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Question 20

An engineering firm is evaluating two different regenerative braking energy recovery systems for a new hybrid locomotive:

  • System X (Flywheel Kinetic Storage):

    • Energy stored per 50 kg of flywheel assembly = 12,500 kJ12,500\text{ kJ}12,500 kJ
    • Percentage of stored energy lost to friction and heat = 18%

  • System Y (Supercapacitor Electrostatic Storage):

    • Energy stored per 50 kg of capacitor module = 4,500 kJ4,500\text{ kJ}4,500 kJ
    • Percentage of stored energy lost to thermal dissipation = 8%

Calculate the difference in the useful energy retrieved (in kJ\text{kJ}kJ) from 50 kg of storage medium between System X and System Y.

[3]
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1 Energy Questions

  1. GCSE
  2. /Physics
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