Evaluate the validity of the empirical correlations of clearance and friction coefficients to improve a scroll expander semi-empirical model

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dc.authoridKutlu, Cagri/0000-0002-8462-0420
dc.authoridLI, JING/0000-0001-6422-3332
dc.contributor.authorKutlu, Cagri
dc.contributor.authorErdinc, Mehmet Tahir
dc.contributor.authorLi, Jing
dc.contributor.authorSu, Yuehong
dc.contributor.authorPei, Gang
dc.contributor.authorGao, Guangtao
dc.contributor.authorRiffat, Saffa
dc.date.accessioned2025-03-17T12:27:18Z
dc.date.available2025-03-17T12:27:18Z
dc.date.issued2020
dc.departmentTarsus Üniversitesi
dc.description2nd International Scientific Conference on Alternative Energy Sources, Materials and Technologies (AESMT) -- JUN 03-04, 2019--AG289 Sofia, BULGARIA
dc.description.abstractThis study presents a scroll expander modelling methodology for small scale power generation systems by combining scroll geometry and semi-empirical model. Although the semi-empirical model is quite popular, its dependence on several experimentally-determined scroll geometrical and operational parameters makes this approach inflexible for different capacities and operating conditions. Some studies have sought to improve its flexibility in terms of using different working fluids and more accurate empirical parameters, however, those improved models still depend on a considerable number of experimentally-obtained scroll parameters. Therefore, in this study, a practical methodology for a simpler semi-empirical model combined with the operational flexibility of the scroll geometry is presented. Firstly, the flow rates of mainstream and leakage flows are analysed, where a correlation between scroll clearance and pressure ratio is determined. Secondly, a simpler approach to the semi-empirical model of scroll expander is proposed, whereby dependent parameters have been reduced to two parameters by using scroll geometrical calculations. The model is further improved to predict the rotational speed and electricity output by considering the overall friction coefficient of the coupled expander-generator unit. The findings are then compared with the results of an experimental study. The results show that the effective clearance values between scrolls vary according to pressure ratios, increasing from 20 mm to 34 mm. Mass flow rate can be predicted within 10% deviation from the experimental results for the same inlet conditions and rotational speed at a transient state. Additionally, considering steady state conditions, modelling results show that the rotational speed and electricity output can also be predicted within 8% and 7.5% of deviation, respectively. (C) 2020 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipEuropean Commission [H2020-MSCA-IF-2014-658217, H2020-MSCA-IF-2015-703746]
dc.description.sponsorshipThe authors would like to thank the European Commission for the Marie Curie Fellowship grant (H2020-MSCA-IF-2014-658217, H2020-MSCA-IF-2015-703746).
dc.identifier.doi10.1016/j.energy.2020.117723
dc.identifier.issn0360-5442
dc.identifier.issn1873-6785
dc.identifier.scopus2-s2.0-85084197667
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.energy.2020.117723
dc.identifier.urihttps://hdl.handle.net/20.500.13099/2188
dc.identifier.volume202
dc.identifier.wosWOS:000538592700054
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofEnergy
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250316
dc.subjectClearance
dc.subjectEmpirical correlation
dc.subjectLeakage area
dc.subjectFriction coefficient
dc.subjectScroll geometry
dc.subjectSemi-empirical model
dc.titleEvaluate the validity of the empirical correlations of clearance and friction coefficients to improve a scroll expander semi-empirical model
dc.typeConference Object

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