Numerical Study of Multistage Transcritical Organic Rankine Cycle Axial Turbines
dc.contributor.author
hal.structure.identifier | CINNELLA, Paola
|
dc.contributor.author | SCIACOVELLI, Luca |
dc.date.accessioned | 2015 |
dc.date.available | 2017 |
dc.date.issued | 2014 |
dc.date.submitted | 2015 |
dc.identifier.issn | 0742-4795 |
dc.identifier.uri | http://hdl.handle.net/10985/10145 |
dc.description.abstract | Transonic flows through axial, multi-stage, transcritical ORC turbines, are investigated by using a numerical solver including advanced multiparameter equations of state and a high-order discretization scheme. The working fluids in use are the refrigerants R134a and R245fa, classified as dense gases due to their complex molecules and relatively high molecular weight. Both inviscid and viscous numerical simulations are carried out to quantify the impact of dense gas effects and viscous effects on turbine performance. Both supercritical and subcritical inlet conditions are studied for the considered working fluids. In the former case, flow across the turbine is transcritical, since turbine output pressure is subcritical. Numerical results show that, due to dense gas effects characterizing the flow at supercritical inlet conditions, supercritical ORC turbines enable, for a given pressure ratio, a higher isentropic efficiency than subcritical turbines using the same working fluid. Moreover, for the selected operating conditions, R134a provides a better performance than R245fa. |
dc.description.sponsorship | ADEME-PROJET SURORC |
dc.language.iso | en |
dc.publisher | American Society of Mechanical Engineers |
dc.rights | Post-print |
dc.title | Numerical Study of Multistage Transcritical Organic Rankine Cycle Axial Turbines |
dc.identifier.doi | 10.1115/1.4026804 |
dc.typdoc | Article dans une revue avec comité de lecture |
dc.localisation | Centre de Paris |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des fluides |
ensam.audience | Internationale |
ensam.page | 082604-1 |
ensam.journal | Journal of Engineering for Gas Turbines and Power |
ensam.volume | 082604-8 |
ensam.issue | 136 |
hal.status | unsent |