17-07-2012, 12:55 PM
IMPROVEMENT OF EFFICIENCY FOR SOLAR PHOTOVOLTAIC CELL APPLICATION
[attachment=27808]
INTRODUCTION
With the alarming rate of depletion of the major energy resources
worldwide, it has become an urgent necessity to seek for renewable energy
resources that will power the future. According to the worldwide market
economy, the increasing demand for energy had forced to put a huge price
tag on natural combustible sources of energies [1]. In fact, it has been
predicted that in the near future the demand of energy will grow in such a rate
that it will be completely impossible to find out or meet the demand with the
resources that we had been using for so long, such as – oil, gas, coal, etc.
This issue throws a positive challenge to the scientific community as more
and more funds are being allocated for the research and development of new
alternatives.
Motivation
With all the above information, the rapid depletion of the natural
resources of the world, we would soon meet a great demand for alternative
source of energy. In the very near future, experts are predicting that we will be
bound to move to renewable sources of energy, solar being one of them.
As long as our earth exists, the sun is there to give us unlimited solar
energy. It is completely up to us how we are going to utilize this abandoned
energy. Every hour, sun gives the same amount of energy to the world that
the whole world uses in an entire year [5].
SOLAR TRACKER
Despite the unlimited solar energy, harvesting it is a challenged mainly
because of the inefficiency of the panels. Recent works shows that different
types of methodology have been proposed to improve the efficiency of solar
panels [6]-[9].
Most of the panel installations that are done in our country are all fixed
arrays. As the day passes, the sun moves away from the facing position of the
panel and thus the power output of the panel decreases. The easiest way to
overcome this problem is to adapt a moveable solar panel using sun tracking
mechanism. We have adopted this system to improve the efficiency for
photovoltaic cell applications.
What is solar tracker?
A solar tracker is a device for orienting solar photovoltaic panel towards
the sun. The sun’s position in the sky varies both with season and time of day
as the sun moves across the sky. Solar powered equipment works best when
pointed at or near the sun, so the solar tracker can increase the effectiveness
of such equipment over any fixed position, at the cost of additional system
complexity.
Motivation
All the solar arrays that are currently being installed in our countries are
fixed on the rooftop or any favorable open space at approximately
inclination with the surface. We went to BRAC Solar project and get to know
that all the BRAC Solar Home System (SHS) are arranged in such a way that
the battery will be charged within 5 hours in a day and at night, the people can
use the battery to run home appliances accordingly.
Horizontal axle solar tracker
In this type of tracking system a long horizontal tube is supported on
bearing mounted upon the tube and the tube will rotate on the axis to track the
apparent motion of the sun through the day. As they do not tilt towards the
equator so therefore they are not that much effective in during the winter
midday (unless located near the equator), but these tracking system are very
much productive in during the spring and summer season when the solar path
is high in the sky.
[attachment=27808]
INTRODUCTION
With the alarming rate of depletion of the major energy resources
worldwide, it has become an urgent necessity to seek for renewable energy
resources that will power the future. According to the worldwide market
economy, the increasing demand for energy had forced to put a huge price
tag on natural combustible sources of energies [1]. In fact, it has been
predicted that in the near future the demand of energy will grow in such a rate
that it will be completely impossible to find out or meet the demand with the
resources that we had been using for so long, such as – oil, gas, coal, etc.
This issue throws a positive challenge to the scientific community as more
and more funds are being allocated for the research and development of new
alternatives.
Motivation
With all the above information, the rapid depletion of the natural
resources of the world, we would soon meet a great demand for alternative
source of energy. In the very near future, experts are predicting that we will be
bound to move to renewable sources of energy, solar being one of them.
As long as our earth exists, the sun is there to give us unlimited solar
energy. It is completely up to us how we are going to utilize this abandoned
energy. Every hour, sun gives the same amount of energy to the world that
the whole world uses in an entire year [5].
SOLAR TRACKER
Despite the unlimited solar energy, harvesting it is a challenged mainly
because of the inefficiency of the panels. Recent works shows that different
types of methodology have been proposed to improve the efficiency of solar
panels [6]-[9].
Most of the panel installations that are done in our country are all fixed
arrays. As the day passes, the sun moves away from the facing position of the
panel and thus the power output of the panel decreases. The easiest way to
overcome this problem is to adapt a moveable solar panel using sun tracking
mechanism. We have adopted this system to improve the efficiency for
photovoltaic cell applications.
What is solar tracker?
A solar tracker is a device for orienting solar photovoltaic panel towards
the sun. The sun’s position in the sky varies both with season and time of day
as the sun moves across the sky. Solar powered equipment works best when
pointed at or near the sun, so the solar tracker can increase the effectiveness
of such equipment over any fixed position, at the cost of additional system
complexity.
Motivation
All the solar arrays that are currently being installed in our countries are
fixed on the rooftop or any favorable open space at approximately
inclination with the surface. We went to BRAC Solar project and get to know
that all the BRAC Solar Home System (SHS) are arranged in such a way that
the battery will be charged within 5 hours in a day and at night, the people can
use the battery to run home appliances accordingly.
Horizontal axle solar tracker
In this type of tracking system a long horizontal tube is supported on
bearing mounted upon the tube and the tube will rotate on the axis to track the
apparent motion of the sun through the day. As they do not tilt towards the
equator so therefore they are not that much effective in during the winter
midday (unless located near the equator), but these tracking system are very
much productive in during the spring and summer season when the solar path
is high in the sky.