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TECHNICAL PAPERS: Gas Turbines: Cycle Innovations, and Marine

Off-Design Performance Analysis of a Hybrid System Based on an Existing Molten Fuel Cell Stack

[+] Author and Article Information
P. Bedont

Ansaldo Fuel Cells, Genova, Italy

O. Grillo, A. F. Massardo

Thermochemical Power Group (TPG), Dipartimento di Macchine Sistemi Energetici e Trasporti, Università di Genova, Genova, Italy

J. Eng. Gas Turbines Power 125(4), 986-993 (Nov 18, 2003) (8 pages) doi:10.1115/1.1587742 History: Received December 01, 2001; Revised March 01, 2002; Online November 18, 2003
Copyright © 2003 by ASME
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References

Figures

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Molten carbonate fuel cell (MCFC) stack (Ansaldo Fuel Cells)
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Proof of concept power plant Ansaldo Fuel Cells MCFC
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Hybrid system simplified layout (fuel cell system is represented inside dashed boundary)
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Stack inlet temperatures by reducing power at fixed recycle rates
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Operating parameters at part-load condition
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Internal recycle rates at part-load condition
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CU efficiency and plant fuel utilization rate at part-load condition
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Cell voltage and Nernst potential versus currently density
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Fuel cell system utilization rates at part-load condition
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Hybrid system (HS) operating parameters at part-load condition
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Internal recycle rates at part-load condition
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Hybrid system (HS) and fuel cell system (FC) efficiency versus net nondimensional power supplied by the plant
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Percentage of net power supplied by the stack and inlet turbine temperature versus net nondimensional power supplied by the whole hybrid system
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Actual and Nernst potential of the cell against current density
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Fuel and oxygen utilization rates, and CH4 converted by sensible heat reformer, versus nondimensional power supplied by the hybrid system
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Inlet temperature at part-load condition
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Inlet cathodic percentage of CO2 (mass fraction rate) at the part-load condition
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Air compressor working points at part load conditions, when a variable turbine rotational speed is available
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Fuel cell efficiency at different turbine rotational speed versus net nondimensional power supplied by the hybrid system
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Hybrid system efficiency at different rotational speed versus net nondimensional power supplied by the plant

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