Comparative analysis of torque-adding wind energy conversion systems with a counter-rotating vs. conventional electric generator
The paper presents a comparative analysis on the steady-state behavior of two counter-rotating wind turbines with same components, where the generator can operate as a counter-rotating (with both a mobile rotor and stator—Case a) vs. conventional (with a fixed stator—Case b) electric machine. These...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2023-08-01
|
| Series: | Frontiers in Energy Research |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1215509/full |
| _version_ | 1797767550225874944 |
|---|---|
| author | Radu Saulescu Codruta Jaliu Mircea Neagoe Daniela Ciobanu Nadia Cretescu |
| author_facet | Radu Saulescu Codruta Jaliu Mircea Neagoe Daniela Ciobanu Nadia Cretescu |
| author_sort | Radu Saulescu |
| collection | DOAJ |
| description | The paper presents a comparative analysis on the steady-state behavior of two counter-rotating wind turbines with same components, where the generator can operate as a counter-rotating (with both a mobile rotor and stator—Case a) vs. conventional (with a fixed stator—Case b) electric machine. These wind energy conversion systems (WECSs) also have two coaxial counter-rotating wind rotors and a one-degree-of-freedom (1-DOF) planetary speed increaser with two inputs and one or two outputs for compatibility with the considered generator. The paper aims at highlighting the efficiency and energy performances of WECSs with a counter-rotating vs. conventional generator by investigating three functional scenarios (A, B, and C) of the two WECS cases (a and b) under the assumption of identical or different counter-rotating wind rotors. A generalized kinetostatic modeling algorithm is first proposed, starting from the general case of WECS with a counter-rotating generator, which allows the establishment of analytical relationships corresponding to speeds and torques at input and output shafts. Numerical simulations of the obtained closed-form model in each scenario highlighted the influence of the constructive parameters on WECS performances, as well as the energetic superiority of WECS, with a counter-rotating generator (Case a) vs. conventional generator (Case b): higher efficiency by 1.2% and more output power by 1% (Scenario A) to 5.5% (Scenario C). |
| first_indexed | 2024-03-12T20:41:28Z |
| format | Article |
| id | doaj.art-b64e8616f11744f994ea87c3517e317a |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-12T20:41:28Z |
| publishDate | 2023-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-b64e8616f11744f994ea87c3517e317a2023-08-01T09:15:14ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-08-011110.3389/fenrg.2023.12155091215509Comparative analysis of torque-adding wind energy conversion systems with a counter-rotating vs. conventional electric generatorRadu Saulescu0Codruta Jaliu1Mircea Neagoe2Daniela Ciobanu3Nadia Cretescu4Design of Mechanical Elements and Systems R&D Center, Faculty of Product Design and Environment, Transilvania University of Brasov, Brasov, RomaniaRenewable Energy Systems and Recycling R&D Center, Faculty of Product Design and Environment, Transilvania University of Brasov, Brasov, RomaniaRenewable Energy Systems and Recycling R&D Center, Faculty of Product Design and Environment, Transilvania University of Brasov, Brasov, RomaniaRenewable Energy Systems and Recycling R&D Center, Faculty of Product Design and Environment, Transilvania University of Brasov, Brasov, RomaniaRenewable Energy Systems and Recycling R&D Center, Faculty of Product Design and Environment, Transilvania University of Brasov, Brasov, RomaniaThe paper presents a comparative analysis on the steady-state behavior of two counter-rotating wind turbines with same components, where the generator can operate as a counter-rotating (with both a mobile rotor and stator—Case a) vs. conventional (with a fixed stator—Case b) electric machine. These wind energy conversion systems (WECSs) also have two coaxial counter-rotating wind rotors and a one-degree-of-freedom (1-DOF) planetary speed increaser with two inputs and one or two outputs for compatibility with the considered generator. The paper aims at highlighting the efficiency and energy performances of WECSs with a counter-rotating vs. conventional generator by investigating three functional scenarios (A, B, and C) of the two WECS cases (a and b) under the assumption of identical or different counter-rotating wind rotors. A generalized kinetostatic modeling algorithm is first proposed, starting from the general case of WECS with a counter-rotating generator, which allows the establishment of analytical relationships corresponding to speeds and torques at input and output shafts. Numerical simulations of the obtained closed-form model in each scenario highlighted the influence of the constructive parameters on WECS performances, as well as the energetic superiority of WECS, with a counter-rotating generator (Case a) vs. conventional generator (Case b): higher efficiency by 1.2% and more output power by 1% (Scenario A) to 5.5% (Scenario C).https://www.frontiersin.org/articles/10.3389/fenrg.2023.1215509/fullwind turbinecounter-rotating rotorscounter-rotating electric generatortorque-adding speed increasermodelingkinematics |
| spellingShingle | Radu Saulescu Codruta Jaliu Mircea Neagoe Daniela Ciobanu Nadia Cretescu Comparative analysis of torque-adding wind energy conversion systems with a counter-rotating vs. conventional electric generator Frontiers in Energy Research wind turbine counter-rotating rotors counter-rotating electric generator torque-adding speed increaser modeling kinematics |
| title | Comparative analysis of torque-adding wind energy conversion systems with a counter-rotating vs. conventional electric generator |
| title_full | Comparative analysis of torque-adding wind energy conversion systems with a counter-rotating vs. conventional electric generator |
| title_fullStr | Comparative analysis of torque-adding wind energy conversion systems with a counter-rotating vs. conventional electric generator |
| title_full_unstemmed | Comparative analysis of torque-adding wind energy conversion systems with a counter-rotating vs. conventional electric generator |
| title_short | Comparative analysis of torque-adding wind energy conversion systems with a counter-rotating vs. conventional electric generator |
| title_sort | comparative analysis of torque adding wind energy conversion systems with a counter rotating vs conventional electric generator |
| topic | wind turbine counter-rotating rotors counter-rotating electric generator torque-adding speed increaser modeling kinematics |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1215509/full |
| work_keys_str_mv | AT radusaulescu comparativeanalysisoftorqueaddingwindenergyconversionsystemswithacounterrotatingvsconventionalelectricgenerator AT codrutajaliu comparativeanalysisoftorqueaddingwindenergyconversionsystemswithacounterrotatingvsconventionalelectricgenerator AT mirceaneagoe comparativeanalysisoftorqueaddingwindenergyconversionsystemswithacounterrotatingvsconventionalelectricgenerator AT danielaciobanu comparativeanalysisoftorqueaddingwindenergyconversionsystemswithacounterrotatingvsconventionalelectricgenerator AT nadiacretescu comparativeanalysisoftorqueaddingwindenergyconversionsystemswithacounterrotatingvsconventionalelectricgenerator |