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Geothermal energy: feasibility study

Description: A research program initiated to investigate the feasibility of using the geothermal energy available in salt domes to generate electrical power and of using cavities developed in salt domes as high temperature, high pressure chemical reaction vessels for converting municipal wastes to fuel oil or gas is described. Power generation from geothermal was not found to be economically feasible. The conversion of waste to fuel is possible if the problems of cavity collapse can be avoided. (MHR)
Date: February 1, 1976
Creator: Hodgson, E.W. Jr. & Ziegler, R.C.
Partner: UNT Libraries Government Documents Department
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Program to develop improved downhole drilling motors. Semiannual report

Description: The following are described: the history of turbodrill development, positive displacement motor development, the theory of turbodrills, the theory of positive displacement motors, basic motor components, forces on thrust bearings, thrust bearing design, radial bearing design, rotary seal design, sealed lubrication system, lubricants, and project status. Included in appendices are materials on high-temperature lubricants and a progress report on the design of downhole motor seal, bearing, and lubrication test systems. (MHR)
Date: November 1, 1976
Creator: Maurer, W.C.
Partner: UNT Libraries Government Documents Department
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Geohydrological Environmental Effects of Geothermal Power Production, Phase IIA.

Description: The numerical techniques embodied in the fully interactive reservoir simulator (AGRESS) are described; the results of the calculation for the five-spot production/injection pattern are also presented. The analysis of the pressure drawdown and buildup tests for geothermal reservoirs is presented. The effects of in-formation flashing of brines both near a wellbore and at levels above the producing horizon are described. The thermodynamic equation of state package for sodium chloride/water solutions is described. The calculations simulate the production and subsidence history of Wairakei field. Future research plans are outlined. (MHR)
Date: September 1, 1976
Creator: Pritchett, J.W.; Garg, S.K.; Brownell, D.H. Jr.; Rice, L.F.; Rice, M.H.; Riney, T.D. et al.
Partner: UNT Libraries Government Documents Department
open access

Plant Research '76

Description: Overall objective remains unchanged: to contribute to the knowledge, with strong emphasis on fundamental problems, of how plants function, the roles they play in the environment and energy relations of the world, and how these roles may be optimized for the benefit of mankind. (PCS)
Date: January 1, 1976
Partner: UNT Libraries Government Documents Department
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Regional operations research for geothermal development in the state of California

Description: A system of regional operations research activities is described which will formulate potential future development scenarios for geothermal energy and identify the public initiatives necessary for that potential. The specifics of the work plan for the state of California are outlined along with the project management structure and reporting schedules. (MHR)
Date: April 14, 1976
Partner: UNT Libraries Government Documents Department
open access

Biochemical Technology Program progress report for the period January 1--June 30, 1976. [Centrifugal analyzers and advanced analytical systems for blood and body fluids]

Description: This document, which covers the period January 1-June 30, 1976, describes progress in the following areas: (1) advanced analytical techniques for the clinical laboratory, (2) fast clinical analyzers, (3) development of a miniaturized analytical clinical laboratory system, (4) centrifugal fast analyzers for animal toxicological studies, and (5) chemical profile of body fluids.
Date: September 1, 1976
Creator: Mrochek, J.E.; Burtis, C.A. & Scott, C.D. (comps.) comps.
Partner: UNT Libraries Government Documents Department
open access

GRAY: a program to calculate gray-body radiation heat-transfer view factors from black-body view factors

Description: Program GRAY is written to perform the matrix manipulations necessary to convert black-body radiation heat-transfer view factors to gray-body view factors as required by thermal analyzer codes. The black-body view factors contain only geometric relationships. Program GRAY allows the effects of multiple gray-body reflections to be included. The resulting effective gray-body factors can then be used with the corresponding fourth-power temperature differences to obtain the net radiative heat flux. The program is written to accept a matrix input or the card image output generated by the black-body view factor program CNVUFAC. The resulting card image output generated by GRAY is in a form usable by the TRUMP thermal analyzer.
Date: June 14, 1976
Creator: Wong, R. L.
Partner: UNT Libraries Government Documents Department
open access

Geothermal down-well pumping system. Final report

Description: A novel method of pumping geothermal hot brines is described. A discussion of the reasons for pumping and a description of the system is reported. The results of the turbopump laboratory tests are documented. The design, construction, and test of a higher flow-rate pump impeller and first-stage diffuser; detailed design improvements in the TPU and continued endurance testing of it; and preliminary planning tasks for the subsequent down-well testing program are covered. (MHR)
Date: August 16, 1976
Partner: UNT Libraries Government Documents Department
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Preliminary investigation of user requirements for solar radiation data. Final report

Description: The intent of this study is to: (1) make a preliminary assessment of the accuracy and precision of insolation data with respect to user requirements, and (2) make a corresponding assessment of the minimum/maximum geographic network coverage. In order to make these preliminary assessments, several specific questions have been addressed. Specifically: (1) how should users of solar radiation be classified and what principal uses of the data are made by each class, (2) what temporal and spatial properties of the data network are required to adequately serve the defined uses and users of solar radiation data, (3) to what degree does the existing network and associated data fulfill the desired data system properties, and (4) what criteria should be applied in identifying and evaluating expanded network/data options. The findings and conclusions of investigation of these questions are presented.
Date: October 29, 1976
Creator: Hamilton, C.W. & Thomas, R.E.
Partner: UNT Libraries Government Documents Department
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S/sup 3/ Financial Projection Model: preliminary user's manual and system overview

Description: The S/sup 3/ Financial Projection Model is an effort undertaken to construct a pipeline economic model in order to satisfy the requirements of the US ERDA program: Energy Study of Pipeline Transportation System. A brief outline of this process is described in Appendix A, Background on the S/sup 3/ Development of a Pipeline Economic Model. A general overview of the model is presented first to indicate the rationale underlying the model and to show the linkages between the various submodels. An understanding of the basic accounting definitions and self-evident relationships between line items in the general financial accounting reports is a prerequisite for the effective application of the model. Particular attention has been paid in this system description to defining the methods of calculations utilized by the model and to describing the optional capital investment planning techniques that may be exercised with the model. The mathematical relationships underlying various planning techniques are defined and the methods for applying these techniques are discussed with illustrations and sample input data specifications. Decision tables are used to show complex decision rules applied within the model to determine the logical flow of a particular computational routine. The complete set of source data and model options are described along with the procedures for input data preparation and actual program operation.
Date: November 30, 1976
Creator: Masso, J. F.
Partner: UNT Libraries Government Documents Department
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Dipole-dipole resistivity delineation of the near-surface zone at the Roosevelt Hot Springs KGRA. Technical report. Volume 76-1

Description: Recent dipole-dipole resistivity surveys using 100 m and 300 m dipoles at Roosevelt Hot Springs KGRA, near Milford, Utah have suggested that the north-south length of the convective hydrothermal system may be as great as 20 km. Tertiary granite of the Mineral Mountain pluton seems to be intensely fractured along a narrow (500 m.) sinuous zone trending north and coinciding in part with the Dome Fault. This north-south fracture zone is crosscut by numerous east-west and some northwest-southeast faults. The brine in the fractures and alternation of feldspars to clay both result in lowered resistivities. Leakage of brine westward from the Dome Fault fracture zone is still a realistic interpretation of low resistivity values several kilometers west of the Dome Fault.
Date: November 1, 1976
Creator: Ward, S.H. & Sill, W.R.
Partner: UNT Libraries Government Documents Department
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Electrokinetic Consolidation of Slimes in an Underground Mine

Description: Report issued by the Bureau of Mines over tests conducted on underground mine slimes from a collection sump. Testing methods and results are discussed. This report includes tables, illustrations, and photographs.
Date: 1976
Creator: Sprute, R. H. & Kelsh, D. J.
Partner: UNT Libraries Government Documents Department
open access

Study of practical cycles for geothermal power plants. Interim report, June 15, 1975-March 31, 1976

Description: The preliminary analysis is described in a study of practical cycles for geothermal power plants. The analysis is based on three different brines whose temperatures and composition span the range that is of practical interest for power generation. Only two kinds of cycles were considered in the analysis - the steam turbine cycle and the binary cycle, in which energy from the geothermal fluid is transferred to a secondary working fluid in a closed Rankine cycle. The performance of several condidate working fluids has been investigated, and the most attracive binary cycles have been selected for the various resource conditions. The results show that if brine is utilized directly in the primary heat exchange process with the secondary working fluid, the binary cycle is potentially better in terms of resource utilization than a dual flash steam turbine cycle. However, if the brine is flashed to steam and the steam is used for the heat exchange process, the steam turbine cycle will produce more power per pound of brine flow. Preliminary turbine designs have been formulated for steam and also for the most promising working fluids in the secondary or binary cycle. For all cycle configurations at least 50 MW of electrical power can be generated by a single unit without exceeding mechanical design or manufacturing limitations even when the resource temperature is as low as 400/sup 0/F. Plant economics were not considered.
Date: April 1, 1976
Creator: Eskesen, J.H.
Partner: UNT Libraries Government Documents Department
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Hawaii Geothermal Project initial Phase II progress report, February 1976

Description: Additional gravity, seismic, and electrical surveys were conducted; water and rock samples were collected; and analysis and interpretation of data has proceeded. The engineering program has expanded its earlier work on mathematical and physical modeling of geothermal reservoirs; continued with the analysis of liquid-dominated geothermal systems; and initiated studies on geothermal well testing. An environmental assessment statement of HGP No. 1 was prepared and baselines established for crucial environmental parameters. Economic, legal, and regulatory studies were completed and alternatives identified for the development of geothermal power in Hawaii. The Drilling Program has provided assistance in contract negotiations, preparation of the drilling and testing programs, and scientific input to the drilling operation. (MHR)
Date: February 1, 1976
Partner: UNT Libraries Government Documents Department
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Thermodynamic model of the hydrolysis of microcline in acid-sulfate solutions

Description: A theoretical model of the hydrolysis of microcline by a hydrothermal solution has been determined for a closed system at constant temperature. Hypothetical solution compositions and temperatures were chosen to match the known geothermal system at Roosevelt Hot Springs, Utah. The calculated reaction paths indicate that the overall reaction process is an exchange of potassium from the reactant mineral, microcline, for hydrogen from the solution. Aluminum is nearly conserved among solid phases. The amount of microcline reacted per kilogram of solution before overall equilibrium is reached is a function of temperature and inituial solution pH. Since the system is closed and at constant temperature natural conditions are not reproduced well enough to apply the model as a geothermometer. The reaction paths suggest qualitative models of alteration mineral zoning patterns that are similar to zoning at Roosevelt Hot Springs, Utah; Steamboat Springs, Nevada, and Butte, Montana. The models presented view alteration zoning as a function of temperature and pH gradients within homogeneous host rocks where microcline and quartz are abundant.
Date: December 1, 1976
Creator: Dedolph, R.E. & Parry, W.T.
Partner: UNT Libraries Government Documents Department
open access

Food Information Systems

Description: Transcriptions of statements made over the course of four days regarding the food information systems in the United States.
Date: February 1976
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
open access

Food Information Systems: Summary and Analysis

Description: A study done by the Office of Technology Assessment (OTA) intended to "review food information systems in order to isolate and evaluate those significant to the development of food legislation and related congressional policymaking" (p. xi).
Date: August 1976
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
open access

Phase 1 report: investigation of geothermal energy information sources

Description: A subject screening list was developed which would be used by acquisitions specialists as a guide to the orientation of pertinent literature. The subject screening list was derived primarily from the geothermal subset of the ERDA Energy Thesaurus and from the ERDA Energy Information Data Base Subject Categories (TID-4584). The subject screening list is included. Subsequent to preparation of the subject screening list, a core list of serial publications containing geothermal energy information was generated by SIS library scientists. This list was corelated with the ERDA-TIC serial publications list. Included in both lists is an estimate of the annual geothermal information yield of the serial sources. A listing of sources of geothermal energy information other than serial publications and the conclusions, including methods of acquisitioning to be utilized and the estimated annual volume of information from all sources are presented.
Date: July 14, 1976
Partner: UNT Libraries Government Documents Department
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Steady-state and transient wellbore temperatures during drilling

Description: An extensive literature search was made to locate technical publications and computer programs relating to wellbore temperatures during drilling operations. Publications obtained are listed in the References. Two approaches were used in calculating borehole temperatures: The steady state solution of Holmes and Swift was programmed and 2100 cases calculated for various borehole configurations. For transient temperature studies, Exxon Production Research Co. made calculations for ten borehole configurations under subcontract. These calculations emphasize the need for better high temperature bit performance and improved engineering procedures in drilling.
Date: May 20, 1976
Creator: McDonald, W.J.
Partner: UNT Libraries Government Documents Department
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An Assessment of Alternative Economic Stockpiling Policies

Description: A report by the Office of Technology Assessment (OTA) that focuses on analyzing the "materials problems related to sudden discontinuities in the long-range supply/demand of a given material, resulting in complete or partial disruptions and abrupt price changes" (p. vii).
Date: August 1976
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
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