Y12 energy presentations 2013


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Y12 energy presentations 2013

  1. 1. TYPE OF ENERGY: Coal Coal Coal is the number 1 global energy polluter. Coal accounts for 50% of US electricity generation.Except South America, all continents have substantial coal reserves. In 2006, coal supplied 25% the worlds energy.
  2. 2. How does it create energy? Coal is burned in power plants.The process to generate energy from coal involves mining the coal, then transporting, cleaning and burning it. Water heated by burning coal converts into steam and generates electricity. Each stage of this process generates pollution.
  3. 3. Alternative MethodCoal could create energy through coal gasification which is a process which converts solid coal into a gas that an be used for power generation. This method is more environmentally friendly as it removes sulphur and other contaminants.
  4. 4. What % of the worlds energy comes from coal? In 2006, coal supplied one quarter of the worlds energy.Although this proportion has fallen steadily over the past 20 years, world production actually increased by over 60% between 1986 and 2006.Coal production increased everywhere except Europe with Asia (including China) recording the fastest growth.
  5. 5. What country uses coal the most? China.
  6. 6. Where is coal found? Coal is found underground. The biggest supply of coal is found in the USA.
  7. 7. Pros Produces a lot of energy when burned The U.S. contains one-quarter of the worlds coalreserves, which could provide more energy potential than all the known recoverable reserves of oil. Provides jobs for Americans.
  8. 8. Cons Less transportable than oil and gas because... It contains a larger proportion of waste It has lower calorific value than oil and gas It is a solid and less transportable by than liquids and gasesIt is less versatile than oil, having little value for the transport industry
  9. 9. By Als and Kels
  10. 10. Oilby Ella & Gin
  11. 11. How does oil create energy?Oil is a form of stored energy which is releasedduring combustionIt comes from plant matter which isdecomposed to form hydrocarbons which burnsas fuel
  12. 12. What percentage of the worlds energy comes from oil? In America, 16.5% of their energy comes from oil In Africa 12.1% comes from oil The Middle East is 13.1% More than half of Eurasias oil comes from Russia 47% of the worlds energy is from oil.
  13. 13. Where is oil found?In the Middle East oil is the most accessibleCanada, Iraq, Iran, Venezuela, US, Russia,LibyaOil is found in pores that are buried deepbeneath the earths surface, between layers ofhard rock
  14. 14. Pros for using OilNo other energy source can movevehicles with greater speed atlonger distances than oil.It creates jobs for the localeconomyIt can be used in carsIt can be converted into electricityIt can be used in plastics and wax
  15. 15. Cons for using oilOil is nonrenewable and so it will run outBurning oil pollutes the environment by releasing CO2 and other toxicgassesBig oil rigs are needed to extract oilOil leak may occur which result in environmental disaster like killingwild live, disturbing the biodiversity of that area and this takes years toclean upIt is expensive and dangerous to transport itDrilling for oil is unpredictable and takes a lot of time to search for oil
  16. 16. Thanks for listening!
  17. 17. new able E ne rg yRe
  18. 18. HOW DOES IT CREATE ENERGY?Counts for 13% of world primary energyproduction80% of this energy came from combustiblerenewables (mainly wood for heating)17% came from hydropowerAltogether wind,tide, geothermal and solarenergies contribution to total world energyproduction Is just 0.5%
  19. 19. Geothermal energyThe natural heat found in the earths crust in theform of steam, hot water and hot rock. This sourceof energy can be used to produce electricity or itshot water bath can be used directly for industry,agriculture etc.eg. In Iceland hot springs supply water at 86 deg cto 95% of the buildings in and around ReyhjavikThe number of countries producing power from thissource could rise from 21 in 2000 to 46 in 2010The USA is the world leader in geothermalelectricity and accounts for 0.37% of electricityused in the US
  20. 20. Where is IT found? Share of renewables by religion (total primary energy supply)Africa holds the largest share of 49%Wind energy has an annual growth rate 48%Renewable energies rely on the elements to produce electricity thereforeHot countries are best suited to provide solar energyMountainous religions such as the Andes can provide HEPIslands can obtain great stores of tidal energy and wind energy
  21. 21. Positive impactS Renewable therefore less damage to the environment Will never run out Does not aggravate global warming Reduce fossil feel dependency Decreases necessity for nuclear waste Reduces the need for importing from east (therefore improvestrade balance) Unlimited (infinite) quantities
  22. 22. Negative impactsRich countries in n America and Europe have adisproportionate share of the new renewables eg.Cahora Bassa damLimited by high capital costsNeed for sophisticated technologiesVisual pollutionConservationists worry about wind turbines affects onmigrating birdsHEP dams can damage fishing industries and delicateecosystems
  23. 23. HEP(Hydroel ectric Power) By Frannigans N Gabbigans
  24. 24. HOW DOES IT CREATEused to hold thewater and createpressure so that the ENERGY?water can producemore electricalpower. There is The big four HEPgravitational nations of China,potential energy Canada, Brazil andstored in the water the USA accountand this energy is for over 46% ofused to turn the global total.generators and createelectricity. Electricalgenerators are turnedby massive turbinesand createelectricity. Waterflows through thesetunnels with greatpressure and is usedto turn theseturbines. If there is agreater volume ofwater or there is avery large differencebetween the waterlevel and where it
  25. 25. Where is IT found?Which countries are theLatin America is the thisbiggest users of biggestuser of this energy?source of source of energyThe UK generate about 1% of itselectricity from HEP.This figure is low because mostcommercially attractive andenvironmentally acceptablesites are already in use.However, in July 2005, Scottishministers approved plans tobuild a new HEP generatingstation in Inverness. The newplant will generate up to100megawatts of electricity.
  26. 26. Out Positive impactS of the 5 major sources ofenergy, HEP is the only one whichis renewable, wahoo!It is a reliable source of energyin areas where it is suitable tobuild a dam (I.E. fast flowingwater in a valley).There is scope for small scaleHEP plants to supply localcommunities.
  27. 27. Negative impacts can have a huge negative impact on the envi g probs 4 da aquatic lyf.on in water quality. land to be flooded.Methane gas if large forests are submerged
  28. 28. Dam(n) jokes What did the fish say when it swam into a wall?...... Damn!!!! Lolz