Multi-level modeling of SOFC–gas turbine hybrid system

Chan, Siew Hwa; Ho, H.K.; Tian, Yu Dong

doi:10.1016/s0360-3199(02)00160-x

Cited by 197 publications

(69 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hot exhaust burner-reformer's products (5) are then expanded through the turbine. Finally, the exhaust gas (6) provides the heat required for (i) the inlet air preheated in the recuperator (7) and (ii) the liquid mixture evaporating in the evaporator, and then is discharged to the environment (8). The operation of the single SOFC system is similar.…”

Section: Systems Descriptionmentioning

confidence: 99%

“…During the last few years, many theoretical studies have appeared in the literature concerning Solid Oxide Fuel Cell systems [4][5][6][7] and Solid Oxide Fuel Cell combined with Gas Turbine (SOFC-GT) power cycles [8][9][10][11][12][13][14][15]. Most of these works have been devoted to high temperature SOFC systems fuelled by methane [12,13] and only very few of them concerned ethanol-fed SOFC-GT systems [14].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2012

View full text Add to dashboard Cite

Abstract:In the present work, an ethanol fed Solid Oxide Fuel Cell-Gas Turbine (SOFC-GT) system has been parametrically analyzed in terms of exergy and compared with a single SOFC system. The solid oxide fuel cell was fed with hydrogen produced from ethanol steam reforming. The hydrogen utilization factor values were kept between 0.7 and 1. The SOFC's Current-Volt performance was considered in the range of 0.1-3 A/cm 2 at 0.9-0.3 V, respectively, and at the intermediate operating temperatures of 550 and 600 °C, respectively. The curves used represent experimental results obtained from the available bibliography. Results indicated that for low current density values the single SOFC system prevails over the SOFC-GT hybrid system in terms of exergy efficiency, while at higher current density values the latter is more efficient. It was found that as the value of the utilization factor increases the SOFC system becomes more efficient than the SOFC-GT system over a wider range of current density values. It was also revealed that at high current density values the increase of SOFC operation temperature leads in both cases to higher system efficiency values.

show abstract

Section: Systems Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2012

View full text Add to dashboard Cite

show abstract

“…In general, hybrid systems consist of a high temperature fuel cell (e.g., SOFC) integrated into a cycle with a micro gas turbine (MGT). This type of hybrid system has been proven to have electrical efficiency of up to 53% at 200 kW output [3], and is considered to have potential electrical efficiencies that are higher than 60% [4][5][6]. To further study and understand the SOFC-MGT hybrid system, both static [7][8][9] and dynamic [10][11][12][13] performance analyses have been conducted recently.…”

Section: Introductionmentioning

confidence: 99%

Power and temperature control of fluctuating biomass gas fueled solid oxide fuel cell and micro gas turbine hybrid system

Kaneko

Brouwer

Samuelsen

2006

Journal of Power Sources

104

View full text Add to dashboard Cite

Power and temperature control of fluctuating biomass gas fueled solid oxide fuel cell and micro gas turbine hybrid system AbstractThis paper addresses how the power and temperature are controlled in a biomass gas fueled solid oxide fuel cell (SOFC) and micro gas turbine (MGT) hybrid system. A SOFC and MGT dynamic model are developed and used to simulate the hybrid system performance operating on biomass gas. The transient behavior of both the SOFC and MGT are discussed in detail.An unstable power output is observed when the system is fed biomass gas. This instability is due to the fluctuation of gas composition in the fuel. A specially designed fuel controller succeeded not only in allowing the hybrid system to follow a step change of power demand from 32 to 35 kW, but also stably maintained the system power output at 35 kW. In addition to power control, fuel cell temperature is controlled by introduction and use of a bypass valve around the recuperator. By releasing excess heat to the exhaust, the bypass valve provided the control means to avoid the self-exciting behavior of system temperature and stabilized the temperature of SOFC at 850• C.

show abstract

“…The citrate-EDTA complexing sol-gel procedure is used for preparing Ba 2 (High Media, 99.5%). Both EDTA and citric acid are added to the precursor solution as chelating agents.…”

Section: Powder Preparationmentioning

confidence: 99%

“…During the past few decades, Solid oxide fuel cells (SOFCs) have been identified as future renewable energy option due to their high energy conversion efficiency, low environmental impact and high fuel flexibility [1][2][3]. Recently SOFCs based on proton conducting electrolytes (SOFC-H + ) have attracted much attention due to their relatively low temperature operation (400-800°C) which helps in better sealing and interconnection of the materials and lowering the thermal expansion mismatch between the cell components [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Ba0.96Sr0.04Ce0.7Zr0.3O3 Solid Oxide Fuel Cell Electrolyte by Citrate EDTA Complexing Sol-Gel Process

Sailaja

Murali

Samatha

et al. 2016

ILCPA

View full text Add to dashboard Cite

Abstract. This paper reports on the effect of Strontium doping on BaCe 0.7 Zr 0.3 O 3 electrolyte prepared using the citrate-EDTA complexing sol-gel process at temperature T=1000°C. The phase formation and evolution with the temperature has been studied by X-ray diffraction (XRD), thermal analysis (TG-DTA). The morphology of the sintered powder at T=1300°C is examined by SEMScanning Electron Microscopy, EDAX -Energy-dispersive X-ray spectroscopy analysis, FTIR -Fourier transforms infrared spectrometer, FTRS -Raman measurements. The crystallite size of the ceramic powders calculated from Scherrer equation is 28nm and the diffraction peak shifted to higher angles. Microstructure of the sintered powder revealed that the average grain size is in the range of 2 m. The incorporation of Sr is found to suppress the formation of CeO 2 like second phase and enhance the grain growth in sintered oxides. Dense ceramic materials were obtained at 1300°C and the relative density is 80% of the theoretical density. FTIR and Raman measurements reveal the complete single phase formation of the orthorhombic perovskite structure. The ionic conductivity of the pellet is investigated from room temperature to 400°C and is found to be 1.1x10 -4 S/cm (400°C). The conductivity increased as temperature increases with an activation energy of 0.48eV and hence this composition qualifies to be a promising electrolyte.

show abstract

Multi-level modeling of SOFC–gas turbine hybrid system

Cited by 197 publications

References 3 publications

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

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

Power and temperature control of fluctuating biomass gas fueled solid oxide fuel cell and micro gas turbine hybrid system

Synthesis and Characterization of Ba<sub>0.96</sub>Sr<sub>0.04</sub>Ce<sub>0.7</sub>Zr<sub>0.3</sub>O<sub>3</sub> Solid Oxide Fuel Cell Electrolyte by Citrate EDTA Complexing Sol-Gel Process

Contact Info

Product

Resources

About