Methane is a better long-distance energy carrier than electricity. Its storage and transportation is much cheaper and easier than electricity. Natural gas pipelines cost half as much to build as electric towers and have about one fourth as much transmission loss. They are also more reliable, safer and visually superior to ugly transmission towers.
Our electrical grid is only 30% efficient in delivering the energy in fuel burned to the customer. That efficiency could be doubled or even tripled if we used combined heat and power (CHP) generators located where heat is needed. By using the generator's waste heat, an efficiency of 85% is possible. Clearly it is smarter to expand our gas pipeline network than to build more electrical towers to distribute inefficiently generated electricity from massive power plants.
Even though most of our natural gas is now fossil fuel, a doubling of efficiency would be just as effective as achieving 50% renewable power as far as global warming is concerned. We can simultaneously work on greening our gas supply by feeding more and more biomethane into the pipeline. In Germany 22 billion kWh of biogas were produced in 2007. That's a six-fold increase from 1999, driven partly by feed-in tariffs. About half of that biomethane was from landfill and sewage gas and the other half was from commercial and agricultural biomass plants. Renewable biogas is produced by natural processes of anaerobic digestion or gasification then cleaned up for sale to the gas pipeline. Sweden already gets 25% of their energy from biogas.
Read more: http://www.renewableenergyworld.com/rea/news/article/2009/10/biomethane-as-an-energy-carrier
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