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Research Papers: Hydrogen Energy

Computational Model of a Hybrid Pressurized Solid Oxide Fuel Cell Generator/Gas Turbine Power Plant

[+] Author and Article Information
Adrian Dumitrescu1

Mechanical and Aerospace Engineering, Arizona State University, 551 E. Tyler Mall, Tempe, AZ 85287adumitre@asu.edu

T. W. Lee

Mechanical and Aerospace Engineering, Arizona State University, 551 E. Tyler Mall, Room 377, Tempe, AZ 85287attwl@asu.edu

R. P. Roy

Mechanical and Aerospace Engineering, Arizona State University, 551 E. Tyler Mall, Room 442, Tempe, AZ 85287ramendra.roy@asu.edu

1

Corresponding author.

J. Energy Resour. Technol 133(1), 012602 (Mar 29, 2011) (13 pages) doi:10.1115/1.4003707 History: Received September 01, 2010; Revised February 14, 2011; Published March 29, 2011; Online March 29, 2011

A computational model of a hybrid pressurized solid oxide fuel cell (PSOFC) generator/gas turbine power plant is developed using classical thermodynamic analysis in conjunction with electromechanical, fluid-mechanical, and heat transfer simulations in the fuel cell by a commercial software. The thermodynamic analysis is based on energy and exergy balances. A case study is reported in which the plant contains a Siemens–Westinghouse PSOFC generator and a Solar Turbines Mercury-50 gas turbine. Among the calculated quantities for a range of fuel cell current are the plant output power, first-law efficiency, and exergetic efficiency.

Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

The hybrid power plant configuration (thermodynamic state points and key valve locations are shown)

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Figure 2

Reforming and shift reactor control volumes at steady plant operation

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Figure 3

PSOFC stack control volume

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Figure 4

PSOFC generator control volume

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Figure 5

Combustor control volume

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Figure 6

Sectional view of the PSOFC tube simulated

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Figure 7

Computation sequence for the plant thermodynamic model

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Figure 8

FLUENT PSOFC single-tube computation (steady operation mode)

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Figure 9

Variation of anode gas species mass flow rates along the anode channel

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Figure 10

Variation of cathode gas species mass flow rates along the cathode channel

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Figure 11

Variation of gas stream temperatures along the channels

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Figure 12

Variation of anode and cathode gas stream outlet temperatures, and hydrogen utilization with tube current

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Figure 13

Variation of tube voltage and PSOFC generator output power with tube current

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Figure 14

Hybrid power plant output power (from energy balance) versus PSOFC tube current

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Figure 15

The PSOFC stack electrical arrangement at a 250 A tube current

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