M. Bassetti, A. Corsini, G. Delibra, F. Rispoli
Progetto e prima verifica operativadi una µ-turbina Wells per il Mar Mediterraneo
FMGroup @ DMA-SapienzaCRAS Sapienza
M. Ruggeri
This research has been carried out in the framework of the POSEIDONE consortium, under the auspices of MATTM
Workshop ENEA – Energia dal mare: Le nuove tecnologie per I mari italiani, Roma 1 luglio 2014
FMGroup @ DMA-Sapienza
Outline
Motivations and aims
Description of the POSEIDONE project
CFD based DIMA FP-TW turbine aerodynamic design
DIMA FP-TW turbine manufacturing
DIMA FP-TW test-rig & experimental validation campaignsDIMA FP-TW acoustic characterization
POSEIDONE Project
Motivations, why Ocean Energy in Mediterranean sea
FMGroup @ DMA-Sapienza
Corsini A., et al Space-Time Mapping Of Wave Energy
Conversion Potential In Mediterranean Sea States. ASME-ATI-
UIT 2010
POSEIDONE Project
State-of-the-art class of wave energy converters
State-of-the-art Wells turbine, mono-plane
• self-rectifying turbine
• narrow operating margin
• designed for ocean conditions
above 30 kW/m
POSEIDONE Project
State-of-the-art OWC chamber
• standard OWC chamber features small period of oscillationdifficult resonance in case of near-shore waves
• reduced structural resistenceowing to the geometrical configuration
• opening in OWC attenuates energyconversion from small period waves
FMGroup @ DMA-Sapienza
FMGroup @ DMA-Sapienza
New class of wave energy converters (i)
POSEIDONE Project
POSEIDONE project
This programme of research aims at the definition of a technology standard
for on-shore WEC suited for Mediterranean sea states and port breakwater
caisson integrationin a view to develop the first Italian full-scale prototype and a open-ocean test-rig @ NOEL Lab in Reggio Calabria
The proposed WEC defines a RES for µ-power generation (1 - 100 kWe)
The WEC is based on the combination
an innovative resonant caisson (U-OWC or REWEC3) designed by
P. Boccotti and industrialized by WavEnergy.it s.r.l. (pat. n.
1332519)
Wells turbine concept tailored to cope with low-energy wave conditions
Boccotti P., 2007. Part I: Theory. Ocean Engineering. vol. 34, pp. 806-819.
Boccotti P., Filianoti P, Fiamma V, Arena F. 2007. Part II: A small-scale field experiment. Ocean Engineering. vol. 34, pp. 820-841.
New class of wave energy converters (ii), turbine
Design challenges for Mediterraneanapplications
• optimization of torque @ low flow rate
• stall resistent turbine
• compact unit at high rotational speed
• extension of duty time
POSEIDONE Project
experiments
Setoguchi T. Santhakumar S. Takao M. Kim T.H. Kaneko K. 2003 “A modified
Wells turbine for wave energy conversion” Renewable Energy
FMGroup @ DMA-Sapienza
Efficiency
New class of wave energy converters (iii), turbine
POSEIDONE Project
Torque coefficient
3600 rpm
3000 rpm
Design challenges for Mediterraneanapplications
• optimization of torque @ low flow rate
• stall resistent turbine
• compact unit at high rotational speed
• extension of duty time
NACA0015
NACA0020
Design data requirements
Blade profile: NACA 0015Configuration: Monoplane
Outer diameter: 0.5 m
Rotational frequency: 3000 to 36000 rpm
Bulk velocity (design): 9.1 m/s
FMGroup @ DIMA-Sapienza
Target peak turbine power 2 kW
DIMA-FP TW1.5 turbine
Aerodynamic design process
Solidity checkCaisson hydrodynamic interface
Torque & power
Self-starting
Hub design
CFD-aided IGV-OGV design
DIMA-FP TW1.5 turbine
POSEIDONE Project
FMGroup @ DMA-Sapienza
Sensitivity to solidity
Blade solidity (σ) 0.64/0.5
Blade count (z) 3/4/7/8/9
Hub to tip ratio (÷) 0.75-0.5
DIMA-FP TW1.5 turbine
POSEIDONE Project
FMGroup @ DMA-Sapienza
Self-starting
shub c z L (m) T (N m) Paer(W) Pmecc (W) ηηηη
0.64 0.75 7 0.117
BEM simulation
5.20
BEM simulation
2215.00
BEM simulation
1960.00
BEM simulation
0.8
DIMA-FP TW1.5 turbine, CFD based design
POSEIDONE Project
Inflow velocity radial profileFMGroup @ DMA-Sapienza
DIMA-FP TW1.5 turbine
CFD based design of IGV-OGV
POSEIDONE Project
FMGroup @ DMA-Sapienza A. Corsini, OWEMES2012, Rome, Italy, Sept 2012
TKE
(Peak flow expiration phase)
Velocity isolines
(Peak flow expiration phase)
FMGroup @ DMA-Sapienza
DIMA-FP TW1.5 turbine
CFD based design of IGV-OGV performance
POSEIDONE Project
DIMAFP-TW1.5
CFD rotor only
DIMAFP-TW1.5design
DIMAFP-TW1.5field data
(NOEL Lab)
Q[m3/s]
1.0178 0.948
∆∆∆∆p [Pa] 2679 2578 2707
Cm[Nm]
4.48 5.07
P [W] 1408 1592 1401
FMGroup @ DMA-Sapienza
FMGroup @ DMA-Sapienza
DIMA-FP TW1.5 turbine
Proto-type manufacturing
Poseidone test rig @ Faggiolati Pumps
Aerodynamic measurements
Forced draft fan
inverter & chopper
FMGroup @ DMA-Sapienza
Aerodynamic characterization
Experiments vs design
Aerodynamic characterization
Experiments vs design
IGV Aerodynamic characterization
Experiments vs design
Acoustic mesaurments at the turbine exhaust in uni-directional operating mode
DIMA-FP 1.5 TW in rotor only configuration
Rotational frequency: n = 2000 rpm - 3000 rpm
Operating points: Q1 = 1000 m3/h, Q2 = 2000 m3/h, Q3 = 3000 m3/h, Q4 = 4000 m3/h (stall)
4 mic locations @ 5.32 m: A, B, C, D
Acoustic characterizationPOSEIDONE Project
FMGroup @ DMA-Sapienza
3000 rpm (25°) - SPL frequencyspectra low-pass filtered @ 300 Hz
POSEIDONE Project
FMGroup @ DMA-Sapienza
3000 rpm, Portata Q3 - SPL frequency spectra low-pass filtered@ 300 Hz
Rotational frequency:n = 3000 rpm
Flow rate:Q1 = 1000 m3/h, Q2 = 2000 m3/h, Q3 = 3000 m3/h, Q4 = 4000 m3/h (stall)
POSEIDONE Project
FMGroup @ DMA-Sapienza
Acoustic characterization
Directivity of noise emission
XFOILturbine design
BET AnalysisModule
Boundary Layer Module
Integral Quantities Analysis
BPM Aeroacustic Model
BPM noise prediction
• TBL-SE, trailing-edge noiseturbulent BL
• LBL-VS, vortex noise
• S-S, stall and separation noise
FMGroup @ DMA-Sapienza
Acoustic characterization
BPM
experiments
Q3
POSEIDONE Project
FMGroup @ DMA-Sapienza
Acoustic characterization
Experiments vs BPM model
POSEIDONE Project
FMGroup @ DMA-Sapienza
DIMA FP TW futures
DIMA-FP TW 25
Brevetto dep. controllo attivo del flusso e dell’inerzia, marzo 2014
Development of a wave energy converterfor Mediterraneanoperation
FMGroup @ DMA-SapienzaCRAS Sapienza
This research has been carried out in the framework of the POSEIDONE consortium, under the auspices of MATTM
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