1.V.REVATHIAMBIKASAMS College of Engg & Tech., Chennai.

2. INTRODUCTION Energy is the power to do works and drive machines. Energy cant be made or destroyed, regarding motion,there are kinetic and potential energy. Regarding power, there are two main kinds of energy 1. Renewable energy 2. Nonrenewable energy 3. Classification of Renewable energyBioenergyGeothermalWindSolarHydrogenTidalAnd many more... 4. Solar energy Most renewable energy comes either directly or indirectly fromthe sun. Sunlight, or solar energy, can be used directly for heating andlighting homes and other buildings, for generating electricity. Solar radiation is radiant energy emitted by the sun, particularlyelectromagnetic energy. About half of the radiation is in thevisible. Solar technologies are generally classified as Active andPassive solar energy 5. Definition of photovoltaicPhoto = light and photons = energyparticles coming from sunlight;voltaic = producing a voltage or volts. 6. Photovoltaic (PV) Effect When sunlight is absorbed by the materials, the solar energyknocks electrons loose from their atoms, allowing the electrons toflow through the material to produce electricity. Several connected PV arrays can provide enough power for ahousehold; for large electric utility or industrial applications,hundreds of arrays can be interconnected to form a single, largePV system. 7. PHOTOVOLTAIC SOLAR PANALS It convert sunlight directly into electricity. It consists of several connected 0.6-V dc PV cells, which are made out of asemiconducting material sandwiched between two metallic electrodes. The photovoltaic effect refers to the separation of minority carriers [electrons andholes] by a built-in electric field, such as a PN-junction or Schottky barrier. Thin-film crystalline-silicon solar cells consist of layers about 10 m thick comparedwith 200- to 300-m layers for crystalline-silicon cells. 8. Thin film technology Thin-film crystalline-silicon solar cells consist of layers about 10 m thick compared with 200- to 300-m layers for crystalline-silicon cells. Advanced Energy provides highly reliable power conversion and control solutions to thin films manufacturing companies around the world. 9. Copper and indium are deposited by magnetron sputtering, followed by selenization toform the high-absorbing ptype semiconductor cuinse2, which is combined with an n-type electrode of zno to create thin-film solar modules A=Barrier/Mo deposition B= Laser patterning C=Cu/In/Se deposition D=Heat treatment 500C E=Chemical deposition 60C F=Patterning G=2nd deposition 200C H=Patterning I=Contacts/lamination 10. Wind power It converting wind energy intoelectricity by using wind turbines. Wind comes from atmospheric changes;changes in temperature and pressuremakes the air move around the surfaceof the earth. A wind turbine captures thewind to produce energy. It create power without using fossilfuels, without producing greenhousegases or radioactive or toxic waste.Wind power is one of the best ways tocombat global warming. 11. Nuclear Energy It is produced by a nuclear reactionwhen the splitting or fusion of atomsoccurs. Nuclear fuel does not producegreenhouse gases, so will notcontribute to global warming. There isa relatively long-lasting supply ofraw material. The main issues that come up withnuclear energy are the safety 12. Free Energy/Radiant Energy It is the energy of electromagnetic waves. The oceans and other waters of the world coverover 70% of the Earths surface. Free Energy device/method would drawadditional power from the sea of UniversalEnergy in which all matter is carried, and it isthought that such a device would produce moreenergy than is used to run it, also known asOver unity. Constantly moving, which allows many waters 13. SQUIDS/OCEAN RADIENT ENERGY It has an inflatable absorber similar to a large balloon which fills with sea water. Sitting just under the surface, the absorber is moved by passing waves and the energy from this motion drives a generator to produce electricity. Scotlands leading marine energy test centre has opened 14. MEMS & Nanotechnology Ultra low power electronics MCUs, RTCs, DSPs Smart devices in everything, Sensors everywhere for data capture and analysis, Wireless is pervasive, Miniaturization, Integration, High Reliability, Eco-friendly solutions, Renewable energy sources, Reduced life cycle costs. 15. Good MaterialsBAMBOO CORK COCONUT 16. Renewable energy from natural resources Synthetic solar cells created on tobacco plants Generating energy from evaporation on a leaf Electricity from bacteria and grass clippings Generating energy from trees to power sensors Virus Battery Energy from Cactus Living Batteries Frog-inspired technology to generate biofuel using artificialphotosynthesis Harvesting energy from Spinach Energy to run LEDs harvested from trees 17. Advantages & disadvantages of nuclear energyAdvantages Disadvantages Nuclear power costs It is very, very dangerous.about the same as coal, It must be sealed up andso its not expensive to buried for manymake.thousands of years to Does not produce smoke allow the radioactivity toor carbon dioxide, so it die away.does not contribute to For all that time it mustthe greenhouse effect. be kept safe from Produces huge amountsearthquakes, flooding,of energy from small terrorists and everything else. 18. Advantages and Disadvantages ofNon-renewable ResourcesADVANTAGES It provide United States with electricity, gasoline and heat in thefuture. Oil, petroleum, natural gas, coal and uranium, are some of theprimary sources of fuel used to provide power and heat to manyindustrial, commercial and residential consumersDISADVANTAGES Limited sources of energy 19. Saving Energy Quality Excellence ReliabilitySaving Money Range Support and ServiceSaving the Cost-effective Environment Efficient Clean and sustainable 20. CONTROLLERS AND REGULATORSSOLAR CHARGE WIND TURBINE 21. Renewable energy technologies can help contribute to a clean and secure energy future for our nation and the worldAs an electricity providerAs a farmer or rancherAs a homeownerAs a small business owner 22. our earth.We have to make a balancebetween energy consumption andenvironment protection.We have to make more efforts toensure that the worlds resourcesare to be used in a sustainableenergy. 23. THANK YOU