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Performance And Operational Characteristics For A Dual Brayton Space Power System With Common Gas Inventory
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721831340 Total Pages :30 pages Book Rating :4.8/5 (313 download)
Book Synopsis Performance and Operational Characteristics for a Dual Brayton Space Power System with Common Gas Inventory by : National Aeronautics and Space Administration (NASA)
Download or read book Performance and Operational Characteristics for a Dual Brayton Space Power System with Common Gas Inventory written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-24 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides an analytical evaluation on the operation and performance of a dual Brayton common gas system. The NASA Glenn Research Center in-house computer program Closed Cycle System Simulation (CCSS) was used to construct a model of two identical 50 kWe-class recuperated closed-Brayton-cycle (CBC) power conversion units that share a common gas inventory and single heat source. As operating conditions for each CBC change, the total gas inventory is redistributed between the two units and overall system performance is affected. Several steady-state off-design operating points were analyzed by varying turbine inlet temperature and turbo-alternator shaft rotational speed to investigate the interaction of the two units. Johnson, Paul K. and Mason, Lee S. Glenn Research Center NASA/TM-2006-214393, E-15671, AIAA Paper-2006-4167
Book Synopsis Performance and Operational Characteristics for a Dual Brayton Space Power System with Common Gas Inventory by : Paul K. Johnson
Download or read book Performance and Operational Characteristics for a Dual Brayton Space Power System with Common Gas Inventory written by Paul K. Johnson and published by . This book was released on 2006 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Steady-state Analysis of a Brayton Space-power System by : John L. Klann
Download or read book Steady-state Analysis of a Brayton Space-power System written by John L. Klann and published by . This book was released on 1970 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of a Brayton Power System with a Space Type Radiator by : Ralph C. Nussle
Download or read book Performance of a Brayton Power System with a Space Type Radiator written by Ralph C. Nussle and published by . This book was released on 1974 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Summary of Brayton Cycle Analytical Studies for Space-power System Applications by : Arthur J. Glassman
Download or read book Summary of Brayton Cycle Analytical Studies for Space-power System Applications written by Arthur J. Glassman and published by . This book was released on 1964 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721789665 Total Pages :36 pages Book Rating :4.7/5 (896 download)
Book Synopsis Design and Off-Design Performance of 100 Kwe-Class Brayton Power Conversion Systems by : National Aeronautics and Space Administration (NASA)
Download or read book Design and Off-Design Performance of 100 Kwe-Class Brayton Power Conversion Systems written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-24 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Glenn Research Center in-house computer model Closed Cycle Engine Program (CCEP) was used to explore the design trade space and off-design performance characteristics of 100 kWe-class recuperated Closed Brayton Cycle (CBC) power conversion systems. Input variables for a potential design point included the number of operating units (1, 2, 4), cycle peak pressure (0.5, 1, 2 MPa), and turbo-alternator shaft speed (30, 45, 60 kRPM). The design point analysis assumed a fixed turbine inlet temperature (1150 K), compressor inlet temperature (400 K), helium-xenon working-fluid molecular weight (40 g/mol), compressor pressure ratio (2.0), recuperator effectiveness (0.95), and a Sodium-Potassium (NaK) pumped-loop radiator. The design point options were compared on the basis of thermal input power, radiator area, and mass. For a nominal design point with defined Brayton components and radiator area, off-design cases were examined by reducing turbine inlet temperature (as low as 900 K), reducing shaft speed (as low as 50 percent of nominal), and circulating a percentage (up to 20 percent) of the compressor exit flow back to the gas cooler. The off-design examination sought approaches to reduce thermal input power without freezing the radiator. Johnson, Paul K. and Mason, Lee S. Glenn Research Center NASA/TM-2005-213626, E-15110
Book Synopsis Gas-injection-start and Shutdown Characteristics of a 2- to 15-kilowatt Brayton Power System by : Dennis A. Cantoni
Download or read book Gas-injection-start and Shutdown Characteristics of a 2- to 15-kilowatt Brayton Power System written by Dennis A. Cantoni and published by . This book was released on 1972 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two methods of starting the Brayton power system have been considered: using the alternator as a motor to spin the Brayton rotating unit (BRU), and spinning the BRU by forced gas injection. The first method requires the use of an auxiliary electrical power source. An alternating voltage is applied to the terminals of the alternator to drive it as an induction motor. This starting method has been reported in the literature; only gas-injection starts are discussed in this report. The gas-injection starting method requires high-pressure gas storage and valves to route the gas flow to provide correct BRU rotation. An analog computer simulation was used to size hardware and to determine safe start and shutdown procedures. The simulation was also used to define the range of conditions for successful startups. Experimental data were also obtained under various test conditions. These data verify the validity of the start and shutdown procedures.
Book Synopsis Space Power Systems Engineering by : George C. Szego
Download or read book Space Power Systems Engineering written by George C. Szego and published by Elsevier. This book was released on 2014-07-10 with total page 1323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space Power Systems Engineering is a collection of papers dealing with the requirements for space power systems, system design, component research, the problems of application to spacecraft, and the development of a variety of space electric power systems. Some papers discuss nuclear power systems development, including nuclear reactors, nuclear dynamic systems, nuclear thermoelectric systems, and nuclear thermionic systems. Several papers tackle solar systems development, including solar collectors, solar dynamic systems, solar thermoelectric systems, chemical fuel cell systems, and chemical primary battery systems. A magnetohydrodynamic power system can be utilized for space electric generation. Power conversion or conditioning involves the interface between raw electric power and the on-board consumption of that electric power. One paper cites an application of a potential power system: particularly the engine development in a power package which includes a single-cylinder engine, generator, gas compressor, and recuperator. Some design considerations for the engine include an operation with an 0-H mixture of 2 to 1 obtained either from supercritical tankage or in the form of helium-diluted boil-off gases; a power level of 2-kw average, 3-kw maximum; and an uninterrupted life of 350 hr. The collection can prove immensely beneficial for nuclear engineers, aeronautical engineers, chemists, researchers, or technical designers whose works are related with energy conversion and space power systems.
Book Synopsis Analysis of Radiator Characteristics of a Single-loop 100-kilowatt Brayton Space Power System Using a Pure Gas and a Gas-solid Suspension by : Robert Pfeffer
Download or read book Analysis of Radiator Characteristics of a Single-loop 100-kilowatt Brayton Space Power System Using a Pure Gas and a Gas-solid Suspension written by Robert Pfeffer and published by . This book was released on 1968 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Predictability of Brayton Electric Power System Performance by : John L. Klann
Download or read book Predictability of Brayton Electric Power System Performance written by John L. Klann and published by . This book was released on 1972 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data from the first tests of the 2- to 15-kilowatt space power system in a vacuum chamber were compared with predictions of both a pretest analysis and a modified version of that analysis. The pretest analysis predicted test results with differences of no more than 9 percent of the largest measured value for each quantity. The modified analysis correlated measurements. Differences in conversion efficiency and power output were no greater than plus or minus 2.5 percent. This modified analysis was used to project space performance maps for the current test system.
Book Synopsis Numerical comparison of NASA's dual Brayton power generation system performance using CO2 or N2 as the working fluid by : Albert K. Owen
Download or read book Numerical comparison of NASA's dual Brayton power generation system performance using CO2 or N2 as the working fluid written by Albert K. Owen and published by . This book was released on 2010 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Control and Startup Considerations for Two-spool Solar-Brayton Power System by :
Download or read book Control and Startup Considerations for Two-spool Solar-Brayton Power System written by and published by . This book was released on 1966 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Operating Characteristics of the Primary Flow Loop of a Conceptual Nuclear Brayton Space Powerplant by :
Download or read book Operating Characteristics of the Primary Flow Loop of a Conceptual Nuclear Brayton Space Powerplant written by and published by . This book was released on 1971 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance and Mass Modeling Subtleties in Closed-Brayton-cycle Space Power Systems by : Michael J. Barrett
Download or read book Performance and Mass Modeling Subtleties in Closed-Brayton-cycle Space Power Systems written by Michael J. Barrett and published by . This book was released on 2005 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance estimates for the space station power system Brayton Cycle compressor and turbine by : Robert L. Cummings
Download or read book Performance estimates for the space station power system Brayton Cycle compressor and turbine written by Robert L. Cummings and published by . This book was released on 1989 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Systems Analyses of Advanced Brayton Cycles by :
Download or read book Systems Analyses of Advanced Brayton Cycles written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective is to identify and assess advanced improvements to the Brayton Cycle (such as but not limited to firing temperature, pressure ratio, combustion techniques, intercooling, fuel or combustion air augmentation, enhanced blade cooling schemes) that will lead to significant performance improvements in coal based power systems. This assessment is conducted in the context of conceptual design studies (systems studies) that advance state-of-art Brayton cycles and result in coal based efficiencies equivalent to 65% + on natural gas basis (LHV), or approximately an 8% reduction in heat rate of an IGCC plant utilizing the H class steam cooled gas turbine. H class gas turbines are commercially offered by General Electric and Mitsubishi for natural gas based combined cycle applications with 60% efficiency (LHV) and it is expected that such machine will be offered for syngas applications within the next 10 years. The studies are being sufficiently detailed so that third parties will be able to validate portions or all of the studies. The designs and system studies are based on plants for near zero emissions (including CO2). Also included in this program is the performance evaluation of other advanced technologies such as advanced compression concepts and the fuel cell based combined cycle. The objective of the fuel cell based combined cycle task is to identify the desired performance characteristics and design basis for a gas turbine that will be integrated with an SOFC in Integrated Gasification Fuel Cell (IGFC) applications. The goal is the conceptualization of near zero emission (including CO2 capture) integrated gasification power plants producing electricity as the principle product. The capability of such plants to coproduce H2 is qualitatively addressed. Since a total systems solution is critical to establishing a plant configuration worthy of a comprehensive market interest, a baseline IGCC plant scheme is developed and used to study how alternative process schemes and power cycles might be used and integrated to achieve higher systems efficiency. To achieve these design results, the total systems approach is taken requiring creative integration of the various process units within the plant. Advanced gas turbine based cycles for Integrated gasification Combined cycle (IGCC) applications are identified by a screening analysis and the more promising cycles recommended for detailed systems analysis. In the case of the IGFC task, the main objective is met by developing a steady-state simulation of the entire plant and then using dynamic simulations of the hybrid Solid Oxide Fuel Cell (SOFC)/Gas Turbine sub-system to investigate the turbo-machinery performance. From these investigations the desired performance characteristics and a basis for design of turbo-machinery for use in a fuel cell gas turbine power block is developed.
Book Synopsis Brayton Isotope Power System. Volume II. System Evaluation Attributes by :
Download or read book Brayton Isotope Power System. Volume II. System Evaluation Attributes written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of the Brayton Isotope Power System, Phase II Plan, contains the self-evaluation by AiResearch, GE, and TECO, addressing Section 3 of The Dynamic Systems Evaluation Criteria and Procedures established by the Department of Energy. These evaluation criteria addresses: Component Feasibility; Flight System Design Performance; GDS Test Results; Reliability and Practicality; Safety; Spacecraft Integration; and Cost and Risk. Included in each of these general categories are several attributes, each of which addresses a separate component, feature, or area of interest related to the power system, its development status, degree of preparedness for proceeding into a flight program, and/or the contractors' performance during Phase I. The key elements which indicate the readiness of a radioisotope power system to progress into a flight qualification program are: an advanced state of development of the power conversion system; demonstrated or exhibited potential for space systems standards of reliability; evident capability of meeting system safety requirements; favorable cost/benefit tradeoff considering projected missions and technology advancement potential; and proven feasibility of fabricating and qualifying a flight system and integrating it with a candidate spacecraft and launch vehicle. As a result of considerable government investment in Brayton system component development, the MHW isotope heat source and the BIPS Phase I Ground Demonstration System, the BIPS is a more advanced state of development than any previous radioisotope power system technology. Evidence of this is presented along with a complete review of the attributes, the contractor recommended ratings, and the rationale for the self-evaluation.
