Research Papers

Control Oriented Analysis of a Hybrid Solid Oxide Fuel Cell and Gas Turbine System

[+] Author and Article Information
Vasilis Tsourapas

Department of Naval Architecture and Marine Engineering, University of Michigan, NAME Building, 2600 Draper Road, Ann Arbor, MI 48109-2145djvas@umich.edu

Jing Sun

Department of Naval Architecture and Marine Engineering, University of Michigan, NAME Building, 2600 Draper Road, Ann Arbor, MI 48109-2145jingsun@umich.edu

Anna Stefanopoulou

Department of Mechanical Engineering, W. E. Lay Automotive Laboratory, University of Michigan, 1231 Beal Avenue, Room 2043, Ann Arbor, MI 48109-2121annastef@umich.edu

Note that Ist=Aci, where Ac is the cell area.

J. Fuel Cell Sci. Technol 6(4), 041008 (Aug 12, 2009) (11 pages) doi:10.1115/1.3081467 History: Received June 15, 2007; Revised August 20, 2008; Published August 12, 2009

The goal of this work is to investigate the feasibility of a hybrid solid oxide fuel cell (SOFC) and gas turbine (GT) system for mobile power production. A system consisting of a gas turbine, a burner, and an SOFC is examined to gain fundamental understanding of the system dynamics. A control oriented dynamic model is developed to provide the critically needed tool for system feasibility analysis and control strategy design. System optimization and transient analysis are performed based on the system model to determine the desired operating conditions and load following limitations. It is shown that the open loop system will shut down in the case of a large load step. Based on the insights learned from the open loop analysis, a feedback control scheme is proposed. The feedback scheme is based on a reference governor, which modifies the load applied to the generator to guarantee stability and fast tracking during transients.

Copyright © 2009 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

Energy flow of integrated fuel cell system with energy recuperation devices

Grahic Jump Location
Figure 2

Schematic of a hybrid SOFC/GT system

Grahic Jump Location
Figure 3

Operating principle of coflow planar SOFCs (1)

Grahic Jump Location
Figure 4

Compressor, turbine, shaft, and generator schematic

Grahic Jump Location
Figure 5

Hybrid SOFC/GT schematic including inputs, controls, state variables, and parameters

Grahic Jump Location
Figure 6

Steady state optimal setpoints (FF map) for current density (i), fuel, and generator load (Pgen) as functions of net load

Grahic Jump Location
Figure 7

System response during a 20–20.5 kW and 20–21 kW step in a Pt−Pc versus N plot

Grahic Jump Location
Figure 8

Equivalent schematic of SOFC/GT system with shaft dynamics separated

Grahic Jump Location
Figure 9

Full order model (FOM) and reduced order model (ROM) shaft speed response to a 3558–3650 W step in Pgend

Grahic Jump Location
Figure 10

Phase portrait of simplified system with state variables Ptc and N

Grahic Jump Location
Figure 11

Step response from 20 kW to 21 kW with various rate limiters on Pgend

Grahic Jump Location
Figure 12

Closed loop schematic with reference governor (RG) control

Grahic Jump Location
Figure 13

Open and closed loop 20–21 kW step response



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In