29 Questions
What is the purpose of a turbine in a wind energy system?
To convert wind energy into mechanical energy
How are wind turbines classified based on their orientation?
Vertical axis and horizontal axis
What is the function of the generator in a wind energy system?
To convert mechanical energy into electricity
Which type of generator does not require a rectifier for DC voltage?
DC Generator
What is a disadvantage of an AC Induction Generator?
It requires sources of reactive power to self-excite
Why do Brushless Synchronous Generators not need pitch-angle control?
They can self-excite easily
What causes winds according to the text?
Irregularities in the surface of earth
Which type of wind turbine is known for advantages such as high efficiency and easy maintenance?
Horizontal axis wind turbines (HAWTs)
What is the main function of a wind turbine according to the text?
Converting the kinetic energy of wind into mechanical energy
What do wind turbines use to produce electricity?
Mechanical energy
Which type of machine is best suited for areas with consistent wind direction?
Upwind machines
What aspect of the site conditions can lead to different wind resources at two places in hilly terrain?
Exposure to the prevailing wind's direction
Apart from generating electricity, what other functions can mechanical energy from fast blowing winds serve?
Pumping water and grinding grains
Which of the following is NOT listed as an application of Wind Energy Conversion Systems (WECS)?
A boat using solar power
Which scale application of WECS involves systems that are connected to the utility grid?
Utility grid-connected WECS
Which wind turbine model is mentioned as being installed in a village on Xiao Qing Dao Island?
Bergey Excel 10 kW wind turbine
Which of the following territories is NOT mentioned as a location for the application of Village electrification system using WECS?
Xiao Qing Dao Island
What is the relationship between wind speed and wind energy?
Wind energy is directly proportional to wind speed
Why are modern wind turbines taller than old windmills?
To increase energy production by capturing higher wind speeds
In which months does wind energy perform best according to the text?
Winter months
Why is understanding wind characteristics over multiple years important?
To ensure the longevity and efficiency of wind turbines
What major factor contributes to the economical operation of wind power?
Seamless integration into the grid
What is the impact of the uniqueness of the wind at each site?
It indicates the need to measure local wind characteristics
What type of wind turbine is most commonly used in commercial applications?
Horizontal-axis-wind-turbine (HAWT)
What is the purpose of the wind shaft in a wind turbine?
To run the wind generator
What component of a wind turbine is designed to minimize the chances of damage from wind storms?
Rotor blades that pitch
What helps a wind turbine access stronger winds in the area?
Use of wind shear
Which feature of Horizontal-axis wind turbines (HAWTs) allows for the installation of larger turbines in offshore locations and uneven land areas?
Tall towers
What is referred to as the angle to the wind stream in a wind turbine?
Angle of attack
Explore the fundamental elements of Wind Energy Conversion Systems (WECs) including support towers, wind turbine types (HAWTs and VAWTs), advantages, disadvantages, upwind and downwind machines, schemes for generating electricity, siting and sizing considerations, and applications of WECs. Learn about the connection between wind energy and solar energy.
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