High geothermal energy utilization geothermal/fossil hybrid power cycle: a preliminary investigation

Technical Report · Wed Nov 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6951015· OSTI ID:6951015

Grijalva, R L; Sanemitsu, S K

Combining geothermal and fossil fuel energy into the so-called hybrid cycle is compared with a state-of-the-art double-flash geothermal power cycle using resources which vary from 429/sup 0/K (312/sup 0/F) to 588/sup 0/K (598/sup 0/F). It is demonstrated that a hybrid plant can compete thermodynamically with the combined output from both a fossil-fired and a geothermal plant operating separately. Economic comparison of the hybrid and double-flash cycles is outlined, and results are presented that indicate the performance of marginal hydrothermal resources may be improved enough to compete with existing power cycles on a cost basis. It is also concluded that on a site-specific basis a hybrid cycle is capable of complementing double-flash cycles at large-capacity resources, and can operate in a cycling load mode at constant geothermal fluid flow rate.

• Research Organization: Burbank City Public Service Dept., CA (USA)
• DOE Contract Number: FG03-77ET28425
• OSTI ID: 6951015
• Report Number(s): DOE/ET/28425-T1; ON: DE82021365
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150801* -- Geothermal Power Plants-- Design & Operation
CAPITALIZED COST
CHEMISTRY
COST
FLUIDS
FOSSIL-FUEL POWER PLANTS
GEOTHERMAL FLUIDS
GEOTHERMAL POWER PLANTS
Geothermal Legacy
HYBRID SYSTEMS
OPTIMIZATION
PERFORMANCE
POWER PLANTS
THERMAL POWER PLANTS
THERMODYNAMICS
WATER CHEMISTRY