation statements)

References 13 publications

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“…When integrated with power plants, PCC plants are required to cope with the operational requirements of power plants. It has been estimated that there will be a demand for operational flexibility in futuristic power plants due to the high penetration of renewable energy sources in the European energy market by the year 2030 [28]. Therefore, one of the major concerns for the operation of PCC integrated with such power plants is how much these comparatively slow and semi-batch chemical processes can cope with during such flexible operation of power plants.…”

Section: Transient Response Of Pilot Plant Under Variable Process Conmentioning

confidence: 99%

Prospects of using equilibrium-based column models in dynamic process simulation of post-combustion CO2 capture for coal-fired power plant

Dutta

Nord

Bolland

2017

Fuel

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This paper discusses the limitations and prospects of using equilibrium-based column models for the dynamic simulation of postcombustion CO2 capture processes. Based on their features, one of three available commercial process simulators was chosen for this study. A pilot plant configuration adopted from literature was modeled and simulated using this simulator. Simulation results were compared with plant data and with results using standard rate-based models as available in literature. Temperature profiles in columns and overall mass and energy balances were found to be similar to plant data; however, CO2 capture-rate, reboiler-duty, and rich-loading using the model were overestimated. A method of reduced stage efficiencies in the absorber was used, which improved performance prediction further with a maximum deviation of 5%. Further, this dynamic model was used to analyze the process subjected to variation in flue gas flow-rate with a similar trend of futuristic power plants by controlling either liquid to gas ratio or CO2 capture-rate. Controlling liquid to gas ratio provided more control over the reboiler-duty while controlling the capture-rate focused on maintaining a certain capture ratio. The advantages and disadvantages of both methods are discussed and based on that, the controlling capture ratio was found suitable for using while power plant works flexibly with stringent emission regulations.

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Section: Transient Response Of Pilot Plant Under Variable Process Conmentioning

confidence: 99%

Prospects of using equilibrium-based column models in dynamic process simulation of post-combustion CO2 capture for coal-fired power plant

Dutta

Nord

Bolland

2017

Fuel

Self Cite

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“…Due to the high penetration of variable renewable energy sources, thermal power plants may operate in a 28 cyclic mode, considering the demand and generation variability [26]. Therefore, the operational scenario 29 of futuristic power plants will depend on the electricity price and demand.…”

Section: Assumed Power Plant Load and Flue Gas Characteristics 27mentioning

confidence: 99%

Selection and design of post-combustion CO2 capture process for 600 MW natural gas fueled thermal power plant based on operability

Dutta

Nord

Bolland

2017

Energy

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8Post-combustion CO 2 capture (PCC) plant for a typical 600 MW natural gas fueled thermal power plant was designed as a trade-off between 9 operability and mitigation of the efficiency penalty. Two modified PCC plant configurations with low efficiency penalty were selected. The 10 methodology for designing PCC plants was adapted by incorporating design constraints based on operability and the construction of absorbers. 11This was applied in sizing the equipment of the plants. Two configurations of absorbers were analyzed based on flue gas flow rate at full-load 12 condition and at time-average of an assumed load variation of a power plant operating flexibly. It was found that the absorber designed at time-

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“…A power plant operated in a power market with a high penetration of renewables will most likely be operated in load-following mode [7,63]. This means that the power plant with PCC will be operated during a significant amount of its lifetime at part loads.…”

Section: Open-loop Step Responses At Different Plant Flue Gas Capacitiesmentioning

confidence: 99%

“…A load change event would result in a significant change in flue gas flow rate, at a ramp rate given by GT operation and controls. Fast ramp rates are the goal of power plant operators, since a fast power plant can respond to the variability in costs in a day-ahead power market [7,64]. For a NGCC power plant, a fast ramp rate is considered to be around 10%/min GT load [4,65].…”

Section: Decentralized Control Structuresmentioning

confidence: 99%

“…Among the different options and technologies for CO 2 capture in thermal power generation, post-combustion CO 2 capture with chemical absorption is considered the more mature technology that can contribute to significantly reducing the carbon intensity (kgCO 2 /kWh el ) of fossil-fueled thermal power plants. In future energy systems with a high penetration of renewable energy sources, the variability in demand and generation will introduce a change in the operating patterns of thermal power generation plants, which will have to change operating conditions [4][5][6]; there will also be a higher frequency of significant transient events including load changes, and start-up and shut-down events [7,8]. In this regard, Boot-Handford et al's carbon capture and storage update 2014 concludes that the financial case for CCS requires that it operates in a flexible manner and that load-following ability is extremely important to the long-term economics [9].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Process Model Validation and Control of the Amine Plant at CO2 Technology Centre Mongstad

2017

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This paper presents a set of steady-state and transient data for dynamic process model validation of the chemical absorption process with monoethanolamine (MEA) for post-combustion CO 2 capture of exhaust gas from a natural gas-fired power plant. The data selection includes a wide range of steady-state operating conditions and transient tests. A dynamic process model developed in the open physical modeling language Modelica is validated. The model is utilized to evaluate the open-loop transient performance at different loads of the plant, showing that pilot plant main process variables respond more slowly at lower operating loads of the plant, to step changes in main process inputs and disturbances. The performance of four decentralized control structures is evaluated, for fast load change transient events. Manipulation of reboiler duty to control CO 2 capture ratio at the absorber's inlet and rich solvent flow rate to control the stripper bottom solvent temperature showed the best performance.

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Identifying Operational Requirements for Flexible CCS Power Plant in Future Energy Systems

Cited by 29 publications

References 13 publications

Prospects of using equilibrium-based column models in dynamic process simulation of post-combustion CO2 capture for coal-fired power plant

Prospects of using equilibrium-based column models in dynamic process simulation of post-combustion CO2 capture for coal-fired power plant

Selection and design of post-combustion CO2 capture process for 600 MW natural gas fueled thermal power plant based on operability

Dynamic Process Model Validation and Control of the Amine Plant at CO2 Technology Centre Mongstad

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