Evaluating a Meanline Model for Partially Admitted Axial Turbines Operating in Organic Rankine Cycles: Extensive Experimental Validation with Multiple Working Fluids and Mixtures.
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| Title: | Evaluating a Meanline Model for Partially Admitted Axial Turbines Operating in Organic Rankine Cycles: Extensive Experimental Validation with Multiple Working Fluids and Mixtures. |
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| Authors: | Gautier, Robin1 (AUTHOR), Tauveron, Nicolas1 (AUTHOR) nicolas.tauveron@cea.fr |
| Source: | Energies (19961073). Feb2026, Vol. 19 Issue 3, p625. 23p. |
| Subject Terms: | *Working fluids, *Turbines, *Rankine cycle, *Turbine efficiency, *Azeotropes, *Scientific method |
| Abstract: | This study aims to evaluate the robustness of the well proved Aungier meanline model, originally developed for air and steam turbines, on Organic Rankine Cycles (ORC) turbines. More specifically, the study focuses on two pure-impulse axial turbines with partial admission and using various working fluids, including zeotropic mixtures. To this end, a three-part numerical model was developed to adapt this type of meanline model to a prediction-oriented methodology rather than a design-oriented one. Using inlet and outlet pressures, inlet temperature, and rotational speed as inputs, the model provides the resulting mass flow rate through the turbine as well as its performance characteristics. The model predictions are compared against an extensive experimental dataset comprising more than 300 operating points obtained with three pure fluids—R1233zd(E), NOVEC™ 649, and HFE7000—and three zeotropic mixtures. The model demonstrates good predictive accuracy over a wide range of operating conditions, including very low velocity ratios corresponding to severe off-design operation. Specifically, the mass flow rate is predicted with a Mean Absolute Percentage Error (MAPE) ranging from 1.23% to 3.31%, depending on the working fluid. Furthermore, over an experimental specific work range of 5 to 15 kJ/kg, the predicted numerical work exhibits a MAPE of 7.04% for 102 experimental points corresponding to the main dataset (R1233zd(E)). Finally, the total-to-total efficiency is predicted within ±4 efficiency points, showing a very good trend over a velocity ratio range from 0.06 to 0.36. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 191587104 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Evaluating a Meanline Model for Partially Admitted Axial Turbines Operating in Organic Rankine Cycles: Extensive Experimental Validation with Multiple Working Fluids and Mixtures. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Gautier%2C+Robin%22">Gautier, Robin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tauveron%2C+Nicolas%22">Tauveron, Nicolas</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nicolas.tauveron@cea.fr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Feb2026, Vol. 19 Issue 3, p625. 23p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Working+fluids%22">Working fluids</searchLink><br />*<searchLink fieldCode="DE" term="%22Turbines%22">Turbines</searchLink><br />*<searchLink fieldCode="DE" term="%22Rankine+cycle%22">Rankine cycle</searchLink><br />*<searchLink fieldCode="DE" term="%22Turbine+efficiency%22">Turbine efficiency</searchLink><br />*<searchLink fieldCode="DE" term="%22Azeotropes%22">Azeotropes</searchLink><br />*<searchLink fieldCode="DE" term="%22Scientific+method%22">Scientific method</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This study aims to evaluate the robustness of the well proved Aungier meanline model, originally developed for air and steam turbines, on Organic Rankine Cycles (ORC) turbines. More specifically, the study focuses on two pure-impulse axial turbines with partial admission and using various working fluids, including zeotropic mixtures. To this end, a three-part numerical model was developed to adapt this type of meanline model to a prediction-oriented methodology rather than a design-oriented one. Using inlet and outlet pressures, inlet temperature, and rotational speed as inputs, the model provides the resulting mass flow rate through the turbine as well as its performance characteristics. The model predictions are compared against an extensive experimental dataset comprising more than 300 operating points obtained with three pure fluids—R1233zd(E), NOVEC™ 649, and HFE7000—and three zeotropic mixtures. The model demonstrates good predictive accuracy over a wide range of operating conditions, including very low velocity ratios corresponding to severe off-design operation. Specifically, the mass flow rate is predicted with a Mean Absolute Percentage Error (MAPE) ranging from 1.23% to 3.31%, depending on the working fluid. Furthermore, over an experimental specific work range of 5 to 15 kJ/kg, the predicted numerical work exhibits a MAPE of 7.04% for 102 experimental points corresponding to the main dataset (R1233zd(E)). Finally, the total-to-total efficiency is predicted within ±4 efficiency points, showing a very good trend over a velocity ratio range from 0.06 to 0.36. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=191587104 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en19030625 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 625 Subjects: – SubjectFull: Working fluids Type: general – SubjectFull: Turbines Type: general – SubjectFull: Rankine cycle Type: general – SubjectFull: Turbine efficiency Type: general – SubjectFull: Azeotropes Type: general – SubjectFull: Scientific method Type: general Titles: – TitleFull: Evaluating a Meanline Model for Partially Admitted Axial Turbines Operating in Organic Rankine Cycles: Extensive Experimental Validation with Multiple Working Fluids and Mixtures. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Gautier, Robin – PersonEntity: Name: NameFull: Tauveron, Nicolas IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 19 – Type: issue Value: 3 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
