Reference : Modelling of organic Rankine cycle power systems in off-design conditions: an experim...
Scientific journals : Article
Engineering, computing & technology : Energy
http://hdl.handle.net/2268/207441
Modelling of organic Rankine cycle power systems in off-design conditions: an experimentally-validated comparative study
English
[fr] Modélisation de systèmes utilisant un cycle de Rankine organique dans des conditions de fonctionement off-design - une étude comparative validée expérimentalement
Dickes, Rémi mailto [Université de Liège > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
Dumont, Olivier mailto [Université de Liège > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
Daccord, Rémi [Exoès > > > >]
Quoilin, Sylvain mailto [Université de Liège > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
Lemort, Vincent mailto [Université de Liège > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
15-Mar-2017
Energy
Pergamon Press - An Imprint of Elsevier Science
123
710-727
Yes (verified by ORBi)
International
0360-5442
Oxford
United Kingdom
[en] Organic Rankine Cycle ; Modelling ; off-design ; Experimental data ; Simulation
[en] Because of environmental issues and the depletion of fossil fuels, the world energy sector is undergoing many changes toward increased sustainability. Among the many fields of research and development, power generation from low-grade heat sources is gaining interest and the organic Rankine cycle (ORC) is seen as one of the most promising technologies for such applications. In this paper, it is proposed to perform an experimentally-validated comparison of different modelling methods for the off-design simulation of ORC-based power systems. To this end, three types of modelling paradigms (namely a constant-efficiency method, a polynomial-based method and a semi-empirical method) are compared both in terms of their fitting and extrapolation capabilities. Post-processed measurements gathered on two experimental ORC facilities are used as reference for the models calibration and evaluation. The study is first applied at a component level (i.e. each component is analysed individually) and then extended to the characterization of the entire organic Rankine cycle power systems. Benefits and limi- tations of each modelling method are discussed. The results show that semi-empirical models are the most reliable for simulating the off-design working conditions of ORC systems, while constant-efficiency and polynomial-based models are both demonstrating lack of accuracy and/or robustness.
Laboratoire de Thermodynamique, Université de Liège
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/207441
10.1016/j.energy.2017.01.130
http://www.sciencedirect.com/science/article/pii/S0360544217301378

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