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in subjects: "Usa Geothermal Legacy 150801* -- Geothermal Power Plants-- Design & Operation"  
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Analyses of mixed-hydrocarbon binary thermodynamic cycles for moderate-temperature geothermal resources using regeneration techniques

Description: Studies of basic binary geothermal cycles utilizing mixtures of hydrocarbons have shown better performance than for pure fluids for a moderate temperature (360/sup 0/F) resource. However, a loss is net geofluid effectiveness (watt-hours net plant output/1bm geofluid) results when the geofluid outlet temperature is limited to temperatures in excess of 160/sup 0/F to alleviate a silica precipitation problem. This study examined three working fluids consisting of binary mixtures of hydrocarbons to… more
Date: December 1, 1981
Creator: Demuth, O. J. & Kochan, R. J.
Partner: UNT Libraries Government Documents Department
open access

Quick look report on the startup tests for the Raft River 5-MW(e) pilot geothermal power plant

Description: A preliminary analysis was made of the initial startup data taken between October 20 and November 2, 1981 for the 5 MW(e) Pilot Geothermal Power Plant located at the Raft River Site in southeast Idaho. This plant utilizes a dual-boiling isobutane binary cycle. Two test conditions were selected for analysis: (1) a thermal loop test with 94% of the design geofluid flow, and (2) a test at about three-fourths of the design geofluid flow in which one megawatt was generated from working-fluid flow th… more
Date: December 1, 1981
Creator: Bliem, C.J.
Partner: UNT Libraries Government Documents Department
open access

HGP-A wellhead generator proof-of-feasibility project

Description: The HGP-A Wellhead Generator Proof-of-Feasibility Project consists of a nominal 3 Megawatt geothermal steam turbine electric power generating facility, the first geothermal power plant in Hawaii. The plant is being constructed as a research and development project to evaluate geothermal steam as a viable resource to be considered for larger commercial electric power generating stations in Hawaii. The project facilities include a turbine building, with a contiguous service area for plant operati… more
Date: November 3, 1978
Partner: UNT Libraries Government Documents Department
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Economics of a 75-MW(e) hot-dry-rock geothermal power station based upon the design of the Phase II reservoir at Fenton Hill

Description: Based upon EE-2 and EE-3 drilling costs and the proposed Fenton Hill Phase II reservoir conditions the break-even cost of producing electricity is 4.4 cents per kWh at the bus bar. This cost is based upon a 9-well, 12-reservoir hot dry rock (HDR) system producing 75 MW(e) for 10 yr with only 20% drawdown, and an assumed annual finance charge of 17%. Only one-third of the total, potentially available heat was utilized; potential reuse of wells as well as thermal stress cracking and augmentation … more
Date: February 1, 1982
Creator: Murphy, H.; Drake, R.; Tester, J. & Zyvoloski, G.
Partner: UNT Libraries Government Documents Department
open access

Performance and operability study of the Raft River 5 MW(e) pilot geothermal power plant steady-state behavior

Description: Estimates of the steady-state performance of the Raft River 5 MW(e) Pilot Geothermal Power Plant have been made using an existing digital computer simulation which has been updated to reflect the individual performance of the actual components in the plant. The plant output (gross and net) has been obtained as a function of geothermal fluid inlet temperature and flow rate and isobutane preheater bypass (boiler inlet subcooling). The plant performance has been determined for two ambient conditio… more
Date: November 13, 1979
Creator: Bliem, C.J.
Partner: UNT Libraries Government Documents Department
open access

Raft River binary-cycle geothermal pilot power plant final report

Description: The design and performance of a 5-MW(e) binary-cycle pilot power plant that used a moderate-temperature hydrothermal resource, with isobutane as a working fluid, are examined. Operating problems experienced and solutions found are discussed and recommendations are made for improvements to future power plant designs. The plant and individual systems are analyzed for design specification versus actual performance figures.
Date: April 1, 1983
Creator: Bliem, C.J. & Walrath, L.F.
Partner: UNT Libraries Government Documents Department
open access

Semiannual progress report for the Idaho Geothermal Program, April 1-September 30, 1981

Description: Modifications incorporated in the 5-MW Pilot Power Plant at Raft River Geothermal Test Site, system operational testing and maintenance activities at that plant, and the water treatment program's corrosion studies are summarized. Progress is reported on performance tests of the ORNL condenser and the direct-contact heat exchanger in the Prototype Power Plant. Production-injection tests associated with pump installation in monitor wells at Raft River are reported. Case studies conducted and publ… more
Date: January 1, 1982
Creator: Parker, J.T. (ed.)
Partner: UNT Libraries Government Documents Department
open access

Water for goethermal development in Imperial County. A summarizing report

Description: Information on water issues related to geothermal development is reviewed, including research on local water resources and quality, cooling water requirements for geothermal power plants, and water for geothermal development. Topics of on-going research are noted and questions for future research are posed.
Date: January 1, 1984
Partner: UNT Libraries Government Documents Department
open access

Unalaska geothermal exploration project. Electrical power generation analysis. Final report

Description: The objective of this study was to determine the most cost-effective power cycle for utilizing the Makushin Volcano geothermal resource to generate electricity for the towns of Unalaska and Dutch Harbor. It is anticipated that the geothermal power plant would be intertied with a planned conventional power plant consisting of four 2.5 MW diesel-generators whose commercial operation is due to begin in 1987. Upon its completion in late 1988, the geothermal power plant would primarily fulfill base-… more
Date: April 1, 1984
Partner: UNT Libraries Government Documents Department
open access

GEOTEC (Geothermal-Enhanced Ocean Thermal Energy Conversion) engineering concept study

Description: The project was to provide a conceptual design for a modular state-of-the-art geothermal-enhanced ocean thermal energy conversion (GEOTEC) plant for implementation at a Navy site on Adak Island, Alaska. This report includes the following appendices: (1) statement of work; (2) geothermal resource assessment; (3) assessment of environmental issues; (4) design optimization program formulations for GEOTEC; (5) calculation of geofluid temperature drop in brine collection system; (6) pressure losses … more
Date: March 1, 1984
Partner: UNT Libraries Government Documents Department
open access

Design and operation of a geopressurized-geothermal hybrid cycle power plant

Description: This is an appendix to Volume 1 of the report by the same name. Items included are: process flow diagram; piping and instrumentation diagram; new equipment specifications; main single line diagram; shutdown start-up procedures; data sheets for tests; plant outages; detailed process equations; computer program and sample output; chemical analysis and scanning electron microscopy results; and management report data sheets January 5, 1990 -- May 29, 1990.
Date: February 1, 1991
Creator: Campbell, R. G. & Hattar, M. M.
Partner: UNT Libraries Government Documents Department
open access

Design and operation of a geopressurized-geothermal hybrid cycle power plant

Description: Geopressured-geothermal resources can contribute significantly to the national electricity supply once technical and economic obstacles are overcome. Power plant performance under the harsh conditions of a geopressured resource was unproven, so a demonstration power plant was built and operated on the Pleasant Bayou geopressured resource in Texas. This one megawatt facility provided valuable data over a range of operating conditions. This power plant was a first-of-a-kind demonstration of the h… more
Date: February 1, 1991
Creator: Campbell, R. G. & Hattar, M. M.
Partner: UNT Libraries Government Documents Department
open access

Semiannual progress report for the Idaho Geothermal Program, October 1, 1980 to March 31, 1981

Description: Modifications incorporated in the 5-MW Pilot Power Plant at Raft River Geothermal Test Site, system operational testing and maintenance and activities at that plant, and the water treatment program's corrosion studies are summarized. Progress is reported on performance tests of the ORNL condenser in the Prototype Power Plant, checkout of the direct contact heat exchanger, and modification of that plant. The progress of testing and continuing studies of direct-contact heat exchangers is reported… more
Date: September 1, 1981
Creator: Parker, John T. & Smith, Carla J.
Partner: UNT Libraries Government Documents Department
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