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/10.2172/5753833· OSTI ID:5753833

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)
• OSTI ID: 5753833
• Report Number(s): SAN-1572-T1
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150802* -- Geothermal Power Plants-- Power Plant Systems & Components
20 FOSSIL-FUELED POWER PLANTS
200102 -- Fossil-Fueled Power Plants-- Power Cycles
COMPARATIVE EVALUATIONS
COOLING TOWERS
ECONOMIC ANALYSIS
ECONOMICS
FLASHED STEAM SYSTEMS
FLOW RATE
FOSSIL-FUEL POWER PLANTS
GEOTHERMAL POWER PLANTS
Geothermal Legacy
HYBRID SYSTEMS
OPTIMIZATION
PERFORMANCE
POWER PLANTS
THERMAL POWER PLANTS
THERMODYNAMICS
TOPPING CYCLES
WATER CHEMISTRY