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An assessment of subcritical and supercritical organic rankine cycles for waste-heat recovery

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Abstract
Organic Rankine cycle (ORC) systems are increasingly being deployed for waste-heat recovery and conversion in industrial settings. Using a case study of an exhaust flue-gas stream at a temperature of 380 °C as the heat source, an ORC system power output in excess of 10 MW is predicted at exergy efficiencies ranging between 20% and 35%. By comparison with available experimental data, the thermodynamic properties of working fluids are shown to be reliably predicted by the SAFT-VR Mie equation of state. Various cycle configurations and the use of working-fluid mixtures are also investigated. ORC systems operating on supercritical cycles and those incorporating an internal heat exchanger are seen to be beneficial from a thermodynamic perspective, they are, however, more expensive than the simple ORC system considered (subcritical cycle with no internal heat exchanger). Furthermore, ORC systems using pure working fluids are associated with slightly lower costs than those with fluid mixtures. It is concluded that a basic ORC system utilizing pure working fluids shows the lowest specific investment cost in the case study considered.
Keywords
thermo-economic assessment, working-fluid mixtures, trans-critical

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MLA
Oyewunmi, Oyeniyi A., et al. “An Assessment of Subcritical and Supercritical Organic Rankine Cycles for Waste-Heat Recovery.” 8TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY (ICAE2016), vol. 105, 2017, pp. 1870–76.
APA
Oyewunmi, O. A., Ferré-Serres, S., Lecompte, S., van den Broek, M., De Paepe, M., & Markides, C. N. (2017). An assessment of subcritical and supercritical organic rankine cycles for waste-heat recovery. In 8TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY (ICAE2016) (Vol. 105, pp. 1870–1876). Beijing, China.
Chicago author-date
Oyewunmi, Oyeniyi A, Simó Ferré-Serres, Steven Lecompte, Martijn van den Broek, Michel De Paepe, and Christos N Markides. 2017. “An Assessment of Subcritical and Supercritical Organic Rankine Cycles for Waste-Heat Recovery.” In 8TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY (ICAE2016), 105:1870–76. Beijing, China.
Chicago author-date (all authors)
Oyewunmi, Oyeniyi A, Simó Ferré-Serres, Steven Lecompte, Martijn van den Broek, Michel De Paepe, and Christos N Markides. 2017. “An Assessment of Subcritical and Supercritical Organic Rankine Cycles for Waste-Heat Recovery.” In 8TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY (ICAE2016), 105:1870–1876. Beijing, China.
Vancouver
1.
Oyewunmi OA, Ferré-Serres S, Lecompte S, van den Broek M, De Paepe M, Markides CN. An assessment of subcritical and supercritical organic rankine cycles for waste-heat recovery. In: 8TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY (ICAE2016). Beijing, China; 2017. p. 1870–6.
IEEE
[1]
O. A. Oyewunmi, S. Ferré-Serres, S. Lecompte, M. van den Broek, M. De Paepe, and C. N. Markides, “An assessment of subcritical and supercritical organic rankine cycles for waste-heat recovery,” in 8TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY (ICAE2016), Beijing, China, 2017, vol. 105, pp. 1870–1876.
@inproceedings{8115751,
  abstract     = {Organic Rankine cycle (ORC) systems are increasingly being deployed for waste-heat recovery and conversion in industrial settings. Using a case study of an exhaust flue-gas stream at a temperature of 380 °C as the heat source, an ORC system power output in excess of 10 MW is predicted at exergy efficiencies ranging between 20% and 35%. By comparison with available experimental data, the thermodynamic properties of working fluids are shown to be reliably predicted by the SAFT-VR Mie equation of state. Various cycle configurations and the use of working-fluid mixtures are also investigated. ORC systems operating on supercritical cycles and those incorporating an internal heat exchanger are seen to be beneficial from a thermodynamic perspective, they are, however, more expensive than the simple ORC system considered (subcritical cycle with no internal heat exchanger). Furthermore, ORC systems using pure working fluids are associated with slightly lower costs than those with fluid mixtures. It is concluded that a basic ORC system utilizing pure working fluids shows the lowest specific investment cost in the case study considered.},
  author       = {Oyewunmi, Oyeniyi A and Ferré-Serres, Simó and Lecompte, Steven and van den Broek, Martijn and De Paepe, Michel and Markides, Christos N},
  booktitle    = {8TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY (ICAE2016)},
  issn         = {1876-6102},
  keywords     = {thermo-economic assessment,working-fluid mixtures,trans-critical},
  language     = {eng},
  location     = {Beijing, China},
  pages        = {1870--1876},
  title        = {An assessment of subcritical and supercritical organic rankine cycles for waste-heat recovery},
  url          = {http://dx.doi.org/10.1016/j.egypro.2017.03.548},
  volume       = {105},
  year         = {2017},
}

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