Optimisation of hat-cycles - With and without CO2 capture
(2004) 2004 ASME Turbo Expo 7. p.461-468- Abstract
- In a world where distributed power generation and deregulation of energy markets are on everyone's agenda, the need for highly efficient power plants with short lead times is greater than ever. Although at present combined cycles provide a solution, development of ever more advanced machines to increase efficiency and lower the environmental impact has led to high maintenance costs and a decrease in availability. The Humid Air Turbine (HAT) represents a different approach, suitable for distributed power generation in the medium power range. The HAT cycle, and other wet gas turbine cycles, which have been extensively studied during the last ten years, show as high an efficiency as that of combined cycles, but at a lower specific cost and,... (More)
- In a world where distributed power generation and deregulation of energy markets are on everyone's agenda, the need for highly efficient power plants with short lead times is greater than ever. Although at present combined cycles provide a solution, development of ever more advanced machines to increase efficiency and lower the environmental impact has led to high maintenance costs and a decrease in availability. The Humid Air Turbine (HAT) represents a different approach, suitable for distributed power generation in the medium power range. The HAT cycle, and other wet gas turbine cycles, which have been extensively studied during the last ten years, show as high an efficiency as that of combined cycles, but at a lower specific cost and, with inherently low emissions of NO<sub>X</sub>. Despite all research done no full-scale plant has been built as yet. CO<sub>2</sub> capture is another concept widely studied in recent years. In the present study three HAT cycle configurations are investigated, two of them connected to a post-combustion CO<sub>2</sub>-capture plant. Thermodynamic and thermoeconomic optimisation of the plants was performed using genetic algorithms (GA), a robust optimisation technique based on Darwinian evolution theories. The three configurations studied were 1) a standard inter-cooled HAT cycle, referred to as the reference cycle. 2) the reference cycle together with an integrated CO<sub>2</sub>-capture plant taking the energy needed for the CO<sub>2</sub> separation from the exhaust heat of the turbine, and 3) the reference cycle together with a CO<sub>2</sub> capture plant, in which the energy is supplied by a separate bio-fuelled boiler. This third configuration enables all fossil-based CO<sub>2</sub> to be separated. All power cycles were modelled using IPSEpro, a heat-and mass-balance software, employing advanced component models developed by the authors. It has an interface for optimisation and the possibility of employing user-defined objective functions. The impact of CO<sub>2</sub> taxation was studied to determine showing which configuration is the most economical at the current fuel-price and tax-level. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/613507
- author
- Fredriksson Möller, Björn LU ; Assadi, Mohsen LU ; Obana, Mitsuru and Mitakakis, Athanasios
- organization
- publishing date
- 2004
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Humid air turbine (HAT), Electrical efficiency, Exhaust heat, Energy markets
- host publication
- Proceedings of the ASME Turbo Expo 2004
- volume
- 7
- pages
- 461 - 468
- 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
- language
- English
- LU publication?
- yes
- id
- a347a162-6af0-40c1-bccb-058ddf122530 (old id 613507)
- date added to LUP
- 2016-04-04 11:42:36
- date last changed
- 2018-11-21 21:06:40
@inproceedings{a347a162-6af0-40c1-bccb-058ddf122530,
abstract = {{In a world where distributed power generation and deregulation of energy markets are on everyone's agenda, the need for highly efficient power plants with short lead times is greater than ever. Although at present combined cycles provide a solution, development of ever more advanced machines to increase efficiency and lower the environmental impact has led to high maintenance costs and a decrease in availability. The Humid Air Turbine (HAT) represents a different approach, suitable for distributed power generation in the medium power range. The HAT cycle, and other wet gas turbine cycles, which have been extensively studied during the last ten years, show as high an efficiency as that of combined cycles, but at a lower specific cost and, with inherently low emissions of NO<sub>X</sub>. Despite all research done no full-scale plant has been built as yet. CO<sub>2</sub> capture is another concept widely studied in recent years. In the present study three HAT cycle configurations are investigated, two of them connected to a post-combustion CO<sub>2</sub>-capture plant. Thermodynamic and thermoeconomic optimisation of the plants was performed using genetic algorithms (GA), a robust optimisation technique based on Darwinian evolution theories. The three configurations studied were 1) a standard inter-cooled HAT cycle, referred to as the reference cycle. 2) the reference cycle together with an integrated CO<sub>2</sub>-capture plant taking the energy needed for the CO<sub>2</sub> separation from the exhaust heat of the turbine, and 3) the reference cycle together with a CO<sub>2</sub> capture plant, in which the energy is supplied by a separate bio-fuelled boiler. This third configuration enables all fossil-based CO<sub>2</sub> to be separated. All power cycles were modelled using IPSEpro, a heat-and mass-balance software, employing advanced component models developed by the authors. It has an interface for optimisation and the possibility of employing user-defined objective functions. The impact of CO<sub>2</sub> taxation was studied to determine showing which configuration is the most economical at the current fuel-price and tax-level.}},
author = {{Fredriksson Möller, Björn and Assadi, Mohsen and Obana, Mitsuru and Mitakakis, Athanasios}},
booktitle = {{Proceedings of the ASME Turbo Expo 2004}},
keywords = {{Humid air turbine (HAT); Electrical efficiency; Exhaust heat; Energy markets}},
language = {{eng}},
pages = {{461--468}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
title = {{Optimisation of hat-cycles - With and without CO<sub>2</sub> capture}},
volume = {{7}},
year = {{2004}},
}