Monday, June 25, 2007

Looking at "Everything else"

I my previous post I pointed out that:


  • Transport = 35% of energy use and almost all of the oil

  • Electrical Generation = 40% of energy use and almost all of the coal, nuclear and renewables

  • Everything else = 25% of energy use, much of which natural gas.


I will split "Everything else" into "Materials", "Winter heating" and "The rest."



Materials


Manufacturing the materials our economy needs accounts for 11% of our energy use. Materials include:



  • Wood

  • Paper and paperboard

  • Plastics

  • Glass

  • Cement

  • Metals

  • Fertilizers

  • Chemicals

Approximately 60% of the energy required comes from natural gas and natural gas liquids (NGLs). NGLs can be a byproduct of oil refining but most are produced along with natural gas. Coal and miscellaneous things like forestry wastes provide almost all of the rest of the energy. Apart from NGLs, little oil is used.



Winter heating


Winter heating accounts for about 6.5% of total energy use. Residential consumption surveys show that over 70% of residential heating is provided by natural gas, and the proportion for commercial buildings is similar. Much of the rest is from oil. Winter weather has a substantial impact on energy prices.



The rest


This accounts for about 7.5% of total energy use. A little under a third is energy used in natural gas production and distribution. Another third is general manufacturing excluding materials manufacturing. Residential water heating, which accounts for 1.7% of total energy use, also falls in this category.

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