80Cm X 70Cm X 50Cm Mobile Deep Freezer

Deepfreeze is a large home appliance that keeps its contents just below the freezing temperature. Freezers are electric and can be plugged into a standard household receptacle. A freezer is used for storing and extending the life of certain foods. There are various freezer capacity sizes on the market.  Freezer units are used in households and in industry and commerce. Food stored at or below −18 °C (0 °F) is safe indefinitely. Most household freezers maintain temperatures from −23 to −18 °C (−9 to 0 °F), although some freezer-only units can achieve −34 °C (−29 °F) and lower.

The need for an authentic and reliable report relating to the design and construction of 80cm x 70cm x 50cm mobile deep freezer is inevitable. It should be a top priority of every individual in order to avoid huge expenditure in purchase to foreign ones. Its for this reason that this report is written for the benefit of those who are privilege to design and construct their own deep freezer for used.This report is base on ordinary and advanced level research, in order to aid easy reading and understood for an average person.

This report is divided into chapters, which discussed extensively, the introduction of mobile deep freezer, the introduction of mobile deep freezer, the history the practical refrigeration cycle with full attention given to design factors, working principle and choice of materials. The method use in fabrication, assembly and knowing the safety requirement. Subsequently, advanced information pertaining calculation about the project have been given in certain section of this report which will be beneficial to those interested in the design and construction of 80cm x 70cm x 50cm mobile deep freezer.

TABLE OF CONTENTS
Title Page
Release Page
Signature Page
Approval Page
Dedication
Acknowledgement
Abstract
Table of Contents
Table of Illustration
List of Symbols
CHAPTER ONE
1.0 Introduction
1.1 What Prompted the Project
1.2 Purpose of the Project
1.3 Importance of the Project
1.4 Benefits of the Project
CHAPTER TWO
CHAPTER TWO
2.0 literature review
2.1 review of the study

2.2 refrigerants

2.3 requirements for refrigerants

2.4 identifying refrigerants by number

2.5 halide refrigerants

2.6 grouping and classification of refrigerants
CHAPTER THREE
3.0 Synthesis of Solution
3.1 Theory of Design and Analysis
3.2 Design Calculation
3.3 Determination of Compressor Size
3.4 Coefficient of Performance
CHAPTER FOUR
4.0 Construction Maintenance Procedures
4.1 Description of Materials Selected
4.2 Description of Tools / Equipment Used and Procedures
4.3 Assembly of the Work or Project
4.4 Testing and Evaluation
CHAPTER FIVE
5.0 Costing of the Project
5.1 Conclusion
5.2 Recommendation
5.3 References

CHAPTER ONE

1.0                                                        INTRODUCTION

The main objective of this project is to construct and fabricate a deep freezer. The purpose of a deep freezer is to extract as mush heat from the cold body as possible with the expenditure of as little work as possible. In the refrigeration cycle, a substance called the refrigerant is compressed, cooled and then expanded. In expanding the refrigerant absorbs heat its surrounding (the cooling compartment) to provide refrigeration. After the refrigerant absorbs heat from the source, the cycle is repeated.

The second chapter of these write-up ushers in a precise review of the history and literature of refrigeration from ancient man to modern day or contemporary man (i.e modern refrigerating equipment).

Chapter three deals in detail on the methods of calculating refrigeration equipment. Chapter four sequentially gives the overview of the factors, qualities and properties considered in choice decision of the material components (both standard/ranging engineering materials) used for the fabrication and the steps undergone in the assembly of the components to form the refrigerating equipment.

The fifth chapter analysis the material and labour cost incurred in the course of undertaking this project and summary is a low down of the maintenance and use instructions to be strictly adhered to in order to make the most effective, economic and efficient use of the refrigerating equipment as well as enable the equipment complete its service life. There is also a provision in this part for the notification of the usual defects observed or experienced during use and the corresponding panacea for them. Included is the reference for future consultancy which helps the student or reader who decides to embark on further research or a fact finding mission on innovations that may add as a filling to this work or to the topic as a whole.

This write-up within its scope is moderate sufficient to the educate the reader on the design and fabrication of a deep freezer.

1.4                                         WHAT PROMPTED THE PROJECT

We decided to embark on this project because of the deplorable situation we have noticed with some of our refrigeration system and the problem of where to preserve food in the department of the need arise, that we have produce and present this mobile deep freezer for use in the department for those who may wish to preserved their foods while at school before taking their home for consumption to avoid being spoil.

1.5                                              PURPOSE OF THE PROJECT

The objectives and purpose of this project is to achieve the following VIZ:

1. To design and construct portable domestic cooling equipment that would improve on existing design taken into consideration.
2. To design and construct a cooling / freezing system that is efficient with little or no complexity in maintenance.
3. To design and construct cooling equipment that will be mobile, economical and cost effective that even a common man can afford.
4. To produce a working and assembling drawing of the equipment through which further improvement / development can be base on.
5. To improve the design and construct portable cooling/freezing equipment with a reduce weight.

1.6                                          IMPORTANCE OF THE PROJECT

The importance attached to this design is the accomplishment of a fast freezing system without adverse effects on the food tissues, the flavours, freshness and nutrients of food materials. The design intention is based on reduced weight and cost, longer life span, fast freezing techniques, compactness, portability and more so to improve on existing design taking into consideration the Nigeria facto and possibility of expanding and marketability.

1.7                                             BENEFITS OF THE PROJECT

Food stuffs can then be preserved with the deep freezer for a very longtime to avoid being spoil before usage. The design and fabrication of the mobile deep freezer has broaden our practical knowledge and we can be scifrelical if one may decide to go into production in the near future and acts as a consultant. We can equally work efficiently without or with little guidance.

 

CHAPTER TWO

2.0                                 LITERATURE REVIEW

2.1                                   REVIEW OF THE STUDY

While it is only in recent years that refrigeration equipment has been mass-produced and widely used, its benefits will have been apparent to ancient man. The value of ice as a preservative was known and put to use thousands of years ago. In winter it was cut and moved into ice house which were built into the ground to make use of the insulating properties of social. Such a structure was described a Chinese poet, Shih ching about three thousand years ago. In the middle East and India, water was chilled by evaporating it through porous day pots which were buried overnight in favourable condition it could be made cold enough to form ice. The Indian Sub-continent also saw the first moves towards air conditioning…