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SOLAR POWER THE GREEN POWER… -BY1 SREEKANTH SHASTRY V JSSATE
CONTENTS2 OBJECTIVES INTRODUCTION A LOOK AT WORLDS ENERGY RESOURCES CONSUMPTION REMAINING RESERVES WHY FOCUS ON SOLAR ENERGY AVERAGE INSOLATION ON THE GLOBE EFFICIENCY LIFESPAN RECENT ADVANCES ADVANTAGES & LIMITATIONS CONCLUSION
OBJECTIVES3 To understand the potential & need for solar energy as a solution for the upcoming concerns of fossil fuels & global warming. To visualize solar energy as a major power source in the future.
INTRODUCTION4 The word Photovoltaic is a combination of the Greek word for Light and the name of the physicist Allesandro Volta. Photovoltaic’s (PV) is a method of generating electrical power by converting solar radiation into direct current electricity using semiconductors that exhibit the photovoltaic effect.
A LOOK AT WORLDS ENERGY RESOURCES CONSUMPTION5
REMAINING RESERVES AS OF 20096
CONTD…7 In 2008, total worldwide energy consumption was 474 exajoules with 80 to 90 percent derived from the combustion of fossil fuels. In 2009, world energy consumption decreased for the first time in 30 years (-1.1%) or 130 Mtoe (Megaton oil equivalent), as a result of the financial and economic crisis
WHY FOCUS ON SOLAR ENERGY?8 The world has a renewable usable energy flux that exceeds 120 PW a day Or 3.8 YJ/yr dwarfing all non- renewable resources. It has been estimated that the extraction of fossil fuels will be at peak by 2020. The demand for fossil fuels gets higher & higher making generation of power costlier.
Contd…9 At this rate, The fossil fuels will get depleted in nearly 120 to 150 years. Major implementations of solar power from now on can meet the power demand with less consumption of fossil fuels. Global warming is still an issue. Usage of fossil fuels as a major source is not going to help against global warming
AVERAGE INSOLATION ON THE GLOBE10
EFFICIENCY11 The efficiency of RSLE‘s new thin film solar cell exceeds 35%. A multi-junction solar cell reached 40.7 % efficiency level.
LIFESPAN13 The life of a solar panel depends upon various parameters. - Materials used - Amount of solar insolation received The range of lifespan varies from 20 to 30 years with a efficiency drop up to 25% over the rated efficiency.
RECENT ADVANCES14 Silicon wafers Thin film pv’s Multi-junction pv’s Multi-layered pv’s Sun Tracking Systems Maximum Power Point Tracking (MPPT) controllers
ADVANTAGES15 Solar energy is a renewable energy source It is highly reliable & is available abundantly. Other renewable energy sources become negligible. Solar cells require very less maintenance and they have a long life too.
Contd…16 Running costs are very low. Solar cells are very silent in their working. Photovoltaics have zero emissions, making it clean & green energy. Solar panels have materials that the manufacturer will take them back at their own expense for recycling.
LIMITATIONS17 Solar energy is not available at night, Storage options may cost high. At polar & surrounding regions the density of radiation is very less. Initial cost involved in photovoltaics is high, which is a major concern. Photovoltaics are not highly feasible for domestic purposes.
Contd…18 Its does not have a short term payback period. Solar panels just doesnt come like that. They include emissions during manufacturing stage. They cannot be completely recycled.
CONCLUSION19 Its time to accelerate the power generation with photovoltaic’s. The world is already feeling the crisis heat of fossil fuels. In future, we may have the much more worst scenarios dealing with fossil fuels. So, Solar energy is a great option which is renewable and will be always present on the globe.