Design And Construction Of Automatic Solar Street Light

Design And Construction Of Automatic Solar Street Light

Abstract

In this project work, we are mostly concern about building a simple power streetlight which is automatically operated. There are four main components required to build a solar operated streetlight. The solar array, High efficiency D.C lamp section made by transistor, resistors, and the sensor LDR, changes controller which is made up of diode, resistors, LED, capacitor, and a battery of which the solar array is the most expensive. It is the solar array that produced a D.C voltage due to the energy received from the sun during the day , thereby making the battery to charge, as a result, keeping the streetlight into operation when it get dark. The basic circuitry on solar powered streetlight is the solar charge controller which essentially consists of an automatic battery charger, fed by the solar panel and a lighting controller, automated for dust to dawn operation. This street light jus designed to operate or trigger automatically at night.

Table of Content

• Title page
• Certification
• Abstract
• Dedication
• Acknowledgement
• List of keywords and abbreviation
• Table of content

Chapter One

1.0 Introduction

• 1.1 Aims and objectives of the study
• 1.2 Scope of the study
• 1.3 Limitation of the study
• 1.4 Significance of the study
• 1.5 Methodology
• 1.6 Limitation of the study

Chapter Two

2.0 Literature Review

• 2.1 Theoretical background
• 2.2 List of components used in solar street lighting
• 2.3 Merit and demerit of solar energy
• 2.4 Selection of right components

Chapter Three

3.0 Methodology (Design and Construction)

• 3.1 Solar lighting basics and block diagram
• 3.2 Circuit connection and mode of operation
• 3.3 Benefits derived from solar street light
• 3.4 How solar power works.

Chapter Four

4.0 Results and Discussion

• 4.1 Tests carried out
• 4.2 Problems encountered and solutions
• 4.3 Cost Analysis
• 5.1 Bill of engineering measurement and evaluation (BEME)

Chapter Five

5.0 Conclusion and Recommendation

• 5.1 Conclusion
• 5.2 Recommendation
• References

Chapter One

1.0 Introduction

The importance of light to every mankind cannot be over emphasized, even when the earth was created; the earth was illuminated with light which makes it a place of living. This means, without light, the whole world is in darkness and as a result of this, living things be it plants, animals or human beings cannot exist.

When talking about lighting, it comes from two different sources, which could be natural or electrical. The former comes from the Creator (God) while the latter is a result of our natural resources being utilized effectively by human beings. Since there is need for lighting, electric energy generation is employed to solve the problems people are facing during the day, especially at night when there is total darkness everywhere.

Since the invention of electrical energy for lighting, it is quite obvious that it requires human intervention to control the switch either off when not in use or ONM when the need arises. Due to this factor and poor supply of electricity, we have been able to find and alternative way of generating electricity for the purpose of illumination which is highly efficient and effective through the energy from the sun known as solar energy.

This involves the use of a module called solar panel, which receive the energy from the sun and convert it to electricity.

Basically, this project focused on the design and construction of a solar operated automatic streetlight. This is a commercial quality light that can easily illuminate the streets and other areas of choice giving the potential of many years of trustworthy use with a minimum of maintenance required.

The four major components needed to build construct a solar powered streetlight are: The solar panel, high efficiency d.c. Temperature, charge controller and a battery.

The solar panel has its major task to convert the sun’s energy into electricity, precisely D.C voltage. The basic circuitry on solar powered streetlights consists essentially of a automatic battery charger, fed by the solar panel and a lighting controller automated for dusk to down operation.

The charge controller projects the battery from over-charging, maximizes the charging voltage and current output of the solar panel.

To achieve the automatic operation of the streetlight, a photocell or a time, which senses the period of darkness and lightness, is used to trigger.

The type of battery employed here is a maintenance free one, which is capable of supplying few days of back up power in case of bad weather or charger failure. Also the lamp used in this project work is a D.C operated lamp.

1.1 Background of the Study

This project is carried out so as to provide an alternative means of generating electricity through sunlight for lighting purpose.

Also, the effective utilization of natural resources (sunlight) is ensured by the design of this project.

The components required in carrying out this project which are solar panel, battery charge controller, which contains the resistors, capacitors, led and diode, bulb are efficient enough to yield the desired result without the use of power converter.

Therefore, the use of Direct Current (D.C) operated lamp are employed, specifically, LEDs (Light Emitting Diodes).

1.2 Aims and Objectives

The aims and objectives of this project are:

1. To power up a street lighting system through solar energy.
2. To protect the solar battery from quick deterioration as a result of continuous day and night working.
3. To control a solar powered streetlight automatically.
4. To utilize the naturally endowed resource (sun).

1.3 Scope of the Study

This project design is centered on solar energy as fast growing technology for street lighting with the use of a solar module. The automatic control process of the light can be achieved by a photocell. Or a LDR (Light Depending Resistor) which eliminates human intervention for manual switching or control/

1.4 Significance of the Study

The significance of the design and construction of solar operated Automatic Street light cannot be overemphasized in the sense that it is financially viable particularly in areas where the cost of providing a main supply is prohibitive. It has the capability of illuminating large surface area of land due to high efficiency of the lamp used. Also, it does not require human intervention to control its operation and finally, power outages have no impact whatsoever on it.

1.5 Methodology

In the process of searching for information on this project, relevant textbooks, journals and related past project reports in the library were consulted. Also, several visits to relevant web sites on the Internet cannot be overloaded.

1.6 Limitation of the Study

Every project’s have its limitation. The major limitation of this project is that sunlight used to generate the electricity is not readily available especially at winter period.

As a result, the streetlight requires the need for a large battery to use in order to provide at least three days of stand by operation during cloudy weather without discharging the battery below its safe operating limit.

Chapter Five

5.0 Conclusion and Recommendation

5.1 Conclusion

Solar street lights require little or no maintenance, as most solar lights have detectors that can differentiate between light and dark. That means, no labour is required to turn them ON and OFF.

The light switches ON at dusk and turn OFF at dawn. Of course, the photovoltaic cells on each unit collect sun’s energy as long as there is any light at all. The basic rule is that, there is visibility.

In a nutshell, solar powered street light is a very good example of what can be done with a solar energy. A growing number of solar street lighting projects are running in Africa, Asia and the Middle East. This concept is straight forward and more countries are migrating into it, being a cost-effective, cost saving and reliable invention.

5.2 Recommendation

For estimation purposes, it is recommended using a 30-watt solar array and 40 amp-hour capacity batteries to power a 10-watt lamp, 8 hour per night. Also, one can use a 40-watt solar array and 50 amp-hour batteries to power a 13-watt lighting load; you will need an 80 amp-hour or larger battery and at least two 50-watt solar panels.
These values will provide at least. Three days of stand-by operation during cloudy weather without discharging the battery below its safe operating limit. Remember, repeated discharging of any battery below a 50% discharge level will significantly reduce battery life.

It is also strongly recommended to buy a good quality gell-cell battery designed for daily deep discharge cycling. In addition, since the endorser must be vented for safety in case of battery out-gassing the battery life will be reduced due to the high and low outdoor temperature it will experience.

Finally, Nigeria is worth of the equator; hence, the solar panel should be oriented south or at worst, southwest to maximize performance. And to prevent shade on the solar panel, the trees and bushes must be trimmed and wash panels as needed to keep off dust, dirties and birds.

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