Operation and performance limitations for solid oxide fuel cells and gas turbines in a hybrid system
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/613407
- author
- Kemm, Miriam LU ; Hildebrandt, Andre LU and Assadi, Mohsen LU
- organization
- publishing date
- 2004
- 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}}, }