Abstract
This project work was embarked on the construction and determination of the efficiency of 12 volts DC fan using two N3055 transistor, 1kΩ variable resistors, resistors, breadboard, veroboard, 12 volts DC battery and connectors at Science Laboratory Technological Department, Federal Polytechnic Offa, Nigeria. This is always required to minimize, control or totally eliminate the power fluctuations received at the load end or consumer end that usually lead to the reduction of DC fan lifespan. With the constructed DC fan, measurements were carried out using 25 volts adjustable DC regulated power supply system to feed in variable voltage and determine the output voltage and current to calculate its efficiencies at different resistance. The efficiencies determined at different resistance were compare and contrast. The threshold voltage was also determined at a particular resistance. Therefore, its uses require adequate knowledge of threshold and steady voltage to keeps it working at its highest efficiency that can make it more durable and increase its lifespan. Hence, the result of this project work recommends constant power source with steady input voltage above its threshold voltage to keeps the regulator working at its highest efficiency that can make it more durable and increase its lifespan.
Table of Content
Title page i
Certification ii
Dedication iii
Acknowledgements iv
Abstract vi
CHAPTER ONE: INTRODUCTION
1.1 Background of Study 1
1.2 Statement of Problems 3
1.3 Aim and Objectives 3
1.4 Significance of Study 4
1.5 Definition of Terms 4
CHAPTER TWO: LITERATURE REVIEW
2.1 Historical Background 6
2.2 Major Components Required for DC Fan Regulator 7
2.3 Roles of Speed Control (IREA, 2016) 9
2.4 Methods of Speed Control (Ellis et al., 2001) 11
2.5 LM317 Voltage Regulator 16
CHAPTER THREE: METHODOLOGY
3.1 Study Area 20
3.2 Prototype Design 21
3.3 Procedures for Construction of 12 Volt Fan Regulator 21
3.4 Testing for the Continuity 22
3.5 Experimentation 22
3.6 Efficiency and Performance Evaluation 22
CHAPTER FOUR: RESULTS AND DISCUSSION
4.1 Results 24
4.2 Discussion of Results 37
CHAPTER FIVE: CONCLUSION AND RECOMMENDATION
5.1 Conclusion 38
5.2 Recommendation 39
References 40
