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Thermodynamic studies of a HAT cycle and its components

Nyberg, Björn LU and Thern, Marcus LU (2012) In Applied Energy 89(1). p.315-321
Abstract
The electric power grid contains more and more renewable power production such as wind and solar power. The use of renewable power sources increases the fluctuations in the power grid which increase the demand for highly efficient, fast-starting power-producing units that can cope with sudden production losses. One of the more innovative power plant cycles, that have the potential of competing with conventional combined power plants in efficiency but has a higher availability and faster start up time, is the Evaporative Gas Turbine (EvGT) or Humid Air Turbine (HAT). A thermodynamic evaluation of different HAT cycle layouts has been done in this paper. Each layout is evaluated separately which makes it possible to study different components... (More)
The electric power grid contains more and more renewable power production such as wind and solar power. The use of renewable power sources increases the fluctuations in the power grid which increase the demand for highly efficient, fast-starting power-producing units that can cope with sudden production losses. One of the more innovative power plant cycles, that have the potential of competing with conventional combined power plants in efficiency but has a higher availability and faster start up time, is the Evaporative Gas Turbine (EvGT) or Humid Air Turbine (HAT). A thermodynamic evaluation of different HAT cycle layouts has been done in this paper. Each layout is evaluated separately which makes it possible to study different components individual contribution to the efficiency and specific power. The thermodynamic evaluation also shows that it is important to look at different cool-flow extracting positions. The effect of water temperature entering the cycle, called make-up water, and where it is introduced into the cycle has been evaluated. The make-up water temperature also affects the optimal pressure level for intercooling and it is shown that an optimal position can be decided considering design parameters of the compressor and the water circuit. (C) 2011 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Humid Air Turbine, EvGT, Intercooler, Turbine cooling, Makeup water, Cycle analyzis, Cycle performance
in
Applied Energy
volume
89
issue
1
pages
315 - 321
publisher
Elsevier
external identifiers
  • wos:000296114700037
  • scopus:80053324597
ISSN
1872-9118
DOI
10.1016/j.apenergy.2011.07.036
language
English
LU publication?
yes
id
0b78c9bd-5979-408c-ba61-3843f52e3814 (old id 2279042)
date added to LUP
2012-01-11 14:12:40
date last changed
2017-10-22 04:15:49
@article{0b78c9bd-5979-408c-ba61-3843f52e3814,
  abstract     = {The electric power grid contains more and more renewable power production such as wind and solar power. The use of renewable power sources increases the fluctuations in the power grid which increase the demand for highly efficient, fast-starting power-producing units that can cope with sudden production losses. One of the more innovative power plant cycles, that have the potential of competing with conventional combined power plants in efficiency but has a higher availability and faster start up time, is the Evaporative Gas Turbine (EvGT) or Humid Air Turbine (HAT). A thermodynamic evaluation of different HAT cycle layouts has been done in this paper. Each layout is evaluated separately which makes it possible to study different components individual contribution to the efficiency and specific power. The thermodynamic evaluation also shows that it is important to look at different cool-flow extracting positions. The effect of water temperature entering the cycle, called make-up water, and where it is introduced into the cycle has been evaluated. The make-up water temperature also affects the optimal pressure level for intercooling and it is shown that an optimal position can be decided considering design parameters of the compressor and the water circuit. (C) 2011 Elsevier Ltd. All rights reserved.},
  author       = {Nyberg, Björn and Thern, Marcus},
  issn         = {1872-9118},
  keyword      = {Humid Air Turbine,EvGT,Intercooler,Turbine cooling,Makeup water,Cycle analyzis,Cycle performance},
  language     = {eng},
  number       = {1},
  pages        = {315--321},
  publisher    = {Elsevier},
  series       = {Applied Energy},
  title        = {Thermodynamic studies of a HAT cycle and its components},
  url          = {http://dx.doi.org/10.1016/j.apenergy.2011.07.036},
  volume       = {89},
  year         = {2012},
}