U.S. Department of Energy - Energy Efficiency and Renewable Energy

Multimedia

Animations

These animations illustrate technologies and concepts from the Office of Energy Efficiency and Renewable Energy's (EERE) programs. Animations about EERE's work in geothermal energy, hydrogen, industrial energy efficiency, solar energy, vehicle technologies, and wind energy are available here.

Geothermal

Illustration of a geothermal power plant.
Illustration of an enhanced geothermal plan, which sits on top of an underground geothermal reservoir.

How an Enhanced Geothermal System Works

Explains how an enhanced geothermal system functions.


Illustration of a home with a geothermal heat pump, showing heat entering a building.

Geothermal Heat Pumps — Heating Mode

Shows how geothermal heat pumps heat your home.


Illustration of home with a geothermal heat pump, showing heat exiting a building.

Geothermal Heat Pumps — Cooling Mode

Shows how geothermal heat pumps cool your home.



Hydrogen

Illustration of a fuel cell.

How Fuel Cells Work

Shows how a polymer electrolyte membrane (PEM) fuel cell works (PEM fuel cells are the most common type used in light-duty fuel cell vehicles).


Illustration of the inside of a hydrogen-fueled vehicle, showing the connections between the hydrogen fuel cell and the engine.

Hydrogen Fueled Vehicles Have Multiple Safety Systems

Illustrates how multiple safety systems are integrated into the design of hydrogen-fueled vehicles.



Solar Energy

Illustration of a machine used in the development of solar cells.

Solar Energy Technologies Office Animations

See animations from the Solar Energy Technologies Office on its multimedia website.



Vehicles

Illustration of the inside of a vehicle, showing the connections between the electric motor, the gasoline engine, and the battery.

How Hybrid Electric Vehicles Work

Explains how hybrid vehicles work by showing energy flow among components during various driving activities.



Wind Energy

Illustration of the inside of a wind turbine.

How Does a Wind Turbine Work?

Shows how wind turbines operate and produce electricity for homes or other buildings.


Installed Wind Capacity Animation

Shows the progress of installed wind capacity from 1999 to present.