REPAIR AND REHABILITATION OF A ROOM AIR-CONDITIONER IN MECHANICAL ENGINEERING DEPARTMENT
By
OZONGWU DONATUR C. ME/N2003/165
Presented To
Department of Mechanical Engineering
PREFACE
A new machine/equipment will provide satisfactory service, if kept in proper operating condition. The inevitability of less than 100% reliability of way machine/equipment after some period of operation ultimately necessitates its repair and maintenance.
Also in system of any complexity, certain replacement/adjustment are necessary at various stages. Thus vital consideration in the design of the components and equipment of a system in the question of how quickly and easily a unit in that system can be adjusted or repair.
Repair or rehabilitation simply means to restore to good condition, make over in a newform or to renovate. The repair and rehabilitation of a machine in the mechanical Engineering department of this institute is of utmost importance considering the number of machine that are less or now functional. Its quite unlike yester yeas when it was an easy task to recommend newly produced machine.
The habit of replacement of faulty machines with new one rather than repairing them should be discouraged. The ownership of these machine/ equipment should be a never ending source of satisfaction and pleasure and so, effort should be made to reactivate them.
Historically/rehabilitation of machine or equipment has tended to be an emerging service performed in an ad-hoc faction largely concerned with getting broken-down machine back into service as soon as possible. These should not be done thoroughly and perfectly. Unfortunately the climate in West Africa causes rapid determination in all metal object sensitive to high ambient temperature machines and tools are no exception.
TABLE OF CONTENT
Title page
Letter of Transmittal
Release page
Preface
Acknowledgment
Dedication
Plant description
Table of Content
Chapter one
1.0 Introduction
1.1 Air conditioner
1.2 Development of air conditioner
1.3 Aims and objective of this project
1.4 Basic control cycle system
1.5 Compressor crankase heater
1.6 Some of the other basic cycle control system
Chapter Two
2.0 Principle of air conditioner
2.1 Reverse carnot cycle principle
2.2 Flow Diagram of a refrigeration cycle
2.3 Working principle
2.4 Components arrangement of an air conditioner and diagram
2.5 Mode of operation of air conditioner plant
2.6 Compression cycle operation
2.7 Air conditioner components and their functions.
Chapter Three
3.0 Maintenance
3.1 Types of maintenance
3.2 Repair of damaged room air conditioner
3.3 Maintenance job carried out on the air conditioner
3.4 Causes of air-conditioner breakdown
3.5 Effect of air conditioner breakdown
3.6 Cares for domestic air conditioner
Chapter Four
4.0 System failure
4.1 Primary causes of system failure
4.2 Test Sequences
4.3 Instrument used in testing air conditioner
4.4 Tools used in servicing air conditioner and refrigeration and their functions.
4.5 Air conditioner components faults and remedies.
Chapter Five
5.0 Recommendation
5.1 Maintenance work
5.2 Project problem
5.3 Cost of project and repair
5.4 Conclusion
References
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