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 20 of 28 for “"heat of vaporization"”.
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On the heat of vaporization of ammonia
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1891
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Calculation of vapor pressures using the Frost-Kalkwarf equation and gas imperfections determined from the heat of vaporization and vapor pressures
Includes bibliographical references.
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Periodic reverse flow in microchannel evaporators
… a very commonly seen phenomenon in small scale heat removal applications, for instance, microchannel heat sinks for cooling of electronics. Due to the industry’s strict requirement for thermal stability, previous research on flow instabilities in microchannels has been largely focused on heat …
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Influence of forced convection on sessile droplet evaporation
… process with potential for achieving large heat transfer rates under high air temperatures due to the latent heat of vaporization. Bioin-spired artificial perspiration systems can leverage the evaporation of sessile droplets to implement this effect for different cooling applications. In the …
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Analytical Perturbed Hard Sphere Models Based on Solubility and Volumetric Studies of Organic Solids Interacting With Supercritical Fluids
… data suggested that partial molar volume data of the solute v(,2) would benefit enormously the modelling of the supercritical phase. An expression was derived that indicates the solubility data or gas chromatography data are not well suited for obtaining v(,2); therefore, a new experimental …
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Development of Transferable Coarse-Grained Models of Amino Acids
… amino acids that are the structural units of biomolecules and biomaterials such as proteins and peptide amphiphiles (PAs). The focus of this study was to develop accurate transferable coarse-grained (CG) models of those amino acids. In CG models, several atoms are represented together as a …
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Selection of Prediction Methods for Thermophysical Properties for Process Modeling and Product Design of Biodiesel Manufacturing
… the four fundamental thermophysical properties of the feed oil: liquid density (Ï L), vapor pressure (Pvap), liquid heat capacity (CpL), and heat of vaporization (Î Hvap). Additionally, to characterize the fuel qualities, it is critical to develop quantitative correlations to predict three …
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Pool and flow boiling of novel heat transfer fluids from nanostructured surfaces
Steadily increasing heat dissipation in electronic devices has generated renewed interest in direct immersion cooling. The ideal heat transfer fluid for direct immersion cooling applications should be chemically and thermally stable, and compatible with the electronic components. These constraints …
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Correlation and prediction of solubility of low vapor pressure solids in supercritical fluids
Binary solubility data of hydrocarbon solids in supercritical fluids were correlated using the compressed gas model. Data included in the analysis were for solubilities of binary mixtures of napthalene, 2,3- and 2,6-dimethylnapthalene, benzoic acid, phenanthrene, anthracene and pyrene in both …
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Assessing the effects of ethanol addition on particulate matter emissions in GDI engines
Previous research on the effects of ethanol addition on particulate matter (PM) emissions in GDI engines show diverse results. In this thesis, an overview on three major aspects, PM formation, effects of engine operating conditions, and ethanol effects, unveils the large number of factors that can …
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Three-phase Heat Transfer
Phase-change heat transfer involves the exchange of thermal energy when a substance transitions between different phases, such as solid to liquid (melting), liquid to vapor (boiling), or vice versa. During phase-change, energy is absorbed or released without a change in temperature. In particular, …
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Design of a microbreather for two-phase microchannel devices
… in microchannels are encountered in a variety of microfluidic applications. Two-phase microchannel heat sinks leverage the latent heat of vaporization to offer an efficient method of dissipating large heat fluxes in a compact device. In microscale methanol-based fuel cells, the chemical …
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Knock limits in spark ignited direct injected engines using gasoline/ethanol blends
… cooling effect due to fuel evaporation. The use of gasoline/ethanol blends in DI is therefore especially advantageous due to the high heat of vaporization of ethanol. Additionally ethanol blends also display superior chemical resistance to auto-ignition, therefore allowing the further extension …
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Enhanced Heat Transfer Performance by Shape Optimization of a Non-axisymmetric Droplet Evaporating on a Heated Micropillar
<p>Abstract</p> <p>Enhanced Heat Transfer Performance by Shape Optimization of a Non-axisymmetric Droplet Evaporating on a Heated Micropillar</p> <p>By</p> <p>Haotian Wu</p> <p>Department of Mechanical Engineering and Materials Science</p> <p>Washington University in St. Louis, 2019</p> <p>Research …
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Modeling and Control of the Paper Machine Drying Section
The topic of this thesis is modeling and control of the last part of the paper machine - the drying section. Paper is dried by letting it pass through a series of steam heated cylinders and the evaporation is thus powered by the latent heat of vaporization of the steam. The moisture in the paper is …
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Development of an air-cooled, loop-type heat pipe with multiple condensers
… to high performance computing systems. Heat pipes are capillary-pumped devices that take advantage of the latent heat of vaporization of a working fluid to achieve low thermal resistance (~0.1 °C/W), and have been of particular interest to address these thermal management needs for …
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Analysis of an oscillating engine for power generation based on the "Drinking Bird Toy"
"The investigation presented here is of an oscillating engine of which the "Drinking Bird Toy" is a prime example. A model is set up to represent the way the toy works and an attempt is made to calculate the power output for a hypothetical large scale engine working on the same principle. This …
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Atomic motion on the close-packed plane of a hexagonally close-packed metal
We present, for the first time, an account of single adatom behavior on the close-packed surface of a hexagonally close-packed material. Specifically, we have explored the diffusion and related phenomena of Re and W adatoms on Re (0001). Prefactors and activation energies to diffusion of …
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Atomic motion on the close packed plane of a hexagonally close packed metal
We present, for the first time, an account of single adatom behavior on the close-packed surface of a hexagonally dose-packed material. Specifically, we have explored the diffusion and related phenomena of Re and W adatoms on Re (0001). Prefactors and activation energies to diffusion of 6.13(x2.6±1 …
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