Meteorological towers typically are at least 50 m ft lattice or monopole towers supported by guy wires. The ideal approach is to collect one set of measurements at hub height, one at the lowest point the tip of the blade reaches, and another at the highest point that the tip reaches.
Class 3 is marginal, and class 5 is excellent. The level of detail of your study, however, will depend on the size of your intended project. Wind resource assessment production using a wind turbine manufacturer's power curve: Wind speeds can vary considerably across a wind farm site if the terrain is complex hilly or there are changes in roughness the height of vegetation or buildings.
The measurement program that you undertake should carry a cost that Wind resource assessment consistent with both the scale of your proposed project investment and with the uncertainty of the resource in your area.
Your banker will want a realistic assessment of the energy production and revenues of your project during a poor wind year in order to be sure that you will be able to cover any loan payment that you have.
Quantifying this annual variation will give your banker and investors valuable information about how much risk is associated with low production years and how your business plan will deal with these fluctuations in cash flow. To calculate the net energy production of a wind farm, the following loss factors are applied to the gross energy production: If the numbers are not looking good at this point, the project site should be reconsidered or the project must be structured differently.
This phase is very important because it will either justify spending substantial up-front funds to develop the site or show you that your money would be better spent on another site or investment.
You can use the projected cost of your project, the cost of financing that your institution is willing to offer you, as well as the required returns from investors and other assumptions to determine the price of energy you need to negotiate to ensure a positive project cash flow.
See the Bankable Wind Resource section of this Toolbox for detailed information about typical wind resource data results. Least squares linear regressions are usually used, although several other methods exist as well.
We will provide a wind map of your location, information from the nearest Sbalp meteorological tower, and a document describing how to interpret your map.
Initial assessment of the site is fairly simple in most states with publicly available high resolution wind resource data. Since onsite measurements are usually only available for a short period, data is also collected from nearby long-term reference stations usually at airports.
Keep this initial cash flow model and continually refine your assumptions as you move through detailed wind resource assessment and other steps of the development process so that you can begin to make apples to apples comparisons on how different decisions will affect project economics.
Long-Term Validation of Data This stage compares data at the site to long term weather data over the course of ten years or more. An acceptable wind resource for a project is very site specific.
Accurate wind energy resource assessment is a critical factor in the developing successful wind projects. Join the wind industry's leading owners, project developers, wind assessors, and siting professionals in Austin, Texas for the annual AWEA Wind Resource & Project Energy Assessment.
This. NRELÕs wind energy research focuses on wind resource assessment. Wind resource assessment is an expansive field, with entire companies based solely on wind measurement.
Large wind projects usually collect wind speed and direction data for multiple years using multiple measurement devices. Wind resource assessment is the primary factor considered when determining a wind farm site.
Accurate wind resource assessment allows wind farm developers to select sites that will supply maximum power output. Wind resource assessment is the primary factor considered when determining a wind farm site.
Accurate wind resource assessment allows wind farm developers to select sites that will supply maximum power output. The developer also gains insight into the types of turbine that should be deployed based.
A crucial factor in the development, siting, and operation of a wind farm is the ability to assess and characterize available wind resources. The Wind Program supports efforts to accurately define, measure, and forecast the nation's land-based and offshore wind resources.Wind resource assessment