Problem 2: Pedal Power
Many villages in the developing world lack access to electricity.
One proposed solution is the ‘Free Electric’ bicycle, which is a
stationary bike hooked up to a generator and battery. Pedaling the
bike powers the generator, which creates electricity that is stored
in the battery. The inventor claims that 1 hour on the bike can
produce a whole day of electricity. Let’s put it to the test!
Assume the following: The human body is 25% efficient in
converting food to mechanical kinetic energy. An adult can
maintain a mechanical power output of 125 W sustained over an hour
of biking.
Problem 2: Pedal Power Many villages in the developing world lack access to electricity. One proposed...
Need help on part D & E Problem 2: Pedal Power Many villages in the developing world lack access to electricity. One proposed solution is the ‘Free Electric’ bicycle, which is a stationary bike hooked up to a generator and battery. Pedaling the bike powers the generator, which creates electricity that is stored in the battery. The inventor claims that 1 hour on the bike can produce a whole day of electricity. Let’s put it to the test! Assume the...
Your friend decides to go off gridand generate their electricity with a stationary bicycle electric generator (solar not an option at their cabin in the deep redwood forest). They have only two essential items that require electricity: a laptop and refrigerator. The laptop uses 45 W to operate, and a small (2 cubic foot)energy efficient refrigerator uses 30 W. Your friend schemes a plan to ride the bike to charge batteries to run the laptop and refrigerator. The pedal powered...
2. For the ideal Rankine cycle case where the feed pump and turbine are isentropic, and the electric motor on the feed pump and the electric generator are 100% efficient: a. Determine the specific enthalpy of the refrigerant at the entry and exit of the feed pump, and the entry and exit of the turbine; (8 Marks – 2 marks each) b. Sketch and label the ideal process paths of the cycle on a T-s diagram, an h-s diagram and...