Combined Cycle of Solid Oxide Fuel Cell and Turbines with the Aim of Separating CO2 Gas.

In an effort to make higher efficiency power systems, several joint fuel cell / combustion-based cycles have been proposed and modeled. Mitsubishi Heavy Industries has recently built such a system with a solid-oxide fuel cell gas turbine plant, and is now working on a variant that includes a bottoming steam cycle. They report their double and triple cycles have LHV efficiencies greater than 52% and 70%, respectively. In order to provide insight into the thermodynamics behind such efficiencies, this study attempts to reverse engineer the Mitsubishi Heavy Industries system from publicly available data. The information learned provides the starting point for a computer model of the triple cycle. An exergy analysis is used to compare the triple cycle to its constituent sub-cycles, in particular the natural gas combined cycle. This analysis provides insights into the benefits of integrating the fuel cell and gas turbine architectures in a manner that improves the overall system performance to previously unseen efficiencies.

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Solid Oxide Fuel Cell Combined Cycles

Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations ◽

10.1115/96-gt-447 ◽

1996 ◽

Cited By ~ 4

Author(s):

Frank P. Bevc ◽

Wayne L. Lundberg ◽

Dennis M. Bachovchin

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Power Plants ◽

Combined Cycle ◽

Solid Oxide ◽

Plant Performance ◽

Gaseous Emissions ◽

Oxide Fuel ◽

Plant Design ◽

Combined Cycles

The integration of the solid oxide fuel cell (SOFC) and combustion turbine technologies can result in combined-cycle power plants, fueled with natural gas. that have high efficiencies and clean gaseous emissions. Results of a study are presented in which conceptual designs were developed for three power plants based upon such an integration, and ranging in rating from 3 to 10 MW net ac. The plant cycles are described, and characteristics of key components are summarized. In addition, plant design-point efficiency estimates are presented, as well as values of other plant performance parameters.

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Performance of a triple power generation cycle combining gas/steam turbine combined cycle and solid oxide fuel cell and the influence of carbon capture

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2014.07.001 ◽

2014 ◽

Vol 71 (1) ◽

pp. 301-309 ◽

Cited By ~ 39

Author(s):

Ju Hwan Choi ◽

Ji Ho Ahn ◽

Tong Seop Kim

Keyword(s):

Power Generation ◽

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Steam Turbine ◽

Carbon Capture ◽

Combined Cycle ◽

Solid Oxide ◽

Oxide Fuel ◽

Generation Cycle ◽

Power Generation Cycle

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Life cycle analyses of bulk-scale solid oxide fuel cell power plants and comparisons to the natural gas combined cycle

The Canadian Journal of Chemical Engineering ◽

10.1002/cjce.22207 ◽

2015 ◽

Vol 93 (8) ◽

pp. 1349-1363 ◽

Cited By ~ 8

Author(s):

Jake Nease ◽

Thomas A. Adams

Keyword(s):

Life Cycle ◽

Fuel Cell ◽

Natural Gas ◽

Solid Oxide Fuel Cell ◽

Power Plants ◽

Combined Cycle ◽

Solid Oxide ◽

Oxide Fuel ◽

Natural Gas Combined Cycle ◽

Bulk Scale

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Engineering and Economic Analyses of a Coal-Fueled Solid Oxide Fuel Cell Hybrid Power Plant

Volume 2: Turbo Expo 2005 ◽

10.1115/gt2005-68762 ◽

2005 ◽

Cited By ~ 8

Author(s):

A. D. Rao ◽

A. Verma ◽

G. S. Samuelsen

Keyword(s):

Fuel Cell ◽

Power Plant ◽

Economic Analysis ◽

Solid Oxide Fuel Cell ◽

High Efficiency ◽

Combined Cycle ◽

Solid Oxide ◽

Oxide Fuel ◽

Temperature Separation ◽

Integrated Gasification

An advanced coal based power plant system that has an electrical efficiency of 60% on an HHV basis is defined. The solid oxide fuel cell (SOFC) hybrid has been shown to be an essential requirement in order to achieve such a high efficiency. The coal is gasified utilizing a high pressure air-blown advanced transport reactor (ATR). A thermo-economic analysis of this integrated gasification fuel cell (IGFC) plant is performed by comparing it to an integrated gasification combined cycle (IGCC) plant that utilizes a gas turbine combined cycle for power generation. Results of this thermo-economic analysis indicate that the required “break even” cost of the SOFC system is $400/kW on an installed cost basis such that the cost of electricity of IGFC plant is the same as that of the IGCC plant. Coproduction of H2 and capture of carbon emissions may be incorporated in the design without causing a major thermal penalty on the system performance when high temperature separation membranes are employed. An O2-blown gasifier is required for such applications. The technology development needs are addressed.

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