Analysis and Comparison of Test Results from the Small Wind Research Turbine
Download
1 / 30

Dave Corbus, Dan Prascher Presentation at the 24 th ASME Wind Energy Symposium - PowerPoint PPT Presentation


  • 91 Views
  • Uploaded on
  • Presentation posted in: General

Analysis and Comparison of Test Results from the Small Wind Research Turbine (SWRT) Test Project. Dave Corbus, Dan Prascher Presentation at the 24 th ASME Wind Energy Symposium January 10-13, 2005. SWRT Test Background. SWRT Test

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha

Download Presentation

Dave Corbus, Dan Prascher Presentation at the 24 th ASME Wind Energy Symposium

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Dave corbus dan prascher presentation at the 24 th asme wind energy symposium

Analysis and Comparison of Test Results from the Small Wind Research Turbine (SWRT) Test Project

Dave Corbus, Dan Prascher

Presentation at the 24th ASME Wind Energy Symposium

January 10-13, 2005


Swrt test background
SWRT Test Background Research Turbine

  • SWRT Test

    • Supply data for model validation of small furling wind turbines

    • Increase understanding of furling and small wind turbine dynamics

    • Further state-of-the-art test procedures for small wind turbines


Swrt testing and model development
SWRT Testing and Model Development Research Turbine

  • SWRT Test

    • Three different turbine configurations tested

    • Most comprehensive small turbine test

  • Upgrade FAST model to include furling

    • Perform model comparisons between SWRT FAST and ADAMS models and FAST and SWRT

  • Models often break down more for small turbine conditions

    • In and out of stall more

    • More yawed flow conditions

    • Dynamically active turbine


Swrt test description
SWRT Test Description Research Turbine

Yaw slip rings and encoder

Flap and edge blade strain gages

Furl Sensor

Rotor slip ring, encoder, and amplifiers

Sonic anemometer junction box

Shaft sensor

Tower leg load cell “washers”



Shaft sensor
Shaft Sensor measurements

  • Measures Shaft 0/90 bending, torque, thrust on fixed frame

  • 4 by 4 cross-talk matrix

  • Critical path load is the shaft bending from gyroscopic loads

    • During high yaw rate events and high rpm


Pre testing turbine characterization
Pre-testing Turbine Characterization measurements

Data for modeling included:

  • Tail assembly and main frame:

    • Weight, Cg, bi-filar, moment of inertia about yaw axis

  • Magnet can Cg and moment of inertia

  • Tail damper properties

  • Exact turbine geometries

  • Blade modal test


Data analysis edge correction
Data Analysis – Edge Correction measurements

3 edge summation in-plane did not equal torque

  • About 3-5x higher due to centrifugal loading!

    • But slow rolls validate calibrations

  • Moment arm created

    • Blade Cg minus centerline of rotation

    • Difference in edge gage neutral axis and blade Cg









Furl vs thrust
Furl vs. Thrust measurements




Swrt test configurations
SWRT Test Configurations measurements

All configurations tested with inverter load

Total of 514 10-minute records

A few resistor load files taken for each configuration

Some scatter in rpm-torque curve from inverter controller hysteresis

SWRT Configuration









Furling and inflow
Furling and Inflow configurations

  • Use sonic anemometer and meteorological data

  • Correlate inflow parameters and furling

  • Shows significance of vertical wind component and coherent turbulent kinetic energy




Swrt summary
SWRT Summary wind speed and different furl

  • Most comprehensive small turbine test data set

  • Better understanding of small wind turbine dynamic behavior, including thrust and furling

  • SWRT test data and modeling effort will help make furling design efforts for small wind turbines easier, but furling remains a challenge!

  • Better test procedures for small turbine testing

  • Inflow analysis shows effects of turbulence

  • Data will be available on NREL Website and final technical report available soon

  • SWRT FAST modeling results presented tomorrow morning


ad
  • Login