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23-01-2010, 01:33 AM
Post: #1
renewable energy resources ppt

.ppt  RENEWABLE ENERGY RESOURCES.ppt (Size: 990.5 KB / Downloads: 1717)
Abstract:
Renewable energy is energy generated from natural resources such as sunlight, wind, rain, tides, andgeothermal heat, which are renewable (naturally replenished). While most renewable energy projects and production is large-scale, renewable technologies are also suited to small off-grid applications, sometimes in rural and remote areas, where energy is often crucial in human development.

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23-04-2010, 02:35 PM
Post: #2
RE: renewable energy resources ppt

.ppt  RENEWABLE ENERGY RESOURCES.ppt (Size: 989.5 KB / Downloads: 934)

RENEWABLE ENERGY RESOURCES


Presented by
SARNYA M
LATHA S





contents

Types of sources
Solar power
Hydro power
Wind power
Biomass
Solar-hydrogen
Geothermal
sustainable energy
conclusion




Renewable Energy Resources!

Biomass
Hydroelectric power
Geothermal
Solar”passive and active
Wind generation
Hydrogen power




Using Solar Energy to Provide Heat and Electricity

Passive solar heating
Active solar heating




Using Solar Energy to Provide High-Temperature Heat and Electricity

Solar thermal systems
Photovoltaic (PV) cells




Producing Electricity from Moving Water

Large-scale hydropower
Small-scale hydropower
50% of West Coast electricity
7% of US electricity
20% of Worldâ„¢s electricity
Major environmental impacts
High construction costs




Impacts of hydropower on salmon and other riverine spp.

Pollution
Disruption of water flow
Loss of biodiversity
Invasive species




Impacts of hydropower on Species and People
_______________
Dams can provide many human benefits but:
Disrupts ecological services rivers provide; e.g. 119 dams on Columbia River have caused a 94% drop in wild salmon; removing hydroelectric dams will restore native spawning grounds
Displaces millions of people worldwide as reservoirs flood traditional homelands
No room for expansion in the US






Producing Energy from Biomass

Biofuels
Biomass plantations
Crop residues
Animal manure
Biogas
Ethanol
Methanol




The Solar-Hydrogen RevolutionExtracting hydrogen efficiently

Storing hydrogen
Fuel cells




Geothermal Energy

Geothermal reservoirs
Dry steam
Wet steam
Hot water
Molten rock
Hot dry-rock zones




Creating a Sustainable Energy FutureIncrease fuel efficiency standards for vehicle, appliances, buildings

Tax and other financial incentives for energy efficiency
Subsidize renewable energy use, research and development
Internalize externalities for fossil fuels
By 2050:
Increase renewable energy to 50%
cut coal use by 50%
phase out nuclear altogether




conclusion

Thus we see about the renewable energy sources , itâ„¢s types , applications , merits and demerits

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29-10-2010, 11:36 AM
Post: #3
RE: renewable energy resources ppt

.ppt  Energy.ppt (Size: 314 KB / Downloads: 318)
Energy Resources: Production and Consumption


Environmental Sustainability Educational Resources
prepared by
Gregory A. Keoleian
Associate Research Scientist,
School of Natural Resources and Environment
Co-Director, Center for Sustainable Systems
University of Michigan


Non-Renewable Energy Sources

Conventional
Petroleum
Natural Gas
Coal
Nuclear
Unconventional (examples)
Oil Shale
Natural gas hydrates in marine sediment
Rating renewable energy resources ppt Options
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