Do Now
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Transcript of Do Now
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Do Now1. What types of renewable energy
sources do you think are available in North Carolina?
2. Can you think of any renewable energy sources that are near Charlotte?
3. What is the biggest advantage of renewable energy over nonrenewable energy?
4. What is the difference between traditional and alternative types of energy?
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Exit Ticket1. What are two differences between
traditional and alternative energy sources?
2. List 1 traditional energy source-include 1 benefit & 1 cost
3. List 1 alternative energy source-include 1 benefit & 1 cost
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ALTERNATE ENERGY IN NORTH CAROLINA
SWBAT evaluate sources of alternate energy in North Carolina
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Political Connection! NC is one of just a few states in the US
that has a legislative renewable energy mandate. The NC Renewable Energy Portfolio Standard (REPS) requires that NC utilities must have a percentage of their retail sales come from renewable energy sources by specific dates – up to 12.5% by 2021.
BLAH, BLAH, BLAH! By 2021, 12.5% of North Carolina’s energy must come from renewable energy sources!
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BIG QUESTION! What types of alternative
energy would be most useful and most easily accessible in North Carolina.?
Aspects to consider: Weather, climate, Natural
Resources
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2 Major Advantages
Solar Energy
1. Solar energy’s “fuel’ is free 2. Solar energy is non-polluting *Instead of fossil fuels use
photovoltaic (PV) panels to convert sunlight directly into electricity.
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North Carolina Solar House The North Carolina
Solar House is a house on the campus of N.C. State University in Raleigh, NC. This house is run almost entirely off of solar energy.
Virtual Tour of the NC Solar House
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Solar Energy: Pros & ConsPros
Once they are manufactured, solar panels produce no pollution
Once solar panels are paid for, they continue to provide free energy
Solar energy production is very quiet, unlike energy created from fossil fuels and other forms of energy
Cons Initial cost of solar
panels Weather can affect
effectiveness of solar panels
Solar panels only work during daylight hours. This means they can only create energy during daylight hours, and must use stored energy during dark hours
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Nuclear Energy
Alternate Energy Sources
In nuclear fission, the nuclei of heavy atoms such as uranium-235 are bombarded with neutrons.
The uranium nuclei split into smaller nuclei and emit neutrons and heat energy.
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North Carolina State University Nuclear Plant
History of the reactor
Cons from a nuclear plant
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Nuclear Energy: Pros & Cons
Pros Create very small
amounts of pollution Very reliable (require
little to no outside fuel to operate)
High levels of electric energy can be created at one nuclear energy plant
Cons Radioactive waste
(must be monitored for 10,000 years after it is used
Example: Chernobyl Where was it? What happened?
Threat of nuclear terrorism
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Wind Energy
Alternate Energy Sources
In the next 50 to 60 years, wind power could be used to create between 5 to 10 percent of the country’s demand for electricity.
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Wind Turbines
Traditional Wind Turbine
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Modern Vertical Wind Turbine
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Wind in North Carolina
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Where are North Carolina’s Wind Turbines?
Are there any near Charlotte?
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Wind Turbines: Pros & Cons
Pros Self-sustaining
(does not require support from other resources or inputs)
Reliable Causes little to no
harm to plant and animal life on the ground
Cons Not 100% reliable
(wind speeds must be at least 16 mph)
Avian mortality (bird killers!)
High initial cost
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Hydroelectric Power
Alternate Energy Sources
The strong water flow that results drives turbines and electric generators.
The water held in a reservoir behind a dam is a form of stored energy that can be released through the dam to produce electric power.
Hydroelectric power is the power generated by falling water.
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Cowans Ford Dam Cowans Ford Hydro Station is
located in Huntersville, N.C., approximately 20 miles north of Charlotte on Lake Norman. It is the largest conventional hydro station owned by Duke Energy.
Cowans Ford Dam created Lake Norman, the largest man-made body of fresh water in North Carolina. The lake provides a dependable supply of water to Lincoln County and the communities of Davidson, Mooresville, Charlotte-Mecklenburg and Huntersville.
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Hydroelectric Power: Pros & Cons
Pros Completely
independent of fossil fuels
Can be shut off immediately (thermal plants can take hours, nuclear plants can take weeks)
Controls flooding Very few breakdowns
Cons Disrupts natural
ecosystems Plant decay that is
created as a result of dams can cause release of greenhouse gases
Expensive to build
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NC Energy Brochure Front: NC Alternative Energy Resources Inside folds: Solar Farm-5+ sentence description +
picture Nuclear reactor-5+ sentence description
+ picture Cowan’s farm dam Back: Pros & Cons of each energy source Argument of which alternative energy
source is best
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Resource Review Quiz 4.2 Powerpoint Write your answers in your
notebook
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Exit Ticket!1. Name the four types of alternative
energy sources that are available in North Carolina
2. Give an example of one specific renewable energy facility that is in North Carolina.
3. Describe the pros and cons of one facility you read about.