Hybrid electric power generation

A method of electric power generation using a total amount of heat energy, comprising the steps of:

• (a) heating and completely evaporating water to produce dry, saturated steam at a first high temperature and first high pressure with geothermal heat energy from a high temperature geothermal heat source, which geothermal heat energy is more than about seventy percent (70%) of all of said total heat energy used in said method of electric power generation, said high pressure sufficient for effective use in a large scale electric power turbine generator, said energy from said high temperature geothermal heat source is derived from injecting brine from a selected earth surface location into high temperature hot, dry rock for absorbing said heat energy therefrom and returning said brine to said earth surface location and passing it through a counterflow heat exchanger to completely evaporate said water to produce said dry saturated steam at said first high temperature and pressure;
• (b) then superheating said dry saturated steam to produce steam at a second high temperature and at said first high pressure using an amount of heat energy which is less than about 30% of said total amount of heat energy;
• and
• (c) then applying said superheated steam at said high pressure to drive a large scale electric power turbine generator.