Compared Thermal Modeling of Anode- and Electrolyte-Supported SOFC-Gas Turbine Hybrid Systems

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Abdulrazzak Akroot ◽  
Lutfu Namli ◽  
Hasan Ozcan
Keyword(s):  
Fuel Cell ◽  
Hybrid Systems ◽  
Hybrid System ◽  
Operating Temperature ◽  
Power Production ◽  
Solid Oxide ◽  
System Model ◽  
Oxide Fuel ◽  
System Operation ◽  
And Performance

Abstract In this study, two solid oxide fuel cell (SOFC) hybrid systems (anode-supported model (ASM) and electrolyte-supported model (ESM)) is developed in matlab® and compared. The hybrid system model is considered to investigate the impacts of various operating parameters such as SOFC operating temperature and steam/carbon ratio on power production and performance of the hybrid system where it is projected that results can be utilized as guidelines for optimal hybrid system operation. According to the findings, a maximum 695 kW power is produced at 750 °C operating temperature for the anode-supported model, whereas 627 kW power is produced at 1000 °C for the electrolyte-supported model. The highest electrical efficiencies for the anode-supported model and the electrolyte-supported model are 64.6% and 58.3%, respectively. Besides, the lower value of the steam to carbon ratio is favorable for increased power output from the fuel cell and consequently a high SOFC efficiency.

Influence of Fuel Composition on Solid Oxide Fuel Cell Hybrid System Layout and Performance

2004 ◽  
Author(s):  
Francesco Marsano ◽  
Loredana Magistri ◽  
Michele Bozzolo ◽  
Olivier Tarnowski
Keyword(s):  
Fuel Cell ◽  
Natural Gas ◽  
Solid Oxide Fuel Cell ◽  
Hybrid Systems ◽  
Hybrid System ◽  
Solid Oxide ◽  
Fuel Composition ◽  
Oxide Fuel ◽  
Operation Conditions ◽  
And Performance

The design of Solid Oxide Fuel Cell (SOFC) Hybrid Systems (HS) is usually based on the use of natural gas as fuel. However, the possibility of using other fuels such as biomass gasification, pyrolysis, fermentation, and coal gasification could potentially increase the market for SOFC Hybrid Systems. In this paper, the influence of fuel composition on both HS layout and performance is investigated. The analysis is based on a layout and a detailed simulation model of a Hybrid System based on Rolls-Royce Integrated Planar SOFC (IP-SOFC) technology fed with natural gas, previously developed by the authors. Particular attention has been given to the thermal management of the stack, the anode flow recirculation design and the turbine-compressor redesign, including safe surge margin operation conditions.

Design and Performance Study of a Solid Oxide Fuel Cell and Gas Turbine Hybrid System Applied in Combined Cooling, Heating, and Power System

2012 ◽  
Vol 138 (4) ◽  
pp. 205-214 ◽  
Author(s):  
Hsiao-Wei D. Chiang ◽  
Chih-Neng Hsu ◽  
Wu-Bin Huang ◽  
Chien-Hsiung Lee ◽  
Wei-Ping Huang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Power System ◽  
Solid Oxide Fuel Cell ◽  
Gas Turbine ◽  
Hybrid System ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Performance Study ◽  
And Performance ◽  
Combined Cooling

System Analysis of a 100kW Internal Combustion Engine (ICE) Solid Oxide Fuel Cell (SOFC) Hybrid Configuration

2020 ◽  
Author(s):  
José Colón Rodríguez ◽  
Nor Farida Harun ◽  
Nana Zhou ◽  
Edward Sabolsky ◽  
David Tucker
Keyword(s):  
Fuel Cell ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Operating Temperature ◽  
Power Production ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Utilization ◽  
Fuel Cell Stack ◽  
Linear Behavior

Abstract Due to the intermittent nature of the renewable power plants and the rigid operation of existing plans, the need for flexible power production is eminent. Hybrid energy systems have shown potential for flexible power production capable to fulfill the power demands and maintain the efficiency. This work studies different design cases of a 100kW Internal Combustion Engine (ICE) and Solid Oxide Fuel Cell (SOFC) hybrid system. Anode off-gas from the fuel cell stack provided the chemical energy to run the ICE. Heat management of the anode exhaust was considered to attain the operational limits of the ICE in the present configuration. A turbocharger was used to deliver the necessary air flow for both the fuel cell stack and the engine. A series of 25 design cases were chosen to analyze the performance and the potential flexibility of this cycle. The 25-design points resulted from a matrix composed of the variation of fuel utilization and reformer operating temperature, ranging from 70% to 90% and 600K to 1000K, respectively. At each design point, hardware was re-sized to match the desired conditions. The cycle performance and fuel cell distributed profiles are discussed in this paper. It is discovered that the system efficiency increases as the fuel utilization increases following a nearly linear behavior. The highest efficiency attained is 62% at a reformer operating temperature of 800K and a 90% fuel utilization. The minimum external fuel required to maintain turbocharger in operation decreases with the increase on the reformer temperature. Power contribution between ICE and SOFC follows a linear behavior closely overlapping each trend at different reforming operational temperatures. The impact of external reforming and internal on-anode reforming is also discussed. It is found that there is an optimal balance between the external and internal reforming. The optimal methane content in this work is shown to be around ∼18 vol%.

scholarly journals Comparison between conventional design and cathode gas recirculation design of a direct-syngas solid oxide fuel cell–gas turbine hybrid systems part II: Effect of temperature difference at the fuel cell stack

2018 ◽  
Vol 7 (3) ◽  
pp. 263-267
Author(s):  
Vahid Azami ◽  
Mortaza Yari
Keyword(s):  
Fuel Cell ◽  
Hybrid Systems ◽  
Hybrid System ◽  
Temperature Difference ◽  
Solid Oxide ◽  
Effect Of Temperature ◽  
Oxide Fuel ◽  
Fuel Cell Stack ◽  
Recirculation System ◽  
Gas Recirculation

This study focuses on the effect of the temperature difference at the fuel cell stack (ΔTcell) on the performances of the two types of SOFC–GT hybrid system configurations, with and without cathode gas recirculation system. In order to investigation the effect of matching between the SOFC temperature (TSOFC) and the turbine inlet temperature (TIT) on the hybrid system performance, we considered additional fuel supply to the combustor as well as cathode gas recirculation system after the air preheater. Simulation results show that the system with cathode gas recirculation gives better efficiency and power capacity for all design conditions than the system without cathode gas recirculation under the same constraints. As the temperature difference at the cell becomes smaller, the both systems performance generally degrade. However the system with cathode gas recirculation is less influenced by the constraint of the cell temperature difference. The model and simulation of the proposed SOFC–GT hybrid systems have been performed with Cycle-Tempo software.Article History: Received January 16th 2018; Received in revised form July 4th 2018; Accepted October 5th 2018; Available onlineHow to Cite This Article: Azami, V and Yari, M. (2018) Comparison Between Conventional Design and Cathode Gas Recirculation Design of a Direct-Syngas Solid Oxide Fuel Cell–Gas Turbine Hybrid Systems Part II: Effect of Temperature Difference at The Fuel Cell Stack. International Journal of Renewable Energy Development, 7(3), 263-267.http://dx.doi.org/10.14710/ijred.7.3.263-267

A Solid Oxide Fuel Cell-Gas Turbine Hybrid System for a Freight Rail Application

2019 ◽  
Author(s):  
Philipp Ahrend ◽  
Ali Azizi ◽  
Jacob Brouwer ◽  
G. Scott Samuelsen
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Gas Turbine ◽  
Hybrid System ◽  
Lithium Ion ◽  
Economic Feasibility ◽  
Solid Oxide ◽  
System Model ◽  
Oxide Fuel ◽  
Particulate Matter Emissions

Abstract The simulation of a Solid Oxide Fuel Cell-Gas Turbine (SOFC-GT) hybrid system for a locomotive application is presented. Using Matlab Simulink, a 2.8 MW SOFC system was combined with a 500 kW GT and simulated to travel the route from Bakersfield to Mojave in California. Elevation data was imported using the Google API Console and smoothed in order to calculate the dynamic power demand for the SOFC-GT system, assuming 480 tons of freight per 120 ton locomotive traveling at an average speed of 45 mph. The SOFC-GT system model follows this demand without causing a significant disruption to the speed of the locomotive. A lithium-ion battery was included into the system model to improve the net system efficiency and make the operation smooth enough for the highly dynamic route. The overall efficiency along the simulated route has been calculated as 57% operating on partially pre-reformed natural gas fuel. These results suggest the development of a physical prototype of the simulated system and are very promising for the future of freight rail transportation throughout the US. CO2 and particulate matter emissions are significantly reduced compared to current diesel-electric locomotives and it is also possible to operate the system on hydrogen, i.e., completely emission-free. A techno-economic analysis to assess the economic feasibility of this system is currently being prepared.

Project ABSOLUTE: A ZEBRA Battery/Intermediate Temperature Solid Oxide Fuel Cell Hybrid for Automotive Applications

2006 ◽  
Vol 3 (3) ◽  
pp. 254-262 ◽  
Author(s):  
D. J. L. Brett ◽  
P. Aguiar ◽  
N. P. Brandon ◽  
R. N. Bull ◽  
R. C. Galloway ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Nickel Chloride ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
System Model ◽  
System Control ◽  
Oxide Fuel ◽  
Hybrid Concept ◽  
And Performance

Project ABSOLUTE (advanced battery solid oxide fuel cell linked unit to maximize efficiency), aims to combine a sodium-nickel chloride battery and an intermediate temperature solid oxide fuel cell (IT-SOFC) to form an all-electric hybrid package that surpasses the efficiency and performance of a purely fuel cell driven vehicle, as well as extending the range of a purely battery driven electric vehicle. This paper discusses the project background, the ABSOLUTE hybrid concept, the methodology adopted, the vehicle types and drive cycles that best suit the hybrid and system control considerations. Results from a battery and IT-SOFC system model are presented.

Location of deuterium sites at operating temperature from neutron diffraction of BaIn0.6Ti0.2Yb0.2O2.6−n(OH)2n, an electrolyte for proton-solid oxide fuel cells

2016 ◽  
Vol 18 (23) ◽  
pp. 15751-15759 ◽  
Author(s):  
Angélique Jarry ◽  
Olivier Joubert ◽  
Emmanuelle Suard ◽  
Jean Marc Zanotti ◽  
Eric Quarez
Keyword(s):  
Fuel Cell ◽  
Neutron Diffraction ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide Fuel Cell ◽  
Operating Temperature ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Proton Diffusion ◽  
Hydration Mechanism ◽  
Fundamental Understanding

A fundamental understanding of the doping effect on the hydration mechanism and related proton diffusion pathways are keys to the progress of Proton-Solid Oxide Fuel Cell (H+-SOFC) technologies.

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