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Fabrication On Domestic Refrigerator
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CHAPTER FOUR
DESCRIPTION OF COMPONENT PARTS AND WORKING PRINCIPLE
The description of the component parts used in this project is analyzed in this chapter. This is done in order to understand the function of each component in the refrigeration system.
4.1 THE COMPRESSOR
The compressor is often called the heat of any refrigeration system, the purpose of the compressor in the vapour compression refrigeration system is to accept the low pressure dry gas, low comparative refrigerant into its cylinder and compress it to high pressure, high temperature gas and to discharged the refrigerant in the state into condenser through the discharged value Whiteman, (2005).
It is very high important in vapour compression refrigerant as it enable the spent vapour from the evaporator to be used recapturing it and ronci1ng basis which it can be liquefied for reuse.
Compressor Efficiency
Compressor efficiency is measured in term of Is volume of gas it pumps in a single cylinder.
Volumetric efficiency (volume of gas pumped for stroke)/(volume of compressor cylinder)
Factor that affect the Volumetric Efficiency of Compressor
High side pressure
ii. Low side pressure
iii. Clearance pocket
High Side Pressure: High side pressure makes the compressor pump again a greater force and therefore reduce the amount of vapour pumped by compressor on each stroke. Capacity of the compressor is a function of the speed and volume of the cylinder replacement.
Since the volume is normally fixed (i.e. either I 750 or 3500 rpm), the eight of’ refrigerant pump becomes a mechanical ration of stroke per minute times the cylinder volume Whiteman, (2005).
This type of compressor whereby an increase in pressure is accomplished in a single step is called single stage compressor.
Reciprocating is widely in refrigeration system for the f refrigerant gases. They are various size ranging from small cylinder unit to large multi cylinder installation capable of compression thousandof cubic feet refrigerant gas per minute.
Reciprocating compressors are only type suitable for compressing air and gases to extremely pressure William (2005)
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ABSRACT - [ Total Page(s): 1 ]ABSTRACTThis paper describes the quick and precise control method for domestic refrigerator. The propose controller is based on the fuzzy logic and neutral network designed maintaining the constant inner temperature (of the refrigerator and improving the refrigerator efficiency. The fuzzy logic controller is used to maintain the inner temperature inspite of the environment variation such as outer temperature change of the volume change of the stored food to the refrigerator a neutral network is ... Continue reading---
TABLE OF CONTENTS - [ Total Page(s): 1 ]TABLE OF CONTENTSTile Page Certification Dedication Acknowledgement Abstract Table of Contents CHAPTER ONE: INTRODUCTION1.1 Refrigeration System 1.2 Aim and Objective 1.3 The Need of Refrigerator CHAPTER TWO2.1 Literature Review 2.2 The Air Refrigeration System 2.3 Vapour Absorption Refrigeration System 2.4 Principle of Operation Absorption Refrigeration System 2.5 The Vapour Compression Refrigerator System 2.6 ... Continue reading---
CHAPTER ONE - [ Total Page(s): 2 ]As a result, we are not limited to the engagement of fruits vegetables and other product growth locally at any given time of the year, but we can have food product from the distance lands an4 other part of the country. Economic Growth: refrigeration has helped the economy of many areas by providing a means preserving their product enrooted to remote area for consumers.Hospital: Refrigerators are used in the hospitals for the preservation of bone, blood tissue and some drugs that are to be kept u ... Continue reading---
CHAPTER TWO - [ Total Page(s): 2 ]CHAPTER TWO2.1 LITERATURE REVIEWRefrigeration is the branch of engineering that is concern with the producing and maintaining temperature below that of the surrounding atmosphere .this implies the development of temperature differential rather than the establishment of a given temperature level. The act was known to the ancient Egyptians and the people of Indian, who use evaporation to cool liquid in porous earthen jar exposed to dry night air, and to the early Chinese, Greeks and Romans w ... Continue reading---
CHAPTER THREE - [ Total Page(s): 3 ]CHAPTER THREEDESIGN CALCULATIONS FOR REFRIGERATION SYSTEMHaving described the component parts of the refrigerator in thes necessary to design the system according to the requirement of the project.The system consists of the following component parts: Compressor Condenser Capillary tube Evaporator Piping (discharge and suction line). Insulation cabinel body3.1 REFRIGERANT SELECTIONThe choice of a refrigerant must be made and the proper refrige ... Continue reading---
CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVECONCLUSION AND RECOMMENDATION5.1 CONCLUSIONRefrigeration is the science of producing and maintaining a temperature below that of the surrounding atmosphere i.e it is an act of removing heat from a substance to be cooled.This project work was a direct integration of both the theoretical acknowledge and practical skills required in the course of study, and has the acquainted the relevance of engineering science to technological growth and development.The project was based on the ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCESCoiling and William e. Worthington, (2005): “Refrigeration Systemâ€, New York.Collin Hempstead and William E., Worth Ton, (2005): Encyclopedia of 20thCentury Technology, Volume 2, London.Guy, (1984): “Hand Book Of Product And Directing†(Equipment Of Volume) Mc Grew Hill Company, New York.Marsh,& Olive, (1970): “Principle Of Refrigeration†2nd Edition, Demur Publishers, Albany, New York. McGraw-Hill 1998,Refrigeration.Nicolas Leonard Sad Carnal, (1824 ... Continue reading---
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ABSRACT - [ Total Page(s): 1 ]ABSTRACTThis paper describes the quick and precise control method for domestic refrigerator. The propose controller is based on the fuzzy logic and neutral network designed maintaining the constant inner temperature (of the refrigerator and improving the refrigerator efficiency. The fuzzy logic controller is used to maintain the inner temperature inspite of the environment variation such as outer temperature change of the volume change of the stored food to the refrigerator a neutral network is ... Continue reading---