The new Case Middle School buildings at Punahou (my alma mater) use something like that, but on a smaller scale. They freeze water at night when electricity is

The new Case Middle School buildings at Punahou (my alma mater) use something like that, but on a smaller scale. They freeze water at night when electricity is cheaper and then use it for cooling during the day. http://en.wikipedia.org/wiki/Punahou_School#Case_Middle_School http://en.wikipedia.org/wiki/Punahou_School#Case_Middle_Scho...