FLYWHEEL LABORATORY EXPERIMENT

* Denotes a required field.

W
W
W
W
W
W


ABSTRACT
In this experiment, students will obtain knowledge about gravitational potential energy, generated electrical energy and rotational kinetic energy. Students will study the storage of rotational kinetic energy of a flywheel attached to a generator. By dropping a mass, connected by a string to a generator a distance, students will be able to measure generated voltage and calculate the power that was generated by the mass.

INTRODUCTION
Many of the renewable resources that are examined in this class involve converting rotational energy into electrical energy. The rotational energy can be derived from wind, water falling, ocean waves, etc. Each one of these renewable resources is utilized by placing an impeller in a location susceptible to high wind or rushing water. The renewable energy causes the impeller to rotate, which rotates a magnet surrounded by coil to generate an electrical current. In this lab, students will use the same kind of force that powers many types of hydroelectric power plants. The goal for this lab is for students to gain understanding of rotational energy, and its role as a renewable energy source.

PROCEDURE
  1. Watch and follow the instructions on the instructional video below.

  2. The string should be approximately 2 feet long.

  3. Tie a quadruple knot in the string, and hook the knot in the slot on the pulley.

  4. Attach the other end of the string to the hanging mass.

  5. Wind the string up on the smallest pulley, such that the string falls out when the mass reaches the bottom of the plastic bucket.

  6. Adjust the position of the hanging mass or the height of the generator so that the knot slips out just as the mass reaches the plastic bucket.

  7. For demonstration: Insert the plug with the light into the banana jack, and watch the bulb light as you turn the generator.
    The red/green light diode shows that the generator produces an AC voltage.

  8. Watch and follow the instructions on the instructional video below.


  9. In LabView, click the stop button and observe generated Voltage vs. Time plot. Record the coordinates of one period below.
  10. Voltage (Volts)

    Time (seconds)


  11. Make a Power vs. Time plot using the following relation:
    Power = Voltage2 / Resistance

    Time (seconds)

    Power


  12. Generated electrical energy =


  13. PE = m * g * h =

  14. Efficiency = %

  15. Watch and follow the instructions on the instructional video below.

  16. Measure the mass of the flywheel. Ignore the small pulley.



  17. Watch and follow the instructions on the instructional video below.



  18. PE = m * g * h (J)

  19. (KErotation / PE) * 100% =



Thank you for participating in this laboratory experiment.


Please answer the following questions. Your answers will not be graded.