Description

ABSTRACT

Due to the rotation of the earth in an orbit, direction of the Sun changes relatively. This work covers a setup, which is fabricated to minimize the angle of incidence between incoming light from Sun and a flat photovoltaic (PV) panel to increase the intensity of the light received. It increases the power generated by an installed power generating unit. This setup consists of a mechanical mechanism to tilt the flat PV panel towards the Sun. This mechanism is derived by DC motors having a high reduction ratio. Voltage supplies to these motors are controlled by the four LDR (Light Dependent Registers) sensors by the means of electronic circuits which makes the device to rotate 360⁰. The energy consumed by the tracking system is very less. The cost of the mechanical parts and electronic components are very less. The Microprocessor is not used in this setup. Hence it does not require programming and computer interface. Not any geological data are required, because LDRs work on the differential of the light intensity at the both ends of the plate. The motive of the work is to fabricate a solar tracker at a very low cost.

Keywords: Solar Tracker,LDR,Photovoltaic(PV)cell,Dual Axis,Solar Collectors,Solar power plant

 

 

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

CHAPTER ONE

1.0      INTRODUCTION

1.1      BACKGROUND OF THE PROJECT

• PROBLEM STATEMENT
• AIM AND OBJECTIVES OF THE PROJECT
• SCOPE OF THE PROJECT
• SIGNIFICANCE OF THE PROJECT
• PROJECT ORGANISATION

CHAPTER TWO

LITERATURE REVIEW

• BACKGROUND LITERATURE SURVEY OF THE STUDY
• OVERVIEW OF THE STUDY
• THE ORETICAL FUNDAMENTALS
• COMPONENTS OF SOLAR TRACKING SYSTEMS
• REVIEW OF THE PAST WORK ON SOLAR TRACKING SYSTEM
• SOLAR PANEL MOUNTING

CHAPTER THREE

3.0     CONSTRUCTION METHODOLOGY

3.1      SYSTEM BLOCK DIAGRAM

3.2      MATERIALS USED

3.3      PRINCIPLE OF THE WORK

3.4      CONSTRUCTIONAL DETAIL OF THE SETUP

CHAPTER FOUR

TEST AND RESULT ANALYSIS

• CALIBRATION OF THE SETUP
• TESTING/WORKING OF THE SETUP
• RESULTS

CHAPTER FIVE

• CONCLUSION
• RECOMMENDATION
• REFERENCES

CHAPTER ONE

    1.0                                                INTRODUCTION

   1.1                                   BACKGROUND OF THE STUDY

Energy is required for the different applications in our daily life. There are so many resources of power generation. 85% of power is produced from fossil fuels (Anuraj& Gandhi, 2014). Due to the depletion of the fossil fuel, renewable energy resources are required. Wind energy, geothermal energy, tidal energy and solar energy resources are some of the most efficient renewable energy resources. Solar energy can be converted in to two forms of energy, i.e. thermal energy and electrical energy. These can be achieved by using some instruments. Solar energy can be converted into electrical energy by using PV (photovoltaic) cells. Rays from the Sun light falls on the PV panel, which generates DC power. This DC power has a direct correlation with the intensity of the light incident on panel. And the intensity depends on the angle of incidence between incoming light and a flat photovoltaic(PV)panel.

A tracking system can keep the angle of incidence equal to 0. Sun tracking systems can increase the power output of solar power plants by25%to40%,dependingonthegeographiclocation.Asingleaxistrackercanincreasepoweroutputby26%,while a dual axis tracker increases power by 32%(Deb& Roy, 2012). Single axis trackers follow the Sun from east to west,while dual axis trackers track the Sun by altitude (up/down), since the Sun moves across the sky throughout the day. Mousazadeh et al. (2009)calculated that the amount of power gained by tracking can come close to an ideal57%(Mousazadehetal.,2009).

Tracking systems compose of mechanical mechanism and electronic sensors. Mechanical mechanism rotates the flat panel and this rotation is controlled by electronic sensors.

The controlling process can be classified into two processes, namely passive control unit (Arsalan,2013)andelectro-opticalcontrolunit.Thepassivecontrolunitisasystemconductedwithoutanyelectronicdevice.The electro optical control unit uses solar detecting devices which are sensitive to solar radiance photo sensors(LDR). Third controlling process is used in this work.

1.2                                               PROBLEM STATEMENT

One of the major problems facing solar energy systems is the efficiency as the sun moves on the celestial sphere, and this makes it difficult to achieve higher power output from the solar panel. In other to solve this problem, a solar tracker was built. Solar tracker is a device that tracks the position of the sun and set the solar energy conversion system focusing normal to the sun beams. As ingleax is tracker was first built which was only able to increase power output by 26% due to the fact that it Single axis trackers follow theSun from east towest (Deb& Roy, 2012). This paper presents a design focused on harnessing the maximum available solar radiation using 360⁰ tracking mechanism. The tracking mechanism is designed to focus the solar conversion system perpendicular to the rays of the sun(sun beams) at all time of the day relative to the position ofthesun in the sky dome.

1.3                              AIM AND OBJECTIVES OF THE STUDY

The main aim of this study is to build an intelligent solar tracker which makes the panel to rotate 360⁰ using four (4) light sensors which are positioned to the four corners of the earth to monitor the intensity of the sun from any direction at any point in time to maximize the absorbed solar radiation and minimize the energy consumption for tracking system. The objectives of the work are:

1. To fabricate a solar tracking device with dual actuator, four LDR, inbuilt battery of 10000mAhr which produces output of 220vac and 5vdc.
2. To harness maximum solar energy

• To provide a stableelectric power supply using solar energy.

1.4                                             SCOPE OF THE STUDY

The scope of this work covers building a dual axis solar tracking system using two linear actuator .The driving mechanism for the motion are two direct current linear actuators of 12V each, which one of the actuators tracks the east to west motion of the sun while the second linear actuator tracks the seasonal motion/daily altitude of the sun. The main task of the tracking mechanism is to focus solar energy conversion system perpendicular to the sun which makes the panel to rotate 360⁰ using four (4) light sensors which are positioned to the four corners of the earth to monitor the intensity of the sun from any direction at any point in time to maximize the absorbed solar radiation and minimize the energy consumption for tracking system. A 220Vac is produce from the inbuilt inverter of the system together with a 5vdc USB output. The movement of the sun on the celestial sphere was the bases of the tracking mechanisms angles design.

1.5                                      SIGNIFICANCE OF THE STUDY

To the country, this study will serve as means of ensuring a steady power supply which will help the country (Nigeria) to be able to grow its economy, and attain its Millennium Development Goals(MDGs).

To the student, this study will help the student involved becoming familiar with solar energy generation and also help him to understand how he can increase the power of solar energy by electromechanical means.

1.6                                         METHODOLOGY

To achieve the aim and objectives of this work, the following are the steps involved:

1. Study of the previous work on the project so as to improve it efficiency.
2. Draw a block diagram.

• Test for continuity of components and devices such as Input Light Sensors(LDR),

1. Design of the device was carried out (such as the control circuit and the tracking mechanism.
2. Construction of the circuit was carried out. The construction of this project includes the placing of components on Vero boards, soldering and connection of other electronics components and mechanical devices,
3. Finally, the whole device was cased and final test was carried out

 

CHAPTER FIVE

5.1                                                                          CONCLUSIONS AND FUTURE SCOPE

The use of this technique can capture large amount of solar energy. By using this setup, the use of the non-conventional energywill increase, which is very fruitful incident of our future power sector. It is the main contribution that once the simplicity of solar energy system design is understood, engineers and manufactures will provide new system designs that will expand the solar market worldwide. Dust particles present in the atmosphere in a large quantity. They cover the panel. This becomes an interruptionin the direct contact between Sun light and PV cells. It may decrease the efficiency of the solar power plant. Hence an automatic system can be designed and fabricated for the cleaning of the panel. It may be like a wiper of the car.