Alstom Supplier Requirements for OCEDG4-1ALLSUP0002EC ALSTOM SUPPLIER REQUIREMENTS FOR SCOTTISH SUPPLY CHAIN OPPORTUNITIES 3 2 1 authority, is strictly prohibited. Page 1 / 7
Alstom Supplier Requirements for OCEDG4-1ALLSUP0002EC 0 06/11/13 A Alliston T Sharpe T Sharpe Rev Date Author Checked Approved Modifications Status (*) (*) PRE : Preliminary, INF : For information, REV: For revision, GFE: Good for Execution authority, is strictly prohibited. Page 2 / 7
Alstom Supplier Requirements for OCEDG4-1ALLSUP0002EC Contents 1. ALSTOM OVERVIEW... 4 2. TURBINE OVERVIEW... 5 3. SUPPLIER REQUIREMENTS... 7 authority, is strictly prohibited. Page 3 / 7
1. ALSTOM OVERVIEW Alstom is a global leader in the world of power generation, power transmission and rail infrastructure and sets the benchmark for innovative and environmentally friendly technologies. Alstom builds the fastest train and the highest capacity automated metro in the world, provides turnkey integrated power plant solutions and associated services for a wide variety of energy sources, including hydro, nuclear, gas, coal and wind, and it offers a wide range of solutions for power transmission, with a focus on smart grids. The Group employs 93,000 people in around 100 countries. It had sales of over 20 billion and booked close to 24 billion in orders in 2012/13. Alstom understands that renewable energy sources are an essential element of global power strategies for the 21st century. While renewables cannot meet all of our electricity needs in this century, there is clear potential for dynamic growth from today s usage levels. Incorporating renewable energy not only supports the power industry s environmental goals, but also addresses national needs for energy security and independence. Alstom is committed to providing a flexible portfolio of reliable, competitive technologies to capture the energy of the earth, wind, water and sun. Alstom s technology development is focussed on improving availability, increasing the efficiency of energy conversion, and lowering construction and maintenance costs. Alstom s integration and control solutions offer you the ability to manage renewables within a complex fleet. In 2013, Alstom acquired the advanced tidal stream turbine technology originally developed by Tidal Generation Ltd, signalling their intention to be at the forefront of the tidal energy market. Alstom s 1 MWe demonstration tidal turbine has been tested in different operational conditions at the European Marine Energy Centre (EMEC) through the ReDAPT testing program (part of the Energy Technologies Institute (ETI) commissioned and co-funded Reliable Data Acquisition Platform for Tidal consortium project). It has shown a reliability and performance in line with its design models and generated over 100MWh onto the grid. The next step of the testing program will be to demonstrate the full range of autonomous running capabilities of the turbine (its ability to efficiently operate independently), continue with the planned maintenance and gather evidence for certification. The endurance and reliability will also be tested into 2014. Tests in pilot farms will follow prior to the start of full commercial production. Alstom is currently in a process to develop the supply chain to support the production of turbines and support structures for their first pilot farms. Alstom aims to develop long term relationships with capable, cost effective suppliers to support their commercialisation into volume manufacturing. This document is intended to help prospective suppliers to identify synergies and capabilities that might meet Alstom s requirements. authority, is strictly prohibited. Page 4 / 7
2. TURBINE OVERVIEW The Alstom tidal turbine is a non-surface piercing 3 bladed axial flow turbine with variable-pitch. The blades are connected to a hub, which drives the gearbox via a main shaft. The high-speed output shaft of the main gearbox drives an induction generator. A power converter provides full power control, and a transformer steps the turbine output voltage up to a level suitable for transmission. A clamp is used to attach the turbine to the support structure and the turbine is also able to yaw to face the oncoming tide, which is achieved by partially releasing the clamp and using an externally-mounted electric thruster. The turbine has other auxiliary systems that include water and oil cooling, hydraulics, water ballast, bilge system, and a brake. (Figure 1) The turbine is buoyant and this enables the turbine to be towed behind a small vessel from the O&M base to site during installation and retrieval. During installation the turbine is pulled down onto the seabed support structure using a rope and an externally mounted winch assembly. The winch assembly is detachable and is recovered as part of the installation process and re-attached to the turbine for retrieval. During retrieval the winch controls the buoyant ascentrate of the turbine. Once the turbine is winched down onto the support structure, the clamp is activated to securely attach the turbine to the top of the support structure. Once secure, a system aligns and stabs the wet-mate connectors on the turbine side to mating halves permanently mounted on the support structure to achieve electrical and fibre-optic connection to the shore. The stab incorporates a cable management system to permit rotation of the turbine at slack water, whilst remaining connected to the grid. The turbine is designed to operate in sites with 40 to 80 m water depth and typical flow speeds of up to 4 m/s. The turbine internal spaces are at standard atmospheric pressure. Components are either of a corrosion-resistant material, or more typically coated with a marine-specification epoxy paint system. The turbine nacelle has a diameter of around 3.5m, length around 20m and weight around 200 tonnes. authority, is strictly prohibited. Page 5 / 7
Figure 1- Alstom Tidal Turbine authority, is strictly prohibited. Page 6 / 7
3. SUPPLIER REQUIREMENTS Alstom are seeking suppliers with some or more of the following capabilities: 1. Design and manufacture of complex highly stressed composite structures with experience in carbon fibre, glass fibre and integration of steel components. Ideally with experience in the tidal sector, experience in the wind industry would be advantageous. 2. Structural casting in the region of 20 tonnes, up to 3m diameter and 100mm wall thickness, ideally the supplier will be able to offer machining services to provide a fully machined component. 3. Forging and machining for diameters up to 1m and 2m length. 4. Structural steel fabrication including rolling (up to 40mm wall thickness), welding, machining (up to 3.5m diameter structure and up to 9 m long), NDT, painting and potentially first-fit assembly services. 5. Structural steel fabrication and machining up to 15 tonnes. 6. Machining of steel components up to 3.5m diameter. 7. Offshore subsea structural steel fabrication, including rolling (up to 80 mm wall thickness), complex fullpenetration weld preparation and welding, heat treatment of key welds, NDT and x-ray inspection and painting. Ideally the supplier will have quayside facilities including laydown to enable load-out of structures up to 200 tonnes. 8. Suppliers with track record in supplying wind turbine pitch systems, gearboxes, generators, frequency converters, transformers and switchgear. Ideally the supplier will have existing volume production capabilities. 9. Suppliers with a track record of system integration for subsea environments covering one or more of the following areas; hydraulics, electrical actuation, mechanical actuation, impeller-based propulsion, control systems, umbilical management, subsea cable connectors and integration and ROV tooling. Ideally the supplier will be able to take on full-scope to provide a complete, tested sub-system. In some cases system design services may be required. 10. Suppliers to build-to-print Low Voltage and Extra Low Voltage electrical cabinets. Suppliers should also be capable of providing testing services. authority, is strictly prohibited. Page 7 / 7