There are technically feasible medium-to-long-term energy solutions involving nuclear power -- my favorite are liquid fluoride thorium reactors, but there are other good designs -- and the waste heat from those can be used for desalination.
To get some approximate numbers, here's a presentation from Dr. Per Peterson at UC Berkeley:
A 1 GWe fourth-generation reactor, using efficient Brayton-cycle gas turbines, could produce approximately 100,000 m^3/day of fresh water, without decreasing the amount of electricity it produces or harming its generation efficiency. About eight of those could supply San Diego (1.2 million people) with all its water needs.
To get some approximate numbers, here's a presentation from Dr. Per Peterson at UC Berkeley:
http://www.esd-ans.org/cms/index.php?option=com_docman&a...
A 1 GWe fourth-generation reactor, using efficient Brayton-cycle gas turbines, could produce approximately 100,000 m^3/day of fresh water, without decreasing the amount of electricity it produces or harming its generation efficiency. About eight of those could supply San Diego (1.2 million people) with all its water needs.