LAB 6: S LAR ENERGY Key Q: What other energy sources are there?
Transcript of LAB 6: S LAR ENERGY Key Q: What other energy sources are there?
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LAB 6: S LAR ENERGY
Key Q: What other energy sources are there?
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Energy from the Sun
• The sun has produced energy for billions of years
• SOLAR ENERGY is the sun’s rays that reach the Earth
• This energy can be converted into other forms of energy, such as heat and electricity
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A basic law in physics is that…
energy can't be created nor destroyed...only transformed
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In other words, take the sun's solar energy and transform it into the energy you need
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The Suns Energy…
-Provides heat
-Drives photosynthesis
-Drives the water cycle
-Drives Wind
-Can be converted into electricity using
photovoltaic cells
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Solar Heating Systems
ACTIVE PASSIVE
• Devices capture the sun’s energy
• No equipment
• Buildings with many windows allow heat in
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Solar energy can be converted to electricity in 2 ways:
PHOTOVOLTAIC CELLS A device used to change
sunlight directly into electricity
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CONCENTRATING SOLAR POWER
PLANTS
generating electricity by using sunlight to
heat a fluid which produces steam that is
used to power the generator
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How Solar Panels WorkAMS Solar Power
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• A RENEWABLE RESOURCE
• DOES NOT EMIT POLLUTANTS when generating electricity
• Produces electricity very QUIETLY
SOLAR Energy – ADVANTAGES
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MORE ADVANTAGES…
• Solar panels can be installed on top of many ROOFTOPS (don’t have to find space)
• Energy from the sun is FREE for years to come with virtually
NO MAINTENANCE
• Solar Electricity CAN BE STORED FOR LATER USE
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EVEN MORE ADVANTAGES…
• FINANCIAL INCENTIVES from the government
• SAVES YOU MONEY
on your electric bill (if you have one at all)
• Allows us to become LESS DEPENDENT on fossil fuel supplies & foreign imports
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A FEW MORE ADVANTAGES…
• EXCESS ELECTRICITY generated can be SOLD to power companies
• More solar panels CAN EASILY BE ADDED
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SOLAR Energy – DISADVANTAGES • Solar Panels can be EXPENSIVE
initially
• Some households may need MORE THAN ONE
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• Solar panels require a LARGE AREA FOR INSTALLATION
to achieve a good level of efficiency
• Solar powered CARS ARE
SLOWER
MORE DISADVANTAGES…
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• Efficiency relies on the LOCATION OF THE SUN
• Solar energy is influenced by
CLOUDS or POLLUTION
• Solar power CANNOT BE GENERATED AT NIGHT
EVEN MORE DISADVANTAGES…
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