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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 In Proceedings of the ASME Turbo Expo 2004 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
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Temperature gradients, Hybrid system, Material cracking, Part-load modeling
in
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
external identifiers
  • Scopus:10244249220
language
English
LU publication?
yes
id
cb8b6278-c697-4f0e-8080-6999c4afcc3c (old id 613407)
date added to LUP
2007-11-27 12:44:56
date last changed
2016-10-13 04:50:42
@misc{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},
  keyword      = {Temperature gradients,Hybrid system,Material cracking,Part-load modeling},
  language     = {eng},
  pages        = {551--557},
  publisher    = {ARRAY(0x92a81f0)},
  series       = {Proceedings of the ASME Turbo Expo 2004},
  title        = {Operation and performance limitations for solid oxide fuel cells and gas turbines in a hybrid system},
  volume       = {7},
  year         = {2004},
}