1. Current Energy Sources By Julian Contreras, Julio Contreras, Kevin Pascua, and Ilian Meza Instructor: Kenny

2. Coal The average efficiency of all coal power stations in the world currently stand at around 31% 3,700,000 tons of carbon dioxide (CO2) is produced a year, the primary human cause of global warming--as much carbon dioxide as cutting down 161 million trees. Anthracite Coalemits 1595 lbs. CO 2 /ton Coal is estimated to last for at least the next 119 years Coal is a readily combustible black or brownish-black sedimentary rock normally occurring in rock strata in layers or veins called coal beds

5. fossil fuel that is created similarly to oil and coil by being the remains of microorganisms million of years ago consist of mainly methane but also includes ethane, propane, butane and pentane is colorless, shapeless and odorless Collected by drilling holes in the earth’s surface Natural Gas

8. Engines -Uses combustion energy to convert gasoline into movement. -Currently the easiest way to convert gasoline -Ignites gasoline in pressurized area to create explosion to cause movement -Diesel engines do not use sparks, just pressure to cause explosion www.dlist-benguela.org

9. Petroleum Petroleum (crude oil) is a natural occurring, toxic, flammable liquid Found under the Earth’s surface Used as gasoline, kerosene, asphalt, and chemical reagents to make plastic and pharmaceuticals www.eia.org

10. Combustion Energy Energy released as heat when a compound undergoes complete combustion with oxygen Chemical reaction is typically a hydrocarbon reacting with oxygen to form carbon dioxide, water, and heat Mostly used for vehicles with engines www.ncpa.org

11. What is Uranium?? Uranium is a heavy, silvery- white metal which is pyrophoric (Spontaneousl y igniting in air.) when finely divided. http://periodic.lanl.gov/elements/92.html http://www.thefreedictionary.com/pyrophoric It is a little softer than steel, and is attacked by cold water in a finely divided state. It is malleable, ductile, and slightly paramagnetic Very radioactive

12. Nuclear Energy How it works: http://www.oncor.com/images/knowledgecollege/h20.jpg

13. Comparing Energy Sources Energy Source N (efficiency) Energy Density( MJ /kg ) or ( MJ/ m 3 ) Cost (US$ / kWh ) PollutionPercent generated in US Coal31%240.055High44.9% Combustion15%450.116High1% Natural Gas25.3%33.4 – 82.70.045Low23.4% Uranium (Nuclear) 33-35%5.7x10 5 1822555None20.3% www.nuclear.gov/pdfFiles/NuclearEnergy_Roadmap_Final.pdf http://en.wikipedia.org/wiki/Fuel_efficiency

14. Future Presentation Solar energy Hydroelectric energy Geothermal energy Wind energy