Wind Power 2017 Chinnok Invitational

The theoretical limit for the efficiency of a wind turbine is 59.3%, what is this ceiling called?

• Ohm’s Limit, or Ohm’s Law

• Joule’s Limit, or Joule’s Law

• Edison’s Limit, or Edison’s Law

• Betz’s Limit, or Betz’s Law

Identify the type of wind turbine pictured below:

What kind of energy do wind turbines convert into electromagnetic energy?

• Potential

• Chemical

• Thermal

• Gravitational

• Kinetic

What’s the most aerodynamically efficient number of blades for a practical wind turbine?

• 1

• 2

• 3

• 4

• 5

How much power is available in the wind with a wind speed of 78.2m/s and an air density of 0.408kg/m³, and a turbine sweep area of 1330m²?

• 40 MW

• 70 MW

• 100 MW

• 130 MW

• 160 MW

What is the effect of temperature on power transmission?

Identify the equation for power loss.

• P_L = I^2/R

• P_L = I^2R

• P_L = IR

• P_L = I/R^2

• P_L = R/I^2

Which of the following is the SI unit of resistance?

• Amps

• Farads

• Ohms

What’s the most commonly-used conductor metal for overhead power lines?

• Copper

• Silver

• Gold

• Zinc

• Aluminum

What is the primary disadvantage of HVDC over AC for long distance power transmission.

• Greater construction cost

• High power loss in transmission

• Danger to birds

• Difficulty to integrate with renewable energy sources

• Expensive conversion stations