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Conceptual Design Study Of A Closed Brayton Cycle Turbogenerator For Space Power Thermal To Electric Conversion System
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Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781723715327 Total Pages :40 pages Book Rating :4.7/5 (153 download)
Book Synopsis Conceptual Design Study of a Closed Brayton Cycle Turbogenerator for Space Power Thermal-To-Electric Conversion System by : National Aeronautics and Space Adm Nasa
Download or read book Conceptual Design Study of a Closed Brayton Cycle Turbogenerator for Space Power Thermal-To-Electric Conversion System written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-14 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A conceptual design study was completed for a 360 kW Helium-Xenon closed Brayton cycle turbogenerator. The selected configuration is comprised of a single-shaft gas turbine engine coupled directly to a high-speed generator. The engine turbomachinery includes a 2.5:1 pressure ratio compression system with an inlet corrected flow of 0.44 kg/sec. The single centrifugal stage impeller discharges into a scroll via a vaned diffuser. The scroll routes the air into the cold side sector of the recuperator. The hot gas exits a nuclear reactor radiator at 1300 K and enters the turbine via a single-vaned scroll. The hot gases are expanded through the turbine and then diffused before entering the hot side sector of the recuperator. The single shaft design is supported by air bearings. The high efficiency shaft mounted permanent magnet generator produces an output of 370 kW at a speed of 60,000 rpm. The total weight of the turbogenerator is estimated to be only 123 kg (less than 5% of the total power plant) and has a volume of approximately 0.11 cubic meters. This turbogenerator is a key element in achieving the 40 to 45% overall power plant thermal efficiency.Hansen, Jeff L.Marshall Space Flight CenterTURBINES; TURBOGENERATORS; DESIGN ANALYSIS; SYSTEMS ENGINEERING; GAS TURBINE ENGINES; THERMODYNAMIC EFFICIENCY; CLOSED CYCLES; FREE CONVECTION
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 Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1973 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722960377 Total Pages :164 pages Book Rating :4.9/5 (63 download)
Book Synopsis Brayton Power Conversion System Parametric Design Modelling for Nuclear Electric Propulsion by : National Aeronautics and Space Administration (NASA)
Download or read book Brayton Power Conversion System Parametric Design Modelling for Nuclear Electric Propulsion written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: The parametrically based closed Brayton cycle (CBC) computer design model was developed for inclusion into the NASA LeRC overall Nuclear Electric Propulsion (NEP) end-to-end systems model. The code is intended to provide greater depth to the NEP system modeling which is required to more accurately predict the impact of specific technology on system performance. The CBC model is parametrically based to allow for conducting detailed optimization studies and to provide for easy integration into an overall optimizer driver routine. The power conversion model includes the modeling of the turbines, alternators, compressors, ducting, and heat exchangers (hot-side heat exchanger and recuperator). The code predicts performance to significant detail. The system characteristics determined include estimates of mass, efficiency, and the characteristic dimensions of the major power conversion system components. These characteristics are parametrically modeled as a function of input parameters such as the aerodynamic configuration (axial or radial), turbine inlet temperature, cycle temperature ratio, power level, lifetime, materials, and redundancy. Ashe, Thomas L. and Otting, William D. Unspecified Center BRAYTON CYCLE; CLOSED CYCLES; NUCLEAR ELECTRIC PROPULSION; PROPULSION SYSTEM CONFIGURATIONS; PROPULSION SYSTEM PERFORMANCE; AC GENERATORS; AERODYNAMIC CONFIGURATIONS; AXIAL FLOW TURBINES; COMPRESSORS; HEAT EXCHANGERS; INLET TEMPERATURE; REDUNDANCY; REGENERATORS; TEMPERATURE RATIO...
Book Synopsis Hearings by : United States. Congress. House
Download or read book Hearings written by United States. Congress. House and published by . This book was released on 1969 with total page 1346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1965-03 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Energy: a Continuing Bibliography with Indexes by :
Download or read book Energy: a Continuing Bibliography with Indexes written by and published by . This book was released on 1977 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hearings, Reports and Prints of the House Committee on Appropriations by : United States. Congress. House. Committee on Appropriations
Download or read book Hearings, Reports and Prints of the House Committee on Appropriations written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 1967 with total page 1280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Independent Offices and Dept. of Housing and Urban Development Publisher : ISBN 13 : Total Pages : pages Book Rating :4.:/5 (31 download)
Book Synopsis Independent Offices and Department of Housing and Urban Development Appropriations by : United States. Congress. House. Committee on Appropriations. Subcommittee on Independent Offices and Dept. of Housing and Urban Development
Download or read book Independent Offices and Department of Housing and Urban Development Appropriations written by United States. Congress. House. Committee on Appropriations. Subcommittee on Independent Offices and Dept. of Housing and Urban Development and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Organic Rankine Cycle (ORC) Power Systems by : Ennio Macchi
Download or read book Organic Rankine Cycle (ORC) Power Systems written by Ennio Macchi and published by Woodhead Publishing. This book was released on 2016-08-24 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic Rankine Cycle (ORC) Power Systems: Technologies and Applications provides a systematic and detailed description of organic Rankine cycle technologies and the way they are increasingly of interest for cost-effective sustainable energy generation. Popular applications include cogeneration from biomass and electricity generation from geothermal reservoirs and concentrating solar power installations, as well as waste heat recovery from gas turbines, internal combustion engines and medium- and low-temperature industrial processes. With hundreds of ORC power systems already in operation and the market growing at a fast pace, this is an active and engaging area of scientific research and technical development. The book is structured in three main parts: (i) Introduction to ORC Power Systems, Design and Optimization, (ii) ORC Plant Components, and (iii) Fields of Application. Provides a thorough introduction to ORC power systems Contains detailed chapters on ORC plant components Includes a section focusing on ORC design and optimization Reviews key applications of ORC technologies, including cogeneration from biomass, electricity generation from geothermal reservoirs and concentrating solar power installations, waste heat recovery from gas turbines, internal combustion engines and medium- and low-temperature industrial processes Various chapters are authored by well-known specialists from Academia and ORC manufacturers
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Independent Offices and Department of Housing and Urban Development Publisher : ISBN 13 : Total Pages :1282 pages Book Rating :4.:/5 (6 download)
Book Synopsis Department of housing and urban development by : United States. Congress. House. Committee on Appropriations. Subcommittee on Independent Offices and Department of Housing and Urban Development
Download or read book Department of housing and urban development written by United States. Congress. House. Committee on Appropriations. Subcommittee on Independent Offices and Department of Housing and Urban Development and published by . This book was released on 1967 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP. written by and published by . This book was released on 1974 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Off-Design Performance of 100 Kwe-Class Brayton Power Conversion Systems by : Nasa Technical Reports Server (Ntrs)
Download or read book Design and Off-Design Performance of 100 Kwe-Class Brayton Power Conversion Systems written by Nasa Technical Reports Server (Ntrs) and published by BiblioGov. This book was released on 2013-07 with total page 26 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.
Book Synopsis Energy Resources and Systems by : Tushar K. Ghosh
Download or read book Energy Resources and Systems written by Tushar K. Ghosh and published by Springer Science & Business Media. This book was released on 2009-06-04 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the lifetimes of the authors, the world and especially the United States have received three significant “wake-up calls” on energy production and consumption. The first of these occurred on October 15, 1973 when the Yom Kippur War began with an attack by Syria and Egypt on Israel. The United States and many western countries supported Israel. Because of the western support of Israel, several Arab oil exporting nations imposed an oil embargo on the west. These nations withheld five million barrels of oil per day. Other countries made up about one million barrels of oil per day but the net loss of four million barrels of oil production per day extended through March of 1974. This represented 7% of the free world’s (i. e. , excluding the USSR) oil production. In 1972 the price of crude oil was about $3. 00 per barrel and by the end of 1974 the price of oil had risen by a factor of 4 to over $12. 00. This resulted in one of the worst recessions in the post World War II era. As a result, there was a movement in the United States to become energy independent. At that time the United States imported about one third of its oil (about five million barrels per day). After the embargo was lifted, the world chose to ignore the “wake-up call” and went on with business as usual.
Download or read book Space Station Systems written by and published by . This book was released on 1987 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
