1 / 67

Nonrenewable Energy

Nonrenewable Energy. Chapter 15. 15-1 What Major Sources of Energy Do We Use?. Concept 15-1A About three-quarters of the world’s commercial energy comes from nonrenewable fossil fuels and the rest comes from nonrenewable nuclear fuel and renewable sources.

mitchell
Télécharger la présentation

Nonrenewable Energy

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Nonrenewable Energy Chapter 15

  2. 15-1 What Major Sources of Energy Do We Use? • Concept 15-1A About three-quarters of the world’s commercial energy comes from nonrenewable fossil fuels and the rest comes from nonrenewable nuclear fuel and renewable sources. • Concept 15-1B Net energy is the amount of high-quality usable energy available from a resource after the amount of energy needed to make it available is subtracted.

  3. How Long Will the Oil Party Last? • Saudi Arabia could supply the world with oil for about 10 years. • The Alaska’s North Slope could meet the world oil demand for 6 months (U.S.: 3 years). • Alaska’s Arctic National Wildlife Refuge would meet the world demand for 1-5 months (U.S.: 7-25 months).

  4. How Long Will the Oil Party Last? • We have three options: • Look for more oil. • Use or waste less oil. • Use something else. Figure 16-1

  5. Oil projections

  6. Natural Capital: Important Nonrenewable Energy Resources Fig 15-2

  7. Commercial Energy Use by Source for the World and the United States Fig 15-3

  8. International Energy information Click for International Energy Agency

  9. U.S. historical energy trends

  10. Energy flow in U.S.

  11. Net Energy Ratios for Various Energy Systems over Their Estimated Lifetimes Fig 15-A

  12. 15-2 What Are the Advantages and Disadvantages of Oil? • Concept 15-2A Conventional oil is currently abundant, has a high net energy yield, and is relatively inexpensive, but using it causes air and water pollution and releases greenhouse gases to the atmosphere. • Concept 15-2B Heavy oils from oil sand and oil shale exist in potentially large supplies but have low net energy yields and higher environmental impacts than conventional oil has.

  13. OIL • Crude oil (petroleum) is a thick liquid containing hydrocarbons that we extract from underground deposits and separate into products such as gasoline, heating oil and asphalt. • Only 35-50% can be economically recovered from a deposit. • As prices rise, about 10-25% more can be recovered from expensive secondary extraction techniques. • This lowers the net energy yield.

  14. General Classification of Nonrenewable Mineral Resources • Examples are fossil fuels (coal, oil), metallic minerals (copper, iron), and nonmetallic minerals (sand, gravel).

  15. Science: Refining Crude Oil Fig 15-4

  16. What comes from a barrel of oil?

  17. OPEC Controls Most of the World’s Oil Supplies • Possible effects of steeply rising oil prices • Reduce energy waste • Shift to non-carbon energy sources • Higher prices for products made with petrochemicals • Higher food prices; buy locally-produced food • Airfares higher • Smaller more fuel-efficient vehicles • Upgrade of public transportation

  18. Energy in CaliforniaForeign Source Crude Oil 2008 Click for Ca Energy Commission

  19. OIL • Inflation-adjusted price of oil, 1950-2006. • What is the cost today? Click

  20. U.S. oil supplies Click for EIA data

  21. The Amount of Oil That Might Be Found in the ANWR Fig 15-5

  22. Oil in the SBC Click for SB Channel Keepers Click for SB County

  23. Gasoline in California Click for animation: ground to car

  24. National Gasoline Tax

  25. What will motor vehicle fuel cost in the future? Annual Energy Outlook 2008 with Projections to 2030 Source: EIA: http://www.eia.doe.gov/oiaf/aeo/gas.html

  26. Trade-Offs: Conventional Oil, Advantages and Disadvantages Fig 15-6

  27. Oil Shale Rock and the Shale Oil Extracted from It

  28. Trade-Offs: Heavy Oils from Oil Shale and Oil Sand Fig 15-9

  29. 15-3 What Are the Advantages and Disadvantages of Natural Gas? • Concept 15-3 Conventional natural gas is more plentiful than oil, has a high net energy yield and a fairly low cost, and has the lowest environmental impact of all fossil fuels.

  30. How electricity is made in California

  31. How does natural gas get to your home? Click for EIA report

  32. NATURAL GAS • Russia and Iran have almost half of the world’s reserves of conventional gas, and global reserves should last 62-125 years. • Natural gas is versatile and clean-burning fuel, but it releases the greenhouse gases carbon dioxide (when burned) and methane (from leaks) into the troposphere.

  33. Liquified Natural Gas Click for EIA report

  34. Shale Gas by Hydraulic Fracturing

  35. Shale Natural Gas continued • Prices of Natural Gas have dropped: unit = 1000 cubic feet • 90s = $2, 2005 = $15, 2010 = $3.50 • Shale Gas reserves increased 50 % from 2007 to 2008 with 30% of this in Texas • Project $4/1000 cubic feet for next 80 years • Low Price Making Wind and Nuke investment slow or stop • Concerns about Groundwater Pollution

  36. Shale Natural Gas and Groundwater Many cases of water contamination from shale gas drilling operations, which use high-volume hydraulic fracturing (HVHF), exist: Thousands of problems, including spills, leaks, and the seepage of contaminants into drinking water supplies, have been documented around the country in conjunction with shale gas extraction by HVHF. ► Houses, water wells, and pipelines have exploded, and people have found methane levels in their water so high that they could light it on fire with a match. No studies have demonstrated that gas extraction operations using HVHF do not cause water contamination: In 2010, both the EPA and the House Committee on Energy and Commerce under Senator Waxman initiated major studies on the health and environmental impacts of hydraulic fracturing. Hydrofracking is not an exact science: When gas companies fracture the shale, they do not have complete control over where fractures will develop, so fracturing fluids and natural gas can move in unexpected directions,ending up in aquifers and water wells. Vast numbers of uncapped gas wells threaten aquifers and drinking wells: 18,000 to 48,000 abandoned oil and gas wells that have not been capped exist in NY. During hydrofracking and deep-well injection, the high pressure can force the toxic fluids up through any existing uncapped wells, contaminating aquifers and drinking wells. The process itself is not a problem. We know how to do these things correctly; we know how to do the job right … But there’s a lot of operators who aren’t doing it right.” Ron Nelson, a retired BP Amoco geologist . From Houston Business Journal, Oct 11, 2010.

  37. Natural Gas Projections by EIA

  38. Trade-Offs: Conventional Natural Gas Fig 15-10

  39. 15-4 What Are the Advantages and Disadvantages of Coal? • Concept 15-4A Conventional coal is very plentiful and has a high net energy yield and low cost, but it has a very high environmental impact. • Concept 15-4B Gaseous and liquid fuels produced from coal could be plentiful, but they have lower net energy yields and higher environmental impacts than conventional coal has.

  40. COAL • Coal reserves in the United States, Russia, and China could last hundreds to over a thousand years. • The U.S. has 27% of the world’s proven coal reserves, followed by Russia (17%), and China (13%). • In 2005, China and the U.S. accounted for 53% of the global coal consumption. • Burned in 2100 power plants, generates 40% of the world’s electricity

  41. Stages in Coal Formation over Millions of Years Fig 15-11

  42. Science: Coal-Burning Power Plant Fig 15-12

  43. Air Pollution from a Coal-Burning Industrial Plant in India

  44. Electricity production in U.S. Click of EIA report

  45. COAL • Coal can be converted into synthetic natural gas (SNG or syngas) and liquid fuels (such as methanol or synthetic gasoline) that burn cleaner than coal. • Costs are high. • Burning them adds more CO2 to the troposphere than burning coal. • Reduces net energy

  46. Coal Gasification Click for DOE project info

  47. Carbon Dioxide Sequestration Click for DOE info

  48. Coal Sequestration Costs • To sequester carbon dioxide will cost $25 per ton of carbon dioxide for a combined cycle plant. ($50 per ton of carbon dioxide for a traditional steam powered plant.) • This will increase the cost of producing coal 300% to $60 per ton of coal. • The power plant that burns the coal to make electricity would face a 50% rise in the cost of producing the electricity. This is around 2 cents/kW-hr. • The homeowner buying only coal produced electricity (at 10 Cents/kW-hr) will see a 20% increase (10 cents to 12 cents/kW-hr) in their power bill. • These estimates are from Scientific American, pp 52, July 2005

  49. CO2 Emissions Per Unit of Electrical Energy Produced for Energy Sources Fig 15-14

More Related