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SPOTLIGHT ON IRELAND


DEVELOPING POWER TAKE OFF FOR WAVE ENERGY CONVERTORS


Blue Power Energy is an Irish based ocean energy technology development company founded in 2008 who are in the business of developing and commercialising a novel Power Take Off for wave energy convertors.


was funded by the Wave Energy Scotland PTO stage 2 programme where a contract of £306,530 was awarded to further develop and optimise the PTO. As part of this project the company built and tested a 5kW PTO with a control system to maximise efficiency. A kinematics model was developed for load prediction under various conditions.


IT CAN TAKE THE HIGH


FORCE AND LOW SPEED INPUT AND CONVERT IT INTO HIGH RPM OUTPUT


STAGE 3 PROJECT


Image – BPE PTO7 having characterisation/endurance testing at ETC, Glasgow


Blue Power’s Power Take Off (PTO) is an innovative direct drive PTO that uses a ball screw to convert linear motion as the prime mover into a rotary motion, suitable for operating conventional generators or water pumps. It is compatible with attenuator, point absorber and oscillating wave surge convertors.


HIGHLY RELIABLE TECHNOLOGY


Ball screw technology is well developed and utilised within the industrial and aerospace sectors, so Blue Power have


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transferred this highly reliable technology across to the wave industry. The PTO uses off the shelf components with few special parts. It is suited to wave harnessing because it can take the high force and low speed input and convert it into high RPM output without the requirement for a gearbox resulting in losses.


PROTOTYPES


Blue Power have built 7 prototypes to date that have been tested at various sites. The most recent prototype (PTO7),


www.wavetidalenergynetwork.co.uk


Blue Power Energy are currently making an application to progress to Wave Energy Scotland’s stage 3 project which will be a 2 year programme and advance our technology to TRL 5-6. The purpose of this project will be threefold…


1. To carry out additional exploratory and endurance bench testing on the main sub component (ballscrew) that was identified as been required during the WES stage 2 project work


2. To integrate our PTO and control system into a reputable WEC and both tank and sea test at appropriate scales


3. To build a commercial scale PTO and both marinise it and fit a torque limiter and bench test it


Blue Power Energy


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