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Doo Chung

First Presentation

Questions from the first presentation

  1. When is the natural gas a potent greenhouse gas? Only when it is released in its natural form? If so then is this really a problem at all when burning it?
  2. Is there a way we can get methane from animals since you said they are the biggest source?
  3. What is it about natural gas that makes it so effective for domestic use? Why can’t more fossil fuel burning industries start using cleaner natural gas?
  4. What about gas-to-liquids? What is current production? What are proposed? I know Qatar and Shell are making a big plant.
  5. Why would the United States want 90% of its power plants to run on natural gas if we only have reserves for 10 years? Could the current power plants that run on natural gas be converted easily to those that run on unconventional gas?
  6. How dependent are we on natural gas; what percentage of our energy comes from natural gas?
  7. Are there the same politics surrounding natural gas as there are surrounding oil?
  8. Are there any proposed technologies that would allow us to exploit methane clathrates?
  9. What exactly makes “unconventional” natural gases unconventional?  Are they simply more difficult to extract, or is there something else about them that makes them more difficult to use as energy?
  10. Do you recommend decreasing US dependence on natural gas or making its usage more widespread? Why?
  11. How much energy is lost processing natural gas? What fraction of the chemical energy is required to liquefy natural gas for ocean transport?
  12. How do we extract and produce natural gas? How complicated is the process?

Some additional questions

  1. Dr. Auld mentioned that natural gas needs to be vented from the pipe network from time to time to avoid damaging the piping. Why? Is there an over-pressure, and if so, why? How much methane is vented annually? Is there an effort to reduce this wasteful leakage?
  2. How much methane leaks from pipelines in the former Soviet Union?
  3. Natural gas is frequently flared at oil fields. Is this practice increasing, decreasing, or remaining constant?
  4. What fraction of the chemical energy content of natural gas must be input as work to liquefy the gas for transoceanic shipment? Does an appreciable quantity of methane evaporate en route?
  5. How much would a carbon tax influence the comparative cost of natural gas and coal for electricity generation?
  6. What fraction of electricity that is made from natural gas in the United States uses a combined-cycle process? What is the typical efficiency of these installations and are any improvements in the offing?
  7. Is anyone using the combined-cycle cooling and power generation (CCCP) approach Dr. Auld mentioned? What does the forecast look like? For what applications would this be most advantageous? Would it make sense for HMC to supply (some of) our heating, cooling, and electricity needs with this approach?
  8. Stanford University has an on-campus cogeneration facility to supply campus heating, cooling, and electricity needs. When I was up there recently, I heard the claim that they can cut down on heating requirements by 80% by recovering heat from the returning chilled water. Is this true? How does that work?

~Peter Saeta 2010 March 09 at 10:11 PM PST


  1. What are comparative advantages/disadvantages of natural gas to oil?
  2. Why might the U.S. want to increase its consumption of natural gas?
  3. How long will it last?
  4. Where do they come from?
  5. What do we use it for?
  6. Liquefied Gas and its problems

[PNS] Some further questions you might consider:

  1. How has our consumption of natural gas varied over the past several decades and what do experts forecast for our consumption patterns in the near future?
  2. How have the sources of American natural gas evolved over time?
  3. Is storage a problem?
  4. Methane is a potent GHG. How much natural gas leaks from natural gas piping systems in the U.S. and around the world, and how much does this contribute to warming?
  5. What advantages and disadvantages are there to operating motor vehicles on compressed natural gas?

Second Presentation

  1. Answer questions from First Presentation
  2. LNG, CNG
  3. Non-Conventional Gas
  • Coalbed Methane
  • Hydrates
  • Geopressurized Gas
  • Deep Natural Gas
  • Tight Natural Gas
  • Shale Gas
  1. Industrial Use: Present and Future

Sources

  1. http://www.usgs.gov/science/science.php?term=770&n=22
  2. Burning Clean Fuel Gas Improves Energy Efficiency (Fonseca 2009)
  3. Depletion and the Future Availability of Petroleum Resrouces
  4. Gas-to-Liquid Technologies (Eliseev 2008)
  5. Natural gas reservestotal energy consumption (Toufiq 2002)
  6. EIA
  7. Energy at the Crossroads (Smil)
  8. Natural gas industry : NGI.: Global natural gas resources and status of exploration (Jiang Huai-you 2008)
  9. Natural-gas hydrates: Resource of the twenty-first century? (Collett 2002)
  10. Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluation of Technology and Potential (Moridis 2009)
  11. Gas hydrates: entrance to a methane age or climate threat? (Krey 2009)
  12. http://www.naturalgas.org/overview/unconvent_ng_resource.asp