Design and fabrication of a pedal type carrot washing machine/ Nuwenshaba, Saviour

Contents
ABSTRACT i
DECLARATION it
APPROVAL iii
DEDICATION iv
ACKNOWLEDGEMENT v
List of figures vi
CHAPTER ONE 1
1.0 INTRODUCTION _ 1
1.1 Background to the Study 1
1.2 Problem Statement 2
1.3 Purpose of the study 3
1.4 Scope of study 3
1.5 Objectives 3
1.5.1 Main objective ~ 4
1.5.2 Specific objectives; 4
1.4 Justification 4
CHAPTER TWO 5
2.0 LITERA 11JRE REVIEW 5
2.1 Brief Description on carrots 5
2.2 Uses of Carrots 6
2.2.1 Value addition and development in carrots 7
2.3 Reason for Washing Carrots ~ 8
2.3.1 Possible outcomes of improper processing of carrots 9
2.4 Evaluation of time spent in washing carrot with traditional methods 9
2.5lnfluence of the Soil on Loosening and Cleaning factors 9
2.6 Existing Technologies for Washing Agricultural Materials 10
2.6.1 Manual Methods for washing carrots 10
2.2.3 Commercial Carrot Washer 12
2.2.4 Tractor operated carrot washer 12
2.2.5 Limitations and Benefits of the existing Technology 14
NUWENSHABA SAVIOUR BUlUG/2014/6
CHAPTER TlIREE: 17
MEffiODOLOGY 17
3.0 Design Methodology 17
3.1 Specific objective one: To design different components of a pedal type carrot washing
machine " _ _ _ _ 17
3.1.1 Design Parameters and Considerations 17
3.1.2 Machine description and working principle 18
3.1.3 Design of the components of the machine _ 20
3.2 Specific objective two: To fabricate and assemble the different machine components 25
3.2. ] Fabrication of the pedal type carrot washing machine 25
3.2.2. Material Selection criteria 25
3.2.3 Fabrication methods and processes used in the construction of the machine 27
3.3 Specific objective three: testing the performance of the machine 27
CHAPTER FOUR 28
4.0 RESULTS AND DISCUSSIONS 28
4.1 Design specifications _ 28
4.2 Mass flow rate of water ._._._ __._._. __ _ _ 28
4.2.1 Determination of flow velocity 28
4.2.2 Determination of Reynolds Number 29
4.2.3 Determination of the head loss from the system 29
4.2.4 Calculating for the volume of a hopper 30
4.3 Washing drums _ 30
4.3.1 Determination of inner and outer drum diameters 30
4.3.2 Determination of the weight of the washing drum and its contents 31
4.4 Angle of repose _.._ _ _ _ 37
4.5 Design of a flywheel _ 37
4.6 Design for chain and sprockets 38
4.7The Frame Isupport stands 38
4.8 Testing the prototype 39
4.9 Economic evaluation 39
CHAPTER FIVE 41
5.0 CONCLUSION AND RECOMMENDATIONS 41
5.1 conclusion 41
5.3 Recommendations 41
References 42

Includes bibliographies and appendices