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Comparison of geothermal power conversion cyclesGeothermal power conversion cycles are compared with respect to recovery of the available wellhead power. The cycles compared are flash steam, in which steam turbines are driven by steam separated from one or more flash stages; binary, in which heat is transferred from the brine to an organic turbine cycle; flash binary, in which heat is transferred from flashed steam to an organic turbine cycle; and dual steam, in which two-phase expanders are driven by the flashing steam-brine mixture and steam turbines by the separated steam. Expander efficiencies assumed are 0.7 for steam turbines, 0.8 for organic turbines, and 0.6 for two-phase expanders. The fraction of available wellhead power delivered by each cycle is found to be about the same at all brine temperatures: 0.65 with one stage and 0.7 with four stages for dual stream; 0.4 with one stage and 0.6 with four stages for flash steam; 0.5 for binary; and 0.3 with one stage and 0.5 with four stages for flash binary.
Document ID
19770029898
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Elliott, D. G.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Energy Production And Conversion
Meeting Information
Meeting: Conference on Intersociety Energy Conversion Engineering
Location: State Line, NV
Start Date: September 12, 1976
End Date: September 17, 1976
Accession Number
77A12750
Funding Number(s)
CONTRACT_GRANT: AT(04-03)-1086
Distribution Limits
Public
Copyright
Other

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