Imperial College London


Faculty of EngineeringDepartment of Chemical Engineering

Professor of Clean Energy Technologies



+44 (0)20 7594 1601c.markides Website




404ACE ExtensionSouth Kensington Campus






BibTex format

author = {Oyewunmi, OA and Simó, Ferré-Serres and Steven, Lecompte and Martijn, van den Broek and Michel, De Paepe and Markides, CN},
publisher = {Elsevier},
title = {An assessment of subcritical and trans-critical organic Rankine cycles for waste-heat recovery},
url = {},
year = {2017}

RIS format (EndNote, RefMan)

AB - 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 streamat a temperature of 380 °C as the heat source, an ORC system power output in excess of 10MW is predicted at exergy efficiencies ranging between 20% and 35%. By comparison with available experimental data, the thermodynamic properties (including those in the supercritical region) of working fluids are shown to be reliably predicted by the SAFT-VR Mie equation of state; this verification is quite important as this is the first time that the SAFT-VR Mie equation of state is used forthermodynamic property predictionof working fluids in their supercriticalstateintrans-critical ORC systems.Various cycle configurations and the use of working-fluid mixtures are also investigated. ORC systems operating on trans-critical cycles and those incorporating an internal heat exchanger(IHE)are seen to be beneficial from a thermodynamic perspective, they are,however,more expensive than the simpleORC system considered (subcritical cycle with no IHE).Furthermore, ORC systems using pure working fluids are associated withslightly lower costs than those with fluid mixtures. It is concluded thatabasicORCsystem utilizingpure working fluidsshowsthe lowest specific investment cost(SIC)in the case study considered.
AU - Oyewunmi,OA
AU - Simó,Ferré-Serres
AU - Steven,Lecompte
AU - Martijn,van den Broek
AU - Michel,De Paepe
AU - Markides,CN
PB - Elsevier
PY - 2017///
SN - 1876-6102
TI - An assessment of subcritical and trans-critical organic Rankine cycles for waste-heat recovery
UR -
ER -