Design And Construction Of A Dc Electric Cooker

ABSTRACT

Ever since early humans discovered how to make fire, people have been eager to cook with it. Over time, cooking techniques have become ever more sophisticated and efficient and more portable and compact. Today, one of the leading and most benefit-rich cooking methods is “induction.”

Induction is the fastest-growing cooking technology in Nigeria presently. Induction is a term that refers to a specific method for generating heat. Induction cooking is performed using direct induction heating of cooking vessels, rather than relying on indirect radiation, convection, or thermal conduction. Induction cooking allows high power and very rapid increases in temperature to be achieved, and changes in heat settings are instantaneous. This work is aimed at building an inductive based dc powered cooker.

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWLEDGEMENT

ABSTRACT

CHAPTER ONE

1.0      INTRODUCTION

1.1      BACKGROUND OF STUDY

• PROBLEM STATEMENT
• AIM AND OBJECTIVE OF THE PROJECT
• SCOPE OF THE PROJECT
• SIGNIFICANCE OF THE PROJECT
• BENEFIT OF THE PROJECT
• LIMITATION OF THE PROJECT

CHAPTER TWO

LITERATURE REVIEW

• REVIEW OF THE STUDY
• REVIEW OF THE STUDY
• REVIEW OF DIFFERENT TYPES OF COOKER
• REVIEW OF INDUCTIVE COOKING
• REVIEW OF MICHAEL FARADAY’S LAW OF INDUCTION
• FACTORS TO BE CONSIDERED WHILE DESIGNING INDUCTION COIL SYSTEM
• INDUCTION HEATING FORMULA
• INDUCTION HEATING COIL DESIGN
• APPLICATIONS OF INDUCTIVE COIL

CHAPTER THREE

3.0     METHODOLOGY

3.1      SYSTEM BLOCK DIAGRAM

3.2      SYSTEM DESCRIPTION

3.3      SYSTEM CIRCUIT DIAGRAM

3.4      PARTS LIST

3.5      SYSTEM UNIT DESIGN

CHAPTER FOUR

TEST AND RESULT ANALYSIS

• CONSTRUCTION PROCEDURE
• CASING AND PACKAGING
• ASSEMBLING OF SECTIONS
• TESTING OF SYSTEM OPERATION
• DESIGN LIMITATION

CHAPTER FIVE

5.0      CONCLUSION, RECOMMENDATION AND REFERENCES

• CONCLUSION
• RECOMMENDATION

REFERENCES

CHAPTER ONE

1.0                                                        INTRODUCTION

1.1                                           BACKGROUND OF THE STUDY

An electric cooker is an electric powered cooking device for heating and cooking of food. A conventional cooker is powered by electricity. Usually they have four rings on top of the hob. The proposed system is on a dc operated electric cooker which is powered by rechargeable battery or any other 12v source.

The concept of this cooker is through inductive heating instead of using heating element – as it is been used in conventional cooker which makes it a high current device. Induction heating is the process of heating an electrically conducting object by electromagnetic induction, through heat generated in the object by eddy currents (John, 2014). An induction heating system consists of an electromagnet, and an electronic oscillator that passes a high-frequency alternating current (AC) through the electromagnet. The rapidly alternating magnetic field penetrates the object, generating electric currents inside the conductor called eddy currents (John, 2014). The eddy currents flowing through the resistance of the material heat it by Joule heating. In ferromagnetic materials like iron, heat may also be generated by magnetic hysteresis losses. The frequency of current used depends on the object size, material type, coupling and the penetration depth.

An important feature of the induction heating process is that the heat is generated inside the object itself, instead of by an external heat source via heat conduction (John, 2014). Thus objects can be heated very rapidly. In addition there need not be any external contact, which can be important where contamination is an issue. Induction heating is used in many industrial processes, such as heat treatment in metallurgy, Czochralski crystal growth and zone refining used in the semiconductor industry, and to melt refractory metals which require very high temperatures. It is also used in induction cooktops for heating containers of food; this is called induction cooking (Strickland, 2011).

An induction cooker is a key piece of equipment used in all forms of induction heating. Typically an induction heater operates at either medium frequency (MF) or radio frequency (RF) ranges (Strickland, 2011).  However, this work is based on building  an induction based dc electric cooker.

1.2                                                  PROBLEM STATEMENT

Traditional cooking involves using kerosine, gas, firewood and charcoals as source of energy, but the risk of using these energy sources is that they produce carbon monoxide and the cost of getting them is too high. When these challenges was discovered it led to discovery of electric powered cooker which is liable of consuming high electric unit due to the high power element used. To solve all these challenges a dc solar cooker was invented which has numerous advantage that overcome the challenges of all the conventional cooker such as –  it does not produce carbon monoxide, No more gas or kerosene is exhausted or high electricity bills, it consumes less power and no more buying kerosine, gas, firewood and charcoals.

1.3                                    AIM AND OBJECTIVES OF THE STUDY

The main aim of this work is to build a dc powered electric cooker using inductive heating system. The objectives of the study are:

1. To build the system prototype
2. To save money and energy

• To protect or environment from carbon monoxide emission thereby promoting good health.

1.4                                                   SCOPE OF THE STUDY

The concept of a dc electric cooker involves induction heating. Induction heating is the process of heating an electrically conducting object by electromagnetic induction, through heat generated in the object by eddy currents. An induction heater consists of an electromagnet and an electronic oscillator that passes a high-frequency alternating current through the electromagnet and it is powered using a 12v dc.

1.5                                           SIGNIFICANCE OF THE STUDY

This study will serve as a means of studying the operation and workings of cooker involves induction heating. This study will serve as a means learning how to conserve energy by reducing energy consumption of a device so that it can be powered by a dc source such as battery or solar panel.

1.6                                               BENEFIT OF THE PROJECT

Benefits of using dc powered electric cooker are:

1. It has no negative side effect on health
2. No radiation.

• No electromagnetic wave radiation c.

1. Suitable for pregnant women, old people and children to use because low risk of electric shock.
2. Does not produce carbon monoxide i.e Smokeless
3. Consumers choose dc powered electric based on induction for its cleanability, safety, speed, and efficiency.

1.7                                                            LIMITATION

This device is powered with 12V and the induction coil is rated 200w.