Rajeev Kumar

Faculty of Technology, UTU-Campus

Dehradun

Solar Energy

This presentation demonstrates on

the innovative idea to use of solar

energy.

“I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait ‘til oil and coal run out before we tackle that.”

-Thomas Edison

Solar power a bright idea

Introduction –Solar Umbrella

Working of Solar Panels

Future Aspect of Solar Energy

Solar Energy –a idea

• Solar energy is the ultimate Solar energy is the ultimate source of energy from millions of years and it is a renewable energy.

•This energy consists of radiant light and heat energy from the sun.

•Out of all energy emitted by sun only a small fraction of energy is absorbed by the earth.

•Just this tiny fraction of the sun’s energy that hits the earth is enough to meet all our power needs.

•Using present solar techniques some of the solar energy reaching the earth is utilized for generating electricity etc….

•Even then the energy demand met by using solar energy is very less.

Solar Energy – on Earth

The surface receives about 47% of the total solar energy that reaches the Earth. Only this amount is usable

Solar Umbrella- Introduction

•The installations of panels can be modified a umbrella structure.

•In this way it can be installed in any public places where required shaded area.

•This umbrella used a solar panel which has a several advantages, and provide a ample surface for mounted the panels, its design to allow the exposure of sunlight and conveniently portable.

Solar Panels required more area to installed

Solar Umbrella used area required by solar panels

Solar Umbrella- Design

• Solar umbrella is a generalized idea of a solar application, which has powered by solar radiation.

•This umbrella used a solar panel & provide a ample surface for mounted the panels

• Its design to allow the exposure of sunlight and conveniently portable.

•The solar powered umbrella has providing shades for the user making outdoor experience more enjoyable.

Solar Umbrella- Panels

• When solar panels are placed in the sunlight , photons will strike the surface and emits electrons.

• As a result electron hole pair is created in the solar cell.

• When external circuit is connected to the solar cell , electrons flow in the circuit and the current is generated

Types of Solar Panels

Monocrystalline –

• Monocrystalline cells are made from a thin wafer cut from a single large crystal of silicon.

•The cells are then doped and the fine current collecting wires printed on or in the surface of the cell.

•This type of cell takes more energy to make than any other, and so has a greater energy payback period, though this is usually still within five years

.

Polycrystalline -

• Polycrystalline cells are made from thin wafers of silicon cut from a large cast billet.

•The billet is not a large single crystal, but many crystals clumped together, hence the name

•Polycrystalline cells must have current Collecting grids printed onto them

•Polycrystalline cells are usually slightly less efficient than monocrystalline cells, but because they are square, can be fitted into the rectangular frame of a solar panel with high space efficiency

Amorphous –•Amorphous thin film panels involve deposition of very thin films of silicon or other materials directly onto a substrate such as glass or stainless steel.

•This technique produces a cell with a lower efficiency than the cut wafer varieties, but has the advantage of eliminating the need for inter-cell connections.

•Uni-Solar makes triple-junction , nine-layer thin-film amorphous panels with a much higher efficiency than the older types.

•The layers of silicon are deposited directly onto a stainless steel substrate and are then coated in a flexible plastic protective layer.

Electrical Characteristics solar panel

Block Diagram

Future Aspect

•Restaurants

•Beach Areas

•Public Place

•House – small power plant