Desertec seems to be planning a water-based system: "...added benefit of the concentrated solar power, or CSP process is the desalination of water...". Doesn't

Desertec seems to be planning a water-based system: "...added benefit of the concentrated solar power, or CSP process is the desalination of water...". Doesn't that mean it will be a daytime-only system? Wouldn't using seawater rapidly corrode the system itself? Years ago, solar in Northern Africa for sale to Europe was pitched as a way to apply the technologies used in Solar Two (http://en.wikipedia.org/wiki/The_Solar_Project#Solar_Two http://en.wikipedia.org/wiki/The_Solar_Project#Solar_Two). That system used molten salt in order to provide 24-hour power generation. It looks like http://en.wikipedia.org/wiki/Solar_Tres_Power_Tower http://en.wikipedia.org/wiki/Solar_Tres_Power_Tower is being built in Spain. http://www.economist.com/displaystory.cfm?story_id=13725855 http://www.economist.com/displaystory.cfm?story_id=13725855 has some interesting discussion of thermal solar as a technology.