Dynamic Simulation of a Pressurized 220kW Solid Oxide Fuel-Cell–Gas-Turbine Hybrid System: Modeled Performance Compared to Measured Results

[+] Author and Article Information
R. A. Roberts

National Fuel Cell Research Center, University California, Irvine, Irvine, CA 92697-3550

J. Brouwer

National Fuel Cell Research Center, University California, Irvine, Irvine, CA 92697-3550jb@nfcrc.uci.edu

J. Fuel Cell Sci. Technol 3(1), 18-25 (Aug 19, 2005) (8 pages) doi:10.1115/1.2133802 History: Received February 08, 2005; Revised August 19, 2005

Hybrid fuel-cell–gas-turbine (FC/GT) systems are technologically advanced systems that are promising for electric power generation with ultralow emissions and high efficiency for a large range of power plant sizes. A good understanding of the steady-state and dynamic performance of a FC/GT system is needed in order to develop and advance this hybrid technology. In this work, a detailed dynamic model of a solid oxide fuel cell/gas turbine (SOFC/GT) system has been developed. The system that is simulated represents the 220kW SOFC/GT hybrid system developed by Siemens Westinghouse. Results of the dynamic model and experimental data gathered during the operation and testing of the 220kW SOFC/GT at the National Fuel Cell Research Center are compared and presented.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 1

Pressurized 220kW SOFC/gas turbine hybrid

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Figure 2

Diagram of the pressurized 220kW SOFC/gas turbine hybrid system

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Figure 3

Tubular SOFC stack design

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Figure 4

Schematic approach to dynamic simulation of a gas turbine engine

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Figure 5

Fuel flow and bypass valve positions used in the experiment and simulations

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Figure 6

SOFC power experimental and simulation comparison

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Figure 7

Gas turbine power simulation and experimental data comparison

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Figure 8

Model and experiment turbine inlet temperature comparison

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Figure 9

Comparison of temperature states in hybrid system for initial and final conditions



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