Post on 01-Feb-2017
HES-SO Valais-Wallis Page 1 Sierre, September 22nd, 2016
Open-air laboratory for a new isokinetic turbine prototype
Vlad Hasmatuchi Haute Ecole d’Ingénierie
Institut Systèmes industriels Groupe Hydroélectricité
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Objectives of this “pilot & demonstrator” project
Design and construction of a first prototype of isokinetic turbine for artificial channels with a power of 1 kW
Evaluation of its hydraulic performances in the tailrace canal of the Lavey run-of-river powerplant (Rhône river)
Validation of the numerical simulation results
Preparation of an industrialization phase to exploit this energetic potential in Switzerland and abroad
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Motivation
Estimation of artificial waterways energetic potential
Hydroelectricity statistics Isokinetic energy potential of tailrace canals
Type of powerplant Installed power [MW]
Annual production [GWh]
Installed power [kW]
Annual production [MWh]
Lave
y
Run-of-river 90 400 25 140
Suis
se Run-of-river 3854 17’022 1’070 5’957
Storage 8'081 17’297 2’244 6’053
Pumped-storage 1'383 1’594 0 0
Total 13’318 35’908 3’314 12’010
Estimation of Swiss small-hydro
potential: 1.3 TWh
1% of small-hydro potential
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Available isokinetic technologies
Power coefficient:
Betz limit:
Tip speed ratio:
2 31
12ρπ
=P
e o
PCR C
16 59.2%27PC = =
o
RCωλ =
*Khan et al. 2009
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Services industriels de Lausanne
Access to the pilot site
Stahleinbau GmbH
Fondation The Ark
Financial support
Construction of a 1kW isokinetic turbine and evaluation of its hydraulic performances into the tailrace canal of the Lavey power plant
HES SO Valais // Hydroelectricity Group Project management, Design, Manufacturing & Performance measurements
OFEN P&D
Financial support
Project management
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Pilot site
Tailrace canal of the Lavey run-of-river power plant (Rhône River)
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Pilot site
Free-surface flow numerical simulations have been performed to investigate its isokinetic potential
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Pilot site – hydrokinetic potential
Numerical simulations validated with in situ velocity measurements on three cross sections
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Pilot site – hydrokinetic potential
Nominal mean flow velocity : 1.4 m/s
Potential of mean flow velocity: 0.5 ÷ 1.7 m/s
𝑘𝑘𝑡𝑡 =𝑇𝑇(𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑)3 ∙ 365 100 %
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Hydraulic profile of a 1 kW turbine optimized with steady incompressible monophasic turbulent flow numerical simulations
5 stator blades and 3 runner blades
Mesh: Ansys ICEM CFD commercial software
Hydraulic profile design and optimisation
Component Domain Mesh type Number of nodes
Box Stationary Structured 1’630’098 Duct in Stationary Structured 1’342’488 Stator Stationary Structured 1’609’160 Turbine runner Rotating Structured 2’375’304 Duct out Stationary Structured 1’211’783
Full domain Structured 8’168’833
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Numerical simulation: Ansys CFX 16.2 commercial software
Numerical setup:
Hydraulic profile design and optimisation
Numerical method Finite volume Numerical scheme 2nd order Simulation type Steady Turbulence model SST
Fluid method Monophasic
Interfaces Direct connection method
Rotor-stator interaction Stage
Convergence criteria RMSmax < 10-4 Simulation duration >1’000 iterations
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Convergent-divergent duct to exceed the Betz limit
The variable speed should ensure an optimal operation under different inflow conditions
Power coefficient:
Tip speed ratio:
Hydraulic profile design and optimisation
𝐶𝐶𝑃𝑃 =𝜔𝜔 ∙ 𝑇𝑇
12 ∙ 𝜌𝜌 ∙ 𝜋𝜋 ∙
𝐷𝐷𝑒𝑒24 ∙ 𝐶𝐶𝑟𝑟𝑒𝑒𝑟𝑟3
−
𝜆𝜆 =𝜔𝜔 ∙ 𝐷𝐷𝑒𝑒2𝐶𝐶𝑟𝑟𝑒𝑒𝑟𝑟
−
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Sealed bulb housing including the variable speed generator, the encoder, the speed multiplier and the mechanical coupling
1kW compact permanent magnet synchronous generator
Coaxial gear speed multiplier with a factor of 1:16
Mechanical shaft sealing: resistant to suspended sediment conditions
Electro-mechanical concept
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Open-air testing platform
Dedicated to hydraulic performance measurements on the isokinetic turbine prototype
Allows the immersion of the prototype at the desired water depth
Give an easy and secured access to the machine for handling, instrumentation and control
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Open-air testing platform - characteristics
≈ 1.7 t
≈ 3.6 t
≈ 3.9 t
≈ 1.0 t
Total : ≈ 11 t
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Open-air testing platform - anchoring
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Open-air testing platform - installation
1. Base positioning
2. Pillars assembly
3. Base immersion
4. Platform installation 5. Turbine installation 6. Lifting system installation
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Instrumentation
Mechanical power measurements Indirect torque measurement method (from the electrical generator Itrms values ) Incremental encoder (Heidenhein ECN 1325)
Hydraulic power measurements Reference flow velocity measurements
TeleDyne ADCP (Acoustic Doppler Current Profiler) system
Operating conditions measurements Water temperature, water depth, etc.
Local flow condition measurements Flow velocity measurements inside the machine (custom-made miniature Prandtl probe)
𝑃𝑃ℎ =12∙ 𝜌𝜌 ∙ 𝜋𝜋 ∙
𝐷𝐷𝑒𝑒2
4 ∙ 𝐶𝐶𝑟𝑟𝑒𝑒𝑟𝑟3 𝑊𝑊
𝑃𝑃 = 𝜔𝜔 ∙ 𝑇𝑇 𝑊𝑊
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Instrumentation
Platform: Acquisition/control system River boat equipped with an ADCP system Electrical multimeter
Onboard instrumentation: Incremental encoder Moisture sensor Temperature sensors Water level sensor 3-axis inclinometer Miniature Prandtl probe
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Perspectives
Experimental validation of the 1st prototype - Proof of concept - Feed-back for optimisation
Development of a serial industrial version - Tests of endurance - Water-to-wire solution - Island or network connected electrical solution
Large scale industrial deployment - Artificial waterways - Energy production - Supply of deployed instrumentation in isolated area
2016 – 2017 2017 – 2019 2020 – …
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Vlad Hasmatuchi – Open-air laboratory for a new isokinetic turbine prototype
Acknowledgements
Partners of the Hydro VS – WP4 project:
Development team:
Project manager : C. Münch Hydraulic development : V. Hasmatuchi, A.Gaspoz, C. Münch Mechanical development : A.Gaspoz, J. Amacker, L. Rapillard with the support of N. Brunner (Stahleinbau GmbH) Electrical development : S. Richard, S. Chevailler