WaveSAX, an innovative wave energy generator

Transcription

1 Maximo Peviani LOW-LAND HYDROPOWER Delft, 20 September 2018

2 Contents Bases of the conceptual design Numerical analysis of the device with Wells turbine Stage 1-2: Concept validation with 1:20 model (TRL3) Stage 3: Design validation with 1:5 model (TRL4) Device control system validation (TRL 5) Pilot case at the Mediterranean sea Conclusions

3 New technologies PELAMIS, Attenuator OYSTER, Oscillating Wave Sure Converter LIMPET, Oscillating Water Column

4 Physical principle: ocean wave energy

5 WAVESAX bases of the conceptual design flexibility of the device to be installed in different structural configurations (existing or to be constructed ad hoc), in order to reduce as much as possible the costs of installation, maintenance and connection to the grid replicability that allows the device to be installed in several number of similar units, depending on the climatological and morphological conditions of the coast

6 WAVESAX Bi directional solution OWC with the turbine working in the liquid phase Innovative oscillating water column device Pressure (left) and velocity module(right) fields, simulated with CFX Wells turbines to be coupled with the device Agate, Amicarelli, Peviani (RdS 2013) 6

7 Analysis of the device with Wells turbine Simulation with variable discharge induced by the wave motion (H s = 2m and T=7,5 s) Agate, Amicarelli, Peviani, 2014 Lateral view View of the rotor 7

8 Analysis of the device with Wells turbine Simulation with variable discharge induced by the wave motion (H s = 2m and T=7,5 s) Pressure variation before and after the rotor (Pa) Power absorbed by the turbine (W) Agate, Amicarelli, Peviani, 2014 Velocity module (m/s) 8

9 Structured Development Plan for Wave Energy WAVESAX

10 STAGE 1 Concept validation (TRL3) Configuration 2 (WaveSAX) OCEAN WAVE BASIN at HMRC (Hydraulics and Marine Research Center) in Cork, Ireland (July 2014)

11 Ocean wave basin tests (1:20) P1 P1 P2 P2 P5 P3 P4 Peviani, Danelli, Thiebaut,

12 Ocean wave basin tests (1:20) Response Amplitude Operator (RAO) RAO

13 STAGE 2 Design validation (TRL 4) LHEEA Hydrodynamic and Ocean Engineering Tank (Sep 2015)

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15 Test 25 (H=0.4 m ; T= 3.13 s; Depth 0.6 m) Corresponding to H s =2m and T=7s in the prototype Angular velocity (rpm) Torque (Nm) Peviani, Danelli, Bourdier, 2015

16 Test 6 (H=0.3 m T=3.13s depth 0.04 m with damping) Corresponding to H s =1.5 m and T=7 s in the prototype Peviani, Danelli, Bourdier, 2015

17 STAGE 3 System validation (TRL 5) CNR INSEAN Laboratory Rome, Italy

18 STAGE 4 Systems validation (TRL 5) Water oscillation Battery power

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20 STAGE 4 Systems validation (TRL 6) Civitavecchia Port (Rome)

21 STAGE 4 Systems validation (TRL 6) Civitavecchia Port (Rome)

22 Estimated energy production Estimated nominal power of the turbine (each device) WAVESAX = KW Estimated energy production (each device) WAVESAX = 6 10 GWh/year 22

23 Altri siti italiani Civitavecchia : Et = 27 MWh/m/anno Alghero : Et = 103 MWh/m/anno Genova Oristano Civitavecchia Capo Granitola Mazara del Vallo : Et = 48 MWh/m/anno

24 CONCLUSIONS WaveSAX advantages the modular design, easy the replicability in a large numbers of units the flexible installation and adaptability to different coastal structures of the Mediterranean sea the possible wave amplification (RAO) for certain incident waves conditions the improvement in the available power for PTO, depending on the submergence and orientation of device respect to the incident waves the high energy absorption per meter of incident wave front, due to the direct on water energy conversion

25 CONCLUSIONS the limited installation cost, due to the possibility of mooring in existing structures, the reduced maintenance costs, because of its installation on the shoreline, the contained transmission costs, because of its vicinity to the consumption areas, it is not clear yet which is the best configuration for the Wells turbine (4, 5 or 6 blades), further research is needed. study mooring solutions and device security in case od storm, investigate the best way for the connection to the grid

26 Many thanks! ************** This work has been financed by the Research Fund for the Italian Electrical System under the Contract Agreement between RSE S.p.A. and the Ministry of Economic Development - General Directorate for Nuclear Energy, Renewable Energy and Energy Efficiency, stipulated on July 29, 2009, in compliance with the Decree of November 11, 2012.