Insulated piles of sand heated with resistive heaters to 500dF. Air heat exchanger. Seems simple enough to DIY and scale down.
Need to do some math. To figure out system size. Drying the sand would be important.
Need to do some math. To figure out system size. Drying the sand would be important.
Solar and wind energy can now be stored in ‘sand batteries’
A cheap way to store heat at 500C all year round, sand could help ease Europe’s energy problems.
www.euronews.com