239 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Brayton Cycle"  
prev Results: 193 - 216 next
open access

Preliminary evaluation of the mini-BRU turbine plenum in superalloy and the currently available heat exchanger for the BIPS workhorse system

Description: The Mini-BRU turbine plenum and nozzle assembly in superalloy and the currently available L.A. heat exchanger have been examined for the BIPS workhorse system. Waspaloy can be used as the material of construction for the plenum and nozzle assembly. The L.A. heat exchanger can be utilized in the workhorse system with recommended modification.
Date: May 11, 1976
Creator: Yang, S. J.
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
open access

Evaluation of technical feasibility of closed-cycle non-equilibrium MHD power generation with direct coal firing. Final report, Task I

Description: Program accomplishments in a continuing effort to demonstrate the feasibility of direct coal-fired, closed-cycle MHD power generation are reported. This volume contains the following appendices: (A) user's manual for 2-dimensional MHD generator code (2DEM); (B) performance estimates for a nominal 30 MW argon segmented heater; (C) the feedwater cooled Brayton cycle; (D) application of CCMHD in an industrial cogeneration environment; (E) preliminary design for shell and tube primary heat exchange… more
Date: November 1, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mini-Brayton economic RTG study. Final report

Description: The objective of this study is to demonstrate the applicability of a radioisotope heated Mini-Brayton power system to the 1973 USAF/AEC requirements established for the SURVSATCOM Mission. The principal requiremenets of the power system, are: 400 We power level; maximum weight 205 lbs.; $1.2 to 2.0 million per unit cost; and 5y mission duration. A radioisotope heat source that meets the ACE Nuclear Safety Criteria is presented. The major aspects of the Reference Design MB-ERTG are summarized. T… more
Date: January 1, 1974
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 I. Executive summary

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. 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 surfaces), and (3) nontracking (w… more
Date: September 1, 1979
Creator: Laity, W. W.; Aase, D. T.; Apley, W. J.; Bird, S. P.; Currie, J. W.; Drost, M. K. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SPR-9 concept definition study: FY 1986 summary

Description: This report summarizes the results of work undertaken to advance design of the SPR-9 MMW power reactor. Gas-cooled thermal reactors coupled with Brayton cycle power conversion appear feasible and have several attractive features for multi-megawatt space power systems. The high temperature capability of the reactor removes it as the limiting component on system performance. The low fuel inventories required make systems based on thermal reactors a lesser safeguard risk. However, an advanced radi… more
Date: October 7, 1986
Creator: Walter, C.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary design review document application of multi-foil insulation to the Brayton Isotope Power System and conceptual design of multi-foil insulation for the flight system (phase I)

Description: The status of the effort to apply MULTI-FOIL thermal insulation in an effective manner to the Ground Development System (GDS) is reviewed. Heat loss measurements made on cylindrical and elbow heat sources using ''Tape'' and ''Conventional'' MULTI-FOIL indicate that the thermal losses are comparable on a per layer basis. However, use of the tape incurs a weight penalty, per layer, of about 20 percent. The effective thermal emissivity of the nickel layer/zirconia powder MULTI-FOIL is approximatel… more
Date: June 11, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Choice of working fluid and operating conditions for energy conversion with geothermal heat sources

Description: A study of electric power generating cycles which can be used in conjunction with a low-temperature geothermal energy (sensible heat) source is presented. Investigators at Los Alamos Scientific Laboratory have proposed a steam/isobutane dual cycle capable of generating 50.7 Mw of electric power. This cycle is optimized using regenerative feed water heating to yield a power output of 52.1 Mw or an improvement of 2.8%. Other power cycle designs and working fluids are investigated. Working fluids … more
Date: October 23, 1973
Creator: Landgraf, K. R.; Kudrnac, K. I. & Solares, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Commercial applications of solar total energy systems. Second quarterly progress report, August 1, 1976--October 31, 1976

Description: This report investigates the application of the Solar Total Energy System (STES) to the commercial sector (e.g., office buildings, shopping centers, retail stores, etc.) in the United States. Candidate solar thermal and solar photovoltaic concepts are considered for providing on-site electrical power generation as well as thermal energy for both heating and cooling applications. The solar thermal concepts include the use of solar concentrators (distributed or central receiver) for collection of… more
Date: April 25, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Alternative non-CFC mobile air conditioning

Description: Concern about the destruction of the global environment by chlorofluorocarbon (CFC) fluids has become an impetus in the search for alternative, non-CFC refrigerants and cooling methods for mobile air conditioning (MAC). While some alternative refrigerants have been identified, they are not considered a lasting solution because of their high global warming potential, which could result in their eventual phaseout. In view of this dilemma, environmentally acceptable alternative cooling methods hav… more
Date: September 1, 1992
Creator: Mei, V. C.; Chen, F. C. & Kyle, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment and development of an advanced heat pump for recovery of volatile organic compounds

Description: This report documents Phase 1 of a project conducted by Mechanical Technology Incorporated (MTI) for the assessment and development of an advanced heat pump for recovery of VOC solvents from process gas streams. In Phase 1, MTI has evaluated solvent recovery applications within New York State (NYS), identified host sites willing to implement their application, and conducted a preliminary design of the equipment required. The design and applications were evaluated for technical and economic feas… more
Date: June 1, 1992
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
open access

Annual technical report: fiscal year 1981

Description: The activities of the JPL Solar Thermal Power Systems Parabolic Dish Project are summarized for FY 1981. Included are discussions on subsystem designs of concentrators, receivers, engines, power converters, and thermal transport. Analyses and test results are also included along with progress on field tests, Small Community System development and the Parabolic Dish Test Site.
Date: March 15, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of nuclear energy for bimodal applications in space

Description: The versatile bimodal nuclear reactor is proposed for producing space station-keeping power of 100's kW and also capable of bursts of power by ramping to 100's MW for short times to operate high power magnetic systems. The particle bed reactor, using half-millimeter diameter fuel particles immersed in coolant, provides the heat transfer capability needed for this power level. The coolant is a gas when directly coupled to a Brayton Cycle and is particularly responsive. The reactor design uses 37… more
Date: January 1, 1986
Creator: Horn, F. L.; Powell, J. R. & Ludewig, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Models for Multimegawatt Space Power Systems

Description: This report describes models for multimegawatt, space power systems which Sandia's Advanced Power Systems Division has constructed to help evaluate space power systems for SDI's Space Power Office. Five system models and models for associated components are presented for both open (power system waste products are exhausted into space) and closed (no waste products) systems: open, burst mode, hydrogen cooled nuclear reactor -- turboalternator system; open, hydrogen-oxygen combustion turboalterna… more
Date: June 1, 1990
Creator: Edenburn, M.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Testing of bellows for engineering systems. Part 1. [For Brayton Isotope Power System]

Description: Bellows made of Hastelloy X and Type 347 stainless steel will be used in the Brayton Isotope Power System (BIPS). Development of this system will involve the Work Horse Loop (WHL) and the Ground Demonstration System (GDS). The primary function of these bellows is to accommodate relative movement of parts of the system, which results from differential temperatures. Methods for performing several types of tests on metal bellows have been developed. Three Hastelloy X bellows were subjected to low-… more
Date: July 1, 1979
Creator: McCoy, H. E. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar-powered irrigation systems. Technical progress report, July 1977--January 1978

Description: Dispersed solar thermal power systems applied to farm irrigation energy needs are analyzed. The 17 western states, containing 84% of nationwide irrigated croplands and consuming 93% of nationwide irrigation energy, have been selected to determine were solar irrigation systems can compete most favorably with conventional energy sources. Financial analysis of farms, according to size and ownership, was accomplished to permit realistic comparative analyses of system lifetime costs. Market potentia… more
Date: February 28, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance prediction evaluation of ceramic materials in point-focusing solar receivers

Description: A Performance Prediction Model was adapted to evaluate the use of ceramic materials in solar receivers for point-focusing distributed applications. TPS system requirements were determined including the receiver operating environment (such as concentrator performance and environment/natural occurrences) and system operating parameters for various engine types. Preliminary receiver designs evolve from these system requirements. Specific receiver designs evaluated in this report to determine mater… more
Date: June 1, 1979
Creator: Ewing, J. & Zwissler, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Status of high-temperature heat-pipe technology. [Performance studies using HTPIPE computer code]

Description: This paper discusses the application of heat pipes to nuclear reactor space power systems. Characteristics of the device that favor such an application are described and recent results of current technology development programs are presented. Research areas that will need to be addressed in demonstrating that adequate lifetimes can be achieved with evaporation/condensation cycles operating at high temperatures in a reactor environment are also discussed.
Date: January 1, 1982
Creator: Ranken, W.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Microtube Strip Heat Exchanger

Description: Doty Scientific (DSI) believes their Microtube-Strip Heat Exchanger will contribute significantly to (a) the closed Brayton cycles being pursued at MIT, NASA, and elsewhere; (b) reverse Brayton cycle cryocoolers, currently being investigated by NASA for space missions, being applied to MRI superconducting magnets; and (c) high-efficiency cryogenic gas separation schemes for CO{sub 2} removal from exhaust stacks. The goal of this current study is to show the potential for substantial progress in… more
Date: December 27, 1990
Creator: Doty, F. David
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Summary of space nuclear reactor power systems, 1983--1992

Description: This report summarizes major developments in the last ten years which have greatly expanded the space nuclear reactor power systems technology base. In the SP-100 program, after a competition between liquid-metal, gas-cooled, thermionic, and heat pipe reactors integrated with various combinations of thermoelectric thermionic, Brayton, Rankine, and Stirling energy conversion systems, three concepts:were selected for further evaluation. In 1985, the high-temperature (1,350 K), lithium-cooled reac… more
Date: August 11, 1993
Creator: Buden, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multimegawatt space power reactors

Description: In response to the need of the Strategic Defense Initiative (SDI) and long range space exploration and extra-terrestrial basing by the National Air and Space Administration (NASA), concepts for nuclear power systems in the multi-megawatt levels are being designed and evaluated. The requirements for these power systems are being driven primarily by the need to minimize weight and maximize safety and reliability. This paper will discuss the present requirements for space based advanced power syst… more
Date: January 1, 1989
Creator: Dearien, J. A. & Whitbeck, J. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Zirconia-foil compatibility test. Phase I. [Thermal insulation for Brayton isotope power system (BIPS)]

Description: The objective of the tests was to characterize the compatibility of zirconia powder with candidate foil materials for application to the Brayton Isotope Power System (BIPS). Recent MULTI-FOIL meltdown experiments and compatibility tests indicate that the current foil material choices for the BIPS should be reconsidered. Specifically, the items of concern are: (1) higher than anticipated rate of nickel vaporization, (2) compatibility of the zirconia coating with nickel above 600/sup 0/C, and (3)… more
Date: October 1, 1976
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assessment of ceramic composites for multimegawatt space nuclear power systems

Description: A calculational thermodynamic equilibrium analysis of the compatibility of ceramic-ceramic composites and a nonequilibrium assessment based on the literature of their use in proposed multimegawatt space nuclear power systems was performed. The five candidate composites included Al/sub 2/O/sub 3/-reinforced Al/sub 2/O/sub 3/, SiC-whisker-toughened Al/sub 2/O/sub 3/, SiC-whisker-toughened Si/sub 3/N/sub 4/, SiC-fiber-reinforced ZrC, and carbon-fiber-reinforced ZrC. The reactor concepts included B… more
Date: December 1, 1986
Creator: Besmann, T.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen