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Renewable Energy Sources

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Dave Huddle

on 15 November 2012

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Transcript of Renewable Energy Sources

Renewable Energy Sources Outline Provide context for and define "renewable energy"





Hydro power

Conclusion Geothermal Theory: Convert the earth's energy to electricity or heating/cooling.

History: Hot springs have been used for centuries.

Applications: Reykjavik, Iceland and OSU South Campus.

Pros/Cons: Low Greenhouse gas emissions per unit Power. Consistent. High Start-up Cost.

Uncertain future. Exploratory drilling is very expensive. Wind Biomass What is Hydro Power? Hydro Power David Huddle
Abdulla Al Ameri
James Li
Dan Stutzman
Yulong Gu
Zheyu Zhang Theory: Kinetic energy to electricity

Origins/History: -Sailing -Farming

Applications/Examples: -Wind Turbines

Pros/Cons: -Clean -Renewable -Simple -Unpredictable -Low efficiency -Location

Future: -Almost at max potential -More efficient THEORY Use the internal energy of the Earth to heat or cool buildings. Thanks for Watching What comes to mind? Luckily, a formal definition exists ! Geothermal Energy Thermal Energy generated and stored within the Earth. Heat pumps

Refrigerants Harness the internal energy of the earth to generate electricity. Heat exchangers


Turbines Heat Pump Heat Exchangers History Paleolithic Age: Bathing in hot springs

Lord Kelvin: Heat Pump

Prince Piero Ginori Conti

Robert C. Webber Applications Reykjavik, Iceland "renewable energy" -electric energy generated from solar, wind, biomass, landfill gas, ocean (including tidal, wave, current, and thermal), geothermal, municipal solid waste, or new hydroelectric generation capacity Theory:
Any biological material that can be used directly, or conerted into other energy products.
1. agricultural crop residues
2. farm animal wastes
3. wood waste
-"back from the secret of fire"
-in 1975 the name "biomass"
was first used Application: Biogass Pros and Cons: Pros::

-generally low cost inputs

-use of waste from aricultural
timber industries

-no net increase in carbon
dioxide Cons:

-large areas of land required

-over use can cause deforestation and other environmental problems

-some fuels are seasonal

-overall process can be expensive Future of Biomass -new technologies are
being developed
-relatively small
-government support
-a growing market really, an energy source is considered renewable if it is derived from natural proceses and is replenished constantly Renewable vs Nonrenewable Future is bright? Hydropower is electricity generated using the energy of moving water. Hydropower is one of the oldest methods of producing power
Hydropower is the most important and widely-used renewable source of energy.
Hydropower represents 19% of total electricity production.
Approximately two-thirds of the economically feasible potential remains to be developed. Features of Hydropower How Hydropower plants work ? Dam - Most hydropower plants rely on a dam that holds back water, creating a large reservoir.

Turbine - The water strikes and turns the large blades of a turbine.

Generators - As the turbine blades turn, so do a series of magnets inside the generator. Giant magnets rotate past copper coils, producing alternating current (AC) by moving electrons.

Transformer - The transformer inside the powerhouse takes the AC and converts it to higher-voltage current. Inside of Generator Hydroelectric power for the Nation Although most energy in the United States is produced by fossil-fuel and nuclear power plants, hydroelectricity is still important to the Nation, as about 7 percent of total power is produced by hydroelectric plants. Future: Potential at Nonpowered Dams in the US A new report released by the Energy Department analyzes the potential to generate clean hydroelectric energy at existing dams across the United States.

Thousands of dams across the country are not currently equipped to produce power. The report finds that if fully developed, these existing dams could provide an electrical generating capacity of more than 12 gigawatts (GW). This amounts to increasing existing U.S. conventional hydropower capacity by roughly 15%. Future: Potential at Nonpowered Dams in the US Water is free and renewable
Fuel is not burned so there is minimal pollution
Hydropower plays a major role in reducing greenhouse gas emissions
Relatively low operations and maintenance costs
The technology is reliable and proven over time High investment costs
Hydrology dependent
In some cases, hydropower could have large impacts on environment.
Good spots has been taken Pros & Cons Applications Ohio State University Pros Cons Almost entirely emission-free

Not subject to fluctuations

Small footprint

Virtually limitless

Inherently simple and reliable Prime sites are location specific
and tend to be far away from
population centers

Losses come with long distance
transmission of electricity

Drilling into heated rock is
difficult and expensive Future The future of geothermal energy is uncertain.

Cost, future research, and market demand will greatly influence the use of geothermal energy in the future. Theory Origins/History Examples/Application Farming Sailing Pros/Cons & Future Convert kinetic energy from the wind to a useful form of energy using a wind turbine Useful form of energy:


-Kinetic energy to drive machinary

-Chemical energy stored in batteries Device (wind turbine) used:

-Wind power plant

-Windmill/wind pump

-Wind charger source: http://www.akenergyauthority.org/Reports%20and%20Presentations/Fundamentals-of-Wind_Ian-Baring-Gould_NREL.pdf Pros:
•Renewbale energy
•Clean (no waste)
•Simple Cons:
•Low efficieny
•Location dependentcy
•Unpredictable Future
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