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Showing 1 to 14 of 14 for “"non-condensable gas"”.
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The effects of a non-condensable gas on pressurizer insurge transients
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1984.
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An experimental apparatus to study enhanced condensation heat transfer of steam on horizontal tubes
… to ensure a leak-tight apparatus so that the non-condensable gas content of the steam can be kept to a few parts-per-million. The boiler and steam piping is made of glass and stainless steel with rubber gaskets. Copper is used for the condensing tubes. The completed system has been tested …
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Stability of Depletion Chamber Edges in Oil Sands Recovery Processes
… to a higher mobility of oil phase and second, non-condensable gas (NCG) that provides an insulative effect in a reservoir to reduce heat loss and consequently raising the thermal efficiency. Solvents most used in oil sands processes are C3 to C7 solvents whereas NCGs typically consist of …
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Efecto de la disipacion viscosa en la condensacion de vapor sobrecalentado
… of a superheated vapour, in the presence of a non-condensable gas, for forced flow over an horizontal, isothermal flat plate ata constant temperature, is analyzed. Condensation of pure vapour is treated as a particular case. The problem is formulated as an exact boundary layer solution. For …
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Energy Recovery from Oil Sands Reservoirs
… of steam chamber where both SAGD and Steam and Gas Push (SAGP) processes were compared to understand the impact of non-condensable gas on heat transport at the edge of the chamber. The second approach uses a detailed compositional model to exam the time scales for steam and bitumen flow within …
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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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Using oscillations to detect capillary condensation in MCM-41
In micro- and mesopores of tight, unconventional gas reservoirs, the net gas-in-place may contain significant contributions from adsorbed/condensed gas. In this study, we present a simple and novel oscillation-based method to measure the net gas-in-place with capillary condensation. This method was …
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Ablative pyrolysis of biomass
… of 12.4 wt% char, 11.5 wt% water and 9.2 wt% non-condensable gas. Reactor throughputs of 2 kg/h dry ablated wood were achieved at 600°C. The theoretical ablative pyrolysis reactor design methodology was simplified and improved based upon empirical data derived from wood rod ablation …
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Thermal design of humidification dehumidification systems for affordable and small-scale desalination
… dehumidification (HDH) technology is a carrier-gas-based thermal desalination technique ideal for application in a small-scale system but, currently, has a high cost of water production (about 30 $/m³ of pure water produced). The present thesis describes fundamental contributions to the thermal …
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A Study on the Heavy Crude Oil Viscosity Reduction with the Dissolution of Nitrogen and Carbon Dioxide
… different compositions of the mixture of the two gases were also injected. In the first mixture, varied quantities of the two gases were used; 62:5%, 82:2% and 86:4% of the mixture was nitrogen while 37:5%, 17:8% and 13:6% was carbon dioxide at total test pressures of 100, 300 and 500 psi. The …
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One-dimensional positive displacement pump description in cavitating conditions
… multiphase conditions.The second phase contains non-condensable gas and vapour formation, bothimportant in the density and speed of sound variation. The adopted solutionscheme is a finite volume method with a Monotonic Upwind Scheme forConservational Law (MUSCL). This algorithm is second-order …
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High Grade Carbon From Crop Oil Tars
… used to make carbon products and are important nonrenewable sources to replace by the use of crop oil tars. </p> <p>Lab-scale experiments have shown that the tars produced during crop oil cracking can be converted into a pure, granulated carbon product. This conversion, known as carbonization, …
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Numerical modeling and simulation of cavitating flows in different regimes
… approach for a mixture of water–vapor–gas 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 …
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Modelling of the deaerator system in Flownex
… model to predict the steady state, transient and non-condensable gas extraction characteristics of the equipment. The first activity performed was to establish the types and operating principles of the deaerators used in industry, particularly in Eskom power stations. This was achieved through a …