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Design, Production, And Testing Of A Rotary Compressor

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The main aim of this research is to produce, test and calculate the design of the rotary compressor. This compressor is a group of positive displacement machines that has a central, spinning roller and a blade. Compression mechanisms are the most important parts of the rotary compressor components. Detail design calculation of rotary compressor is described in this research. The compressor in this paper used refrigerant R-410A. The compressor work done from calculation is 630 Watts and cylinder and roller diameter is 43 mm and 36 mm respectively. The compressor motor is 777Watts. The motor with 3000 rpm, 220 volt and a frequency of 50 Hertz is used. Volumetric efficiency is 146.29%. Coefficient of performance is 3.5. The design is based on refrigeration load 2240 Watts.

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

CHAPTER ONE

INTRODUCTION

1.1Â Â Â Â Â BACKGROUND OF THE PROJECT

AIM/OBJECTIVE OF THE PROJECT
PROBLEM STATEMENT
SCOPE AND LIMITATION OF THE PROJECT
APPLICATION OF ROTARY COMPRESSOR

CHAPTER TWO

LITERATURE REVIEW

OVERVIEW OF A REFRIGERATION COMPRESSOR
TYPES OF REFRIGERATION AND AIR CONDITIONING COMPRESSORS
DIFFERENCE BETWEEN ROTARY AND RECIPROCATING COMPRESSOR
TYPE SELECTION CRITERIA
HISTORICAL BACKGROUND OF THE STUDY

CHAPTER THREE

METHODOLOGY

ROTARY COMPRESSOR WORKING PRINCIPAL
OIL VS. NON-OIL ROTARY COMPRESSORS
BENEFITS OF ROTARY COMPRESSORS
ROTARY COMPRESSOR COMPONENTS
SPECIFICATION DATA
APPLICATION OF ROTARY COMPRESSOR
BACKGROUD DESIGN

CHAPTER FOUR

RESULT ANALYSIS

TEST THE SWEPT VOLUME OF ROTARY COMPRESSOR
POWER AND MOTOR DESIGN
CALCULATION RESULT OF ROTARYCOMPRESSOR
NUMERICAL ANALYSIS OF COMPRESSION MECHANISMS

CHAPTER FIVE

CONCLUSION AND RECOMMENDATION
REFERENCES

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CHAPTER ONE

1.0Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â INTRODUCTION

1.1Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â BACKGROUND OF THE STUDY

Compressor is a mechanical device to compress and pump the refrigerant vapour from a low-pressure region to a high- pressure region. Refrigerating compressor is a heart of refrigeration system. It also provides the primary force to circulate the refrigerant through the cycle [1]. Rotary compressor is a machine which compresses the gas as a result of the angular movement of the vane or roller. Rotary compressors have certain advantages such as continuously flow process, high speed of rotation and the design can be scaled down to vary small dimension. The design of this compressor does not require suction valve and installation of discharge valve is optional [4]. The rotary compressors are divided into four types; rotary sliding vane compressor, scroll compressors, screw compressor and rolling piston rotary compressor [2]. The rolling piston rotary compressor can be divided into four compartments, which are the accumulator, the oil sump, compression mechanism and discharge compartment. The compression mechanisms are important to produce the power in the compressor. The compression mechanisms are a roller, a blade and a cylinder. In this research, the design of the compression chamber of a rolling piston rotary compressor is calculated. And the flow in the compression chamber is shown by using software.

1.2Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â AIM AND OBJECTIVES OF THE PROJECT

The purpose of this research is produce, testing and to calculate the design of the rotary compressor. Objective of this work is to:

Build and test this device
Discuss different types of rotary compressor

Calculate the coefficient of performance, refrigerating capacity, motor input power, friction power, compressor overall size

1.3Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â PROBLEM STATEMENT

Rotary compressor was invented to solve most of the obvious problem seen in other types of compressors such as big and heaviness, vibration and shaking during operation, low speed and noisy. Rotary compressor is compact and light. It does not exhibit vibration and shaking forces as that of the reciprocating compressor. So it does not require a rigorous foundation. It operates at high speed, so it can handle a large quantity of fluid. Machine parts are well balanced and less noisy.

1.4Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â SCOPE AND LIMITATION OF THE PROJECT

The compressor was built with motor of 777Watts. And the motor runs at the speed of 3000 rpm, 220 volt as the supply voltage and a frequency of 50 Hertz is used.

Rotary compressor discharge pressure per stage is low compared to the reciprocating compressor. And there is no flexibility in capacity and compression ratio.

1.5Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â APPLICATIONS OF ROTARY COMPRESSOR

The rotary compressor is generally used where a large volume of high-pressure fluid is required. For large industrial applications, high power air tools like jackhammers and impact wrenches, pneumatic pumps, sandblasting operations. It is used where continuous fluid flow is required, such as automated manufacturing, food packaging plants.