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Performance evaluation of organic Rankine cycle architectures: application to waste heat valorisation

Steven Lecompte UGent (2016)
abstract
In our society, there is an ever increasing need for electricity. However, today most of the electricity is generated by burning fossil fuels in a thermal power plant. A proposed alternative is to make use of low temperature heat from renewable sources (geothermal and solar) or waste heat (excess heat that is dumped into the atmosphere) in an organic Rankine cycle (ORC) to generate electricity. The purpose of the presented work is to support further adoption of ORC technology. To achieve this, two main challenges need to be resolved. First, sound criteria should be devised to compare and size ORCs and secondly the performance of the ORC should be increased further. From literature it is clear that novel ORC architectures have the opportunity to increase the performance of the basic subcritical ORC. However these studies are not cross comparable. As such, a new screening approach is created which rigorously compares and quantifies the potential of three different ORC architectures. Secondly, the sizing and the financial appraisal of the ORC is tackled by introducing a multi-objective optimization which combines financial and thermodynamic criteria in the optimization objectives. Finally, experimentally validated part-load models of the ORC were developed. These part-load models are crucial to predict the actual power output of time varying heat sources like waste heat streams. In addition, the models permit to investigate the concept of retrofitting existing subcritical ORCs to work under the more optimal working regime of partial evaporation.
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author
promoter
UGent and UGent
organization
alternative title
Performantie-evaluatie van organische-Rankine-cyclusarchitecturen : toepassing op restwarmtevalorisatie
year
type
dissertation
publication status
published
subject
keyword
organic Rankine cycle, numerical optimization, thermodynamics, experimental, thermo-economic
pages
XXXI, 239 pages
publisher
Ghent University. Faculty of Engineering and Architecture
place of publication
Ghent, Belgium
defense location
Gent : Instituut der Wetenschappen (Jozef Plateaustraat 22, Jozef Plateauzaal)
defense date
2016-05-23 16:00
ISBN
9789085788973
project
IWT SBO-110006
language
English
UGent publication?
yes
classification
D1
copyright statement
I have retained and own the full copyright for this publication
id
7223134
handle
http://hdl.handle.net/1854/LU-7223134
date created
2016-05-23 10:54:30
date last changed
2017-01-16 10:51:08
@phdthesis{7223134,
  abstract     = {In our society, there is an ever increasing need for electricity. However, today most of the electricity is generated by burning fossil fuels in a thermal power plant. A proposed alternative is to make use of low temperature heat from renewable sources (geothermal and solar) or waste heat (excess heat that is dumped into the atmosphere) in an organic Rankine cycle (ORC) to generate electricity. The purpose of the presented work is to support further adoption of ORC technology. To achieve this, two main challenges need to be resolved. First, sound criteria should be devised to compare and size ORCs and secondly the performance of the ORC should be increased further. From literature it is clear that novel ORC architectures have the opportunity to increase the performance of the basic subcritical ORC. However these studies are not cross comparable. As such, a new screening approach is created which rigorously compares and quantifies the potential of three different ORC architectures. Secondly, the sizing and the financial appraisal of the ORC is tackled by introducing a multi-objective optimization which combines financial and thermodynamic criteria in the optimization objectives. Finally, experimentally validated part-load models of the ORC were developed. These part-load models are crucial to predict the actual power output of time varying heat sources like waste heat streams. In addition, the models permit to investigate the concept of retrofitting existing subcritical ORCs to work under the more optimal working regime of partial evaporation.},
  author       = {Lecompte, Steven},
  isbn         = {9789085788973},
  keyword      = {organic Rankine cycle,numerical optimization,thermodynamics,experimental,thermo-economic},
  language     = {eng},
  pages        = {XXXI, 239},
  publisher    = {Ghent University. Faculty of Engineering and Architecture},
  school       = {Ghent University},
  title        = {Performance evaluation of organic Rankine cycle architectures: application to waste heat valorisation},
  year         = {2016},
}

Chicago
Lecompte, Steven. 2016. “Performance Evaluation of Organic Rankine Cycle Architectures: Application to Waste Heat Valorisation”. Ghent, Belgium: Ghent University. Faculty of Engineering and Architecture.
APA
Lecompte, Steven. (2016). Performance evaluation of organic Rankine cycle architectures: application to waste heat valorisation. Ghent University. Faculty of Engineering and Architecture, Ghent, Belgium.
Vancouver
1.
Lecompte S. Performance evaluation of organic Rankine cycle architectures: application to waste heat valorisation. [Ghent, Belgium]: Ghent University. Faculty of Engineering and Architecture; 2016.
MLA
Lecompte, Steven. “Performance Evaluation of Organic Rankine Cycle Architectures: Application to Waste Heat Valorisation.” 2016 : n. pag. Print.