Renewable Energy (LSE:REH)
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RNS Number : 4505T
Renewable Energy Holdings plc
06 December 2011
6 December 2011
Renewable Energy Holdings plc
("REH" or the "Company")
Re: Carnegie Demonstration Project Preliminary Design Complete
Renewable Energy Holdings plc (AIM: REH), the AIM quoted investor in, and operator of, European wind power, notes an announcement released on 6 December 2011 by Carnegie Wave Energy Limited, in which REH holds 232,600,000 fully paid ordinary shares, representing 25.8% of the entire issued share capital.
"6th December 2011
Demonstration Project Preliminary Design Complete
-- Preliminary design for grid-connected project complete
-- Optimum size is approximately 2MW peak capacity
-- Significantly increased CETO unit power
-- Unit installation down from 7 days to 24 hours
Wave energy developer Carnegie Wave Energy Limited (ASX: CWE) is pleased to announce the completion of the preliminary design for the first CETO grid-connected project.
Following the successful in-ocean trial of the CETO 3 commercial scale unit earlier this year, Carnegie's technical team has analysed a huge quantity of data allowing further validation and development of the CETO design utilising Carnegie's virtual modelling capabilities. This analysis and design work has focused on the full CETO system including the CETO unit design and foundations, pipeline and onshore power generation facility.
It concludes that the first grid-connected CETO demonstration project should be between 1 and 5MW peak capacity with an optimum of approximately 2MW peak.
Carnegie's CEO and Managing Director, Dr Michael Ottaviano said,
"The completion of the preliminary design for the 2MW grid-connected project represents a major step forward in CETO's technology maturity. The next phase of the process is for Carnegie to confirm a final location for this demonstration project. This will be Carnegie's first power project and will deliver our first project-based revenues through the sale of the electricity generated."
Selection of the location of the project site will allow the completion of detailed project design ahead of project construction.
The CETO 3 analysis has provided the basis to optimise the Buoyant Actuator's hydrodynamic properties to increase power output through more efficient energy capture and conversion.
Through optimisation of the Buoyant Actuator geometry, the preliminary design offers a two-fold increase in power production from the CETO 3 unit, with only relatively minor modifications, thereby delivering a significant reduction in the cost of generation.
Power Generation Facility
The onshore power generation facility contains the hydro-electric equipment including the Pelton Wheel Turbine, electrical switchgear and the instrumentation and control system. The preliminary design ensures high availability through redundant systems, in particular the turbine and generator.
Significant effort has been put toward designing, modelling and simulating the control algorithm that regulates the pressures in the pipelines. The physical footprint of the onshore facility has also been minimised to allow flexibility in siting and to ensure minimal visual impact.
The design of the pile foundation has been largely focussed on the integration of a quick-connect system to allow CETO units to be installed and operational within a 24 hour window. This is in contrast to the 7 days required for the CETO 3 installation. The design incorporates both the structural and hydraulic connections using proven technology originating from offshore oil and gas applications. The new installation method, devised following learnings from the CETO 3 deployment, also tailors the diving and vessel requirements to those that are locally available in all prospective demonstration sites reducing installation cost and risk.
Pipeline to Shore
A small bore (200mm nominal diameter) pipeline carries the hydraulic energy back to shore from the CETO unit array and has been a focus of hydraulic modelling and optimisation work. Transient effects have been managed through careful sizing of surge vessels allowing a smaller pipeline than would have otherwise been possible. At the outlet of the turbine a similar pipeline returns the water-based working fluid back to the array for re-pressurisation. Optic fibre communications cables piggy-back the pipeline connecting the CETO unit instrumentation to the control system onshore.
Indicative pipeline routing
The CETO system distinguishes itself from other wave energy devices by operating out of sight and being anchored to the ocean floor. An array of fully submerged buoys is tethered to seabed pump units. The buoys move in harmony with the motion of the passing waves, driving the pumps which in turn pressurise water that is delivered ashore via a pipeline.
On shore, high-pressure water is used to drive hydroelectric turbines, generating zero-emission electricity. The high-pressure water can also be used to supply a reverse osmosis desalination plant, replacing greenhouse gas emitting electrically driven pumps usually required for such plants.
CETO Technology characteristics include:
-- CETO converts ocean wave energy into zero-emission electricity and desalinated water
-- CETO is environmentally friendly, has no visual impact and attracts marine life
-- CETO is fully submerged in deep water away from breaking waves, beachgoers and where it is safe from storms
Carnegie Wave Energy Limited is an Australian, ASX-listed (CWE) wave energy technology developer. Carnegie is the 100% owner and developer of the CETO Wave Energy Technology intellectual property."
For further information, please contact:
Renewable Energy Holdings plc Tel: +44 (0) 16 2464
Mike Proffitt, Chief Executive 1199
Strand Hanson Limited Tel: +44 (0) 20 7409
Rory Murphy / James Spinney 3494
Novus Capital Markets Ltd Tel: +44 (0)20 7107
Nicholas Lee 1881
FTI Consulting Tel: +44 (0) 20 7831
Billy Clegg / Ed Westropp / Alex Beagley 3113
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