Patent ID: 8266908

Claim:
A method for efficiently operating a multi-heat source power plant using geothermal fluid, wherein the geothermal fluid is a liquid or brine, wherein said multi-heat source power plant includes an organic vapor turbine run by an organic motive fluid, comprising the steps of: pre-heating said organic motive fluid using a geothermal liquid or brine having a temperature less than the boiling temperature of the organic motive fluid, to raise the temperature of the organic motive fluid to less than the boiling temperature of the organic motive fluid; and thereafter providing further heat from a concentrated solar energy source, to boil the organic motive fluid by heat exchange with a thermal oil which is heated by said concentrated solar energy, without input of heat from the geothermal liquid or brine, and produce organic motive fluid vapor at substantially constant temperature; supplying the organic motive fluid vapor produced at substantially constant temperature to said organic vapor turbine.