solar energy
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Solar energy is the ultimate renewable resource provided by the sun. It comes in the form of solar radiation and can be harnessed using technologies like solar cells, solar cooking, and solar water heating. Solar energy is a sustainable source that does not pollute the environment or produce greenhouse gases. While the sun does not shine consistently, solar power can be collected, converted, and stored for use. Solar energy applications are ready today for homes, businesses, and industry, and it will certainly play an important role in the future.
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This document provides information about solar energy. It discusses that solar energy originates from the sun's thermonuclear fusion reactions. Solar radiation that reaches the Earth is called insolation. Solar energy can be used to generate heat and electricity. Methods of harnessing solar energy include solar thermal technologies like solar water and space heating, and generating electricity through photovoltaic cells or concentrating solar power plants. Developing solar power in Pakistan has advantages like being pollution-free and suitable for remote areas not connected to the national power grid, though initial costs and reliance only during daylight hours are disadvantages.
Shanu
This document provides an overview of solar energy, including the different types (passive, active, solar thermal, photovoltaic), how solar panels work to convert sunlight into electricity, and the advantages and disadvantages of solar power. It discusses that solar energy harnesses energy from the sun without pollution and can help reduce electricity bills. However, initial costs are high and solar panel efficiency is around 40%. The conclusion is that solar energy provides a powerful clean energy source if used wisely.
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The document discusses the benefits of solar energy as a renewable resource. It states that solar energy has the potential to meet humankind's total energy demand given that the amount of solar energy that reaches the Earth's surface in one hour exceeds our total annual energy consumption. It then provides an overview of the two main categories of solar power: solar thermal and solar photovoltaics. Solar thermal is used for water heating and cooking while solar photovoltaics generate electricity. The document outlines various passive solar applications and active solar thermal and photovoltaic technologies to harness the sun's energy.
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The document discusses the future potential of solar power in Bangladesh. It outlines that solar power could help electrify rural villages not connected to the national grid. Bangladesh receives a high amount of solar radiation throughout the year, with an average of 5.5 kWh/m2/day. This provides strong potential for solar energy development. Solar power would have advantages for Bangladesh as the sun is a free and pollution-free energy source, and solar technology is becoming more cost-effective. The government could help develop solar power by using solar panels on barren lands and installing solar street lights.
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The document discusses solar energy, including its various forms and applications. It provides information on:
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Solar energy presentation what factors does neeed to it
Solar energy is a renewable energy source that can be converted into other uses such as electricity and heat. The sun provides vast amounts of energy to the Earth, with the potential to meet energy demand many times over. Solar technologies include photovoltaics (solar panels), concentrating solar power, and solar heating. Solar energy systems take advantage of the sun's radiation to provide electricity and hot water for homes, businesses, schools, and other facilities.
Solar Energy
Solar energy is energy from the sun that can be converted into useful forms of energy, such as heat, light, and electricity. Solar energy originates from thermonuclear fusion reactions on the sun. It consists of radiant light and heat from the sun that is harnessed using a variety of ever-improving technologies such as solar heating systems, photovoltaics, and solar thermal energy. While solar energy has disadvantages related to cost, location, reliability, and inefficiency, it is a renewable source that can help reduce dependence on non-renewable energy sources if adopted more widely.
Quick View about Solar Energy
This document discusses different forms of energy and solar energy specifically. It covers:
1) The different forms of energy including kinetic, heat, chemical, electrical, sound, and nuclear energy. Energy can change forms but cannot be created or destroyed.
2) How solar energy works, from the photons emitted by the sun being absorbed by solar cells to generate electricity via the photoelectric effect.
3) The two main uses of solar energy - generating electricity using photovoltaic panels and getting heat from the sun for applications like drying crops. Solar energy is a renewable resource but production stops at night.
Renewable Energy
The document provides an outline for a presentation on renewable energy. It begins with definitions of energy and different forms of energy. It then discusses energy consumption statistics and types of energy sources, distinguishing between renewable and non-renewable sources. Advantages of renewable energy include its unlimited availability, lower emissions, and ability to be used locally. Key renewable resources covered include solar, biomass, geothermal, hydro, and wind power. Solar power is discussed in depth, including how solar cells and solar power stations convert sunlight to electricity. The document concludes by stating that fossil fuels will eventually deplete, leading to a necessary transition to increased use of renewable sources.
Solar energy
What is solar energy?
Types of solar energy
Solar thermal energy
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How are solar panels made?
How does solar energy works?
Uses of solar energy
Strenghts of solar energy
Weakness of solar energy
Opportunites of solar energy
Threats of solar energy
Solar technology
The document discusses different types of solar technologies, including passive and active systems. It describes passive technologies such as building orientation and materials that circulate air. It then explains two active technologies: photovoltaics which directly convert sunlight to electricity using solar cells, and solar thermal which uses collectors to concentrate sunlight and generate heat or electricity. The document provides details on photovoltaic cell components and types, as well as examples of solar thermal applications like drying, cooking, and distillation.
Solar Energy
This document provides an overview of solar energy. It discusses that solar energy originates from thermonuclear fusion in the sun and consists of radiant light and heat. It also discusses different types of solar radiation and how solar energy can be used for heating, cooling, and generating electricity through solar thermal technologies and photovoltaic cells. The document also discusses current and future prospects of solar power development in Pakistan.
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- 1. Solar Energy The Ultimate Renewable Resource
- 3. Present Energy Resources • Fossil fuels - coal, oil, gas are all of limited amounts. Cant be replaced. • Nuclear fuels -limited amounts of uranium for nuclear fission reactors but reprocessing of fuel possible. • Difficult to estimate how long these fuels will last - but is it sustainable economically or environmentally?
- 4. Sustainable situation • Renewable energy only resources are being replaced / generated at the same rate that they are being utilised. • All sources of energy ultimately come from the sun. • Diffrent Renewable energy resourses are • solar • wind • Geothermal • Agricultural and Forestry Wastes • Municipal and General Wastes • Hydro Power
- 5. What is Solar energy ? Solar energy is simple energy provided by the sun This energy in the from of solar radiation, which makes the production of solar electricity simply: SOLAR : SUN ENERGY:POWER SOLAR + ENERGY=SUN POWER Solar energy is environment friendly and freely available locally
- 6. What is solar radiation ? • Solar radiation is the radiation or energy we get from the sun .it is also called asx short -wave radiation .it comes in many forms such as visible light ,radio waves ,x-rays,uv rays. • Working principle of solar cell Sunlight is composed of photons, or bundles of radiant energy. When photons strike a PV cell, they may be reflected or absorbed (transmitted through the cell). Only the absorbed photons generate electricity. When the photons are absorbed, the energy of the photons is transferred to electrons in the atoms of the solar cell.
- 7. . • Solar cells are usually made of two thin pieces of silicon, the substance that makes up sand and the second most common substance on earth. • One piece of silicon has a small amount of boron added to it, which gives it a tendency to attract electrons. It is called the p-layer because of its positive tendency. • The other piece of silicon has a small amount of phosphorous added to it, giving it an excess of free electrons. This is called the n-layer because it has a tendency to give up negatively charged electrons.
- 8. How much solar energy? The surface receives about 47% of the total solar energy that reaches the Earth. Only this amount is usable.
- 9. How Does it Work?
- 10. Solar Cooking Consumes no fuels/wood Generates no air pollution Generates no greenhouse gases Produces no smoke Eliminates fire dangers Benefits of Solar Cooking solar energy applications
- 11. Solar Water Heating • Actually, the first solar water heating collector appears to have been built in the 18th Century by a Swiss scientist who constructed a simple wooden box with a glass top and a black base . Solar water heating is the most efficient and economical use of solar energy
- 12. Solar electricity generation Solar cells • convert light into a small electrical output -milliwatts output. • need a bank/array of cells for useful output. • cost of cells is high but reducing. • efficiency of cells is up to 23%/ improving. • are situated on roof of building. • . Power tower in Barstow, California.
- 13. FUTURE OF SOLAR ! • .
- 14. The house of the future? This zero-energy house and buildings Photovoltaics on BuildingsPhotovoltaics on house
- 15. Decentralized Energy efficient house; wind power on roof. Solar panels for heat and electricity. you may be picturing something like this solar array used by the space shuttle to provide for power needs in outer space. There are people who think that solar energy is something not quite down-to-earth and not ready to use today.
- 16. Let’s begin our overview of solar energy by asking: What do you see here? Take a close look – is this the profile of a beautiful young lady, or the face of an ugly, old woman? They’re both here, but for a variety of reasons that make up your own individual psychological make-up, some of you see one woman, some the other.
- 17. `When people think of solar energy, the same thing often happens. Some see it as something for the future, others see it as something that is here today. advantages • pollution free, indefinitely sustainable. • long life and easy to install • it can be usedin remote areas wheeit is too expensive to extend the electricity powergrid disadvatages • Sun does not shine consistently. • Crystalline silicon-more efficient, more expensive to manufacture • Addressed by approaching the problem through: 1) collection, 2) conversion, 3) storage.
- 18. What will that energy source be? The answer ought to be obvious. It’s been up there all the time Solar energy will certainly play an importan but it’s also here today and ready for hundreds of uses in homes,businesses, and industry.
- 19. THE END Solar Energy – A Bright Idea! “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
- 20. .