Scotrenewables award contract for manufacture of 250kw Tidal Turbine (SRTT) prototype.
Harland and Wolff Heavy Industries Limited have been awarded the contract to build the latest cutting edge prototype tidal turbine by Orkney based Scotrenewables.
The 30m long 250kw device is approximately a 1/4 scale power take off model of the full size device. The prototype will be manufactured in Belfast before being deployed at the European Marine Energy Centre (EMEC) test facility in the Orkneys.
Harland and Wolff Engineering Manager Fred Black said, ‘Harland and Wolff have been very active in the renewables market for many years now and Scotrenewables tidal turbine belongs to a small group of developers who have concentrated not just on the conversion technology, but importantly on making the device easy to install and maintain. Our input was to assist their engineers develop the design to make it production friendly. This makes it cheaper to manufacture and enhances quality.’
Scotrenewables’ Managing Director Barry Johnson said, ‘We’re delighted to continue working with Harland and Wolff on this important development. The Scotrenewables Tidal Turbine is a major step forward in marine renewables and this large scale model is a massive step toward proving the productivity, reliability and importantly the ease of operation and maintenance that is inherent in our design.’
He continued, ‘Each full-size SRTT will be circa 43.7m long with a draught to the rotor axis of 11m in operation mode. The rotors will be 12m diameter for the 1.0MW prototype device. The SRTT concept is designed for deployment in any water depths of >25m and mean spring tidal velocities of 2.5m/s to over 5m/s which covers 70% (Carbon Trust, 2006) of the UK tidal resource. In the transport mode the maximum depth of the SRTT is limited to 4.5m to allow access into most harbours for maintenance.’
Harland and Wolff Manufacturing Manager Trevor McCormick commented, ‘We’re delighted to be involved in this project. We have a strong track record in the marine renewables sector and understand the importance of this prototype and the trust that Scotrenewables are placing in us. We look forward to working with them and seeing the prototype prove itself.’
Some key benefits of the technical features include:
• Floating design – enables turbines to be in region of typically highest tidal velocity
• Compliant Mooring System - enabling deployment in deep waters
• Passive Yaw System – improve energy conversion, simplify design
• Fixed Pitch Rotor Blades – to reduce design complexity and cost
• High performance, low mass
• Rapid connection/disconnection
• Maintenance carried out inshore/in harbour
Figure 1 – SRTT Operation Mode
Figure 2 – SRTT Transport/Survivability Mode
Harland and Wolff Heavy Industries Limited
Tel +44(0)2890 534389
Tel: +44 (0)1856 851641