The Danish minister of education has opened a pilot energy storage facility which instead of using molten salt (see earlier story), will use hot stones in much the same way, heated to 600 degrees and insulated. The idea is to build a much bigger version of this pilot as a single facility for total Danish baseload. DTU university says it needs to store a 1.4 GW baseload by 2035, with 300 MWh stored and released on average every day. Norway’s Statkraft says it has built a larger virtual power plant in the UK that is already at 1 GW peak, and says it will double this to 2 GW by year end, and also that it is working on an…