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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 20 of 46 for “"power cycle"”.
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Thermoeconomic model and feasibility study of geothermal power cycle with Lithium extraction
… while exploiting a geothermal resource for power generation applications consists of various minerals in different concentrations. Increased demand for lithium, mainly for the electric vehicle industry, has increased the economic viability of extracting the mineral from geothermal brine. …
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Combined Steam Power Cycle and Turbofan Engine for Improvement in Aviation Climate Impacts
… engine. In this thesis, I develop an engine cycle model combining the turbofan engine with a steam power cycle and use the model to explore the benefits of applying this concept to aircraft engines. In order to study the impact to engine performance and emissions from adding a steam cycle, …
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Techno-economic analysis of pressurized oxy-fuel combustion power cycle for CO₂ capture
… have driven extensive research into new power generation cycles that enable carbon dioxide capture and sequestration. In this regard, oxy-fuel combustion is a promising new technology for capturing carbon dioxide in power generation systems utilizing hydrocarbon fuels. Combustion of a …
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Increasing Isentropic Efficiency with Hydrostatic Head and Venturi Ejection in a Rankine Power Cycle
… used to increase efficiency in a Rankine cycle the methods prove unfeasible in a small scale project. For this reason, a mathematical model and proof of concept design using hydrostatic head generated by elevation and venturi ejection for use by the condenser is developed along with the …
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Energy Harvesting Opportunities Throughout the Nuclear Power Cycle for Self-Powered Wireless Sensor Nodes
… solution, much research is being applied to self-powered sensing, implementing solutions which harvest wasted ambient energy sources to power these dedicated sensors. The adoption of not only wireless sensor nodes, but also self-powered capabilities in the nuclear energy process is critical as it …
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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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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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Thermoeconomic analysis and optimization of geothermal power cycle utilizing aqueous potassium carbonate for scrubbing superheated steam
… analysis was performed for a proposed geothermal power plant cycle utilizing aqueous potassium carbonate as a means of scrubbing the geothermal steam. This method of scrubbing is capable of preventing the loss of superheat while removing impurities from the steam. The main impurities of interest …
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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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Design and analysis of a natural draft direct dry cooling system for a supercritical carbon dioxide power cycle for CSP application
… benefits of both, promising reduced auxiliary power consumption, decreased system complexity and better efficiency from direct cooling. In this work, such an NDDDCS with vertically arranged heat exchangers around the tower circumference is designed and evaluated for a supercritical carbon …
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Design and analysis of a 1 kw Rankine power cycle, employing a multi-vane expander, for use with a low temperature solar collector.
Thesis. 1977. B.S. cn--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.
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A software tool for the preliminary performance modelling of central receivers and associated power cycles
… was limited to the thermodynamic study of the power cycle and receiver. The receiver model was validated by comparing results to published data. The model was able to simulate billboard, C-cavity and cylindrical receivers within 1% in cases involving single-phase fluids and by at most 3% - 5% …
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Systems-level design of ion transport membrane oxy-combustion power plants
… the penalties associated with CO 2 capture from power plants. Oxygen separation in an ITM system consists of many distinct physical processes, ranging from complex electrochemical and thermochemical reactions to conventional heat and mass transfer. The dependence of ITM performance on power cycle …
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Tritium thermal desorption testing of nuclear graphites irradiated at fluoride-salt-cooled high-temperature reactor conditions
… 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 adsorption onto …
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Design, analysis and experimental investigation of a new scroll expander based trigeneration system
… in use to generate medium to large scale of power or power and heat (co-generation). But small scale trigeneration with a single source of energy has not yet been developed. In this research work a small scale trigeneration system is designed, built and experimentally investigated for …
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A method for characterization of single-event latchup technologies as a function of geometric variation
… of creating low-impedance paths between the power supply rails known as the “latchup” state. Latchup is destructive and requires a power cycle to restore operation. Latchup can be stimulated by ionizing radiation such as a high-energy proton or heavy-ions from deep space, resulting in a …
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Pushing the limits of performance. is it really mind over matter? an investigation into the effects of menthol mouth rinsing and the capacity for fatigue amelioration in trained adolescent male cyclists under heat stress
… male athletes during a modified variable power cycle test (M-VCT). Participants (n=11) cycled for 30-min in hot conditions (31.4±0.9 °C, 23.4±3.7% RH) on two occasions. In a randomized crossover design, (1) menthol MR (0.01%) or (2) placebo (PLA) MR, was administered at 6-min intervals. …
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Conceptual design and performance characteristics of firebrick resistance-heated energy storage for industrial heat supply and variable electricity production
… in place of natural gas, or (2) be added to a power cycle to produce electricity when it is in demand. FIRES heat storage is nearly two orders of magnitude less expensive than the current energy storage options (on the order of dollars per kilowatt-hour capital cost). Cheap electricity …
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Enabling a Sustainable Economy through Energy Systems Modeling: Solar-centric, Efficient, Integrated and Continuous Process Synthesis and Optimization
… synergistic coproduction of solar thermal power and hydrogen, is introduced. The Hydricity concept is realized by judiciously integrating solar water power (SWP) cycle, solar thermal hydrogen production techniques, and turbine-based hydrogen power cycle and by suitably improving each one …
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Reconsideration of Inherent Neutron Sources in Liquid Fuel of Molten Salt Reactors
… aging simulated using ORIGEN for 300 days (no power) and a 150-day power cycle at 200 kWt followed by 150 days cooling, alpha-n source calculated by SOURCES4C and compared to alpha-n rates given by ORIGEN. Gamma-n reaction rates calculated from updated normalized cross-sections and compared to …
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