Master Wind Turbine Plan

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The following map shows the installation of turbines that CBEE is using to collect data.

           
In Brazil, the CBEE has been operating since 1996 as a research and testing facility in the city of Orinda, on the northeast tip of the country.  CBEE's projects have been developed through several contracts with government and private institutions. Pioneering research and development projects in Brazil are in progress.  One such project, called FINEP (Studies and Projects Sponsoring Foundation) / Ministry of Science and Technology), focuses on building instrumentation infra-structure for wind turbine testing;
An important component of the growth of wind power installations in the country is the political support for this work that has manifested itself in budgetary allocations for the center (Which Center? Is CBEE a center?) as well as for the renewable energy department at the supporting research university. 
The fundamental national support detailed above enables international supporters to collaborate.  Without national support in the areas of policy, finances, scientific research, the market for wind power would not exist since it cannot be stimulated by the mere existence of these technologies.  Wind technologies must be adapted to the location in which they will be used and successful financing programs must be developed for the expansion of this work.  The intellectual force of CBEE's team conducting data collection and analysis manifests itself in successful estimations of the potential wind power resources and operating capacities annually.

 

Technology Assessment

Wind turbines are a successful power producing technology.  While the industry does suffer from some setbacks, it is continuing to make advances that further improve a wind turbine’s reliability and efficiency.  The technology assessment will cover the background of how a wind turbine works, the current limitations experienced by the wind industry, the current technology, the new opportunities for improvement in design and cost-effectiveness that exist in the development of turbines optimized for low wind speed, and how the Wind Turbine Company’s design fits into this puzzle.

The Parts of a Wind Turbine

 

Turbine Technical Drawing Enlarged
Source: NREL

  • For definitions of the wind turbine components, please refer to Appendix B.
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How Wind Works

Wind turbine power is calculated with the following equation:
P = 0.5 x ρ x A x Cp x V3 x Ng x Nb
where
P = power in Watts
ρ = air density (kg/m3)
A = rotor swept area (m2)
Cp = coefficient of performance (a 59% energy conversion efficiency is the maximum achievable, but 35% is considered a good design)
V = wind speed (m/s)
Ng = generator efficiency
Nb = gearbox/bearing efficiency (not all turbines use gearboxes)

Wind power is a function of the cube of its speed.  Therefore, higher wind speeds are more desirable.  Higher wind speeds can be achieved by optimal site location and/or elevating the turbine to an increased height where the wind is faster.  This is the definition of wind shear: higher speed winds can be achieved at higher elevations.

Also,
Wind Energy = Power x Time.

This means that wind energy is dependent on the length of time the turbine produces power.  A turbine should be evaluated on its energy production (kW-hrs) and not just its rated power output (kW).   The rated power output is only the turbine’s potential power output at optimal conditions.


The Brazilian Wind Energy Center was created with the following institutions support: the Ministry of Science and Technology, the Ministry of Environment, Water Resources and Legal Amazon, the Bank of Northeast of Brazil (BNB), Studies and Projects Sponsoring Foundation (FINEP), the National Council for Scientific and Technologic Development (CNPq), and with resources of the state of Pernambuco (the state energy company, the Secretary of Infrastructure, Science and Technology sponsoring foundation (FACERE).

 



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