This document summarizes an experimental analysis of a flywheel used in a mechanics lab at Khulna University of Engineering & Technology. The objectives were to observe how energy is stored in a flywheel and to determine potential and kinetic energy through experimentation. Data was collected on the potential and kinetic energy of the flywheel at various loads. The results showed that the potential energy decreased as load increased, in line with theoretical expectations. Kinetic energy also decreased with increasing load, verifying the law of conservation of energy. The flywheel's ability to store rotational energy has various applications.

1. Experimental Analysis of Fly Wheel Used In Mechanics LAB,
ME department, KUET
By
Md. Tanvir Khan (Anik)
Department of Mechanical Engineering
Khulna University of Engineering & Technology
The special works submitted in partial fulfillment of the requirements for
2nd
Year, ME 2210, in
Department of Mechanical Engineering
Khulna University of Engineering & Technology
Khulna 920300, Bangladesh
14 February, 2016

2. ACKNOWLEDGEMENT
Alhamdulillah, at first many many thanks to almighty Allah who makes me capable to complete
this special work carefully and successfully. Then I would like to thank my special work
supervisors and course teachers Dr. Sobahan Mia and Mr. Dipayan Mondal of Department of
Mechanical Engineering of Khulna University of Engineering & Technology, Bangladesh, for
their proper supervision, guidance, inspiration, suggestion and all kinds of supports in performing
and completing the dissertation work in time. I also felt my heart-felt gratitude to the head of the
department professor Dr. Nawsher Ali Moral who tolerated our short comings, showed his
patience in our all kind of activities relevant to research works and made me confident enough in
the research field. I also would like to express my sincere gratitude and thanks to the vice
chancellor Dr. Muhammed Alamgir, Khulna University of Engineering & Technology,
Bangladesh for his cordial cooperation. I also want to thank all the lab demonstrators who help me
to complete this special work perfectly and successfully.
Author
II

3. ABSTRACT
The utilizations of stored flywheel energy are huge and they are varied in different ways involving
a lot of applications, ranging from the potter's wheel used since many years before to the present
days energy recuperation in automotive vehicles and many other purposes. Generally, stored
flywheel energy can be used individually or in combination in three ways: by dissipation in
overcoming resistances, by exchange to potential energy, and by kinetic transfer to another mass.
This last method of utilization offers the greatest potential. Several research and development
programs applying this principle are described. Our concentration in this paper is the experimental
analysis of the fly wheel used in mechanics lab, ME department, KUET. The main objectives of
this special work were to observe the characteristics of storing energy in a flywheel and to
determine the potential and kinetic energy through a particular procedure. Moreover the law of
conservation of energy was verified. By completing the experiment I will be able to know the
different applications of flywheel in various practical sectors where stored energy is barely needed.
I will also know the mechanism of storing energy in a flywheel and give the energy back when
necessary.
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4. Content
PAGE
Title page I
Acknowledgement II
Abstract III
Contents IV
List of tables VI
List of figures VII
List of illustration
Nomenclature VIII
CHAPTER I Introduction 1
1.1 Overview 1
1.2 Objectives 1
1.3 Outlines 1
1.4 Mechanism of transferring energy 2
1.5 Types of flywheel 2
CHAPTER II History and Background 7
2.1 Ancient flywheels 7
2.2 Flywheels of the Industrial Revolution 7
2.3 Modern flywheels 8
CHAPTER III Working Principle of Flywheel 10
3.1 Conservation laws 10
3.2 Process of storing energy in flywheel 11
3.3 Storage of energy 12
3.4 The Basics 13
3.5 Clean Source Flywheel
3.6 Retaining energy of fly wheel
13
14
CHAPTER IV Theory 15
4.1 For potential energy 15
4.2 For kinetic energy 15
4.3 Apparatus required 16
CHAPTER V Working Procedure 17
CHAPTER VI Experimental Data 18
6.1 Data table for potential energy: 18
6.2 Data for kinetic energy 18
IV

5. CHAPTER VII Result and Discussion 19
7.1 Result interpretation 19
7.2 Discussion 21
CHAPTER VIII Application 22
CHAPTER IX Advantages and disadvantages of flywheels 24
9.1 Advantage 24
9.2 Disadvantage 24
References 25
V

6. List of Tables
Table No Description Page
6.1 Data for potential energy 18
6.2 Data for kinetic energy 18
7.1.1 Result interpretation for potential energy 19
7.1.2 Result interpretation for kinetic energy 19
VI

7. List of Figures
Figure No DESCRIPTION Page No
01 Simple flywheel 02
02 Naturally aspirated flywheels 03
03 Dual mass flywheels 03
04 Speed turbo flywheels 04
05 Some types of flywheel 05
06 Ancient flywheel 07
07 Modern flywheel 09
08 Energy balancing graph 12
09 Complex flywheel 13
10 Clean source flywheel 13
11 Retaining energy 14
12 Flywheel arrangement 17
13 Initial potential energy Vs. Load diagram 19
14 Final potential energy Vs. Load diagram 20
15 Kinetic energy Vs. Load diagram 20
16 Applications of flywheel 23
VII

8. Nomenclature
Symbol Name Unit
W Weight N
H1, H2 Height m
t Time s
n Revolution
VIII