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Derivation of a correlation to determine a combined cycle's performance based on data from the gas turbine exhaust

Ingelström, Mattias LU (2019) MVKM01 20191
Department of Energy Sciences
Abstract
Power production has a vital role in the functioning of society and will have a major part in the future of environmental and economical sustainability. Therefore, efficiencies of power plants are always a subject to improvements in order to utilise resources as efficient as possible. A Combined Cycle, combining a gas turbine topping cycle and a steam turbine bottoming cycle, is a widely used configuration for producing electricity at a high efficiency. It is not enough to have an understanding of the improvements on the efficiencies of both cycles individually, but also the interaction between them. When a gas turbine is to be chosen in a design process, for a new power plant or for an upgrade to an existing one, it is difficult to make... (More)
Power production has a vital role in the functioning of society and will have a major part in the future of environmental and economical sustainability. Therefore, efficiencies of power plants are always a subject to improvements in order to utilise resources as efficient as possible. A Combined Cycle, combining a gas turbine topping cycle and a steam turbine bottoming cycle, is a widely used configuration for producing electricity at a high efficiency. It is not enough to have an understanding of the improvements on the efficiencies of both cycles individually, but also the interaction between them. When a gas turbine is to be chosen in a design process, for a new power plant or for an upgrade to an existing one, it is difficult to make an accurate and instantaneous estimation of the Combined Cycle efficiency. This report presents a method to estimate the efficiency down to a thousandth of a percent for a selection of constellations of Combined Cycles without any complex calculation processes. The second law efficiency proved to be the key to correlate changes of parameters resulting in a powerful method that will make accurate predictions of the efficiency for a wide set of power plants. (Less)
Popular Abstract (Swedish)
Idag har det blivit otroligt viktigt med ett miljömässigt ansvarstagande, speciellt vad gäller elproduktion. Här presenteras ett arbete där prestandabedömningen av dagens mest termodynamiskt effektiva fossila kraftverk, kombikraftverk, revolutioneras.
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author
Ingelström, Mattias LU
supervisor
organization
course
MVKM01 20191
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Combined Cycle efficiency, second law efficiency, HRSG, exergy, irreversibilities
report number
LUTMDN/TMHP-19/5437-SE
ISSN
0282-1990
language
English
id
8981886
date added to LUP
2019-06-11 14:16:00
date last changed
2019-06-11 14:16:00
@misc{8981886,
  abstract     = {Power production has a vital role in the functioning of society and will have a major part in the future of environmental and economical sustainability. Therefore, efficiencies of power plants are always a subject to improvements in order to utilise resources as efficient as possible. A Combined Cycle, combining a gas turbine topping cycle and a steam turbine bottoming cycle, is a widely used configuration for producing electricity at a high efficiency. It is not enough to have an understanding of the improvements on the efficiencies of both cycles individually, but also the interaction between them. When a gas turbine is to be chosen in a design process, for a new power plant or for an upgrade to an existing one, it is difficult to make an accurate and instantaneous estimation of the Combined Cycle efficiency. This report presents a method to estimate the efficiency down to a thousandth of a percent for a selection of constellations of Combined Cycles without any complex calculation processes. The second law efficiency proved to be the key to correlate changes of parameters resulting in a powerful method that will make accurate predictions of the efficiency for a wide set of power plants.},
  author       = {Ingelström, Mattias},
  issn         = {0282-1990},
  keyword      = {Combined Cycle efficiency,second law efficiency,HRSG,exergy,irreversibilities},
  language     = {eng},
  note         = {Student Paper},
  title        = {Derivation of a correlation to determine a combined cycle's performance based on data from the gas turbine exhaust},
  year         = {2019},
}