PowerPoint Presentation

Design and optimization of a Stirling engine and its application in generating electrical power

ENGD3000 FINAL YEAR PROJECTALEKSANDRA MONIKA ZARZYCKAP12224099

ACADEMIC YEAR 2015/16SUPERVISOR DR JOHN GOW

What is a Stirling engine?

External combustion engine

Works on regenerative thermodynamic cycle

Converts the change of the volume of the working gas into a mechanical power

Adventages

Dont produce any exhaust gasses

Can operate on wide range of heat sourcesFossil fuels can be exchanged for clean source energyCan be coupled with motor generator

Aims and objectivesIncrease mechanical efficiency

Adapt the design for manufacture at the university

Change the bell crank mechanism to a simpler solution

Incorporate generator into the design

Compression

HeatingExpansion

Cooling

PV

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How does the Stirling Engine work?A brief explanation of an ideal Stirling Cycle

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Schmidts methodA numerical calculation of a thermal cycle based on an ideal gas law

Design choice

Original drawings were issued in 1971 by a Dutch engineer called J. Coolegem.As the technology has progressed vastly through the past 45 years, the original design could be verified by using computerised methods.

Kinematics

Original Design

Bell crank mechanismSimple frameBrass spirit burnerHeat capturing coverNew Design

Key design changes

Cylinder MountFlywheel Positioning PlateCrank CarrierBrace Plate

Connecting Rods90 degree phase Crank assembly

PrototypeSummary of testing process

Air leak test

Use of different lubricants

Testing different pistons

PTFE testing

Checking components

Final test

Conclusions

Analysis of a thermodynamic cycleComplete 3D design of an engine with manufacturing drawingsMechanical tests completedWorking prototypeMotor generator

DESIGN ANDOPTIMISATIONOF A STIRLINGENGINE

ENGD3000 FINAL YEAR PROJECTALEKSANDRA MONIKA ZARZYCKAP12224099

ACADEMIC YEAR 2015/16SUPERVISOR DR JOHN GOW