Academic literature on the topic 'Noncondensing gas'

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Journal articles on the topic "Noncondensing gas"

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Curtin, Timothy. "Applying Econometrics to the Carbon Dioxide “Control Knob”." Scientific World Journal 2012 (2012): 1–12. http://dx.doi.org/10.1100/2012/761473.

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This paper tests various propositions underlying claims that observed global temperature change is mostly attributable to anthropogenic noncondensing greenhouse gases, and that although water vapour is recognized to be a dominant contributor to the overall greenhouse gas (GHG) effect, that effect is merely a “feedback” from rising temperatures initially resultingonlyfrom “non-condensing” GHGs and not at all from variations in preexisting naturally caused atmospheric water vapour (i.e., [H2O]). However, this paper shows that “initial radiative forcing” is not exclusively attributable to forcings from noncondensing GHG, both because atmospheric water vapour existed before there were any significant increases in GHG concentrations or temperatures and also because there is no evidence that such increases have produced measurably higher [H2O]. The paper distinguishes between forcing and feedback impacts of water vapour and contends that it is theprimaryforcing agent, at much more than 50% of the total GHG gas effect. That means that controlling atmospheric carbon dioxide is unlikely to be an effective “control knob” as claimed by Lacis et al. (2010).
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Naylor, David, and Jacob Friedman. "Model of Film Condensation on a Vertical Plate with Noncondensing Gas." Journal of Thermophysics and Heat Transfer 24, no. 3 (July 2010): 501–5. http://dx.doi.org/10.2514/1.43136.

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Dincer, I., Y. Haseli, and G. F. Naterer. "Thermal Effectiveness Correlation for a Shell and Tube Condenser with Noncondensing Gas." Journal of Thermophysics and Heat Transfer 22, no. 3 (July 2008): 501–7. http://dx.doi.org/10.2514/1.34735.

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Alt, S., and W. Lischke. "Heat transfer in horizontal tubes during two phase natural circulation with presence of noncondensing gas." Heat and Mass Transfer 36, no. 6 (November 27, 2000): 575–82. http://dx.doi.org/10.1007/s002310000121.

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Volchkov, E. P., V. V. Terekhov, and Viktor I. Terekhov. "Heat and Mass Transfer in a Boundary Layer During Vapor Condensation in the Presence of Noncondensing Gas." Heat Transfer Research 28, no. 4-6 (1997): 296–304. http://dx.doi.org/10.1615/heattransres.v28.i4-6.110.

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Abdullah, R., J. R. Cooper, A. Briggs, and J. W. Rose. "Condensation of steam and R113 on a bank of horizontal tubes in the presence of a noncondensing gas." Experimental Thermal and Fluid Science 10, no. 3 (April 1995): 298–306. http://dx.doi.org/10.1016/0894-1777(94)00079-n.

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Close, D. J., M. K. Peck, R. F. White, and K. J. Mahoney. "Buoyancy-Driven Heat Transfer and Flow Between a Wetted Heat Source and an Isothermal Cube." Journal of Heat Transfer 113, no. 2 (May 1, 1991): 371–76. http://dx.doi.org/10.1115/1.2910571.

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This paper describes flow visualization and heat transfer experiments conducted with a heat source inside an isothermal cube filled with a saturated or near-saturated gas/vapor mixture. The mixture was formed by vaporizing liquid from the surface of the heat source, and allowing it to condense on the surfaces of the cube, which was initially filled with a noncondensing gas. Visualization studies showed that for air and ethanol below 35°C, and for air and water, the flow patterns were similar with the hot plume rising from the source. For air and ethanol above 35° C the flow pattern reversed with the hot plume flowing downward. For temperatures spanning 35° C, which is the zero buoyancy temperature for the ethanol/water azeotrope and air, no distinct pattern was observed. Using water, liquid droplets fell like rain throughout the cube. Using ethanol, a fog of droplets moved with the fluid flow. Heat transfer experiments were made with water and air, and conductances between plate and cube of around 580 W·m−2·K−1 measured. Agreement between the similarity theory developed for saturated gas/vapor mixtures, and correlations for single component fluids only, was very good. Together with qualitative support from the visualization experiments, the theory developed in a earlier paper deriving a similarity relationship between single fluids and gas/vapor mixtures has been validated.
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Fujii, Tetsu, and Lu Xu. "Free-Convection Condensation of Steam on a Vertical Surface in the Presence of a Small Amount of Noncondensing Gas." Transactions of the Japan Society of Mechanical Engineers Series B 59, no. 561 (1993): 1664–71. http://dx.doi.org/10.1299/kikaib.59.1664.

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Briggs, Adrian, and Sritharan Sabaratnam. "Condensation From Pure Steam and Steam–Air Mixtures on Integral-Fin Tubes in a Bank." Journal of Heat Transfer 127, no. 6 (December 22, 2004): 571–80. http://dx.doi.org/10.1115/1.1915371.

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Data are reported for condensation of steam with and without the presence of air on three rows of integral-fin tubes situated in a bank of plain tubes. The data cover a wide range of vapor velocities and air concentrations. Unlike previously reported data for plain tubes using the same test bank and apparatus, the heat-transfer coefficients for the finned tubes were largely unaffected by vapor velocity. When compared to a plain tube of fin-tip diameter and at the same vapor side temperature difference, heat-transfer enhancement ratios between 3.7 and 4.9 were found for the finned tubes compared to a plain tube in quiescent vapor conditions, while values between 1.9 and 3.9 were found when compared to a plain tube at the same vapor velocity. When compared to the plain tubes, the heat transfer to the finned tubes was much more susceptible to the presence of noncondensing gas (air) in the vapor, with enhancement ratios falling as low as 1.5 compared to the plain tubes when even small concentrations of air were present.
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Mil’man, O. O., A. Yu Kartuesova, V. S. Krylov, K. B. Minko, and A. V. Ptakhin. "Optimizing Parameters of a High-Efficiency Steam Condenser from a Steam-Gas Mixture with a Large Content of Noncondensing Gases." Thermal Engineering 68, no. 12 (December 2021): 930–35. http://dx.doi.org/10.1134/s0040601521120065.

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Dissertations / Theses on the topic "Noncondensing gas"

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Товажнянський, Леонід Леонідович, Петро Олексійович Капустенко, О. А. Василенко, and С. К. Кусаков. "Моделювання теплопередачі в пластинчастому теплообміннику для конденсації пари в присутності неконденсуючого газу." Thesis, Національний технічний університет України "Київський політехнічний інститут імені Ігоря Сікорського", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41632.

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Проаналізовано процес конденсації пари з суміші з неконденсуючим газом і запропоновано математичну модель для конденсації в каналах пластинчастих теплообмінних апаратів (ПТА). Модель розроблено з урахуванням варіації локальних параметрів процесів тепло- та масообміну по поверхні конденсації та особливостей інтенсифікації цих процесів у каналах ПТА. Модель враховує вплив геометрії гофрів пластин на інтенсивність процесу. Перевірку адекватності моделі виконано шляхом порівняння з експериментальними даними у отриманими на зразку каналу ПТА.
The process of vapour condensation from its mixture with noncondensing gas is analysed and mathematical model for condensation in PHE channels is proposed. The model is developed with accounting for the variation of local parameters of heat and mass transfer processes along condensation surface and features of these processes intensification in PHEs channels. The model is accounting the effects of plates corrugations geometry on process intensity. The model validation is performed by comparison with experimental data for a sample of PHE channel.
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