Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"brayton cycles"”.
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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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Integrating fluidized bed heat exchangers and particle thermal energy storage with sCO₂ recompression Brayton cycles for concentrating solar power
… implement supercritical carbon dioxide (sCO2) cycles at firing temperatures above 700°C. However, the design of effective particle-sCO2 HXs (HX) remains a challenge. Recent studies have explored how mild fluidization of gravity-fed particle flows can increase overall particle-sCO2 heat transfer …
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A Design Tool For The Evaluation Of Atmosphere Independent Propulsion In Submarines
… include mechanical such as closed cycle diesels, Brayton cycles and Stirling engines, to electro-chemical designs, such as fuel cells and aluminum oxygen semi- cells. A computer code was written which integrates these propulsion options with mission and owner's requirements to provide a balanced …
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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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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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Techno-economic evaluation of cross-cutting technologies for cost reduction in nuclear power plants
… instrumentation and control, advanced power cycles, embedment, energy storage, and robotics. As plant overnight costs and construction times have tripled in the US since Three Mile Island, such technologies thus have significant potential to aid a troubled industry. These estimates notably do …
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Novel Approach for Computational Modeling of a Non-Premixed Rotating Detonation Engine
Detonation cycles are identified as an efficient alternative to the Brayton cycles used in power and propulsion applications. Rotating Detonation Engine (RDE) operating on a detonation cycle works by compressing the working fluid across a detonation wave, thereby reducing the number of compressor …
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Opportunity for Long Duration Storage Technologies: Thermal and Compressed Air Energy Storage
… is the development of higher efficiency power cycles, primarily closed Brayton cycles, for new storage plants operating with maximum temperatures generally under 1000°C. The third strategy utilizes storage materials and power cycles at temperatures significantly above 1000°C which requires …
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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 …