Deriaz turbine

The Deriaz turbine, presented by engineer Paul Deriaz, was the first diagonal hydraulic pump-turbine to be designed.[1][2] In contrast to most hydraulic machines, the flow in a Deriaz turbine does not follow a full axial nor radial direction but is a diagonal mixture of the two. Deriaz turbines, like Kaplan turbines, have also adjustable runner blades. Deriaz turbines are installed at the Sir Adam Beck Pump Generating Station at Niagara Falls.[3]

The combined use of adjustable runner blades with moving guide vanes allows Deriaz pump-turbine to reach high performance under a large range of working conditions. This makes the Deriaz pump-turbine an extremely suitable turbomachine solution for high variable load.[4] Recent investigation supported by experimental data and computational fluid dynamics (CFD) simulations, shows clearly how a downsized prototype preserves versatility over a wide range of partial load for pumping and generating modes.[4]

References
  1. US patent 2801068, Deriaz, Paul, "Control of feathering runner vanes of hydraulic turbines and pumps", issued 1957-07-30
  2. Deriaz, Paul (1955-12-02). "La turbine-pompe réversible axio-centrifuge à pas variable: le développement d'une nouvelle machine hydraulique". Bull. Tech. Suisse Romande Ecole Polytechnique Federale Zurich: Centenaire 1855–1955. doi:10.5169/seals-61375.
  3. Maricic, T.; Haber, D.; Pejovic, S. (October 2009). "Niagara Pump Generating Station proven functionality unique in Canada". 2009 IEEE Electrical Power Energy Conference (EPEC): 1–6. doi:10.1109/EPEC.2009.5420377. ISBN 978-1-4244-4508-0.
  4. Morabito, Alessandro; de Oliveira e Silva, Guilherme; Hendrick, Patrick (2019-10-07). "Deriaz pump-turbine for pumped hydro energy storage and micro applications". Journal of Energy Storage. 24: 100788. doi:10.1016/j.est.2019.100788.
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