Energy Efficiency

• Waste energy

  • Waste energy occurs when energy changes into a form that is not used.
  • Heat energy is the most common form of waste energy.
• Energy Efficiency

  Uses less energy to perform the same task

  • It refers to the % of energy converted into USEFUL rather than wasted energy.
  • Efficiency is calculated as: Efficiency (%) = useful energy output/ total energy input x 100%