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Design And Fabrication Of Domestic Deep Freezer
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4.3.1 TYPES OF EVAPORATOR
Evaporators are mainly classified as:
i. The dry or direct expansion type
ii. The flooded type.
I. THE DRY OR DIRECT EXPANSION TYPE
A part of the heat transfer surface is used for superheating the vapor. Therefore refrigerant leaves the coil in a dry state that is as a dry vapor. [Althouse, A. D(1968)].
II. THE FLOODED TYPE
If flooded evaporators, the liquid refrigerant covers the entire heat- surface. As the liquid refrigerant leaves the evaporator, any liquid refrigerant present is recalculated, this allowing only slightly superheated gas to enter the compressor.
4.4 PRESSURE GAUGES AND THERMOMETERS
There are two (2) types of pressure gauges in refrigeration system:
i. One is to register pressure from high-side while
ii. The other register pressure at low-side of the system.
Thermometer is required to measure the high-side and low-side temperatures of the system. Both the thermometer and the pressure gauges are not required for the operation of the system, but they are mainly measuring instruments. [Gunther. C .R (1973)].
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ABSRACT - [ Total Page(s): 1 ]ABSTRACTThis project is on the design and fabrication of deep freezer for the preservation of items/products and making the items to cool. The project is able to develop a simple efficient economical and environmental friendly refrigeration system (A freezer) towards better technological advancement in Nigeria. This project modifies the existing refrigeration system with the use of R-600a which is ozone friendly, and non-contaminant like previous refrigerant of the hydrofluoric-carbon, HFC and C ... Continue reading---
LIST OF TABLES - [ Total Page(s): 1 ]LIST OF TABLE Table 1: Hydrocarbon refrigerant Application (Jones, W.p. [(1996)] Table 2: Common Refrigerant (Jones, W.P. 1996) Table 3: Construction of the Evaporator Table 4: Trouble shooting in domestic refrigerator Table 5: Bill of engineering materials and evaluation ... Continue reading---
LIST OF FIGURES - [ Total Page(s): 1 ]LIST OF FIGUREFigure 1: The Vapor compression refrigeration system Figure 2: Image of refrigeration system Figure3: Pictorial View of a Compressor Figure 4: Pictorial View of a Condenser ... Continue reading---
TABLE OF CONTENTS - [ Total Page(s): 1 ]TABLE OF CONTENTSTitle page Certification Dedication Acknowledgement Abstract Table of content CHAPTER ONE: REFRIGERATION1.0 Introduction 1.1 Aim 1.2 Objectives CHAPTER TWO: 1.1 Literature Review CHAPTER THREEAnalysis of refrigeration system and choice of Project as best 3.0 The cycle operation of 3.1 Types of gas compressor 3.2 Thermodynamic Analysis of Tile System 3.3.1 The Compressor 3.3.2 Tile Condense 3.3.3 The Evaporator ... Continue reading---
CHAPTER ONE - [ Total Page(s): 1 ]CHAPTER ONEREFRIGERATION1.0 INTRODUCTIONThe ice cream being sold at the corner stores, the frozen vegetable for dinner, the refreshing water for drinking at the office, water cooler are all dependent on the science of refrigeration. Refrigeration in its specialized forms in a comparative modern development which has been in practice for generations, and its application in controlling environmental condition has made possible some outer space programs and many other scientific and commerci ... Continue reading---
CHAPTER TWO - [ Total Page(s): 1 ]CHAPTER TWO2.0 LITERATURE REVIEWRefrigeration is branch of engineering that is concerned with the science of producing and maintaining temperature below that of the surrounding atmosphere [Raymond, C.G. (1973)]. It also the process of removing heat from the substance.Before the advent of mechanical refrigeration, water was kept cool by storing in semi-porous pots, so that the water could seep through and evaporate. The evaporation carried away heat and cooled the water [Raymond, C.G. (1 97 ... Continue reading---
CHAPTER THREE - [ Total Page(s): 5 ]3.3.4 CAPILLARY TUBEThis device operate on the principle that a given weight of refrigerant liquid will pass through a capillary more readily than the same weight of gas will do at the same pressure. Immediately the condensed refrigerant enters the capillary tube, the mass flow of this refrigerant will be reduced them by giving more room for cooling time.ADVANTAGE OF THE TYPES OF CAPILLARY TUBE USED FOR THIS PROJECT LIES INa. Its simplicityb. Ease of being welded to the suction for heat exchangi ... Continue reading---
CHAPTER FIVE - [ Total Page(s): 3 ] ... Continue reading---
CHAPTER SIX - [ Total Page(s): 1 ]CHAPTER SIXCONCLUSION AND RECOMMENDATION6.1 CONCLUSION In the designing and fabrication of this project, titled the design and fabrication of domestic refrigerator using mild steel as water resisting cabinet, the design is economic and technological soundness when taking into consideration; the durability and the behavior of the material used under the application were also put into consideration. The principles of thermodynamic were taken into consideration which is the basic princi ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCESAlthouse, A.D Braciand, A.F. and Carl, H. (1968), “Refrigeration and Air Conditioningâ€, first Edition, The Good Heart-will Cox Company Inc., London. Page 17-18.Andrew, D. & Alfred, F.B. (1970), “Modern Refrigerator and Air Conditioningâ€, 3rd Edition, Sunmill Press, New York, pp 256.Croker, H.R. & A.Q. (1993), “Piping Hand Bookâ€, 7th Edition, Green Hill Book Company, New York, pp. 2 1-25.Gunther, C.R. (1973), “Refrigeration, Air-Conditioning and ... Continue reading---
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ABSRACT - [ Total Page(s): 1 ]ABSTRACTThis project is on the design and fabrication of deep freezer for the preservation of items/products and making the items to cool. The project is able to develop a simple efficient economical and environmental friendly refrigeration system (A freezer) towards better technological advancement in Nigeria. This project modifies the existing refrigeration system with the use of R-600a which is ozone friendly, and non-contaminant like previous refrigerant of the hydrofluoric-carbon, HFC and C ... Continue reading---