DESIGN AND FABRICATION OF A MOBILE DEEP FREEZER

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DESIGN AND FABRICATION OF A MOBILE DEEP FREEZER

ABSTRACT

This write up is a defeat of the process and formulation of plans for the physical realization of the construction of a mobile deep freezer. It is divided in chapters which discussed extensively on the practical refrigeration system with full attention given design factors, working principle and choice of material.

It is strongly believed that this will make and interesting study for inquisitive minds and collection of facts further related work.

NOMENCLATURE

M = Mass

A = Area

S = Enthropy

V = Volume

M = mass flow rate

D = Diameter

Gr = Gravity

P = (rho) Density

t = Temperature Different

h = Enthalpy

Q = Heat Quantity

hl = Latent heat of fusion

Gr = Equivalent load

L = Length

P = Pressure

T = Temperature

U = Internal energy

K = Thermal conductivity

X = Material thickness

COP = Coefficient of performance

Q = Heat transfer per area

H.P = Horse power

Vs = Swept vol.

A.C = Alternating current

C = Specific heat.

TABLE OF CONTENTS

Title Page

Letter of Transmittal

Signature Page

Release Page

Dedication

Acknowledgement

Abstract

Nomenclature

Table of Contents

CHAPTER ONE

1.0 Introduction

1.1 The Purpose of the Design

1.2 The Importance and Specification of the Design

1.3 Scope and Limitation

1.4 Statement of the Problem

1.5 Assumption

1.6 Definition of Terms

CHAPTER TWO

2.0 Literature Review

The Relation of Refrigeration System to Thermodynamics Principle

2.1 The Carnot Cycle

2.2 Reversed Carnot Cycle (Ref Cycle)

2.3 The Coefficient of Performance

2.4 Practical Ideal Ref Cycle (Modified Carnot Cycle)

2.5 Refrigeration Plant with Isentropic Efficiency

2.6 Refrigeration

2.7 Refrigeration Capacity

2.8 Wet Versus Dry Compression

2.9 Standard and Actual Vapour Compression Cycle

CHAPTER THREE

3.0 The Basic Component of Deep Foreign

3.1 Description Refrigeration Cycle

3.2 Mechanical Refrigeration Cycle

3.3 Construction Method and Procedures

3.4 Construction of Outer Cabinet

3.5 Construction of Inner Cabinet

3.6 Construction of Base Structure

3.7 Laying of Evaporator Pipe

3.8 Arrangement of Components

3.9 Assembling of Units

CHAPTER FOUR

4.0 Analysis and Calculation as it Relates to Deep Freezer or Ref. System

4.1 Cooling Load Calculation

4.2 Heat Leakage Through Boundaries

4.3 Product Load

4.4 Air Change Load

4.5 Miscellaneous Load

4.6 Determination of Standard Component

4.7 Piston Displacement

4.8 Coefficient of Performance

CHAPTER FIVE

5.0 Choice of Refrigeration

5.1 Dryness Fraction or Quality of Ref.

5.2 Desired Properties of Refrigeration

5.3 Phase Separation

5.4 Mixability

5.5 Thermal Properties of Refrigeration

5.6 Lubrication

CHAPTER SIX

6.0 Mode of Operation

6.1 Refrigeration Application

6.2 Maintenance of Deep Freezer

6.3 Problem and Remedy

6.4 Cost Evaluation

6.5 Recommendation

6.6 Conclusion

6.7 References

DESIGN AND FABRICATION OF A MOBILE DEEP FREEZER

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