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 16 of 16 for “"Thermodynamic cycle"”.
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Enhancing the performance of a self-oscillating fluidic heat engine (SOFHE) through thermodynamic cycle and phase change characterization
… (SOFHE) récemment découvert, en caractérisant le cycle thermodynamique (diagramme P-V) et le changement de phase (évaporation-condensation). Le SOFHE est proposé pour la récolte d'énergie thermique, couplé à un transducteur électromécanique, pour alimenter des capteurs sans fil utilisés dans …
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Análise teórico-experimental do coeficiente de perfomance (COP) de um sistema de refrigeração por jato-compressão
… a new intermittent refrigeration system ejector cycle characteristics, with use of waste heat. Initially, was doing a bibliographical survey about the vapor ejector refrigeration system technology. In the following stage was doing a simulation of the corresponding thermodynamic cycle, with …
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Estudo teórico de um motor stirling de pistão livre
… and some other phenomena of the real cycle. Numerical solutions are obtained based on motor simulations and the.models results are compareci with experiment. Good agreement is found with experiment demonstrating the adequacy of the model. The use of nonlinear theory for ideal …
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Perpetually playing physics
… on genetic algorithms can be used to reproduce thermodynamic cycles without prior knowledge of physics. To show this, we introduce an environment that models a simple heat engine. With this, we are able to optimize a neural network based policy to maximize the thermal efficiency for different …
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Preliminary design of a cryogenic thermoelectric generator.
… be used to increase overall efficiency of the thermodynamic cycle of a vehicle propulsion system.
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Propulsion considerations for supersonic oblique flying wings
… to the supersonic oblique flying wing, including cycle selection, sizing, and integration were investigated via the development and interrogation of aerodynamic and propulsive synthesis models. These models were an amalgamation of computational tools (MSES), linearized theory, parametric …
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A computational study of acidic Ionic Liquids for cellobiose hydrolysis in ionic liquids
… the effect of various ionic liquids on the thermodynamics of cellobiose acid hydrolysis, as both a catalyst and as a solvent, using computational means. An appropriate thermodynamic cycle protocol, a DLPNO-CCSD(T)/ccpVTZ//TPSS/def2-TZVP [M05-2X/6-31+G** (SMD)] proton exchange cycle, was …
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A Multifaceted Phenomenon of Hydrophobic Effects: Insights Learned from Nucleation Algorithm Based Computer Simulation Approach
… of the AVUS-HR nucleation algorithm and a thermodynamic cycle, to the studies of hydrophobicity-related researches. Due to the multifaceted characteristics of hydrophobicity, it is essential to acquire knowledge in various environments where hydrophobic relevant events occur for …
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Thermal design of a cooled micro gas turbine
… the compressor performance to the point that the cycle will no longer close. A film cooled turbine has thus been pursued as a means of keeping the turbine within its temperature constraints and at the same time reducing heat transfer to the compressor. The thermal design of this cooled micro gas …
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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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Aplicación de ciclos rankine orgánicos de baja temperatura a sistemas de microgeneración
… energy into electricity is the use of Rankine cycles. The organic Rankine cycle (ORC) is a type of Rankine cycle that operates using medium and low temperature heat sources, which could enable the improvement of electricity generation plants as well as the supply of electric energy to small …
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Computational study of the structure and function of membrane transport proteins
… forms. In the first work I describe the entire thermodynamic cycle of the GLUT1, a glucose transporter from the sugar porter family by employing non-equilibrium MD simulation and determining the free energy landscape associated with the so called IF–OF transition. Employing the information from …
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Heat-transfer analysis of double-pipe heat exchangers for indirect-cycle SCW NPP
… Heat exchanger (HX) design for indirect-cycle concepts of Pressure-Tube (PT) and Pressure-Vessel (PV) SCWRs. Thermodynamic configurations with an intermediate HX gives a possibility to have a single-reheat option for PT and PV SCWRs without introducing steam-reheat channels into a …
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Power Converters for Piezoelectric and Pyroelectric Materials
… proposed, where the regulation is done by a duty cycle controlled switched capacitor at the tunable PT control port. Two types of output filter are also analyzed and compared. Dc-dc converters with power rating ranging from 30 W to 100 W are built to verify the proposed design. Rosen-type PT …
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Development of nano composite coatings for enhanced performance in non-conventional lubricants under sliding contact.
… and use of various refrigerants in the thermodynamic cycle. Most of the refrigerants that are used in domestic appliances, commercial buildings, small scale industrial applications and automobiles are artificially formulated. Although artificially formulated refrigerants have excellent …
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Modelling and development of thermo-mechanical energy storage
… two technologies that use mechanically-driven thermodynamic cycles to store electricity in the form of high-grade thermal energy, employing abundant materials that are kept in large insulated tanks. Both technologies are free from geographic constraints, providing a significant advantage over …