1. Energy Efficiency  When energy is converted from one form to another some energy is converted into other unintended forms.

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Presentation transcript:

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Energy Efficiency  When energy is converted from one form to another some energy is converted into other unintended forms.

Energy Efficiency Energy Conversion Device Energy Input Useful Energy Output Energy Dissipated to the Surroundings

Vehicle Efficiency – Gasoline Engine 25% Of the gasoline is used to propel a car, the rest is “lost” as heat. i.e an efficiency of 0.25

Efficiency of Some Common Devices Device Electric Motor Home Oil Furnace Home Coal Furnace Steam Boiler (power plant) Power Plant (thermal) Automobile Engine Light Bulb-Fluorescent Light Bulb -Incandescent Efficiency

Efficiency of Energy Conversion  If we are more efficient with the energy we already have there will be less pollution, less reliance on foreign energy sources.

Video  EaTM EaTM  -mhg -mhg

Assignment  Section 3.2 Questions 1-6

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