Fabrication of Domestic Deep Freezer

ABSTRACT

Refrigeration is term used to denote the maintenance of a body at a temperature lower than that of its surroundings. The applications of refrigeration are many and varied. In addition to the common applications of refrigerationin the manufacture of ice, in the preservation of foods, in air-conditioning filed, and in the creation of skating rinks, the refrigeration effect is also used in the presentation of blood plasma, in the low-temperature treatment of metals and in the liquefaction of gasses. Each application requires a different temperature for the refrigerated space. This project adopts the basic principle of refrigeration to construct a portable deep freezer The historical development of refrigeration system was discussed along with types of refrigeration system, its impact in our life, how it works and so on. Materials for each component were carefully selected. troubleshooting was included in this report to guide the user on repair and maintenance procedures the total the length of the deep freezer is 99 0mm while the base of the bottom is 750mm, the cabinet cover is 1200mm and his side is 750mm. the special feature are aluminum, thermostat, evaporator pipe, drier cooling fan, polystyrene and TL danfos compressor while the cooling temperature is 125°f

TABLE OF CONTENT

Title page                                                                               i

Approval page                                                                       ii

Dedication                                                                             iii

Acknowledgement                                                                 iv

Abstract                                                                                v

Table of Content                                                                   vi

List of Tables                                                                         ix

List of Figure                                                                         x

CHAPTER ONE: Introduction

1.1 History of Refrigeration                                                  1

1.2 Important of Refrigeration Application                          2

1.3 Freezer                                                                            4

1.4 Impact of Life Cycle                                                        5

1.5 Aims and Objectives                                                       6

CHAPTER TWO: LITERATURE REVIEW

2.1 Absorption System of Refrigeration                               7

2.2 Mechanism of Absorption system Process                    8

2.3 Vapor Compression System                                           9

CHAPTER THREE: ANALYSIS OF REFRIGERATION SYSTEM AND CHOICE OF PROJECT AS BEST

3.0   The Cycle Operation of Vapor Compression               12

3.1   Types of Gas Compressor                                            13

3.2   Thermodynamic Analysis of the System                     14

3.3.1         The Compressor                                                  17

3.3.2         The Condenser                                                     18

3.3.3         The Evaporator                                                    20

3.3.4         Capillary Tube                                                     21

3.3.5         Drier                                                                     21

3.3.6         Lagging Materials                                                 21

3.3.7         The Thermostat                                                    22

3.3.8         Cooling Fan                                                          23

3.3.9         Sheet Metal                                                          23

3.3.10       Refrigeration                                                         23

CHAPTER FOUR: MATERIAL SELECTION, FABRICATION DETAILS AND ASSEMBLY

4.1    Material Selection, Fabrication Details and

Assembly                                                                      26

4.2    Assembly and Installation                                            27            

4.2.1 Lagging Material and Facing Aluminum Sheet          27

4.2.2 Painting                                                                        27

4.2.3 Charging                                                                      27

4.2.4 Testing                                                                         28

4.3 Bill of Engineering Material and Evaluation                 28

4.4 Trouble Shooting and Service Chart.                             30

CHAPTER FIVE: RECOMMENDATION AND CONCLUSION

5.1 Recommendation                                                            32

5.2 Conclusion                                                                      32

Reference                                                                               34