Design and verification of a hermetic high-speed turbogenerator concept for biomass and waste heat recovery applications
| Autor: | Teemu Turunen-Saaresti, Rafal P. Jastrzebski, Jussi Sopanen, Juha Pyrhonen, Juha Honkatukia, Janne Nerg, Alexander Smirnov, Eero Scherman, Antti Uusitalo, Jari Backman, Eerik Sikanen, Janne Heikkinen, Aki Grönman, Nikita Uzhegov, Petri Sallinen, Niko Nevaranta, Olli Pyrhonen, Teemu Sillanpää |
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| Přispěvatelé: | Lappeenrannan-Lahden teknillinen yliopisto LUT, Lappeenranta-Lahti University of Technology LUT, fi=School of Energy Systems|en=School of Energy Systems |
| Rok vydání: | 2020 |
| Předmět: |
Computer science
020209 energy Steam turbine Energy Engineering and Power Technology Magnetic bearing 02 engineering and technology Turbine law.invention Waste heat recovery unit Active magnetic bearings 020401 chemical engineering law Radial outflow turbine 0202 electrical engineering electronic engineering information engineering Water cooling Biomass 0204 chemical engineering Process engineering Waste heat recovery High-speed generator Renewable Energy Sustainability and the Environment business.industry Rotor (electric) Fuel Technology Nuclear Energy and Engineering Electricity business Efficient energy use |
| Zdroj: | Energy Conversion and Management. 225:113427 |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2020.113427 |
| Popis: | Many waste heat recovery and biomass applications offer opportunities for small-scale steam turbines to produce electricity and to improve systems’ energy efficiency. However, the currently used axial turbine-based technology is generally characterized by a relatively large physical size and poor design and off-design performances. To overcome these challenges, a new compact water-cooled high-speed radial outflow turbine concept is proposed. While the previous understanding of the chosen novel rotor water cooling approach indicates general system feasibility, improved turbine performance, and good potential, the scientific literature lacks relevant information. Since the design of high-speed machines is always case-dependent, every concept must be verified. Hence, to provide verification and new scientific information, this study combines analytical, numerical, and experimental analyses. The results predict turbine performance levels comparable with the previous radial outflow design, and its efficiency was found to exceed those of conventional turbines. During the experiments, the turbine also produced electricity from poor-quality steam, and its rotor dynamic behavior and magnetic bearing performance were close to the predicted results. These findings are considered a verification of the proposed concept. Furthermore, the rotor water cooling approach improved the stability of the system operation and although its physical behavior was not fully resolved, the study was able to verify its feasibility. In addition, at below 200 € /kW, the turbogenerator costs are competitive against competing technologies. Post-print / Final draft |
| Databáze: | OpenAIRE |
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