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Showing 1 to 17 of 17 for “"non-condensable gases"”.
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Nucleation Dynamics for Water Condensation on Hydrophobic Surfaces in the Presence of Non-Condensable Gases
… nucleation dynamics. However, the presence of non-condensable gas can strongly reduce the nucleation density rate by forming a vapor-depleted gas diffusion layer. Therefore, this work studied the relationship between nucleation density rate and supersaturation ratio during dropwise condensation …
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MSF process modelling, simulation and optimisation : impact of non-condensable gases and fouling factor on design and operation. Optimal design and operation of MSF desalination process with non-condensable gases and calcium carbonate fouling, flexible design operation and scheduling under variable demand and seawater temperature using gPROMS.
… the number of stages. Furthermore, the effect of non-condensable gases (NCG) on the steady state mathematical model of MSF process is developed and implemented in the MSF model developed earlier. Then the model is used to study effect of NCG on the overall heat transfer coefficient. The simulation …
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Entropy generation minimization of a heat and mass exchanger for use in a humidification-dehumidification desalination system
… generation in a condenser with high fractions of non-condensable gases are examined using control volume, scaling, and boundary layer techniques, with the aim of defining a criterion for minimum entropy generation rate that is useful in engineering analyses. This process is particularly relevant …
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Design and Operation of Multistage Flash (MSF) Desalination: Advanced Control Strategies and Impact of Fouling. Design operation and control of multistage flash desalination processes: dynamic modelling of fouling, effect of non-condensable gases on venting system design and implementation of GMC and fuzzy control
… its performance. Among these problems are the non-condensable gases (NCGs) and the accumulation of fouling which they work as heat insulation materials. As a result, the MSF pumps and the heat transfer equipment are overdesigned and consequently increase the capital cost and decrease the …
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Process modeling and analysis of CO₂ purification for oxy-coal combustion
… CO₂ and H₂0 with contaminants like NOx, SOx, and non-condensable gases like argon, oxygen and nitrogen. For carbon sequestration and Enhanced Oil Recovery (EOR) applications, pipeline transport standards as well as storage specifications impose concentration limits on these contaminants. These …
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Fractional Catalytic Pyrolysis Technology for the Production of Upgraded Bio-oil using FCC Catalyst
… and vapor residence time) and recycling of the non-condensable gases (NCG) on the product distribution and the quality of the bio-oil were investigated. The first part of the study demonstrates the influence of catalytic property of FCC catalyst on the product distribution and quality of the …
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Modeling the Transient Response of a Thermosyphon
… space due to the expanding and contracting of non-condensable gases in the vapor space. The model assumed quasi-steady one-dimensional vapor flow, transient one-dimensional flow in the falling liquid film, and transient behavior in the liquid pool in the evaporator. The model also assumed …
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Review of H2S abatement in geothermal plants and laboratory scale design of tray plate distillation tower
… still be substantial. In particular, dissolved non-condensable gases (NCG) such as CO2 and H2S within geothermal fluids have led to increased interest in developing methods for decreasing these emissions through abatement systems or even potentially using these gases to generate value for use in …
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Developing an active, high-heat-flux thermal management strategy for power electronics via jumping-droplet phase-change cooling
… cooling without jumping and by 20% compared to non-EFE jumping. Dynamic switching of the electric field for a two-GaN system reveals the potential for active cooling of mobile hot spots. The opportunity for further cooling enhancement by the removal of non-condensable gases (NCGs) is discussed, …
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A standard operating procedure for accurate condensation heat transfer measurements
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Microwave-assisted pyrolysis of HDPE using an activated carbon bed
… transport fuels petrol and diesel (C5–C21). The non-condensable gases that resulted were short-chain aliphatics that could be used as feedstock for the creation of new chemicals (such as virgin HDPE), or fuels such as natural gas and LPG. The development of apparatus capable of adding sample in a …
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Wetting and phase-change phenomena on micro/nanostructures for enhanced heat transfer
… front becomes important. We studied this phenomenon, explained the effect of such microscale dynamics on the overall propagation behavior, and proposed a strategy to account for these dynamics. While these propagation studies provide a means to deliver liquid to high heat flux regions, we …
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Novel Charging Station and Computational Modeling for High Thermal Conductivity Heat Pipe Thermal Ground Planes
… TGP, including the effects of the presence of non-condensable gases (NCGs). This work shows that the axial effective thermal conductivity of the TGP decreases when the substrate and/or wick are thicker and/or with the presence of NCGs. Moreover, it was demonstrated that this model may be …
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The fluidized retorting of oil shale from the Mahogany ledge of the Green River formation of Colorado
… shale of the same particle size. The yield of non-condensable gases increased 0.67, 0.72, 1.01, and 1.2 cubic feet for oil shale of minus 16 plus 28, minus 28 plus 70, minus 70 plus 100, and minus 100 plus 200 mesh (Tyler screen scale). A decrease in particle size of oil shale retorted at 715°F …
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Heat transfer through a condensate droplet on hydrophobic and nanostructured superhydrophobic surfaces
… mechanisms governing vapor condensation on non-wetting surfaces is crucial to a wide range of energy and water applications. In this thesis, we reconcile classical droplet growth modeling barriers by utilizing two-dimensional axisymmetric numerical simulations to study individual droplet …
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Torrefaction and Steam Explosion of Selected Biomass for Biofuel Production
… a solid carbon, commonly known as biochar, and condensable (torrefaction liquid (TL)) and non-condensable gases. In this study, torrefaction characteristics were investigated to observe its effects on the thermal and physiochemical properties of the pellets produced. During the torrefaction …
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Numerical modeling and simulation of cavitating flows in different regimes
… is developed to study the effect of non–condensable gas on bluff–body cavitation. (ii) Incipient cavitation in the shear layer of a backstep is studied using incompressible simulations of the flow field coupled with a continuum equation for vapor volume fraction. (iii) The inception …