27-11-2012, 03:43 PM
Low Cost Automatic Solar Energy Trapping System
Low Cost Automatic Solar.ppt (Size: 5.71 MB / Downloads: 195)
Introduction
Solar energy is a renewable energy source.
Renewable energy source is the energy obtained from regenerative or virtually inexhaustible sources of energy occurring in the natural environment like solar energy.
In recent years, the need for energy will increase manyfold
To meet this growing demand for energy,
harnessing of non-conventional renewable energy becomes a necessity.
Solar energy is the most abundant and uniformly
distributed from among all the available non-conventional sources.
SOLAR TRACKING SYSTEM.
In the existing system maximum energy from the sun is receives only from morAning 11 am to afternoon 2 pm.
Because solar panel is always kept tilted 30°north and charges a smallalkaline (12 volts) battery
A new method has been introduced, where sun light is tracked from morning 6 am to 6 pm by moving the solar panel along with the movement of the sun using geared motor which is controlled by an electronic control circuit.
SOLAR PANEL
A photovoltaic module or photovoltaic panel is a packaged
interconnected assembly of photovoltaic cells, also known as solar cells.
Regardless of size, a typical silicon PV cell produces
about 0.5 – 0.6 volt DC under open-circuit and no-load
conditions.
The majority of modules use wafer-based crystalline silicon cells or a thin-film cell based on cadmium telluride or silicon
Crystalline silicon, which is commonly used in the wafer
form in photovoltaic (PV) modules, is derived from silicon, acommonly used semi-conductor. The solar panel used in the proposed system is of 70W rating.
STAND ASSEMBLY
The frame for the solar panel is made up of L shaped steel
rod of 1’5” depth. The length is 1.22m and width is 0.54m.
A square plate of dimensions 10x10 cm is made out of
steel plate is fixed to the main structure at the height of 120cm from the base.
CONTROL CIRCUIT DESIGN
The control circuit is used to sense sunlight falling on the
LDR, the switch in the circuit will be closed.
The LDR and a trim pot form a voltage divider which is
used to apply bias to a transistor.
As the LDR changes resistance the change in potential is detected by the circuit and the relay is activated.
CONCLUSION
In this paper, the hardware of a low cost automatic solar
energy trapping system has been designed and successfully implemented.
The designed that system which ensures 25 to
30% of more energy conversion than the existing static solar module system.