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Research Papers

Solid Oxide Fuel Cell System Configurations for Distributed Generation

[+] Author and Article Information
Vittorio Verda1

Department of Energetics, Politecnico di Torino, c.so Duca degli Abruzzi 24, 10129 Torino, Italyvittorio.verda@polito.it

1

Corresponding author.

J. Fuel Cell Sci. Technol 5(4), 041001 (Sep 05, 2008) (7 pages) doi:10.1115/1.2971017 History: Received December 09, 2005; Revised April 18, 2008; Published September 05, 2008

This paper deals with the determination of the optimal configuration of two integrated systems for distributed energy generation, based on solid oxide fuel cells. Both systems are obtained starting from the Siemens CHP100 generator. The first system is obtained by recovering some of the heat flux available from the fuel cell to feed an organic Rankine cycle. The second system is obtained by installing the fuel cell generator instead of the combustion chamber of a micro-gas-turbine. The fuel cell produces about 100kW of electricity. The integrated systems allow to increase of about 30% the electricity production. Pinch analysis is then applied in order to analyze the theoretical improvements and to rearrange the location of the heat recovery devices, without modifying the temperature conditions of the main processes. The optimal structure, according to a thermodynamic criterion, is obtained and discussed.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Main components and flows of the SOFC system

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Figure 2

Thermodynamic cycle of the ORC plant

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Figure 3

Gas behavior in the reformer

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Figure 4

Composite curves of the SOFC+ORC system

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Figure 5

Grand composite curve of the SOFC+ORC system

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Figure 6

Heat exchanger network of the SOVC+ORC system

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Figure 7

Composite curves of the SOFC+GT system

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Figure 8

Grand composite curve of the SOFC+GT system

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Figure 9

Heat exchanger network of the SOFC+GT system

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Figure 10

Heat exchanger network of the SOFC+bottoming ORC

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