CFD simulation of scroll expanders: Influence of pressure ratio and flank clearance over the performance

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dc.contributor.authorOLIVEIRA, F. V.
dc.contributor.authorSILVA, F. M. F.
dc.contributor.authorPaulo de Mello
dc.contributor.authorOrcidhttps://repositorio.fei.edu.br/handle/FEI/4886
dc.date.accessioned2023-08-26T23:48:03Z
dc.date.available2023-08-26T23:48:03Z
dc.date.issued2019-06-23
dc.description.abstract© ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. All rights reserved.Scroll expanders are considered ideal for low power applications, in particular in small scale ORC (organic Rankine cycle). Internal leakages decrease considerably the isentropic efficiency of scroll expanders and consist the main source of inefficiency. In this paper, the performance of one scroll expander working with air for which experimental data is available is simulated. The influence of pressure ratio and tangential clearance over the results is investigated. Transient 2D CFD (computational fluid dynamics) simulations of the compressible flow capable of quantifying the internal leakages present in this machine were performed. The filling factor, generated power and isentropic efficiency were obtained and compared with experimental results from our research group. The results obtained reveal that the pressure ratio variation does not change the filling factor, thereby the internal leakages remain practically constants with the inlet pressure increase. The pressure ratio value for which the highest isentropic efficiency is obtained tends to reduce when increasing the internal leakages. The CFD simulations have shown generated power 11% higher if compared with experimental results. This difference can be attributed to uncertainty in tangential clearance measurements, radial leakage and pressure drop at expander inlet not considered in the 2D simulations.
dc.description.firstpage429
dc.description.lastpage440
dc.identifier.citationOLIVEIRA, F. V.; SILVA, F. M. F.; MELLO, P. CFD simulation of scroll expanders: influence of pressure ratio and flank clearance over the performance. ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, p. 429-440, jun. 2019.
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/4886
dc.relation.ispartofECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
dc.rightsAcesso Restrito
dc.subject.otherlanguageCFD simulation
dc.subject.otherlanguageInternal leakage
dc.subject.otherlanguageORC
dc.subject.otherlanguagePressure ratio
dc.subject.otherlanguageScroll expander
dc.titleCFD simulation of scroll expanders: Influence of pressure ratio and flank clearance over the performance
dc.typeArtigo de evento
fei.scopus.citations0
fei.scopus.eid2-s2.0-85079695752
fei.scopus.subjectCFD (computational fluid dynamics)
fei.scopus.subjectCFD simulations
fei.scopus.subjectInternal leakage
fei.scopus.subjectIsentropic efficiency
fei.scopus.subjectLow power application
fei.scopus.subjectOrganic Rankine cycles
fei.scopus.subjectPressure ratio
fei.scopus.subjectScroll expander
fei.scopus.updated2024-07-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85079695752&origin=inward
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