Application of a Multiple Time-Scale Rolling Horizon Optimization Technique for Improved Load-Following of an Integrated SOFC/CAES Plant with Zero Emissions

Nease, Jake; Monteiro, Nina; Adams, Thomas A.

doi:10.1016/b978-0-444-63428-3.50292-7

Cited by 5 publications

(3 citation statements)

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“…Nease and Adams [28] proposed a coal-fueled SOFC plant integrated with compressed air energy storage (CAES) that had no CO 2 emissions. And then they referred to a two-stage rolling horizon optimization (RHO) framework to optimize an SOFC/CAES integrated power plant, achieving optimal year-round peaking power with zero emissions and significantly improving load-following performance by up to 90% [29]. Roushenas proposed a novel integrated system based on a combination of a solid oxide fuel cell (SOFC) with compressed air energy storage (CAES) and a turbocharger, aiming to achieve peak shaving applications by concurrently producing domestic hot water and power at the scale of retail buildings.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics Analysis of a Novel Compressed Air Energy Storage System Combined with Solid Oxide Fuel Cell–Micro Gas Turbine and Using Low-Grade Waste Heat as Heat Source

Yang,

Sun,

Chen

2023

Energies

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As the next generation of advanced adiabatic compressed air energy storage systems is being developed, designing a novel integrated system is essential for its successful adaptation in the various grid load demands. This study proposes a novel design framework for a hybrid energy system comprising a CAES system, gas turbine, and high-temperature solid oxide fuel cells, aiming for power generation and energy storage solutions. The overall model of the hybrid power generation system was constructed in Aspen PlusTM, and the mass balance, energy balance, and thermodynamic properties of the thermal system were simulated and analyzed. The results demonstrate that the hybrid system utilizes the functional complementarity of CAES and solid oxide fuel cells (SOFCs), resulting in the cascade utilization of energy, a flexible operation mode, and increased efficiency. The overall round-trip efficiency of the system is 63%, and the overall exergy efficiency is 67%, with a design net power output of 12.5 MW. Additionally, thermodynamic analysis shows that it is advisable to operate the system under lower ambient temperatures of 25 °C, higher compressor and turbine isentropic efficiencies of 0.9, a higher fuel utilization of 0.62, and optimal SOFC/MGT split air flow rates of 1.1 kg/s. The results of this article provide guidance for designing innovative hybrid systems and system optimization.

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Section: Introductionmentioning

confidence: 99%

Thermodynamics Analysis of a Novel Compressed Air Energy Storage System Combined with Solid Oxide Fuel Cell–Micro Gas Turbine and Using Low-Grade Waste Heat as Heat Source

Yang,

Sun,

Chen

2023

Energies

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“…In general, power requirement depends on the load, which varies with the electricity demand. However, fuel cells can be operated safely in a steady-state mode and thus, energy storage should be integrated within the fuel cell system for use in load-following applications (Nease et al, 2016). In our previous studies on the SOFC and MCFC integrated system , the exhaust gas from the MCFC still contained a small amount of fuel.…”

Section: Discussionmentioning

confidence: 99%

“…In general, the electricity demand varies according to the load. However, fuel cells prefer to be operated in a steady-state mode for a safe operation reason and thus, energy storage should be implemented within the fuel cell system for the use of loadfollowing applications (Nease et al, 2016). To avoid energy loss in the energy storage, an afterburner, in which the exhaust gas from the MCFC is burned to recover the useful energy and increase the CO2 concentration, can be replaced with the combustion chamber of a gas turbine (GT) to generate more electrical energy.…”

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confidence: 99%

Design of solid oxide fuel cellmolten carbonate fuel cell combined system for power generation and carbon dioxide emission reduction

Jienkulsawad

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This research concentrates on the design and performance analysis of a solid oxide fuel cell (SOFC) and a molten carbonate fuel cell (MCFC) integrated system with using methane as fuel. Because SOFCs cannot completely use their fuel, there is remaining fuel leaving the system. In addition,�the exhaust gas from an SOFC can be directly fed into an MCFC. The integrated fuel cell system shows an electrical efficiency of 55.22%, which is higher than a single fuel cell system. Fuel utilization of both fuel cells, SOFC�temperature�dramatically affect the performance of the integrated system.�Four configurations were next proposed to be investigated and compared the performance�in terms of power generation, CO2 utilization, heat duty and NiO formation to determine the suitable design of the integrated fuel cell system. The results showed that system (B) is suitable for power generation improvement consideration with no NiO formation possibility found. However, the control strategy of such a system needs to be considered for the�efficient operation. A control structure design is performed based on economic optimization to select manipulated variables, controlled variables and control loop configurations. The objective (cost) function includes a carbon tax to get an optimal trade-off between power generation and carbon dioxide emission, and constraints include safe operation.�The relative gain array (RGA)�is applied to select input-output pairings. PID controllers are implemented to control the integrated system. As electricity demand can vary considerably and unpredictably, it is necessary to integrate energy storage with power generation systems. The gas turbine (GT) and advanced adiabatic compressed air energy storage (AA-CAES) system are implemented into the integrated fuel cell system to enhance the system flexibility.�The results showed that the�implementation of the GT and AA-CAES into the integrated fuel cell system allows the system to cope with the variations in power demand.

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Performance assessment of a hybrid solid oxide and molten carbonate fuel cell system with compressed air energy storage under different power demands

Jienkulsawad

Saebea

Patcharavorachot

et al. 2020

International Journal of Hydrogen Energy

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Application of a Multiple Time-Scale Rolling Horizon Optimization Technique for Improved Load-Following of an Integrated SOFC/CAES Plant with Zero Emissions

Cited by 5 publications

References 4 publications

Thermodynamics Analysis of a Novel Compressed Air Energy Storage System Combined with Solid Oxide Fuel Cell–Micro Gas Turbine and Using Low-Grade Waste Heat as Heat Source

Thermodynamics Analysis of a Novel Compressed Air Energy Storage System Combined with Solid Oxide Fuel Cell–Micro Gas Turbine and Using Low-Grade Waste Heat as Heat Source

Design of solid oxide fuel cellmolten carbonate fuel cell combined system for power generation and carbon dioxide emission reduction

Performance assessment of a hybrid solid oxide and molten carbonate fuel cell system with compressed air energy storage under different power demands

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Application of a Multiple Time-Scale Rolling Horizon Optimization Technique for Improved Load-Following of an Integrated SOFC/CAES Plant with Zero Emissions

Cited by 5 publications

References 4 publications

Thermodynamics Analysis of a Novel Compressed Air Energy Storage System Combined with Solid Oxide Fuel Cell–Micro Gas Turbine and Using Low-Grade Waste Heat as Heat Source

Thermodynamics Analysis of a Novel Compressed Air Energy Storage System Combined with Solid Oxide Fuel Cell–Micro Gas Turbine and Using Low-Grade Waste Heat as Heat Source

Design of solid oxide fuel cellmolten carbonate fuel cell combined system for power generation and carbon dioxide emission reduction

Performance assessment of a hybrid solid oxide and molten carbonate fuel cell system with compressed air energy storage under different power demands

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Design of solid oxide fuel cellmolten carbonate fuel cell combined system for power generation and carbon dioxide emission reduction