Estimating the Optimal Location of a New Wind Farm based on Geospatial Information System Data Dec.6 2007 Chungwook Sim.

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Presentation transcript:

Estimating the Optimal Location of a New Wind Farm based on Geospatial Information System Data Dec Chungwook Sim

How does a Wind Turbine Works? Generating the Power - Inside the wind turbine (retrieved from - Blades - Low-speed shaft, Gear box, High-speed shaft - Generator

- Numerical Weather Prediction model “meso-scale”, “micro-scale” - Wind Shear Profile “atmospheric stability”, “roughness” - Wind Speed at Hub height - Annual Power prediction General Sketch of the Project

- Understand the stability influential factors of a wind shear profile “Richardson Number”, “Monin-Obukhov Length” - Use GIS to integrate various layers “Multi-dimensional tools”, “Spatial-analyst tools” Objective of the Project

- Navier-Stokes and Continuity Equation of the atmosphere Physical Concepts of Boundary-Layer Flow - Reynolds- Averaged Equations and the Turbulent Momentum Flux - Wind Speed

- Mixing Length, Friction velocity, roughness length Logarithmic Wind Shear Profile

- Richardson Number and Monin-Obukhov Length Thermal Stratification on the Wind Shear Profile Potential Temperature Richardson Number - Monin-Obukhov Length *** CORRECTION of the Logarithmic Profile

a) Choose various locations with different terrain conditions in Texas. >> >> b) Investigate and collect data of the topography and other stability conditions that can affect the wind power production. c) Collect climate data of wind speed from NOAA online. >> d) Collect the data of demography or energy consumption to determine the energy demand of each location. >> Data Collection Data Catalog of National Centers for Enviornmental Prediction (NCEP) NARR (North American Regional Reanalysis) dataset >> - The operational model: Eta model - Resolution: 32 km grid - Data available: 1979 to current - Directories: 3 hourly climatologies, daily, monthly Format of the data (NetCDF)

Data Verification- Comparison with TCOON Measurements

NARR v.s. TCOON Measurements

Spreadsheet of Wind Shear Profile Correction

Wind Power of US

Conditions at the Great Plain- Richardson Number

Conclusions and Future Work - GIS is useful in integrating a great number of variables “Map Algebra” with scripts! - NARR data catalog is useful in estimating climate related topics “verification required near surface” - Annual Power prediction v.s. Demand of Power? “accuracy in wind speed at hub-height”

Questions?