Kestrel Small Wind Turbines in Schools

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1 Kestrel Small Wind Turbines in Schools Renewable energy in Education Eveready Diversified Products, Port Elizabeth, South Africa

2 Eveready-Kestrel (SA) Established in 1937 Manufacturing plant ISO-accredited Bought Kestrel technology in 2006 Have been supplying off-grid power for telecommunications since 2002 Eveready-Kestrel supplies high performance reliable energy that is low maintenance

3 Unique Micro-Wind Turbine Technology AXIAL FLUX TECHNOLOGY IN GENERATOR Better thermal management Lower heat losses Better output efficiency AEROFOIL BLADE SYSTEMS Low wind start-up Reduced noise emissions Better aerodynamics PITCH CONTROL SYSTEMS No over-speeding Reduced lateral thrust Maximised output in all wind regimes COMPLETE SYSTEM SOLUTIONS Eveready manufactures all elements of the Kestrel system

4 Manufacturing Quality Process P-PHASE Design brief Design phase Prototype testing T-PHASE Test batch produced Safety and function test Power and performance test Duration test Environmental test set-up (DAC O-PHASE First run of manufacturing line Certification completion Conformity Statement

5 Types of Systems Used in Education

6 On-grid System Appropriate for demonstrating energy production, renewable energy and electrical circuits

7 Off-grid System Supplies electricity where grid not present Appropriate for demonstrating energy production, renewable energy and electrical circuits

8 Off-grid System Sizing

9 e150 (600W) Turbine Diameter: 1,5m Rated output: 600W Output form: Two wire DC Generator type: Permanent-magnet Axial Flux Brushless Overspeed Protection:Rotor Turbulence Tower Top Mass: 40kg Rated wind speed: 13ms -1 Cut-in wind speed: 2,8ms -1 No cut-out wind speed and no furling wind speed Widely accepted as the quietest machine in the market TYPICAL APPLICATIONS Back-up system for home Back-up system for radio towers Alternate energy source for public lighting Alternate energy source for promotional displays Suitable as an educational tool

10 e300 i (1kW) Turbine Diameter: 3,0m Rated output: 1000W Output form: Two wire DC Overspeed Protection: Pitch Control Tower Top Mass: 75kg Rated wind speed: 11ms -1 Cut-in wind speed: 2,5ms -1 Generator type: No cut-out wind speed and no furling wind speed Permanent-magnet Axial Flux Brushless TYPICAL APPLICATIONS Reduce energy consumption in office buildings Solutions for commercial applications Powering telecommunications towers Rural community mini-grids

11 Practical Solutions 1. Educational Tool 2. Power Source

12 Educational Tool Purpose: Install renewable energy source to educate pupils as part of a programme on energy awareness Requirements: Educating learners about the potential of renewable energy Safety Kestrel s carry the European Certification (CE) for small wind turbines which requires stringent testing and failsafe design also independent structural approval required Unobtrusive and silent as is in a learning environment Installation Description: One Kestrel e150 wind turbine mounted on a top floor wall on the school building with a Kestrel charge controller, an AC to DC power inverter, a 12V fan, a LED clock, a 12V light and a divert resistor as well as a 50W spot light to light the installation

13 Power Source Purpose: Install renewable energy source to power computers at schools Requirement: Computers in continuous use per hour (kwh) per day (kwh) per week (kwh) per year (kwh) Potential: Potential Number of Computers by Region EL-area PE-area Inland EC e400 (3kW) e300 (1kW) Note - suitable battery-bank dependent on computer on/off pattern - Assume 5 hours a day, 40 weeks per year and on/off once a day

14 Installation

15 Some save whales We save energy