Humidification Processes in Gas Turbine Cycles
Författare
Summary, in English
This thesis presents a theoretical model developed for the humidification tower in an evaporative gas turbine. The developed theoretical model has been validated with measurements from experiments conducted in a 600 kWe pilot plant. This thesis presents the installation of a plate heat exchanger in the pilot plant. The experience from the pilot plant is used in a comparative study. This study evaluates the influence of the aftercooler on the performance of the evaporative gas turbine. A test facility for evaporation processes at elevated pressures and temperatures have been built. Evaporation of binary mixtures into a compressed air stream has been performed.
Experimental studies with the pilot plant have revealed that it is possible to use a plate heat exchanger as aftercooler in the evaporative gas turbine. The pressure drop on the air side in the aftercooler has been experimentally determined to 1.6% and the pinch-point to 0.1°C. The reconstruction of the pilot plant from a simple cycle to an evaporative cycle has resulted in an increase in thermal efficiency from 21% to 35%. A theoretical model has been developed for the humidification process that predicts the height of the humidification column with an error of 10?15%. Thermodynamic analysis of the bio-EvGT has been performed which have showed that the bio-EvGT cycle has an optimum efficiency of 34%. Further thermodynamics analysis has indicated that the bio-EvGT is a viable alternative to the biomass fueled steam turbine cycle.
Avdelning/ar
Publiceringsår
2005
Språk
Engelska
Fulltext
Dokumenttyp
Doktorsavhandling
Förlag
Division of Thermal Power Engineering Department of Energy Sciences Faculty of Engineering Lund University
Ämne
- Energy Engineering
Nyckelord
- applied thermodynamics
- Thermal engineering
- Energiforskning
- Energy research
- HAT
- Biomass
- Biofuel
- Humidification
- Evaporation
- 'Evaporative gas turbine'
- 'Humid air turbine'
- Termisk teknik
- termodynamik
Status
Published
Handledare
- Tord Torisson
ISBN/ISSN/Övrigt
- ISBN: 91-628-6696-6
- ISRN:LUTMDN/TMHP-05/1035-SE
Försvarsdatum
12 december 2005
Försvarstid
10:15
Försvarsplats
Room M:B, M-huset, Ole Römers Väg 1, Lund Institute of Technology
Opponent
- Andrew Martin (Associate Professor)