renewable energy deployment technology developed in okinawa

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OKINAWA ENETECH CO., INC.Sadao Asato

June 18, 2015

Renewable Energy Deployment TechnologyDeveloped in Okinawa

OKINAWA ENETECH CO., INC.１. Summary of Okinawa Prefecture

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Okinawa

Data on Okinawa Prefecture

Area 2,300 sq. km

Population 1,416,000

Avg. temperature 23℃

Annual number of typhoons

(1951 – 2013 avg.)7.4

Average solar radiation time

1,710 hours

Average annual rainfall 2,040 mm

OKINAWA ENETECH CO., INC.

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2. Technology developed in Okinawa

RE Output control

Battery

Load control

OKINAWA ENETECH CO., INC.

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●Hateruma Island Project

System Stabilizer(Fly-wheel)

Wind Turbines(Capacity: 245kW×2)

Small-scale Power System

50％

50％

Variation Control

Electric Power LoadApprox. 700kW (Max)

Variation control by the demandDiesel Generator

(Total Capacity: 950kW)

【Laboratory Test】

Seawater DesalinationPlantＰ

【Verification Study】

Wind turbine tiltable system Flywheel

OKINAWA ENETECH CO., INC.

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RO Membrane

Seawater Tank

High-Pressure Pump

Seawater Desalination Plant DG Output Lower Limit Measures

●Hateruma Island Project

OKINAWA ENETECH CO., INC.

Tonga

Ghana

Laos

Thailand Cambodia

New Caledonia

Mongolia

Botswana

Hawaii

Kiribati

SolomonIslands

3. Overseas Projects

Russia

Samoa

Jamaica

Maldives

SeychellesCook Islands

Indonesia

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PalauMarshallIslands

Vanuatu

Fiji

OKINAWA ENETECH CO., INC.

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●System Interconnection Demonstration Project of Photovoltaic Power Generation in Thailand

OKINAWA ENETECH CO., INC.

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●Project in Thailand ① Project Overview

Power Conditioner

Solar Panel

Main Photovoltaic Generation System Load

Existing Diesel Generator

Storage Battery

Interconnection

• Photovoltaic generation outputcharge and discharge

• Photovoltaic generation outputstabilization

OKINAWA ENETECH CO., INC.●Project in Thailand② Interaction with Local People

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OKINAWA ENETECH CO., INC.

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Project structureIntegration of Okinawa and Hawaii's knowledge and experience to Pacific regions

ENETECH

Okinawa Hawai’i

Marshall Islands

Planning of PV Hybrid system

Legal system related to

renewables

Maximum allowable amount of renewables

Optimizing operation of existing

diesel gen. sets

OKINAWA ENETECH CO., INC.

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For a sustainable world…

We would like to deepen technical exchanges with various people around the world to further improve technical capabilities, which makes for a sustainable future.

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Thank you very much!

OKINAWA ENETECH CO., INC.