Solid Oxide Fuel Cell Combined Cycles

Bevc, Frank P.; Lundberg, Wayne L.; Bachovchin, D.M.

doi:10.1115/96-gt-447

Cited by 14 publications

(13 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The performance of the recuperator is as detailed in Table 2. This cycle is similar to those described by Bevc et al (1996), Nathanson (1996), Ali and Moritz (1996) and White (1996). Perhaps the most significant aspect of these results is that the peak efficiency is only slightly greater, by around 1% point, than that obtained with the unrecuperated cycle.…”

Section: Bii Fuel Cell Plus Recuperated Gassupporting

confidence: 88%

“…The component efficiencies used in the model we likely to be slightly optimistic in predicting the performance of some existing small industrial gas turbines. However, they represent a realistic target for new turbines and are consistent with those used elsewhere (Bevc et al, 1996). ,…”

Section: Pz Lannsupporting

confidence: 82%

“…Many of the SOFC plus gas turbine combined cycles described in the literature (for example Bevc et al (1996), Nathanson (1996), andAll andMost (1996)) include a number of components in addition to the basic gas turbine and fuel cell, such as intercoolers, recuperators and reheat combustors. The simplest cycle involving only a fuel cell and gas turbine is first analysed here, before a recuperator and then an intercooler are added.…”

Section: B Cycle Studiesmentioning

confidence: 99%

See 2 more Smart Citations

Parametric Study of Fuel Cell and Gas Turbine Combined Cycle Performance

Stephenson

Ritchey

1997

Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations

View full text Add to dashboard Cite

A number of cycles have been proposed in which a solid oxide fuel cell is used as the topping cycle to a gas turbine, including those recently described by Beve et al. (1996). Such proposals frequently focus on the combination of particular gas turbines with particular fuel cells. In this paper, the development of more general models for a number of alternative cycles is described. These models incorporate variations of component performance with key cycle parameters such as gas turbine pressure ratio, fuel cell operating temperature and air flow. Parametric studies are conducted using these models to produce performance maps, giving overall cycle performance in terms of both gas turbine and fuel cell design point operating conditions. The location of potential gas turbine and fuel cell combinations on these maps is then used to identify which of these combinations are most likely to be appropriate for optimum efficiency and power output. It is well known, for example, that the design point of a gas turbine optimised for simple cycle performance is not generally optimal for combined cycle gas turbine performance. The same phenomenon may be observed in combined fuel cell and gas turbine cycles, where both the fuel cell and the gas turbine are likely to differ from those which would be selected for peak simple cycle efficiency. The implications of this for practical fuel cell and gas turbine combined cycles and for development targets for solid oxide fuel cells are discussed. Finally, a brief comparison of the economics of simple cycle fuel cells, simple cycle gas turbines and fuel cell and gas turbine combined cycles is presented, illustrating the benefits which could result.

show abstract

Section: Bii Fuel Cell Plus Recuperated Gassupporting

confidence: 88%

Section: Pz Lannsupporting

confidence: 82%

Section: B Cycle Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Parametric Study of Fuel Cell and Gas Turbine Combined Cycle Performance

Stephenson

Ritchey

1997

Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations

View full text Add to dashboard Cite

show abstract

“…2) were used as input for the SOFC+GT model, providing point-by-point the corresponding performances of the SOFC+GT cycle. Previous works have shown the possibility of obtaining net electrical efficiencies up to 75% (LHV) for medium or large scale (>100MW) power plants adopting advanced gas turbines and SOFC systems with configurations similar or more complex than the cycle represented in Fig 8: these plants benefit of both advanced CT cycles (intercooled, regenerative, reheated cycles) and the advantage of adopting high efficiencY turbomachines (Stephenson and Ritchey, 1997), often with the addition of complex heat recovery bottoming cycles (Bevc et al,1996;Campanari andMacchi, 1998, Lobachyov andRichter, 1996).…”

Section: Resultsmentioning

confidence: 99%

Full Load and Part-Load Performance Prediction for Integrated SOFC and Microturbine Systems

Campanari

1999

Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations

View full text Add to dashboard Cite

During the last years, two new subjects among the others have risen interest in the field of small scale electric power generation: advanced microturbines and Solid Oxide Fuel Cells. This paper investigates the thermodynamic potential of the integration of the Solid Oxide Fuel Cell technology with microturbine systems, in order to obtain ultra-high efficiency small capacity plants, generating electric power in the range of 250 kW with 65% LHV net electrical efficiency and with the possibility of cogenerating heat. A detailed description of the calculation model is presented, capable of full and part-load performances analysis of the microturbine and of the integrated SOFC+microturbine system.

show abstract

“…The term 'hybrid' has been introduced herein to indicate the integration of pressurized solid oxide fuel cells (PSOFC) into a standard Brayton cycle [4], Recently, successful trials of a 100 kW plant [5] with internal reforming of natural gas feed have demonstrated this concept and attracted interest into larger applications for distributed power generation, e.g. 1 MW [6] and 20 MW range [4], These larger hybrid systems have been analyzed and studied extensively over the past five years [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Assessment of Hybrid PSOFC/GT Systems for Mechanical/Electric Power Generation

Botros

Price

Parker

2000

Volume 2: Integrity and Corrosion; Offshore Issues; Pipeline Automation and Measurement; Rotating Equipment

View full text Add to dashboard Cite

Hybrid PSOFC/GT cycles consisting of pressurized solid oxide fuel cells integrated into gas turbine cycles are emerging as a major new power generation concept. These hybrid cycles can potentially offer thermal efficiencies exceeding 70% along with significant reductions in greenhouse gas and NOX emissions. This paper considers the PSOFC/GT cycle in terms of electrical and mechanical power generation with particular focus on gas pipeline companies interested in diversifying their assets into distributed electric generation or lowering pollutant emissions while more efficiently transporting natural gas. By replacing the conventional GT combustion chamber with an internally reformed PSOFC, electrical power is generated as a by-product while hot gases exiting the fuel cell are diverted into the gas turbine for mechanical power. A simple one-dimensional thermodynamic model of a generic PSOFC/GT cycle has shown that overall thermal efficiencies of 65% are attainable, whilst almost tripling the specific work (i.e. energy per unit mass of air). The main finding of this paper is that the amount of electric power generated ranges from 60–80% of the total power available depending on factors such as the system pressure ratio and degree of supplementary firing before the gas turbine. Ultimately, the best cycle should be based on the “balance of plant”, which considers factors such as life cycle cost analysis, business and market focus, and environmental emission issues.

show abstract

Solid Oxide Fuel Cell Combined Cycles

Cited by 14 publications

References 1 publication

Parametric Study of Fuel Cell and Gas Turbine Combined Cycle Performance

Parametric Study of Fuel Cell and Gas Turbine Combined Cycle Performance

Full Load and Part-Load Performance Prediction for Integrated SOFC and Microturbine Systems

Thermodynamic Assessment of Hybrid PSOFC/GT Systems for Mechanical/Electric Power Generation

Contact Info

Product

Resources

About