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Helical screw expander evaluation projectA one MW helical rotary screw expander power system for electric power generation from geothermal brine was evaluated. The technology explored in the testing is simple, potentially very efficient, and ideally suited to wellhead installations in moderate to high enthalpy, liquid dominated field. A functional one MW geothermal electric power plant that featured a helical screw expander was produced and then tested with a demonstrated average performance of approximately 45% machine efficiency over a wide range of test conditions in noncondensing, operation on two-phase geothermal fluids. The Project also produced a computer equipped data system, an instrumentation and control van, and a 1000 kW variable load bank, all integrated into a test array designed for operation at a variety of remote test sites. Data are presented for the Utah testing and for the noncondensing phases of the testing in Mexico. Test time logged was 437 hours during the Utah tests and 1101 hours during the Mexico tests.
Document ID
19820014785
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Mckay, R. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
September 4, 2013
Publication Date
March 1, 1982
Subject Category
Energy Production And Conversion
Report/Patent Number
JPL-PUB-82-5
NAS 1.26:168803
DOE/ET-28329/1
NASA-CR-168803
Accession Number
82N22659
Funding Number(s)
PROJECT: RTOP 779-00-00
CONTRACT_GRANT: NAS7-100
CONTRACT_GRANT: EX-71-1-01-1000
CONTRACT_GRANT: DE-AI01-76ET-28329
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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