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Showing 1 to 20 of 70 for “"Brayton"”.
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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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Thermodynamic Analysis and Optimization of Supercritical Carbon Dioxide Brayton Cycles
… this end, supercritical carbon dioxide (S-CO2) Brayton cycles present great promise particularly in high temperature concentrated solar power (CSP) and waste heat recovery (WHR) applications. With this regard, this dissertation is intended to perform thorough thermodynamic analyses and …
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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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Dynamic response of the supercritical C0₂ Brayton recompression cycle to various system transients
… cycle scoping code for the recompression SC0₂ Brayton cycle. It is based off of the SC0₂ Power Systems (SCPS) code, and incorporates many improvements and modifications. Written in FORTRAN 90, TSCYCO uses a lumped parameter model and a momentum integral model approach. The code uses a …
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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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Thermofluid design and analysis of centrifugal compressors for a 50 MWe concentrated solar power supercritical CO₂ Brayton power cycle
Brayton power cycles employing supercritical CO₂ (sCO₂) as the working fluid are attracting growing interest for use in concentrated solar power (CSP) plants. The primary motivation is to enhance the efficiency of the power block and reduce overall system costs by utilising the high efficiency, …
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Integrating fluidized bed heat exchangers and particle thermal energy storage with sCO₂ recompression Brayton cycles for concentrating solar power
… bed. A process model of an sCO2 recompression Brayton cycle (RCBC) with turbine firing temperatures > 700°C was integrated with the 1-D particle-sCO2 HX model and a particle TES sub-system model to assess optimal operating conditions for CSP. Am optimization routine was used to identify HX …
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Thermodynamic design optimisation of an open recuperative twin-shaft solar thermal Brayton cycle with combined or exclusive reheating and intercooling
… design of three common open solar thermal Brayton cycle variants is investigated and compared using principles of the second law of thermodynamics and the method of entropy generation minimisation. The basic cycle, modified accordingly to construct the reheated, intercooled and combined …
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Development and application of a steady state code for supercritical carbon dioxide cycles
… 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 factor in 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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An efficient heat engine for ocean thermal energy conversion
… thermal cycle has some similarity to an Inverted Brayton cycle’s (IBC) colder core than intake or exhaust; it has similarity to the Brayton cycle’s ramjet momentum-driven no-moving-parts compression. This thermal cycle is more efficient than the IBC or Rankine. It has a theoretical …
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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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A biomass-fueled combined steam and sCO2 heat and power cycle for Southern African conditions
… 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 heaters within the biomass boiler presents …
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Analysis of required supporting systems for the supercritical CO₂ power conversion system
… reduction in the compressor work of a closed Brayton Cycle. Therefore > 45% efficiency can be achieved at much more moderate temperatures than is optimal for the helium Brayton cycles. An additional benefit of the S-CO₂ system is its universal applicability as an indirect secondary Power …
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Development of thermodynamic cycles for sodium-cooled-fast reactors.
… cycle and supercritical-pressure CO2 Brayton-gas-turbine cycle. The feasibility of these options is discussed. The thermal efficiencies of ideal and non-ideal CO2 Brayton gas-turbine cycles were optimized by varying CO2 pressures and temperatures at the outlet of Na-CO2 heat exchanger.
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Tritium thermal desorption testing of nuclear graphites irradiated at fluoride-salt-cooled high-temperature reactor conditions
… molten flibe salt (LiF-BeF2) coolant, and an Air-Brayton power cycle. A prominent technical challenge for the FHR is maintaining the release of tritium generated from neutron irradiation of flibe below acceptable levels. One proposed method for partitioning tritium from the salt is through …
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Improving heat capture for power generation in coal gasification plants
… high strength materials at high temperature. A Brayton power cycle with recuperation is considered in this work, absorbing heat from the hot syngas and rejecting it to steam. Over a range of different Brayton cycle pressure ratios and maximum temperatures, no improvement in plant efficiency was …
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Comparative study of advanced heat pumps
… The study includes complex compound absorption, Brayton, Stirling, and thermoelectric devices. Comparisons are made to the more commonly applied vapor compression systems, including those using R-134a. The study examines the effect of thermal resistances between the device and the heat rejection …
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