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BY

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SCHOOL OF ---
INSTITUTE OF ---

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APPROVAL PAGE

This is to certify that the research work, "design and construction of a 1kw solar stand alone system" by ---, Reg. No. --/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on --- has been approved.

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DEDICATION
This project is dedicated to Almighty God for his protection, kindness, strength over my life throughout the period and also to my --- for his financial support and moral care towards me.Also to my mentor --- for her academic advice she often gives to me. May Almighty God shield them from the peril of this world and bless their entire endeavour Amen.

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ACKNOWLEDGEMENT

The successful completion of this project work could not have been a reality without the encouragement of my --- and other people. My immensely appreciation goes to my humble and able supervisor mr. --- for his kindness in supervising this project.
My warmest gratitude goes to my parents for their moral, spiritual and financial support throughout my study in this institution.
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Stand-Alone PV System (SAPVS) supply an alternative means of electrification in urban landscapes that are not connected to power utility grid and that have a high flow of visitors. People are constantly using their mobile devices and in open spaces, it is difficult to get access to a battery charging station. This paper shows the design and construction of un SAPVS for charging mobile devices in urban landscapes, based on calculations of consumption of mobile devices and portable equipment and technical variables such as intensity of solar radiation, capacity of panels and batteries. SAPVS utilize solar photovoltaic power as renewable energy source and has photovoltaic solar panels of flexible technology that allow to supply the energy of the lighting system, the control system and the charging system and have socket for connecting other devices.  

TABLE OF CONTENT
COVER PAGE                              
APPROVAL PAGE
DEDICATION
ACKNOWLEDGEMENT
TABLE OF CONTENT

1. INTRODUCTION
2. SYSTEM DESCRIPTION
3. AIM
4. OBJECTIVES
5. SIGNIFICANT STUDY
6. DEFINITION OF TERMS

CHAPTER TWO
2.0   LITERATURE REVIEW
2.1   PHOTOVOLTAIC SOLAR SYSTEM
2.2   DIFFERENT TYPES OF SOLAR CELLS
2.3   PHOTOVOLTAIC SOLAR GENERATOR

CHAPTER THREE
METHODOLOGY
3.0   PHOTOVOLTAIC SYSTEM SIZING
3.1   FACTORS AFFECTING PHOTOVOLTAIC SYSTEM SIZING
3.2   SIZING OF THE SOLAR ENERGY
3.3   SIZING OF THE BATTERY
3.4   SIZING OF THE VOLTAGE REGULATOR
3.5   SIZING OF THE INVERTER

CHAPTER FOUR
4.0   CASE STUDY: AN OFFICE IN PURE AND APPLIED PHYSICS DEPARTMENT, LAUTECH, OGBOMOSO.
4.1   GEOGRAPHY LOCATION
4.2   OFFICE APPLIANCES
4.3 SIZING THE SOLAR ENERGY
4.4   SIZING OF THE BATTERY BANK
4.5   DISCHARGE DURATION
4.6   SIZING OF THE SYSTEM WIRING
4.7 SYSTEM COMPONENTS SUMMARY
4.8   PRECAUTION
4.9   MAINTANANCE
CHAPTER FIVE
5.1    CONCLUSION
5.2    RECOMMENDATION
REFERENCES

 

CHAPTER ONE

1.0    INTRODUCTION
          The sun provides the energy to sustain life in our solar system. In one year, the earth receives enough energy from the sun to meet its energy needs for nearly a year. Photovoltaic is the direct conversion of sunlight to electricity, it is a beautiful alternative source of energy to conventional sources of electricity for many reasons it is safe, silent, non – polluting, renewable, highly modular in that their capacity can be increased incrementally to match with gradual load growth, it is reliable with minimal failure rates and projected service lifetimes of about 20 to 30 years. It requires no special training to operate, it contains no moving parts, it is extremely reliable and it’s virtually maintenance free, and can be installed almost anywhere.
A photovoltaic system is a complete set of interconnected components for converting sunlight into electricity by photovoltaic process including array, balance of system and load. The intensity of sunlight that reaches the earth varies with time of the day, season, location and the weather condition, the total energy on a daily or annual basis is called Irradiation and indicates the straight of sunshine. Irradiation is expressed in Whm – 2 per day or KWh.m-2 per day. Different geographical regions experience different weather patterns, so the site we live is a major factor that affects the photovoltaic system design, the orientation of the panels, finding the number of days of autonomy where the sun does not shine in the sky and choosing the best tilt angle of the solar panels.
Photovoltaic panels collect more energy, if they are installed on a tracker that follows the movement of the sun although it is an expensive process; for this process they are usually fixed in a particular position with an angle called the tilt angle B. This angle varies according to seasonal variation, for instance, in summer the solar panel must be more horizontal while in the winter, it is placed at a steeper angle.
In this project, the various components of a photovoltaic system and factors affecting its design for the purpose of domestic use is explained. Then a residence model with medium energy requirements in any of the residential apartment is taken as a study case. The design procedures of the photovoltaic system will be provided in ascending manner.
1.1     SYSTEM DESCRIPTION
1.11   Components
Photovoltaic system is considered of a variety of equipment in addition to the photovoltaic array, a balance of system that wired together to form the entire fully functional system capable of supplying electric power and these components are:

1. Photovoltaic Cells: Represent the fundamental power conversion units, they are made from semi – conductor materials and convert sunlight energy to electricity. Individual photovoltaic cells are usually quite small, producing around 1 to 2 watt of power. To increase the power output of a photovoltaic cells, they have to be connected together to form modules, modules are connected in parallel and series to form larger parts/units called Panels and Arrays to produce electric power that meets any electric need.

Solar panel.

1. A storage Medium: Battery bank which is involved in the system to make the energy available at night or at days of autonomy (sometimes called dark days) when the sun is not providing enough radiation the standard batteries that are used in solar system are lead – acid batteries because of their high performance; long life and cost effectiveness.

battery

1. A Voltage Regulator or Charge Controller: Is an essential part of nearly all power system that change batteries, the basic function of a controller is to block reverse current and prevent battery from getting overcharged. Some controllers also prevent battery over discharging, electrical overload, display battery status and the flow of power.

Solar regulator

1. An Inverter: Is device that changes a low d.c voltage to usable a.c voltage. It is one of the solar energy. Systems main element is the solar panel generate d.c voltage. Inverters are different by the output wave format, output power and installation type. It is also called power conditioner because it changes the form of the electric power. There are two types of output wave format: Modified Sine wave (MSW) and Pure Sine wave (PSW). The MSW inverters are economical and efficient, while the pure sine wave inverters are now sophisticated with high end performance and can operate virtually any type of load. There are two types of inverters that can be installed, the stand alone installation and grid connection installation.

Inverter.

1. Balance of System such as protection devices that keep the system components safe during their operation including blocking diodes that protect the components from getting damaged by the flow back of electricity from the battery at night. Bypass diodes that are connected across several cells to limit the power dissipated in shaded cells by providing a low resistance path for the module current and lightning protection that includes devices to protect the sensitive electronic components from the high voltage transient and ground faults. Wiring is a mean, through which the components of a solar energy system are connected together; correct wire needs to be used to ensure low loss of energy and to prevent overheating and possible damage or even fire. Using correct wire size and types of wire will enhance the performance and reliability of the photovoltaic system. The size of the wire must be large enough to carry the maximum current expected without undue voltage loss.
2. A.C and D.C Loads: Are the appliances (such as lights and radio e.t.c) and the components (such as fridges, water pumps, washing machines e.t.c) which consume the power generated by the photovoltaic array.

1.12  CONFIGURATION
          The photovoltaic system has been classified according to how the system components are connected to other power sources such as stand alone (SA) and utility – interactive (UI) system. In a stand alone system, the system is designed to operate independent of the electric utility grid, and is generally designed and sized to supply certain d.c/a.c electrical loads. A bank of battery is used to store the energy in a form of d.c power that is produced by photovoltaic modules to be used at nights. The d.c output of the batteries can be used immediately to run certain low d.c voltage loads such as lighting bulbs or refrigerators or can be converted to a.c voltage to run a.c loads which constitute of most of the appliances.

1.2    AIM
The aim of this project is to install a 1KVA stand – alone photovoltaic system, using any residential apartment as a case study.
1.3    Objectives

1. To generate electricity from solar energy in which the source is free in nature and abundant.
2. To find solution to irregularity in power supply by PHCN
3. To carry out the system sizing in solar power generator.
4. To study the performance of each component constituting the solar power generator.

1.4    Significant Study
In respect to failure of power supply and perpetual increase in fuel price to run power and most times fuel scarcity, there is need to introduce the use of solar energy power system towards a stable power supply for developing and developed nations of the world.
1.5    Definition of Terms
SUN – Source of energy
SOLAR PANEL – It’s device that converts light energy to electrical energy
SOLAR REGULATOR – It’s a device that regulates from 40VDC to 28VDC
BATTERY – It’s a device that serves as reservoirs/storage device
INVERTER – It’s a device that converts D.C (12v) [Battery/Solar] 28VDC to   AC 220AC.
LOAD – AC output using devices (laptop, Bulb, Ceiling fan, Handset                                             Charger)
POWER – Voltage × Current
WATTAGE – Power factor [0.8] × Power i.e. power (VA)
SOLAR CELLS – Is the smallest semiconductor (silicon) device that converts                                                 solar energy (sunlight) to electrical energy (DC)
ARRAY – Is the combination of panel in series or parallel
PANEL/MODULES – Is the combination of cell in series or parallel.
SHORT CIRCUIT – It has low resistance or no resistance and potential                                                                      differences of zero.
CLOSED CIRCUIT – The current is generated across the load.
OPEN CIRCUIT – It has no current to generate across the with high                                                                resistances

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CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "design and construction of a 1kw solar stand alone system" is also available. Order full work to download. Chapter two of "design and construction of a 1kw solar stand alone system" consists of the literature review. In this chapter all the related work on "design and construction of a 1kw solar stand alone system" was reviewed.

CHAPTER THREE: The complete chapter three of "design and construction of a 1kw solar stand alone system" is available. Order full work to download. Chapter three of "design and construction of a 1kw solar stand alone system" consists of the methodology. In this chapter all the method used in carrying out this work was discussed.

CHAPTER FOUR: The complete chapter four of "design and construction of a 1kw solar stand alone system" is available. Order full work to download. Chapter four of "design and construction of a 1kw solar stand alone system" consists of all the test conducted during the work and the result gotten after the whole work

CHAPTER FIVE: The complete chapter five of "design and construction of a 1kw solar stand alone system" is available. Order full work to download. Chapter five of "design and construction of a 1kw solar stand alone system" consist of conclusion, recommendation and references.

 

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