Part I of this three-part series set the stage for examining intermittent power sources, especially wind, as viable sources of electricity. Part 2 addresses one of the critical power considerations: power density.
In his MasterResource series, Vaclav Smil compared the power densities of a range of fuels for electricity production, which demonstrates the inadequacies of renewables. David MacKay also makes a useful contribution to this topic.[i] Table 1 summarizes the results, which take into account entire fuel cycles, transportation and transmission requirements for a range of assumptions.
Note that all renewable energy sources are ten to over a thousand times less effective than those serving our needs today, with wind providing one of the poorest performances of the renewable sources shown, outside of wood. Areas required for renewables are large because of the dispersed, and often remote, nature of their energy supply.…
Based on policy pronouncements of governments, the media, and Left environmentalists, one might believe the world is about to enter the renewable energy era. In reality, however, the “new” is about a long gone era that ended before the dawn of the 20th century. Then the primary fuel was wood. Other renewables, including water and wind, were used because they were available and technologically harnessable for some very localized situations.
However primitive, renewables relating to the sun’s flow was the best our ancestors could do.
Will there be a renaissance of this era? Perhaps there will be, but it will be in a significantly different form and dependent upon a vastly transformed world, in both technological and societal terms, which will not be achievable for many generations. The question is: are we as societies and individuals prepared to make the necessary adjustments to realize the potential opportunities, which we do not currently understand sufficiently, that this may present in the future?…
The North American Electric Reliability Corporation (NERC), an international regulatory authority whose purpose is to ensure reliability of the bulk power systems in North America, has just released a study on the Reliability Impacts of Climate Change Initiatives. It provides a comprehensive review of future reliability risks including smart grid initiatives. NERC appropriately looks at a number of future time frames, or horizons, which provide perspective in its analysis – 1-10 years, 10-20 years, and 20-plus years (up to 2050).
A review of the NERC study by Environment & Energy Publishing (E&E), reproduced as an appendix to this post, noted:
“A task force on climate change formed by North American Reliability Corp. urges that policy makers not count on large amounts of renewable energy, demand reduction from smart grid systems or new storage technologies before they prove they can be worked into the grid without endangering the system’s reliability.”…