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Seawater desalination has existed for decades as a proven technology for supplying water in coastal areas; however, desalination processes are energy intensive and this has reduced their widespread use
It is noted that California offshore oil and gas platforms already use seawater desalination to produce fresh water for platform personnel and equipment
This visualization draws on the proposal that, as California coastal oil and gas platforms come to the end of their productive lives, they be re-commissioned for use as large-scale fresh water production facilities. Solar arrays, mounted on off-shore platforms, are able to provide some of the power needed for seawater desalination during the daytime
However, for efficient fresh water production, a facility must be operated 24 hours a day
The use of solar power transmitted from orbiting solar power satellites (SPS) to substantially augment the solar array power generated from natural sunlight is a feasible concept
As the visualization shown below illustrates, space satellites in geosynchronous orbit (GEO) will enable 24 hours a day operations for fresh water production through seawater desalination. Production of industrial quantities of fresh water on re-commissioned oil and gas platforms, using energy transmitted from solar power satellites, is a breakthrough concept for addressing the pressing climate, water, and economic issues of the 21st Century using space assets
TECHNICAL BRIEF
There are 27 offshore oil and gas platforms operating along the California coast. Ten are nearing the end of their productive lives and the U.S. Department of Interior, Minerals
Management Service estimates that their decommissioning will be completed by 2025. Complete removal is the only option allowed under current regulations. A high percentage of these platforms are deep water structures in water depths of 300-1200 feet; their sizes make removal both technically challenging and costly to the industry. Initial estimates for complete removal of all remaining platforms ranged from $1.2 to $2 billion
However, since current technologies are inadequate to remove the deepest platforms, the actual costs will likely be substantially higher with estimates reaching $1 billion per platform