Energy transfers

• Energy transfers:

  • Mechanical
  • Electrical
  • Heat
  • Radiation
• Ways to reduce energy waste:

  • Lubrication
  • Thermal insulation
• Thermal conductivity - the ability of a material to transfer heat energy from one place to another
• Efficiency = useful energy output / total energy input
• Efficiency can be increased by:

  • Reducing waste output
  • Recycling waste output