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Showing 1 to 20 of 43 for “"Brayton cycle"”.
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The effect of recuperator geometry on regenerated Brayton cycle
A computer simulation of the Brayton cycle is used to develop a design procedure with respect to minimizing volume and weight for the counterflow plate-fin recuperator. Based on the Orenda OT-4 600 horsepower gas turbine, recuperator performance and dimensional characteristics are presented for an …
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Design study of an MGR direct Brayton-cycle power plant
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
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Analysis, modification and improvement of performance of a closed, regenerative, reciprocating Brayton cycle engine.
Thesis. 1978. Ph.D.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
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Energy based visualisation of a Brayton cycle power conversion unit for the purpose of condition monitoring
… but not for FDI. In this study, a basic Brayton cycle power conversion unit (PCU) is used as a case study to determine the suitability of an energy-based approach to FDI. The PCU is completely characterised by an attributed graph matrix in terms of energy and exergy. Exergy was identified …
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Thermodynamic design optimisation of an open recuperative twin-shaft solar thermal Brayton cycle with combined or exclusive reheating and intercooling
… related to, and therefore characteristic of, the cycle configuration, since the entropy generation rates in the individual components are interdependent. In this work, optimal design of three common open solar thermal Brayton cycle variants is investigated and compared using principles of the …
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A supercritical carbon dioxide cycle for next generation nuclear reactors
… performed of the family of supercritical CO2 Brayton power cycles for application to advanced nuclear reactors. The recompression cycle is shown to excel with respect to simplicity, compactness, cost and thermal efficiency. The main advantage of the supercritical CO2 cycle is comparable …
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Design of an automobile turbocharger gas turbine engine
… A gas turbine operates on an open version of the Brayton cycle and consists of a compressor, a combustion chamber and a turbine. An automobile turbocharger was chosen because it contains a compressor and turbine on a common shaft. Designs for the combustion chamber, oil system, fuel system, and …
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Second law analysis of a waste heat recovery combined power cycle using transcritical carbon dioxide
Common power cycles discard a large portion of useful energy into the environment via exhaust gasses. Through the use of cascade bottoming cycles, this wasted exergy may be utilized for power generation and hot water production. Heat transfer between cycles occurs through a heat exchanger. To …
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Reactor physics design of supercritical CO₂-cooled fast reactors
… the use of supercritical CO₂ (S-CO₂) as a Brayton cycle working fluid in a direct cycle is evaluated. By using S- CO₂ at turbine inlet conditions of 20 MPa and 550⁰C - 700⁰C, efficiencies between 45% and 50% can be achieved with extremely compact components. Neutronic evaluation of …
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Parametric Scramjet Analysis
… Engine performance is explored by parametric cycle analysis for the ideal scramjet as a function of material maximum service temperature and the lower heating value of jet engine fuels. The thermodynamic analysis is based on the Brayton cycle as similarly employed in describing the performance …
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Evaluation of power generation system architectures for manned Mars missions
… a combination of thin film solar and a nuclear Brayton cycle architecture is needed to maintain sufficient power. The problem definition process is achieved through domain exploration, functional decompositions, and mapping the process functions to their objects of form. The thesis then …
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A biomass-fueled combined steam and sCO2 heat and power cycle for Southern African conditions
… Integrating a supplementary high efficiency cycle, such as the supercritical-CO2 (sCO2) Brayton cycle, with an existing industrial Rankine cycle and a biomass fired boiler may be an economical option to increase overall thermal efficiency and net generation. However, the integration of sCO2 …
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Design, fabrication, and performance of a gas-turbine engine from an automobile turbocharger
… The engine operates on an open version of the Brayton cycle. Students will be able to evaluate the energy conversion efficiency and net work ratio from air temperature measurements in three stages of the cycle. The gas-turbine engine is made from an automobile turbocharger for its common shaft …
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Design, analysis and optimization of the power conversion system for the Modular Pebble Bed Reactor System
… Bed Reactor system (MPBR) requires a gas turbine cycle (Brayton cycle) as the power conversion system for it to achieve economic competitiveness as a GenIV nuclear system. The availability of controllable helium turbomachinery and compact heat exchangers are thus the critical enabling technology …
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Dynamic response of the supercritical C0₂ Brayton recompression cycle to various system transients
… of the Generation IV nuclear reactors. The SC0₂ cycle is highly attractive because of its low operating temperatures and high efficiency associated with working near the critical point of CO2. Unfortunately, the appealing features of using C0₂ near its critical point create complications in …
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Energy, exergy and exergoeconomic analyses of gas-turbine based systems
… thesis, the Makkah Power Plant, running on a Brayton cycle, is considered for analysis. The peak demand for electric power in the City of Makkah occurs in the middle of the day during the summer and is almost double the off-peak demand. The plant employs turbines of two world renowned …
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Control strategies for supercritical carbon dioxide power conversion systems
… carbon dioxide (S-C02) recompression cycle is a promising advanced power conversion cycle which couples well to numerous advanced nuclear reactor designs. This thesis investigates the dynamic simulation of, control strategies for, and selected transient results for an indirect S-CO2 …
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Development and application of a steady state code for supercritical carbon dioxide cycles
… for the most developed of the closed gas-turbine cycles (helium-Brayton), but at lower temperatures and higher pressures. The original in-house code, named CYCLES, could potentially be used by others who are researching the S-CO2 cycle, but it has its shortcomings. In particular, CYCLES does not …
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Optimized core design of a supercritical carbon dioxide-cooled fast reactor
… fuel transuranics, and directly coupled with a Brayton cycle is under investigation as part of a larger research effort at MIT. While the original GFR chosen by the GIF is a 600MWth version using Helium as a coolant, the work presented here is for a 2400 MWt, core using S-CO2 as a coolant, which …
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Artificial Neural Network for Predicting Heat Transfer Rates in Supercritical Carbon Dioxide
… carbon dioxide as a working fluid in a closed Brayton cycle is proving to be more efficient than a conventional steam-based Rankine engine. Understanding the heat transfer properties of supercritical fluids is important for the design of a working engine cycle. The thermophysical properties of …
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