Technology helps to drive this. As discussed previously, energy storage in batteries is not sufficiently high to solve the basic problem. Last time we talked about Pumped Hydro Storage Systems Pump water up hill for later recovery at times of peak demand. About 10 times higher per cubic meter than water. Compression is done by electrically driven air compressors System delivers 300 Megawatts for 2 hours by using the compressed air to drive a turbine Difficult to measure the efficiency of this system.
Temperature is measured in Kelvins .
Hydrogen can be easily separated from Oxygen in water via Electrolysis. For use as a secondary fuel, Hydrogen needs to be stored as a liquid. As a liquid its energy density per unit volume is 1000 times higher. But, one can make a hydgrogen-oxygen fuel cell Using a catalyst, hydrogen combines with oxygen to make water plus electricity. Hydrogen is extracted from methane and steam to make Carbon Dioxide.