Design, Simulation and Control of a 100 MW-Class Solid Oxide Fuel Cell Gas Turbine Hybrid SystemSource: Journal of Fuel Cell Science and Technology:;2010:;volume( 007 ):;issue: 003::page 31007Author:Fabian Mueller
,
Brian Tarroja
,
James Maclay
,
Faryar Jabbari
,
Jacob Brouwer
,
Scott Samuelsen
DOI: 10.1115/1.3207868Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A 100 MW-class planar solid oxide fuel cell synchronous gas turbine hybrid system has been designed, modeled, and controlled. The system is built of 70 functional fuel cell modules, each containing 10 fuel cell stacks, a blower to recirculate depleted cathode air, a depleted fuel oxidizer, and a cathode inlet air recuperator with bypass. The recuperator bypass serves to control the cathode inlet air temperature, while the variable speed cathode blower recirculates air to control the cathode air inlet temperature. This allows for excellent fuel cell thermal management without independent control of the gas turbine, which at this scale will most likely be a synchronous generator. In concept the demonstrated modular design makes it possible to vary the number of cells controlled by each fuel valve, power electronics module, and recirculation blower, so that actuators can adjust to variations in the hundreds of thousands of fuel cells contained within the 100 MW hybrid system for improved control and reliability. In addition, the modular design makes it possible to take individual fuel cell modules offline for maintenance while the overall system continues to operate. Parametric steady-state design analyses conducted on the system reveal that the overall fuel-to-electricity conversion efficiency of the current system increases with increased cathode exhaust recirculation. To evaluate and demonstrate the conceptualized design, the fully integrated system was modeled dynamically in MATLAB-SIMULINK ® . Simple proportional feedback with steady-state feed-forward controls for power tracking, thermal management, and stable gas turbine operation were developed for the system. Simulations of the fully controlled system indicate that the system has a high efficiency over a large range of operating conditions, decent transient load following capability, fuel and ambient temperature disturbance rejection, and the capability to operate with a varying number of fuel cell modules. The efforts here build on prior work and combine the efforts of system design, system operation, component performance characterization, and control to demonstrate hybrid transient capability in large-scale coal synthesis gas-based applications through simulation. Furthermore, the use of a modular fuel cell system design, the use of blower recirculation, and the need for integrated system controls are verified.
keyword(s): Temperature , Fuels , Design , Fuel cells , Gas turbines , Solid oxide fuel cells , Steady state , Stress , Turbines , Compressors , Simulation , Combustion chambers , Flow (Dynamics) AND Control equipment ,
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contributor author | Fabian Mueller | |
contributor author | Brian Tarroja | |
contributor author | James Maclay | |
contributor author | Faryar Jabbari | |
contributor author | Jacob Brouwer | |
contributor author | Scott Samuelsen | |
date accessioned | 2017-05-09T00:38:30Z | |
date available | 2017-05-09T00:38:30Z | |
date copyright | June, 2010 | |
date issued | 2010 | |
identifier issn | 2381-6872 | |
identifier other | JFCSAU-28942#031007_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/143629 | |
description abstract | A 100 MW-class planar solid oxide fuel cell synchronous gas turbine hybrid system has been designed, modeled, and controlled. The system is built of 70 functional fuel cell modules, each containing 10 fuel cell stacks, a blower to recirculate depleted cathode air, a depleted fuel oxidizer, and a cathode inlet air recuperator with bypass. The recuperator bypass serves to control the cathode inlet air temperature, while the variable speed cathode blower recirculates air to control the cathode air inlet temperature. This allows for excellent fuel cell thermal management without independent control of the gas turbine, which at this scale will most likely be a synchronous generator. In concept the demonstrated modular design makes it possible to vary the number of cells controlled by each fuel valve, power electronics module, and recirculation blower, so that actuators can adjust to variations in the hundreds of thousands of fuel cells contained within the 100 MW hybrid system for improved control and reliability. In addition, the modular design makes it possible to take individual fuel cell modules offline for maintenance while the overall system continues to operate. Parametric steady-state design analyses conducted on the system reveal that the overall fuel-to-electricity conversion efficiency of the current system increases with increased cathode exhaust recirculation. To evaluate and demonstrate the conceptualized design, the fully integrated system was modeled dynamically in MATLAB-SIMULINK ® . Simple proportional feedback with steady-state feed-forward controls for power tracking, thermal management, and stable gas turbine operation were developed for the system. Simulations of the fully controlled system indicate that the system has a high efficiency over a large range of operating conditions, decent transient load following capability, fuel and ambient temperature disturbance rejection, and the capability to operate with a varying number of fuel cell modules. The efforts here build on prior work and combine the efforts of system design, system operation, component performance characterization, and control to demonstrate hybrid transient capability in large-scale coal synthesis gas-based applications through simulation. Furthermore, the use of a modular fuel cell system design, the use of blower recirculation, and the need for integrated system controls are verified. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Design, Simulation and Control of a 100 MW-Class Solid Oxide Fuel Cell Gas Turbine Hybrid System | |
type | Journal Paper | |
journal volume | 7 | |
journal issue | 3 | |
journal title | Journal of Fuel Cell Science and Technology | |
identifier doi | 10.1115/1.3207868 | |
journal fristpage | 31007 | |
identifier eissn | 2381-6910 | |
keywords | Temperature | |
keywords | Fuels | |
keywords | Design | |
keywords | Fuel cells | |
keywords | Gas turbines | |
keywords | Solid oxide fuel cells | |
keywords | Steady state | |
keywords | Stress | |
keywords | Turbines | |
keywords | Compressors | |
keywords | Simulation | |
keywords | Combustion chambers | |
keywords | Flow (Dynamics) AND Control equipment | |
tree | Journal of Fuel Cell Science and Technology:;2010:;volume( 007 ):;issue: 003 | |
contenttype | Fulltext |