Exergy Analysis of an Intermediate Temperature Solid Oxide Fuel Cell-Gas Turbine Hybrid System Fed with Ethanol

Stamatis, A.; Vinni, Christina; Bakalis, Diamantis P.; Tzorbatzoglou, Fotini; Tsiakaras, Panagiotis

doi:10.3390/en5114268

Cited by 24 publications

(17 citation statements)

References 38 publications

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“…A lot of research has been carried out investigating the performance and the interaction of the SOFC generator and the gas turbine. The works are either theoretical [1][2][3][4][5] or based on existing devices [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Improving hybrid SOFC-GT systems performance through turbomachinery design

Bakalis

Stamatis

2014

Int. J. Energy Res.

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SUMMARY A methodology to improve the performance of a hybrid solid oxide fuel cell gas turbine (SOFC‐GT) system for the whole operating range is proposed. The method suggests a way to estimate the geometric parameters of the turbomachinery components for a hybrid SOFC‐GT system. It is based on the search of the compressor and turbine operating lines giving the optimum system efficiency both in design and part load operation. Turbomachinery models are used to calculate the geometry that produces the desired performance maps and the corresponding operating lines. Based on the new turbomachinery design, the hybrid system shows a clear efficiency advantage for the whole operating range. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Improving hybrid SOFC-GT systems performance through turbomachinery design

Bakalis

Stamatis

2014

Int. J. Energy Res.

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“…Saidur et al [18] carried out a comprehensive literature review on exergy analysis of various solar energy systems. An ethanol fed SOFC-GT system has been parametrically analyzed in terms of exergy and compared with a single SOFC system by Stamatis et al [20], Their results indicated that for low current density values the single SOFC sys tem prevails over the SOFC-GT hybrid system in terms of exergy efficiency, while at higher current density values the latter is more efficient. Dumitrescu et al [19] was developed a computational model of a hybrid pressurized solid oxide fuel cell generator/gas turbine power plant using classical thermody namic analysis in conjunction with electromechanical, fluidmechanical, and heat transfer simulations that the thermodynamic analysis was based on energy and exergy balances, in the fuel cell by a commercial software.…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of Photovoltaic Panels-Coupled Solid Oxide Fuel Cell and Gas Turbine-Electrolyzer Hybrid System

Sadeghi

Ameri

2014

Journal of Energy Resources Technology

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Exergy A n a ly s is of P h o to v o ltaic P a n e ls -C o u p le d S o lid O xide Fuel C ell and G as T u rb in e -E le c tro ly z e r H ybrid S ystemExergy losses represent true losses o f potential to generate a desired product, exergy effi ciencies always provide a measure o f approach to ideality, and the links between exergy and both economics and environmental impact can help develop improvements. In this study, PV-coupled Solid Oxide Fuel Cell (SOFC) and Gas Turbine (GT)-electrolyzer hybrid power generation system is considered to determine the contribution o f different hybrid system components in the total exergy loss. The number o f panels, the power o f SOFC-GT, and the power o f electrolyzer can have different values. Therefore, to obtain the optimum combination from ecological, economical, and reliability points o f view, a multi-objective optimization algorithm (PESA) is considered. This optimization method chooses a set o f optimum solutions that is known as Pareto frontier. The exergy loss o f some o f these optimum solutions is compared with each other. The effect o f panel angle and SOFC-GT fuel type on the hybrid system exergy loss is considered in this study. Also, the hybrid system exergy loss is determined in different months o f the year to obtain the worst month from exergy loss view.

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“…The literature presents plenty of models of SOFCs complemented with BCs based on gas turbines (SOFC-GT) fueled with different types of hydrocarbons (e.g., natural gas, methane) [14][15][16][17][18][19][20] or even SOFC-GT-ST [21] or biofuels (alcohols) [22,23]. Although each system has its particular design, it can be said that they have the following common features:…”

Section: Introductionmentioning

confidence: 99%

Operating Point Optimization of a Hydrogen Fueled Hybrid Solid Oxide Fuel Cell-Steam Turbine (SOFC-ST) Plant

2013

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This paper presents a hydrogen powered hybrid solid oxide fuel cell-steam turbine (SOFC-ST) system and studies its optimal operating conditions. This type of installation can be very appropriate to complement the intermittent generation of renewable energies, such as wind generation. A dynamic model of an alternative hybrid SOFC-ST configuration that is especially suited to work with hydrogen is developed. The proposed system recuperates the waste heat of the high temperature fuel cell, to feed a bottoming cycle (BC) based on a steam turbine (ST). In order to optimize the behavior and performance of the system, a two-level control structure is proposed. Two controllers have been implemented for the stack temperature and fuel utilization factor. An upper supervisor generates optimal set-points in order to reach a maximal hydrogen efficiency. The simulation results obtained show that the proposed system allows one to reach high efficiencies at rated power levels.

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Exergy Analysis of an Intermediate Temperature Solid Oxide Fuel Cell-Gas Turbine Hybrid System Fed with Ethanol

Cited by 24 publications

References 38 publications

Improving hybrid SOFC-GT systems performance through turbomachinery design

Improving hybrid SOFC-GT systems performance through turbomachinery design

Exergy Analysis of Photovoltaic Panels-Coupled Solid Oxide Fuel Cell and Gas Turbine-Electrolyzer Hybrid System

Operating Point Optimization of a Hydrogen Fueled Hybrid Solid Oxide Fuel Cell-Steam Turbine (SOFC-ST) Plant

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