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Case study of an Organic Rankine Cycle (ORC) for waste heat Recovery from an Electric Arc Furnace (EAF)

Steven Lecompte UGent, Oyeniyi Oyewunmi, Christos Markides, Marija Lazova UGent, Alihan Kaya UGent, Martijn van den Broek UGent and Michel De Paepe UGent (2017) ENERGIES . 10(5).
abstract
The organic Rankine cycle (ORC) is a mature technology for the conversion of waste heat to electricity. Although many energy intensive industries could benefit significantly from the integration of ORC technology, its current adoption rate is limited. One important reason for this arises from the difficulty of prospective investors and end-users to recognize and, ultimately, realise the potential energy savings from such deployment. In recent years, electric arc furnaces (EAF) have been identified as particularly interesting candidates for the implementation of waste heat recovery projects. Therefore, in this work, the integration of an ORC system into a 100 MWe EAF is investigated. The effect of evaluations based on averaged heat profiles, a steam buffer and optimized ORC architectures is investigated. The results show that it is crucial to take into account the heat profile variations for the typical batch process of an EAF. An optimized subcritical ORC system is found capable of generating a net electrical output of 752 kWe with a steam buffer working at 25 bar. If combined heating is considered, the ORC system can be optimized to generate 521 kWe of electricity, while also delivering 4.52 MW of heat. Finally, an increased power output (by 26% with combined heating, and by 39% without combined heating) can be achieved by using high temperature thermal oil for buffering instead of a steam loop; however, the use of thermal oil in these applications has been until now typically discouraged due to flammability concerns.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
organic Rankine cycle, ORC, electric arc furnace, case study, AEF, waste heat, optimization, architectures
journal title
ENERGIES
editor
Francesco Calise
volume
10
issue
5
publisher
MDPI AG
ISSN
1996-1073
DOI
10.3390/en10050649
language
English
UGent publication?
yes
classification
A1
copyright statement
Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
id
8519842
handle
http://hdl.handle.net/1854/LU-8519842
alternative location
http://www.mdpi.com/1996-1073/10/5/649
date created
2017-05-09 07:12:34
date last changed
2017-05-11 08:03:54
@article{8519842,
  abstract     = {The organic Rankine cycle (ORC) is a mature technology for the conversion of waste heat to electricity. Although many energy intensive industries could benefit significantly from the integration of ORC technology, its current adoption rate is limited. One important reason for this arises from the difficulty of prospective investors and end-users to recognize and, ultimately, realise the potential energy savings from such deployment. In recent years, electric arc furnaces (EAF) have been identified as particularly interesting candidates for the implementation of waste heat recovery projects. Therefore, in this work, the integration of an ORC system into a 100 MWe EAF is investigated. The effect of evaluations based on averaged heat profiles, a steam buffer and optimized ORC architectures is investigated. The results show that it is crucial to take into account the heat profile variations for the typical batch process of an EAF. An optimized subcritical ORC system is found capable of generating a net electrical output of 752 kWe with a steam buffer working at 25 bar. If combined heating is considered, the ORC system can be optimized to generate 521 kWe of electricity, while also delivering 4.52 MW of heat. Finally, an increased power output (by 26\% with combined heating, and by 39\% without combined heating) can be achieved by using high temperature thermal oil for buffering instead of a steam loop; however, the use of thermal oil in these applications has been until now typically discouraged due to flammability concerns.},
  author       = {Lecompte, Steven and Oyewunmi, Oyeniyi and Markides, Christos and Lazova, Marija and Kaya, Alihan and van den Broek, Martijn and De Paepe, Michel},
  editor       = { Calise, Francesco},
  issn         = {1996-1073},
  journal      = {ENERGIES                              },
  keyword      = {organic Rankine cycle,ORC,electric arc furnace,case study,AEF,waste heat,optimization,architectures},
  language     = {eng},
  number       = {5},
  publisher    = {MDPI AG},
  title        = {Case study of an Organic Rankine Cycle (ORC) for waste heat Recovery from an Electric Arc Furnace (EAF)},
  url          = {http://dx.doi.org/10.3390/en10050649},
  volume       = {10},
  year         = {2017},
}

Chicago
Lecompte, Steven, Oyeniyi Oyewunmi, Christos Markides, Marija Lazova, Alihan Kaya, Martijn van den Broek, and Michel De Paepe. 2017. “Case Study of an Organic Rankine Cycle (ORC) for Waste Heat Recovery from an Electric Arc Furnace (EAF).” Ed. Francesco Calise. Energies  10 (5).
APA
Lecompte, Steven, Oyewunmi, O., Markides, C., Lazova, M., Kaya, A., van den Broek, M., & De Paepe, M. (2017). Case study of an Organic Rankine Cycle (ORC) for waste heat Recovery from an Electric Arc Furnace (EAF). (F. Calise, Ed.)ENERGIES  , 10(5).
Vancouver
1.
Lecompte S, Oyewunmi O, Markides C, Lazova M, Kaya A, van den Broek M, et al. Case study of an Organic Rankine Cycle (ORC) for waste heat Recovery from an Electric Arc Furnace (EAF). Calise F, editor. ENERGIES  . MDPI AG; 2017;10(5).
MLA
Lecompte, Steven, Oyeniyi Oyewunmi, Christos Markides, et al. “Case Study of an Organic Rankine Cycle (ORC) for Waste Heat Recovery from an Electric Arc Furnace (EAF).” Ed. Francesco Calise. ENERGIES  10.5 (2017): n. pag. Print.