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Removal of silica from Raft River geothermal water

Description: Lack of sufficient quantities of clean surface or near-surface water at Raft River for cooling purposes dictates that cooled geothermal fluid, effluent from the Raft River 5 MW(e) Pilot Power Plant, must also be used as condenser coolant. Prior testing revealed that a water-treatment system would be required to reduce silica and calcium concentrations of the cooling fluid. The water-treatment system specified was to use dolomitic lime for both pH adjustment and source of magnesium. The dolomiti… more
Date: June 1, 1980
Creator: Suciu, D. F. & Miller, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparative ranking of 0. 1-10 MW/sub e/ solar thermal electric power systems. Volume II. Supporting data. Final report

Description: This report is part of a two-volume set summarizing the results of a comparative ranking of generic solar thermal concepts designed specifically for electric power generation. The original objective of the study was to project the mid-1990 cost and performance of selected generic solar thermal electric power systems for utility applications and to rank these systems by criteria that reflect their future commercial acceptance. This study considered plants with rated capacities of 1-10 MW/sub e/,… more
Date: July 1, 1980
Creator: Thornton, J.P.; Brown, K.C.; Finegold, J.G.; Gresham, J.B.; Herlevich, F.A. & Kriz, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of solar options for small power systems applications. Volume V. SOLSTEP: a computer model for solar plant system simulations

Description: The simulation code, SOLSTEP, was developed at the Pacific Northwest Laboratory to facilitate the evaluation of proposed designs for solar thermal power plants. It allows the user to analyze the thermodynamic and economic performance of a conceptual design for several field size-storage capacity configurations. This feature makes it possible to study the levelized energy cost of a proposed concept over a range of plant capacity factors. The thermodynamic performance is analyzed on a time step b… more
Date: September 1, 1980
Creator: Bird, S.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of solar options for small power systems applications. Volume IV. Comparative ranking of concepts

Description: A comparative analysis of solar thermal conversion concepts that are potentially suitable for development as small electric power systems (1 to 10 MWe) is presented. Cogeneration and total energy systems were beyond the scope of this study. Seven generic type of collectors, together with associated subsystems for electric power generation, were considered. The collectors can be classified into three categories: (1) two-axis tracking (with compound-curvature reflecting surfaces); (2) one-axis tr… more
Date: July 1, 1980
Creator: Currie, J.W. & Jannol, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of Solar Options for Small Power Systems Applications. Volume III. Analysis of Concepts

Description: A comparative analysis of solar thermal conversion concepts that are potentially suitable for development as small electric power systems (1 to 10 MWe) is given. Seven generic types of collectors, together with associated subsystems for electric power generation, were considered. The collectors can be classified into three categories: (1) two-axis tracking (with compound-curvature reflecting surfaces; (2) one-axis tracking (with single-curvature reflecting suraces; and (3) nontracking (with low… more
Date: September 1, 1980
Creator: Laity, W. W.; Aase, D. T.; Apley, W. J.; Bird, S. P.; Drost, M. K.; Garrett-Price, B. A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New rf power system for SuperHILAC

Description: The upgraded rf system for the SuperHILAC is now operational using 9 new tetrode amplifiers. Each amplifier can produce in excess of 1MW of 70 Mhz pulsed rf power. Ferrite is used to decouple the screen grid circuit and to absorb parasitic oscillations. This results in a very stable amplifier with reasonable gain. This system uses a common 8 MW anode power supply and crowbar system. Overall system efficiency has been increased significantly. We project a 3 year payback on the equipment cost, re… more
Date: May 1, 1985
Creator: Fugitt, J.; Lancaster, H. & Sorensen, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ocean Thermal Energy Conservation (OTEC) power system development (PDS) II. Preliminary design report

Description: This report documents the results and conclusions of the PDS II, Phase I, preliminary design of a 10 MWe OTEC power system, using enhanced plate type heat exchangers, and of representative 0.2 MWe test articles. It further provides the documentation (specifications, drawings, trade studies, etc.) resulting from the design activities. The data and discussions of the technical concepts are organized to respond to the PDS II, Phase II proposal evaluation criteria. This volume, which specifically a… more
Date: August 10, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design and analysis of a 5-MW vertical-fluted-tube condenser for geothermal applications

Description: The design and analysis of an industtial-sized vertical-fluted-tube condenser. The condenser is used to condense superheated isobutane vapor discharged from a power turbine in a geothermal test facility operated for the US Department of Energy. The 5-MW condenser has 1150 coolant tubes in a four-pass configuration with a total heat transfer area of 725 m/sup 2/ (7800 ft/sup 2/). The unit is being tested at the Geothermal Components Test Facility in the Imperial Valley of East Mesa, California. … more
Date: March 1, 1982
Creator: Llewellyn, G.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

5MW Raft River facility experience

Description: The Raft River geothermal plant is a small binary cycle conversion system which uses isobutane as the working fluid. This plant uses a staged boiler concept to achieve better performance than could be obtained by a single boiler. The plant was designed to operate with a geothermal water inlet temperature of 143/sup 0/C (290/sup 0/F) and produce a nominal generator output of 5MW. The plant is supported by a supply and injection system consisting of three supply wells (about 1524m or 5000 ft deep… more
Date: January 1, 1980
Creator: Whitbeck, J.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of solar options for small power systems applications. Volume II. Identification and characterization of concepts for analysis

Description: The primary purpose of this study is to provide DOE with an independent, objective assessment of the principal solar thermal conversion concepts that have the potential for achieving commercial success as small electric power sytems in the 1- to 10-MWe range. Seven generic types of collectors, together with associated subsystems for electric power generation, were considered in this study. The collectors can be classified into three categories: (1) two-axis tracking (with compound curvature ref… more
Date: June 1, 1980
Creator: Laity, W.W.; Aase, D.T.; Apley, W.J.; Bird, S.P.; Drost, M.K. & Williams, T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Pilot Plant project review No. 9, May 4--5, 1977. CDRL item 10

Description: Drawings and illustrations for the project review are presented. These are included for the 10 MW(e) solar pilot plant, the collector subsystem, the receiver subsystem, the electrical power generation system and balance of plant, plant controls and transient analysis, availability and safety, pilot and commercial plant designs, and summary and recommendations. (MHR)
Date: January 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ocean thermal energy conversion (OTEC) power system development (PSD) II. Preliminary design report. Appendix I: specifications and drawings

Description: This volume contains the specifications and drawings prepared in support of the preliminary design of a 10MWe OTEC power system using enhanced plate type heat exchangers. Included are: (1) the specification tree; (2) system specification; (3) 10 MWe heat exchangers; (4) nitrogen storage, conditioning and supply subsystem specification; (5) ammonia storage, conditioning and supply specification; (6) electrical power distribution and control subsystem specification; (7) equipment valves, instrume… more
Date: August 10, 1979
Creator: Pearson, R.O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SDG and E - ERDA Geothermal Loop Experimental Facility. Bi-monthly report, May 1975-August 1976

Description: A description of the Geothermal Loop Experimental Facility (GLEF) its construction problems, and a discussion of start-up testing are included. A history and description of the operation and maintenance with the brine injection pump for the facility are presented. The GLEF was divided into five separate sections: steam and condensate system, brine system, purge water system, vent gas system, and cooling water system. An insight into the chemistry of each system is provided by analysis of sample… more
Date: September 1, 1976
Creator: Bishop, H. K.; Bricarello, J. R.; Campbell, J. A.; Lombard, G. L.; Mulliner, D. K. & Swanson, C. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Semiannual progress report for the Idaho Geothermal Program, October 1, 1979-March 31, 1980

Description: Progress is reported for the Idaho Geothermal program between October 1, 1979 and March 31, 1980. Progress on the 5-MW Pilot Power Plant at the Raft River Geothermal Test Site is summarized including construction, steady-state and transient analyses by computer modeling, the geothermal water treatment program, and additional experimental and theoretical work on direct contact heat exchangers. Asbestos-cement pipe failures in the geothermal fluid supply and injection system are also summarized. … more
Date: July 1, 1980
Creator: Ihrig, R.R. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Pilot Plant, Phase I. Preliminary design report. Volume I. Executive overview (approved). CDRL item 2. [10 MW; Barstow, California]

Description: The project goals, program schedules, and preliminary design for the 10 MW central receiver pilot plant at Barstow, California are presented. Details of the collector field, receiver/tower, thermal storage system, electrical power conversion subsystem, and control systems are given. (WHK)
Date: August 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Raft River condenser-tube examination

Description: In the program of development of a water treatment for the 5 MW Raft River power plants' carbon steel heat rejection system, four carbon steel tubes were analyzed in this batch. The results of visual and scanning electron microscope examination of the tubes are presented. (MHR)
Date: April 3, 1981
Creator: Suciu, D. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design and off-design operation of a dual-boiling binary geothermal power plant

Description: The design of a 5 MW(e) geothermal plant using a binary fluid process is described. The second fluid is isobutane. This plant is presently under construction at Raft River, Idaho. A mathematical simulation of the plant is discussed. The heat exchangers were modeled by dividing them into segments in the direction of flow to permit local adjustments in heat transfer coefficients and fluid properties. Sensitivity of plant performance to geofluid temperature and flow rate, heat exchanger fouling an… more
Date: January 1, 1980
Creator: Bliem, C.J. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Helical Screw Expander Evaluation Project. Final report

Description: A functional 1-MW geothermal electric power plant that featured a helical screw expander was produced and then tested in Utah in 1978 to 1979 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 operat… more
Date: March 1, 1982
Creator: McKay, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Pilot Plant, Phase I. Preliminary design report. Volume III. Collector subsystem. CDRL item 2

Description: The Honeywell collector subsystem features a low-profile, multifaceted heliostat designed to provide high reflectivity and accurate angular and spatial positioning of the redirected solar energy under all conditions of wind load and mirror attitude within the design operational envelope. The heliostats are arranged in a circular field around a cavity receiver on a tower halfway south of the field center. A calibration array mounted on the receiver tower provides capability to measure individual… more
Date: May 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Conceptual design and systems analysis of photovoltaic power systems. Final report. Volume III(2). Technology

Description: Conceptual designs were made and analyses were performed on three types of solar photovoltaic power systems. Included were Residential (1 to 10 kW), Intermediate (0.1 to 10 MW), and Central (50 to 1000 MW) Power Systems to be installed in the 1985 to 2000 time period. The following analyses and simulations are covered: residential power system computer simulations, intermediate power systems computer simulation, central power systems computer simulation, array comparative performance, utility e… more
Date: May 1, 1977
Creator: Pittman, P.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Raft River 5-MW(e) geothermal pilot plant project

Description: The Raft River 5-MW(e) Pilot Plant Project was started in 1976. Construction is scheduled for completion in July 1980, with three years of engineering and operational testing to follow. The plant utilized a 280/sup 0/F geothermal fluid energy source and a dual boiling isobutane cycle. Developmental efforts are in progress in the areas of down hole pumps and chemical treatment of geothermal fluid for cooling tower makeup.
Date: January 1, 1980
Creator: Rasmussen, T.L. & Whitbeck, J.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sperry Low Temperature Geothermal Conversion System, Phase 1 and Phase II. Final report. Volume III. Systems description

Description: The major fraction of hydrothermal resources that have the prospect of being economically useful for the generation of electricity are in the 300/sup 0/F to 425/sup 0/F temperature range. Cost-effective conversion of the geothermal energy to electricity requires the conception and reduction to practice of new ideas to improve conversion efficiency, enhance brine flow, reduce plant costs, increase plant availability, and shorten the time between investment and return. The problems addressed duri… more
Date: January 1, 1984
Creator: Matthews, H.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Conceptual design 10 MW experimental power generation facility

Description: The overall or ultimate program envisions a small (10 MW) field experimental, highly instrumented, binary fluid cycle power plant facility planned to confirm the concept and evaluate technical and economic feasibility of the large scale use of geothermal energy resources. The eight year program duration anticipates four years for exploration and construction, two years for research and development of initial operations, and two years for research and development effort during production operati… more
Date: September 30, 1974
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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