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Operation and performance limitations for solid oxide fuel cells and gas turbines in a hybrid system

Kemm, Miriam LU ; Hildebrandt, Andre LU and Assadi, Mohsen LU (2004) 2004 ASME Turbo Expo 7. p.551-557
Abstract
Temperature limitations of Solid Oxide Fuel Cells (SOFC) in transient single operation and steady-state Hybrid System (HS) operation with Gas Turbines (GT) are presented. For transient SOFC simulations, an unsteady-state SOFC model was developed by upgrading a detailed validated steady-state model. As critical SOFC single operation modes, concerning the risk of material cracking due to exceeding SOFC transient temperature gradients, heat-up and cool-down are investigated. For minimization of transient SOFC temperature gradients at start-up and shut-down, a stepwise heat-up and cool-down procedure is proposed. Concerning HS off-design and part-load operation, the impact of SOFC temperature limitations on the operational window is... (More)
Temperature limitations of Solid Oxide Fuel Cells (SOFC) in transient single operation and steady-state Hybrid System (HS) operation with Gas Turbines (GT) are presented. For transient SOFC simulations, an unsteady-state SOFC model was developed by upgrading a detailed validated steady-state model. As critical SOFC single operation modes, concerning the risk of material cracking due to exceeding SOFC transient temperature gradients, heat-up and cool-down are investigated. For minimization of transient SOFC temperature gradients at start-up and shut-down, a stepwise heat-up and cool-down procedure is proposed. Concerning HS off-design and part-load operation, the impact of SOFC temperature limitations on the operational window is investigated. Results show a reduced operational window due to exceeding local SOFC temperature gradients, which can be reduced by optimal adaptation of GT to SOFC size. (Less)
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author
; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Temperature gradients, Hybrid system, Material cracking, Part-load modeling
host publication
Proceedings of the ASME Turbo Expo 2004
volume
7
pages
551 - 557
publisher
American Society Of Mechanical Engineers (ASME)
conference name
2004 ASME Turbo Expo
conference location
Vienna, Austria
conference dates
2004-06-14 - 2004-06-17
external identifiers
  • scopus:10244249220
language
English
LU publication?
yes
id
cb8b6278-c697-4f0e-8080-6999c4afcc3c (old id 613407)
date added to LUP
2016-04-04 12:17:27
date last changed
2022-01-29 23:14:11
@inproceedings{cb8b6278-c697-4f0e-8080-6999c4afcc3c,
  abstract     = {{Temperature limitations of Solid Oxide Fuel Cells (SOFC) in transient single operation and steady-state Hybrid System (HS) operation with Gas Turbines (GT) are presented. For transient SOFC simulations, an unsteady-state SOFC model was developed by upgrading a detailed validated steady-state model. As critical SOFC single operation modes, concerning the risk of material cracking due to exceeding SOFC transient temperature gradients, heat-up and cool-down are investigated. For minimization of transient SOFC temperature gradients at start-up and shut-down, a stepwise heat-up and cool-down procedure is proposed. Concerning HS off-design and part-load operation, the impact of SOFC temperature limitations on the operational window is investigated. Results show a reduced operational window due to exceeding local SOFC temperature gradients, which can be reduced by optimal adaptation of GT to SOFC size.}},
  author       = {{Kemm, Miriam and Hildebrandt, Andre and Assadi, Mohsen}},
  booktitle    = {{Proceedings of the ASME Turbo Expo 2004}},
  keywords     = {{Temperature gradients; Hybrid system; Material cracking; Part-load modeling}},
  language     = {{eng}},
  pages        = {{551--557}},
  publisher    = {{American Society Of Mechanical Engineers (ASME)}},
  title        = {{Operation and performance limitations for solid oxide fuel cells and gas turbines in a hybrid system}},
  volume       = {{7}},
  year         = {{2004}},
}