Square Rigger - Sail Powered Energy

 Square Rigger Product Introduction and Specification Datasheet Version 8 – 24th June 2013 Square Rigger Version: 24 June 2013 Introduction The Square Rigger is an innovative design of small vertical axis wind turbine (VAWT) that combines cutting edge electronic control, with well understood and proven sailing technology Three rectangular sails, spaced at 120 degree intervals, rotate around a central vertical mast. Each sail also rotates at half speed about its own axis. Envisage the turbine from a birds‐eye view, rotating clockwise, as though upon a clock face. With the wind blowing from the 6 o’clock position, a downwind moving sail at 9 o’clock is fully perpendicular to the flow. An upwind moving sail at 3 o’clock is parallel, offering the minimal cross‐
section to the oncoming breeze. Energy is captured for approximately 270 degrees of cycle; downwind drag and upwind lift before and after the 3 o’clock position. This is analogous to the sailing capabilities of a yacht around a similar range of wind interface angles. The Square Rigger maximises the range of wind speeds in which it can generate power by varying the size of the sails; in low wind speeds the sails are fully unfurled, but as wind speed increases so the width of each sail is reduced. This, coupled with intelligent dynamic digital load control, optimises the energy produced by the turbine. ©Tradewind Turbines Ltd. 2013 Page 2 of 7 Square Rigger Version: 24 June 2013 Facts and Figures The Square Rigger can be configured to generate electrical power or pump fluids such as water or slurries. When configured for electrical power, there are numerous on or off‐grid storage and distribution options, please consult with Tradewind to determine the best solution for your specific requirements. The situation is similar when the unit is configured for fluid pumping. Site layout, fluid consistency, input and output locations, and pipework infrastructure requirements, all need to be correctly planned and calculated. Turbine Overview: Model name Architecture Installation options Square Rigger Vertically mounted sails, rotating about mast and own axis Permanent, semi‐permanent, and temporary mast options available Individual sail dimensions 3m tall x 2m wide Number of sails per set 3 sails, mounted at 120 deg. geometry Minimum effective sail area 3 x 3m x 0.2m = 1.8m2, furled Maximum effective sail area 3 x 3m x 2m = 18m2, unfurled Maximum sail area reduction 90% *Power yield 7,000 watts at 16 m/s 500 watts at 5 m/s *Annual energy yield Up to 7,000 kWh at 5m/s avg. wind‐speed site *Fluid pumping output (water) 15m3/h at 8m/s over a head of 4m Design life 20 years. Annual maintenance schedule recommended Warranty 2 years. Extensions available with maintenance packages CO2 reduction 7,500 Kg of CO2 per annum, comparison to diesel produced electricity *All performance data from field test programme. Dimensions: Overall height Height of turbine head Width of turbine head Footprint Swept area Weight of turbine head 10.7m including 6m mast base (subject to mast option) 5.5m 6.5m, maximum distance with correct sail orientation 12m diameter, including mast stays and mast base 17.1m2 vertical plane projection 800 kg, including transmission ©Tradewind Turbines Ltd. 2013 Page 3 of 7 Square Rigger Version: 24 June 2013 Performance, Systems and Control: Cut in wind speed Cut out wind speed Survival wind speed 3 m/s 20 m/s Designed to 50 m/s to include a safety margin of 20% 1 x 7 kW Multiphase Synchronous Permanent Magnet. Primary ratio: 12:1. Secondary ratio subject to output configuration. Gear and chain drives. 7 kW, dependent upon specific electrical integration requirements Proprietary software: “Turbine Control v2.4”, operating on RS485 Bus System Control Mechanical drive via PTO; Mechanical fluid pumping; electrical generation; grid tie; islanded integration; battery storage Sieb & Meyer Aeocon 4000/5000 Feed‐in‐
converter (standard system, options available) RS‐485 for optional additional local monitoring. Remote monitoring and control available. Complete hosted management system options. Multi‐feature digital toolset output for remote control of backup devices and other generation sources. Enables prolonged power control during zero wind conditions Generator Transmission drive ratio Maximum output Control system Output options Electrical power control System telemetry Auxiliary interconnect Safety and Function: Emergency braking system Yaw control Noise Lightning protection Maximum turbine head speed Operating temperatures Minimum height of rotating components Over‐speed control Fail safe systems ©Tradewind Turbines Ltd. 2013 Electronic fail safe control and digital load management. Autonomous shut down procedure. Includes ballast resistor and emergency stop Digital yaw damping Minimal acoustic profile Spike and earth rod to BS EN 62365:2006 15 rpm Tested ‐10 to +40 degrees C. 5 metres Autonomous shut down procedure Auto furling and wind drive de‐coupling Page 4 of 7 Square Rigger Version: 24 June 2013 Power Curve: 8000
7000
Power (W)
6000
5000
4000
3000
2000
1000
0
0
5
10
15
20
Wind Speed (m/s)
Annual Energy: 26
24
22
20
1000 kWh pa
18
16
14
12
10
8
6
4
2
0
3
4
5
6
7
8
9
Average Annual Wind Speed (m/s)
©Tradewind Turbines Ltd. 2013 Page 5 of 7 Square Rigger Version: 24 June 2013 ©Tradewind Turbines Ltd. 2013 Page 6 of 7 Square Rigger Version: 24 June 2013 Square Rigger Images and Renderings: ©Tradewind Turbines Ltd. 2013 Page 7 of 7 Square Rigger Version: 24 June 2013 ©Tradewind Turbines Ltd. 2013 Page 8 of 7 Tradewind Renewable Energy 1 Westwood Units Grace Road South Marsh Barton Trading Estate Exeter, Devon, EX2 8QE, UK Tel: +44(0) 1392 427 247 Fax: +44(0) 1392 420 351 www.tradewindrenewableenergy.com