Comment Re:Except at night. (Score 1) 164
How many molten sodium plants are operational
I was able to find two that were operational:
Crescent Dunes Solar Energy Plan - US
Gemasolar Thermosolar Plant - Spain
which isn't as much as I would have expected. However, the these types of plants are relatively new, and molten salt is the latest and greatest in the industry, so it's not a total surprise.
If you are worried about heat loss, molten solar only loses 1 degree F per day. source: http://www.solarreserve.com/en...