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TECHNICAL PAPERS: Gas Turbines: Microturbines and Small Turbomachinery

Transient Modeling of the NETL Hybrid Fuel Cell/Gas Turbine Facility and Experimental Validation

[+] Author and Article Information
Mario L. Ferrari

Thermochemical Power Group (TPG)-DiMSET, Università di Genova, Genova, Italymario.ferrari@unige.it

Eric Liese

 National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WVeric.liese@netl.doe.gov

David Tucker

 National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WVdavid.tucker@netl.doe.gov

Larry Lawson

 National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WVlarry.lawson@netl.doe.gov

Alberto Traverso

Thermochemical Power Group (TPG)-DiMSET, Università di Genova, Genova, Italyalberto.traverso@unige.it

Aristide F. Massardo

Thermochemical Power Group (TPG)-DiMSET, Università di Genova, Genova, Italymassardo@unige.it

J. Eng. Gas Turbines Power 129(4), 1012-1019 (Mar 28, 2007) (8 pages) doi:10.1115/1.2747265 History: Received December 14, 2006; Revised March 28, 2007

This paper describes the experimental validation of two different transient models of the hybrid fuel cell/gas turbine facility of the U.S. DOE-NETL at Morgantown. The first part of this work is devoted to the description of the facility, designed to experimentally investigate these plants with real components, except the fuel cell. The behavior of the SOFC is obtained with apt volumes (for the stack and the off-gas burner) and using a combustor to generate similar thermal effects. The second part of this paper shows the facility real-time transient model developed at the U.S. DOE-NETL and the detailed transient modeling activity using the TRANSEO program developed at TPG. The results obtained with both models are successfully compared with the experimental data of two different load step decreases. The more detailed model agrees more closely with the experimental data, which, of course, is more time consuming than the real-time model (the detailed model operates with a calculation over calculated time ratio around 6). Finally, the TPG model has been used to discuss the importance of performance map precision for both compressor and turbine. This is an important analysis to better understand the steady-state difference between the two models.

Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Layout of a representative direct fuel cell/gas turbine hybrid system (20)

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Figure 2

Flow diagram of the Hyper facility at NETL (20)

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Figure 3

Picture of the Hyper facility (16)

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Figure 4

15kW load step decrease; rotational speed comparison

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Figure 5

15kW load step decrease; fuel mass flow rate comparison

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Figure 6

15kW load step decrease; fuel cell plenum mass flow rate comparison

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Figure 7

15kW load step decrease; fuel cell inlet temperature comparison

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Figure 8

15kW load step decrease; combustor inlet temperature comparison

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Figure 9

30kW load step decrease; rotational speed comparison

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Figure 10

30kW load step decrease; fuel mass flow rate comparison

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Figure 11

30kW load step decrease; fuel cell plenum mass flow rate comparison

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Figure 12

30kW load step decrease; fuel cell inlet temperature comparison

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Figure 13

Fuel cell inlet temperature; compressor efficiency variation

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Figure 14

Fuel cell inlet temperature; turbine efficiency variation

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Figure 15

Rotational speed comparison; case with the turbine efficiency increased

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Figure 16

Fuel cell inlet temperature comparison; case with the turbine efficiency increased

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