A 50x1cm steam plasma tube at 4 atmospheres produces 1.2MW of heat, we can get ½MW of electricity from using a small turbine, 48kW of power using thermoelectric systems. Giving an annual income of 150 thousand from. Read https://permies.com/t/25396/Thermal-Electric-Generators
So a simple glass tube, fired up by a pulse of power from a fluorescent light will provide all the heat and power you need from 7x10-22cc of regular water a year.
Oil is losing money – even after price support. We are at $53 a barrel. And no oil producer in the world makes money.So Sheffield University could use the Seedbert effect to generate 120 kW od carbon zero power – and get an income of 180,000 a year for its surplus power.