Patua is a geothermal power project in Hazen, Nevada, combining 48 MW of geothermal generation with 10 MWac of solar capacity. The project is supported by six production wells and eight injection wells.
Resource & Plant
The Patua resource is a low-enthalpy geothermal resource typical of western Nevada and the Basin and Range region. The field produces approximately 9,250 gallons per minute of brine at 290°F.
The plant operates two binary-cycle generating units. Geothermal water is used to vaporize a refrigerant, which drives the turbines to generate electricity. The refrigerant is then condensed using a unique hybrid air-water cooling system to complete the cycle.
The plant’s binary-cycle design is distinct from typical binary geothermal facilities that use hydrocarbons and an Organic Rankine Cycle (ORC).
Field Development
Patua was originally designed for 100 MW of capacity. Historical drilling at the field resulted in less production than originally anticipated.
However, the data recovered from the existing wells, combined with modern analysis techniques, continues to support the potential for additional capacity at Patua.
Resource Performance
Patua has maintained a thermal decline rate of approximately 1.5°F per year through strategic allocation of injection across the field.