INTRO TO POWER AND ENERGY

Department of Technology

Appalachian State University

What is Energy?

Ability to do work; a force

QUESTION: What are some examples of sources of energy?

Why do we need energy?

Everything:EatStay wormStay coolWorkRecreation

Forms of Energy

Thermal Chemical Electrical Radiant Mechanical Acoustic (Sound) Nuclear

Energy Transfer

Energy transfer devices use an energy input to produce an output.

Example: Gas engine

Gas engines use chemical energy to produce rotary (mechanical) motion.

Renewable vs. Non-renewable

Non-Renewable

Energy forms that are not reproduced as fast as we use them.

Examples:

Fossil Fuels: (Coal, Gas, Oil)

Nuclear

Question:

Why are they helpful?

Problems with Non-Renewables

Pollution

Depletion

Renewable Energy Sources of energy that can reproduce as fast as we

use them.

Examples:

Wind

Solar

Hydro

Biomass

Question:

Why are they helpful?

What is Power?

The rate at which work is done or energy is transferred.

QUESTION: How is power measured? Horse PowerWattsDecibels

Activities

Break up into groups and cycle throughout the different activities.

Bike Generator Personal Horsepower Micro-Hydro Sustainability Trailer Solar Thermal Recycling