Rooftop Wind Turbine

Greg PawlusBiem Andrew Thon

Matthew MacCormackBryan MacDonald

Rooftop Wind Turbine

•Wind Turbine Type and Shape•Aerofoil Design•Electrical System•Roof Bracket Design•Final Results

Wind Turbine Type

•Wind conditions: Low / Turbulent

•Darreius is efficient in turbulent winds

•Savonius is self starting

•Chose a combination Darreius/Savonius wind turbine

Aerofoil Design

Electrical System

•Net Metering•Indirect Grid Connection•Grid Connection System•Typical Appliance Power Usage

Net Metering

•Program in place to allow residents to produce and sell power to the grid.

•Allows residents to meet partial energy needs from renewable sources while still being able to draw from power grid.

Net Metering

Requirements:•Bidirectional Meter•Normal Voltage Condition: 110/220 – 125/250•Extreme Voltage Condition: 106/212 – 127/254•Total Harmonic Distortion: 5%•Frequency: 59.7 Hz – 60.2Hz•Grid disconnect during power outage

Indirect Grid Connection•Generator cannot be connected to the power grid directly•Three-phase rectifier produces a DC voltage•Voltage regulator outputs constant voltage•Inverter produces single phase AC signal with constant frequency

Grid Connection System

•Generator•Rectifier / Brake Switch•Inverter / Controller

Generator

Choose a PMG rated at 1000 watts at 350 RPM

Rectifier/Brake Switch

WindyGirl Voltage Limiting Rectifier:•Shorts the generator above 400 volts to electrically brake the turbine.•Provides a manual brake switch

Controller/Inverter

•Monitors the generators output to ensure the required standards are met.

•Monitors grid for power outages.

•SMA WindyBoy 1700