STIRLING ENGINE - GENERATOR

Guide: Mrs. SHANTHI ME, MBA

AP-II EEE

BATCH MEMBERS

M. Hari Shankar(44209105016)

S. Imran (44209105020) S. karthikeyan(44209105310)

OBJECTIVE

• To generate energy for local activities during power failure.

• To implement a mini power station for domestic activities.

• To Generate energy & save it for future use.

STIRLING GENERATOR

• Closed Cycle – the working medium never leaves the system.

• Reversible – the reverse reaction is also possible.

• External heat source – any heat source is valid, as long as it has sufficient heat to support the process.

STIRLING ENGINE

• First developed in 1816 by Dr. Robert STIRLING.

• After development, had little use until the mid 1900’s, when it became more common.

• Used today in many applications, primarily green energy, since the heat source can be anything (geothermal, solar, etc.)

COMPONENTS

• Uses pistons and cylinders to rotate a crankshaft

• Types– Alpha and Beta

• Alpha Stirling engines use two cylinders and two pistons

• Beta Stirling engines use one cylinder, one piston and a “displacer”

(In this project we use Beta-Sterling engine)

How It Works?? • When the heat energy is supplied, the base gets

heated up.

• This heats up the air – causing it to expand.

• This pushes the piston forward.

• The air gets cooled ( either by natural or forced cooling process)

• The Fly Wheel causes the piston to return to its original position.

• The process continues to get continuous motion of fly wheel.

• By constructing a generator around the fly wheel , energy can be harnessed.

Beta Stirling Engine

ENERGY INPUT TYPES

Stirling generator requires a heat source for producing energy. The heat energy can be of any type. Some examples are

• Solar energy

• Incandescent bulb

• Body heat

• Devices (computer, CPU etc)

CONSTRUCTION OF GENERATOR

A pair of permanent magnets.

Required size of cardboard.

Shaft as per required length.

Copper wire for windings.

PHYSICAL VIEW OF GENERATOR

GENERATOR

Output voltage is about 2v for the 200ft length of copper wire.

Output voltage is alternating current

We can convert this ac to dc using electronic valve.

Or we can charge the rechargeable battery.

SOLAR STIRLING GENERATOR

• Uses reflected sun rays as heat source

• Green energy

• Could power a house

SOLAR ENERGY – STIRLING GENERATOR

• Very large solar Stirling engine

• Could probably power a small city

Advantages

• Mechanically very simple in comparison to internal combustion engines

• Lightweight, compact

• Not limited by fuel or heat source

• Aside from a longer warm-up time, reliable in cold weather (unlike some engines)

References :

• http://en.wikipedia.org/wiki/Stirling_engine#The_Stirling_cycle

• http://www.howstuffworks.com/stirling-engine.htm

• http://www.stirlingengine.com/

• http://www.youtube.com/watch?v=UvrBzwBIFhM

• http://peswiki.com/energy/Directory:Stirling_Engines

THANK YOU