scholarly journals Experimental validation of a dynamic modelling of a Reversible Solid Oxide Cells (rSOCs)

2022 ◽  
Vol 334 ◽  
pp. 01003
Author(s):  
Michele Bolognese ◽  
Matteo Testi ◽  
Lorenzo De Bortoli ◽  
Ruben Bartali ◽  
Luigi Crema
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Dynamic Model ◽  
High Efficiency ◽  
Dynamic Modelling ◽  
Cell System ◽  
Solid Oxide ◽  
Partial Load ◽  
Solid Oxide Cell ◽  
End Uses

The integration of Hydrogen technologies in different end-uses such as transport, electric microgrids, residential and industrial applications, will increase exponentially soon. Hydrogen as energy carrier allows more favourable energy conversion than other conventional systems and is crucial in worldwide decarbonize end uses. The production of green hydrogen, using RES, is a key area for the evolution of this technology. In this context, SWITCH is a Horizon 2020 European Project that aims to design, build and test an in-situ fully integrated and continuous multisource hydrogen production system, based on solid oxide cell technology. Reversible Solid Oxide Cell (rSOCs) technologies allow to convert renewable energy as hydrogen in the power-to-gas application (P2G) and in reversible mode is able to produce electricity from hydrogen stored, power-to-power application (P2P). rSOCs are really interesting to stabilize the random nature of RES because a combined electrolysis and fuel cell system should be able to switch between the two modes as quickly as possible in order to optimize the integration and the use of RES. However, rSOCs need a complex BoP from the thermal point of view, able to guarantee high efficiency even at partial load mode as well as easy start-up and shutdown procedures. In this work, a Stack Box Module dynamic model was developed in Modelica environment as a dynamic tool for the definition and optimization of BoP requirements. Stack model was validated in SOFC (Solid Oxide Fuel Cell) and SOE (Solid Oxide Electrolyser). The results of the simulation provide verification of the technical/thermodynamic behaviour and flexibility of a stack box of 70 cells. Dynamic modelling allows to evaluate the effect of the reagent inlet temperatures on the operation and hydrogen production/consumption in terms of yield as well as the transients between the different operative modes. Model has been validated by experimental measurements performed in the laboratory. In particular, the kinetics of the reactions governing steam methane reforming (SMR) was considered from data found in the literature, while the ASR (Area Specific Resistance) value was calibrated according to experimental data. The results of the dynamic model show as model can be a useful design and optimization tool for the SOCs technology.

A Dynamic Model of an Atmospheric Solid Oxide Fuel Cell System for Stationary Power Generation

2006 ◽  
Author(s):  
Miriam Kemm ◽  
Azra Selimovic ◽  
Mohsen Assadi
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Dynamic Model ◽  
Transient Behavior ◽  
Cell System ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell System ◽  
System Components ◽  
Solid Part

This paper focuses on the transient behavior of a solid oxide fuel cell system used for stationary power production. Dynamic modelling is applied to identify the characteristic time scales of the system components when introducing a disturbance in operational parameters of the system. The information on the response of the system may be used to specify the control loops needed to manage the changes with respect to safe component operation. The commercial process modelling tool gPROMS is used to perform the system simulations. The component library of the tool is completed with dynamic models of a fuel cell stack and a prereformer. The other components are modelled for steady state operation. For the fuel cell a detailed dynamic model is obtained by writing the constitutive laws for heat transfer in the solid part of the cell and conservation of heat and mass in the air and fuel channels. Comprehensive representation of resistive cell losses, reaction kinetics for the reforming and heat conduction through the solid part of the cell is also included in the model. The prereformer is described as a dynamic pseudo-homogeneous one-dimensional tubular reactor accounting for methane steam reforming and water-gas shift reaction. The differences in the transient behavior of the system components and their interaction are investigated under load changes and feed disturbances.

Experiences With the First Japanese-Made Solid-Oxide Fuel-Cell System

2005 ◽  
Vol 2 (3) ◽  
pp. 179-185 ◽  
Author(s):  
Yasunobu Mizutani ◽  
Koji Hisada ◽  
Kenji Ukai ◽  
Misuzu Yokoyama ◽  
Hirofumi Sumi
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
High Efficiency ◽  
Cost Effective ◽  
Cell System ◽  
Solid Oxide ◽  
Small Scale ◽  
Oxide Fuel ◽  
Bipolar Plates ◽  
Efficiency Cost

A solid-oxide fuel-cell (SOFC) system based on planar type cells and a cylindrical stack design was examined for small-scale stationary applications. To reduce the operating temperature of electrolyte-supported type cells, scandia-stabilized zirconia (ScSZ) was employed as the electrolyte. A compact catalytic partial oxidation (CPOx) reformer was employed and thin ferritic stainless steel was used for the interconnect bipolar plates. As a result, a carefully designed internal manifold-type 68 cell stack produced an output of 1kW at 1073K with thermal self-sustaining conditions. Also, important issues in realizing high-efficiency, cost-effective SOFC systems are discussed.

Hybrid Solid Oxide Fuel Cell/Gas Turbine System for High Altitude Long Endurance Aerospace Missions

2006 ◽  
Author(s):  
Ananda Himansu ◽  
Joshua E. Freeh ◽  
Christopher J. Steffen ◽  
Robert T. Tornabene ◽  
Xiao-Yen J. Wang
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
High Altitude ◽  
Gas Turbine ◽  
High Efficiency ◽  
Solid Oxide ◽  
Total System ◽  
Oxide Fuel ◽  
Solid Oxide Cell ◽  
Long Endurance

A system level analysis, inclusive of mass, is carried out for a cryogenic hydrogen fueled hybrid solid oxide fuel cell and bottoming gas turbine (SOFC/GT) power system. The system is designed to provide primary or secondary electrical power for an unmanned aerial vehicle (UAV) over a high altitude, long endurance mission. The net power level and altitude are parametrically varied to examine their effect on total system mass. Some of the more important technology parameters, including turbomachinery efficiencies and the SOFC area specific resistance, are also studied for their effect on total system mass. Finally, two different solid oxide cell designs are compared to show the importance of the individual solid oxide cell design on the overall system. We show that for long mission durations of 10 days or more, the fuel mass savings resulting from the high efficiency of an SOFC/GT system more than offset the larger powerplant mass resulting from the low specific power of the SOFC/GT system. These missions therefore favor high efficiency, low power density systems, characteristics typical of fuel cell systems in general.

USE OF SOLID OXIDE FUEL CELL FOR INCREASING THE ENERGY EFFICIENCY OF THE ELECTROFLOTATOR

2019 ◽  
Vol 9 (1) ◽  
pp. 47-51
Author(s):  
Vladimir D. NAZAROV ◽  
Ivan S. ERILIN ◽  
Maxim V. NAZAROV ◽  
Olga V. SMORODOVA
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
High Efficiency ◽  
Experimental Studies ◽  
Active Surface ◽  
Cell System ◽  
Solid Oxide ◽  
Specific Power ◽  
Oxide Fuel ◽  
Hydrogen Fuel Cell

Advances in fuel cells in recent years have made it possible to apply them with high efficiency in various engineering fields. In this paper, a scheme of functioning of an electrofloter was proposed in conjunction with a solid oxide fuel cell. Experimental studies of a hydrogen fuel cell were carried out to obtain a current-voltage characteristic and a curve for the dependence of the fuel cell efficiency on the specific power and current was obtained. The surface efficiency of the electroflater - fuel cell system was built and conclusions were drawn about energy savings and optimal areas of the active surface of the fuel cell under investigation when working with electroflotters with a capacity of up to 3 m3 / h.

High efficiency thermoelectric cooperative control of a stand-alone solid oxide fuel cell system with an air bypass valve

Energy ◽  
2018 ◽  
Vol 152 ◽  
pp. 13-26 ◽  
Author(s):  
Jianhua Jiang ◽  
Tan Shen ◽  
Zhonghua Deng ◽  
Xiaowei Fu ◽  
Jian Li ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Cooperative Control ◽  
High Efficiency ◽  
Cell System ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell System ◽  
Bypass Valve

Examination of a high-efficiency solid oxide fuel cell system that reuses exhaust gas

2017 ◽  
Vol 114 ◽  
pp. 1387-1392 ◽  
Author(s):  
Takaaki Somekawa ◽  
Kazuo Nakamura ◽  
Takuto Kushi ◽  
Takao Kume ◽  
Kenjiro Fujita ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
High Efficiency ◽  
Cell System ◽  
Solid Oxide ◽  
Exhaust Gas ◽  
Oxide Fuel ◽  
Fuel Cell System
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