Energy sources such as wind, solar and biofuels are fast expanding their reach in the market. Can they grow fast enough, given their current miniscule contribution, to fill the gap of oil decline? Over the past 10 years, the installed capacity of solar energy has increased by 700%, while wind energy capacity has expanded more than thirteen-fold. That translates to 10-year annual growth rates of nearly 22% and 30%, respectively, which far exceed the single digit growth rates of many current energy economies.
According to a study done by the Renewable Energy Policy Network for the 21st Century, the fastest growing energy technology has been grid-connected solar PV, with total existing capacity increasing from 0.16 gigawatts (GW) at the start of 2000 to 1.8 GW by the end of 2004; a 60 percent average annual growth rate during the five-year period.
During the same period, they cite other renewable energy technologies grew rapidly as well:
• wind power: 28 percent
• biodiesel: 25 percent
• solar hot water/heating: 17 percent
• off-grid solar PV: 17 percent
• geothermal heat capacity: 13 percent
• ethanol: 11 percent
Renewables 2005:Global Status Report
However, even with these massive growth rates, renewable energy sources such as wind, solar, geo thermal and biofuels contribute just 2% of our primary energy with wind/solar less than 1%. An almost inconsequential contribution, given the twilight of the oil age on the near horizon.
Exxon Mobil projects an 11%/yr growth rate for solar/wind, providing 1% of our primary energy in 2030.
2005 Financial and Operating Review
The EIA projects the renewable share of world installed electrical capacity falls from 23 percent in 2003 to 22 percent in 2030.
http://www.eia.doe.gov/oiaf/ieo/electricity.html
The IEA states that in 2001, wind (onshore and offshore), solar and tidal energy represented only 0.5% of the renewable supply, which is equivalent to less than 0.1% of world’s primary energy.
The World Offshore Renewable Energy Report 2004-2008

U.S. Energy Consumption by Fuel (1980-2030)
Not only must renewable substitutes be created at a rate equal to the rate of depletion of nonrenewable resources, they must overtake them to allow for growth, and, they must rapidly scale up to reduce global greenhouse gases. Projects based on exploitation of nonrenewable resources should be paired with projects that develop renewable substitutes.
It may very well be that the global energy choices in the future will be driven more by environmental constraints than a deficiency of supply sources. A large amount of fossil fuels may just remain where they are because the assimilative capacity of the atmosphere and biosphere may be exceeded long before the fossil resource limits are exhausted. Few seem to grasp this possibility. I have studied it for years.
While there is an urgent need to develop alternative means of energy production and consumption in order to mitigate the impending effects of climate change, I believe that a large time scale (up to several decades) will be required until these alternatives can have a significant impact on the existing energy system. Especially in light of the fact that renewables are not considered a viable option in the Hirsch Report which focuses on mitigation wedges of EOR (enhanced oil recovery) coal to liquids, gas to liquids, heavy oil, and efficiency increases. They believe we need to develop more unconventional fossil fuels 10 to 20 years pre-peak to mitigate the decline of conventional oil. If these sources become untenable due to climatic conditions, we will have to rely on a transition to C02 free renewable sources of energy.
How long will it take to ramp up renewables to the point where they can provide a significant amount of our primary energy?
Remember, we are starting at an overall number of 2%, with wind and solar less than 1%.
How long can we wait to start a Manhattan Project for renewable energy?
Depends upon the date of peak and the decline rate, doesn’t it?
What if we are already here?
Let this be a discussion of the ramifications of developing renewables to replace the possible decline rates in hydrocarbons and renewables possible and realistic growth rates. This can also include nuclear. Remember liquid fuels are of primary importance.
The debate over various energies viability and development is for the Energy Technology forum.
Can we fill the gap of oil decline with renewables in time?
Is it too late?








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