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Potential of Organic Rankine Cycles (ORC) for waste heat recovery on an Electric Arc Furnace (EAF)

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Abstract
The organic Rankine cycle (ORC) is a mature technology to convert low temperature waste heat to electricity. While several energy intensive industries could benefit from the integration of an ORC, their adoption rate is rather low. One important reason is that the prospective end-users find it difficult to recognize and realise the possible energy savings. In more recent years, the electric arc furnaces (EAF) are considered as a major candidate for waste heat recovery. Therefore, in this work, the integration of an ORC coupled to a 100 MWe EAF is investigated. The effect of working with 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 (SCORC) can generate an electricity output of 752 kWe with a steam buffer working at 25 bar. However, the use of a steam buffer also impacts the heat transfer to the ORC. A reduction up to 61.5% in net power output is possible due to the additional isothermal plateau of the steam.
Keywords
ORC, Waste heat recovery, Electric Arc Furnace, Optimization

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Chicago
Lecompte, Steven, Oyeniyi A Oyewunmi, Christos N Markides, Marija Lazova, Alihan Kaya, Bernd Ameel, Martijn van den Broek, and Michel De Paepe. 2017. “Potential of Organic Rankine Cycles (ORC) for Waste Heat Recovery on an Electric Arc Furnace (EAF).” In Proceedings of the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics.
APA
Lecompte, Steven, A Oyewunmi, O., N Markides, C., Lazova, M., Kaya, A., Ameel, B., van den Broek, M., et al. (2017). Potential of Organic Rankine Cycles (ORC) for waste heat recovery on an Electric Arc Furnace (EAF). Proceedings of the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. Presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics.
Vancouver
1.
Lecompte S, A Oyewunmi O, N Markides C, Lazova M, Kaya A, Ameel B, et al. Potential of Organic Rankine Cycles (ORC) for waste heat recovery on an Electric Arc Furnace (EAF). Proceedings of the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. 2017.
MLA
Lecompte, Steven, Oyeniyi A Oyewunmi, Christos N Markides, et al. “Potential of Organic Rankine Cycles (ORC) for Waste Heat Recovery on an Electric Arc Furnace (EAF).” Proceedings of the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics. 2017. Print.
@inproceedings{8527806,
  abstract     = {The organic Rankine cycle (ORC) is a mature technology to convert low temperature waste heat to electricity. While several energy intensive industries could benefit from the integration of an ORC, their adoption rate is rather low. One important reason is that the prospective end-users find it difficult to recognize and realise the possible energy savings. In more recent years, the electric arc furnaces (EAF) are considered as a major candidate for waste heat recovery. Therefore, in this work, the integration of an ORC coupled to a 100 MWe EAF is investigated. The effect of working with 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 (SCORC) can generate an electricity output of 752 kWe with a steam buffer working at 25 bar. However, the use of a steam buffer also impacts the heat transfer to the ORC. A reduction up to 61.5\% in net power output is possible due to the additional isothermal plateau of the steam.},
  author       = {Lecompte, Steven and A Oyewunmi, Oyeniyi and N Markides, Christos and Lazova, Marija and Kaya, Alihan and Ameel, Bernd and van den Broek, Martijn and De Paepe, Michel},
  booktitle    = {Proceedings of the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics},
  language     = {eng},
  location     = {Portoro\v{z}, Slovenia},
  title        = {Potential of Organic Rankine Cycles (ORC) for waste heat recovery on an Electric Arc Furnace (EAF)},
  year         = {2017},
}