Analysis of Radial Inflow Turbine Losses Operating with Supercritical Carbon Dioxide
The losses of supercritical CO<sub>2</sub> radial turbines with design power scales of about 1 MW were investigated by using computational fluid dynamic simulations. The simulation results were compared with loss predictions from enthalpy loss correlations. The aim of the study was to in...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-06-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/14/12/3561 |
| _version_ | 1797530033056645120 |
|---|---|
| author | Antti Uusitalo Aki Grönman |
| author_facet | Antti Uusitalo Aki Grönman |
| author_sort | Antti Uusitalo |
| collection | DOAJ |
| description | The losses of supercritical CO<sub>2</sub> radial turbines with design power scales of about 1 MW were investigated by using computational fluid dynamic simulations. The simulation results were compared with loss predictions from enthalpy loss correlations. The aim of the study was to investigate how the expansion losses are divided between the stator and rotor as well as to compare the loss predictions obtained with the different methods for turbine designs with varying specific speeds. It was observed that a reasonably good agreement between the 1D loss correlations and computational fluid dynamics results can be obtained by using a suitable set of loss correlations. The use of different passage loss models led to high deviations in the predicted rotor losses, especially with turbine designs having the highest or lowest specific speeds. The best agreement in respect to CFD results with the average deviation of less than 10% was found when using the CETI passage loss model. In addition, the other investigated passage loss models provided relatively good agreement for some of the analyzed turbine designs, but the deviations were higher when considering the full specific speed range that was investigated. The stator loss analysis revealed that despite some differences in the predicted losses between the methods, a similar trend in the development of the losses was observed as the turbine specific speed was changed. |
| first_indexed | 2024-03-10T10:23:10Z |
| format | Article |
| id | doaj.art-24b763cf834847c8b07de91d44b8007d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T10:23:10Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-24b763cf834847c8b07de91d44b8007d2023-11-22T00:12:12ZengMDPI AGEnergies1996-10732021-06-011412356110.3390/en14123561Analysis of Radial Inflow Turbine Losses Operating with Supercritical Carbon DioxideAntti Uusitalo0Aki Grönman1School of Energy Systems, LUT University, 53850 Lappeenranta, FinlandSchool of Energy Systems, LUT University, 53850 Lappeenranta, FinlandThe losses of supercritical CO<sub>2</sub> radial turbines with design power scales of about 1 MW were investigated by using computational fluid dynamic simulations. The simulation results were compared with loss predictions from enthalpy loss correlations. The aim of the study was to investigate how the expansion losses are divided between the stator and rotor as well as to compare the loss predictions obtained with the different methods for turbine designs with varying specific speeds. It was observed that a reasonably good agreement between the 1D loss correlations and computational fluid dynamics results can be obtained by using a suitable set of loss correlations. The use of different passage loss models led to high deviations in the predicted rotor losses, especially with turbine designs having the highest or lowest specific speeds. The best agreement in respect to CFD results with the average deviation of less than 10% was found when using the CETI passage loss model. In addition, the other investigated passage loss models provided relatively good agreement for some of the analyzed turbine designs, but the deviations were higher when considering the full specific speed range that was investigated. The stator loss analysis revealed that despite some differences in the predicted losses between the methods, a similar trend in the development of the losses was observed as the turbine specific speed was changed.https://www.mdpi.com/1996-1073/14/12/3561supercritical carbon dioxideradial inflow turbineturbine loss modelsturbomachinery loss |
| spellingShingle | Antti Uusitalo Aki Grönman Analysis of Radial Inflow Turbine Losses Operating with Supercritical Carbon Dioxide Energies supercritical carbon dioxide radial inflow turbine turbine loss models turbomachinery loss |
| title | Analysis of Radial Inflow Turbine Losses Operating with Supercritical Carbon Dioxide |
| title_full | Analysis of Radial Inflow Turbine Losses Operating with Supercritical Carbon Dioxide |
| title_fullStr | Analysis of Radial Inflow Turbine Losses Operating with Supercritical Carbon Dioxide |
| title_full_unstemmed | Analysis of Radial Inflow Turbine Losses Operating with Supercritical Carbon Dioxide |
| title_short | Analysis of Radial Inflow Turbine Losses Operating with Supercritical Carbon Dioxide |
| title_sort | analysis of radial inflow turbine losses operating with supercritical carbon dioxide |
| topic | supercritical carbon dioxide radial inflow turbine turbine loss models turbomachinery loss |
| url | https://www.mdpi.com/1996-1073/14/12/3561 |
| work_keys_str_mv | AT anttiuusitalo analysisofradialinflowturbinelossesoperatingwithsupercriticalcarbondioxide AT akigronman analysisofradialinflowturbinelossesoperatingwithsupercriticalcarbondioxide |