Renewable_Energy

Renewable_Energy - Renewable Energy Solar Energy Harnessing...

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Renewable Energy
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Solar Energy Harnessing of radiant energy from sun to provide heat and/or electricity Electricity can be generated through photovoltaic cells or solar collectors Active solar collectors heat water or air and requires electrical input for pumps or fans Passive solar requires no moving parts
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Active Solar
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Passive Solar
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Pro’s Supply of solar energy is limitless Reduces reliance on foreign imports Only pollution is in manufacture of collectors Can store energy during day and release it at night – good for remote areas
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Con’s Inefficient where sunlight is limited or seasonal Maintenance costs are high Systems deteriorate and must be periodically replaced Current efficiency is between 10-25% and not expected to increase soon
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Hydrogen Fuel Cells 9 million tons of hydrogen is produced in U.S. each day – enough to power 20-30 million cars or 5-8 million homes Most is used by industry in refining, treating metals, and processed foods
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Pro’s Waste product is pure water Ordinary water can be used to create hydrogen Does not destroy wildlife habitats and has minimal environmental impact Energy to produce hydrogen could come from fusion reactor, solar, etc Easily transported through pipelines Can be stored in compounds to make it safe to handle (it is explosive – but so are others)
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Renewable_Energy - Renewable Energy Solar Energy Harnessing...

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