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THE DEVELOPMENT OF INDONESIAN VERTICAL AXISMARINE CURRENT TURBINE

FOR THE TIDAL POWER GENERATION

Erwandi

Indonesian Hydrodynamics Laboratory - Surabaya

Agency for the Assessment & Application of TechnologyTelp. 081-334-543-406

Email: erwandi@gmail.com

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Presentation Outline

Introduction The use of numerical ocean modeling to select

the candidate location for installation marinecurrent turbine

Detail of numerical simulation of candidatelocation

Survey the candidate location

Design of the marine current turbine rotor

Model manufacturing and testing in towing tank

Manufacturing the prototype

Conclusion

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Marine Current Energy Potential According to TopexPoseidon Sattellite

Source: Ray et.al. (2005): A BriefOverview of Tides in theIndonesia Seas

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The Importance of Tidal Current Mappingin Indonesia

Large quantities of tidal power input from adjoining Indian and

Pacific Oceans

The estimated tidal current in the Indonesian region was the

most poorly determined of any region in the world ocean

(Egbert and Ray 2001):

1. Complicated coastal geometries with narrow straits and myriad small

island

2. Rugged bottom topography

3. limited data constraints from relatively widely spaced satellite tracks.

Base on the reasons, MEC-Model is proposed to simulate thecurrent in several narrow straits in Indonesia

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Sample of Numerical Simulation ofLarantuka Strait

http://localhost/var/www/apps/conversion/tmp/scratch_6/vektor_zoom.rm

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Numerical Simulation Results

Average Power : 2 MW

http://localhost/var/www/apps/conversion/tmp/scratch_6/vektor_zoom.rmhttp://localhost/var/www/apps/conversion/tmp/scratch_6/power_zoom.rm

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urvey

Ebb tide

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Design of Marine Current Turbine Rotor Model

Darrieus Turbine type H

Diameter 1.0 m, span 1.0 m

3 blades

Solidity = nc/R = 0.6

Capacity 1.5 kW at currentspeed 2.0 m/s (eff = 25%)

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Foil Design

Base on literature, symmetry foil NACA 0018 and

high camber airfoil NACA 8718-73

CL and CD is predicted by panel method & CFD

NACA 0018 NACA 8718-73

Vector Distr. = -128 Vector Distr. = 150

Angle of attack = 0 - 359

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Model manufacturing :turbine blade and pivot

Pivot is set at 10% chord from leading edge

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Hydrodynamic Model Tests

V = 1.5 m/sV = 3.0 m/s

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2 kW Indonesian Marine Current Turbine Prototype

8 x 6 m pontoon

Desain PLTAL Ponton dan dek Sistem tambat Dek PLTALRangka Bangunan Atas

PMG 3.5 kW, 250rpm

Baterei MFInverter 2 kW 3

buah

Bilah turbin bahanaluminum

Bilah turbin bahanfibre PU

Radial arm

Bahan stainless

Diameter and blade 2 x 2 m

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2 kW Protype Testing at Larantuka Strait

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10 kW Prototype

Testing, LarantukaStrait March 2011

http://localhost/var/www/apps/conversion/tmp/scratch_6/Copy%20of%20MOV011.MPG

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Conclusion1. The numerical ocean modeling (MEC model) can

reproduce the nature of tide and tidal current in several

straits in Indonesia. It can be used to find out the most

suitable point for installation of marine current turbine in

those straits.

2. The foil of the rotor blade can be designed based on theflow characteristic simulated in the numerical ocean

modeling.

3. The marine current turbine rotor model and duct model

is designed, manufactured, and tested at IHL to improvethe performance of the turbine.

4. The test of 2 kW and 10 kW IHL marine current turbine

prove that the marine current designed by IHL can

generate electricity.