Flywheel Design

Topics: Energy storage, Flywheel energy storage, Kinetic energy Pages: 23 (3875 words) Published: October 21, 2013
Design of flywheel for improved energy storage
using computer aided analysis
A Project Report
Submitted in partial fulfilment for the award of the degree
Of

BACHELOR OF TECHNOLOGY
IN
MECHANICAL ENGINEERING

By
Michael Mathew (10503047)
Under the guidance of
Prof. N.Kavi
Professor, Department of mechanical engineering

Department of Mechanical Engineering
National Institute of Technology
Rourkela,769008 (2008-2009)

i

Design of flywheel for improved energy storage
using computer aided analysis
A Project Report
Submitted in partial fulfilment for the award of the degree
Of

BACHELOR OF TECHNOLOGY
IN
MECHANICAL ENGINEERING

By
Michael Mathew (10503047)
Under the guidance of
Prof. N.Kavi
Professor, Department of mechanical engineering

Department of Mechanical Engineering
National Institute of Technology
Rourkela,769008 (2008-2009)

ii

CERTIFICATE
This is to certify that the thesis entitled, “Flywheel geometry design for improved energy storage using computer aided analysis” submitted by Sri Michael Mathew in partial fulfilments for the requirements for the award of Bachelor of Technology Degree in Mechanical Engineering at National Institute of Technology, Rourkela (Deemed University) is an authentic work carried out by him under my supervision and guidance.

To the best of my knowledge, the matter embodied in the thesis has not been submitted to any other University / Institute for the award of any Degree or Diploma.

Date:

Prof. N.Kavi
Dept. of Mechanical Engineering
National Institute of Technology
Rourkela - 769008

iii

ACKNOWLEDGEMENT
I place on record and warmly acknowledge the continuous encouragement, invaluable supervision, timely suggestions and inspired guidance offered by our guide Prof. N.Kavi, Professor, Department of Mechanical Engineering, National Institute of Technology, Rourkela, in bringing this report to a successful completion. I am grateful to Prof. R.K.Sahoo, Head of the Department of Mechanical Engineering, for permitting me to make use of the facilities available in the department to carry out the project successfully. Last but not the least I express my sincere thanks to all of my friends who have patiently extended all sorts of help for accomplishing this undertaking.

Finally I extend my gratefulness to one and all who are directly or indirectly involved in the successful completion of this project work.

Michael Mathew (10503047)
iv

Abstract:

Flywheels serve as kinetic energy storage and retrieval devices with the ability to deliver high output power at high rotational speeds as being one of the emerging energy storage technologies available today in various stages of development, especially in advanced technological areas, i.e., spacecrafts. Today, most of the research efforts are being spent on improving energy storage capability of flywheels to deliver high power at transfer times, lasting longer than conventional battery powered technologies.

Mainly, the

performance of a flywheel can be attributed to three factors, i.e., material strength, geometry (cross-section) and rotational speed. While material strength directly determines kinetic energy level that could be produced safely combined (coupled) with rotor speed, this study solely focuses on exploring the effects of flywheel geometry on its energy storage/deliver capability per unit mass, further defined as Specific Energy. Proposed computer aided analysis

and optimization procedure results show that smart design of

flywheel geometry could both have a significant effect on the Specific Energy performance and reduce the operational loads exerted on the shaft/bearings due to reduced mass at high rotational speeds. This paper specifically studies the most common five different geometries (i.e., straight/concave or convex shaped 2D

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Contents
List of figures
List of tables
Abstract

Chapter 1: Introduction of Flywheel
1.1 Introduction
1.2...
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