Готові списки джерел за темами / Re-vaporisation

Добірка наукової літератури з теми "Re-vaporisation"

Автор: Grafiati
Опубліковано: 22 червня 2024

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Зміст

  1. Статті в журналах
  2. Дисертації
  3. Тези доповідей конференцій

Статті в журналах з теми "Re-vaporisation":

1

Logan, S. R. "The Rationale of Trouton's Rule and of the Trouton-Hildebrand-Everett Rule." Zeitschrift für Naturforschung A 51, no. 12 (December 1, 1996): 1247–48. http://dx.doi.org/10.1515/zna-1996-1215.

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Abstract In seeking a rational basis for the general rules regarding the enthalpy of vaporisation of a liquid, it is shown that whereas Trouton's Rule is consistent with the assumption that the effective molar volume, v, for translational motion in the liquid is a constant fraction (2 x 10-5) of the molar volume of vapour at 1 atm, the rather better approximation of Trouton, Hildebrand and Everett (THE), which corrects for the effects of varying molecular density in the vapour, re-quires that v be 1.5 cm3 mol-1 for all substances. The introduction of the apparently more reasonable assumption that v is a constant fraction of the molar volume of the liquid, is shown to lead to an expression exhibiting much poorer cor-relation. It thus offers no improvement to Trouton's rule nor to the THE rule.
2

Welk, Blayne, Jennifer Reid, Michael Ordon, Hassan Razvi, and Jeffrey Campbell. "Population-based assessment of re-treatment and healthcare utilisation after photoselective vaporisation of the prostate or electrosurgical transurethral resection of the prostate." BJU International 124, no. 6 (August 26, 2019): 1047–54. http://dx.doi.org/10.1111/bju.14891.

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3

Kaplan, Steven A. "Re: Holmium Laser Enucleation (HoLEP) and Photoselective Vaporisation of the Prostate (PVP) for Patients with Benign Prostatic Hyperplasia (BPH) and Chronic Urinary Retention." Journal of Urology 194, no. 6 (December 2015): 1701–3. http://dx.doi.org/10.1016/j.juro.2015.09.039.

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4

Coetsee, Theresa, and Frederik De Bruin. "Gas Formation of Cobalt and Copper in the Application of Unconstrained Co-Cr-Al-Cu Metal Powders in Submerged Arc Welding: Gas Phase Thermodynamics and 3D Slag SEM Evidence." Processes 11, no. 4 (April 5, 2023): 1116. http://dx.doi.org/10.3390/pr11041116.

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Aluminium metal is not typically added to the submerged arc welding (SAW) process because it is easily oxidised to form unwanted slag in the weld pool. The successful application of aluminium as a de-oxidiser is illustrated in this study by preventing oxidation of Cr and Co to their oxides, thereby preventing element loss to the slag. Unconstrained pure metals of Al, Cr, Co and Cu were applied to investigate the gas formation behaviour of these elements in the SAW arc cavity. Of interest is the effect of copper in the arc cavity in terms of its possible substitution for aluminium. The results confirmed that the Al-Cr-Co-Cu alloyed weld metal total oxygen content was lowered to 176 ppm O, in comparison to 499 ppm O in the weld metal formed from welding with the original flux, which excluded metal powder additions. This lower ppm O value of 176 ppm O confirms that the added aluminium powder effectively lowered the original flux-induced partial oxygen pressure in the arc cavity, and at the molten flux–weld pool interface. Carbon steel was alloyed to 5.3% Co, 5.5% Cr, 5.3% Cu and 4.5% Al at 78% Co yield, 82% Cr yield, 78% Cu yield and 66% Al yield. Thermochemical equilibrium calculations confirm the partial oxygen pressure-lowering effect of aluminium when considering the gas–slag–alloy equilibrium. BSE (backscattered electron) images of the three-dimensional (3D) post-weld slag sample show dome structures which contain features of vapour formation and re-condensation. SEM-EDX (scanning electron microscope-energy dispersive X-ray) maps show that the dome surface matrix phase consists of Al-Mg-Ca-Si-Na-K-Ti-Fe-Mn oxy-fluoride. The spherical 3D structures of 10–40 µm in diameter consist of Fe-Mn-Si fluorides with some Cr, Cu and Co contained in some of the spheres. Cr and Co were observed in distinctive porous structures of approximately 10 µm in size, consisting partly of Cr oxy-fluoride and partly of Co oxy-fluoride. Nano-sized oxy-fluoride strands and spheres in the dome structures confirm vaporisation and re-condensation of oxy-fluorides. Cu and Na formed a distinct condensation pattern on the surface of the Si-Cu-Na-Mn-Fe-Co oxy-fluoride sphere. The results confirm the importance of including gas phase reactions in the interpretation of SAW process metallurgy.
5

Kaplan, Steven A. "Re: 180-W XPS GreenLight Laser Vaporisation versus Transurethral Resection of the Prostate for the Treatment of Benign Prostatic Obstruction: 6-Month Safety and Efficacy Results of a European Multicentre Randomised Trial—the GOLIATH Study." Journal of Urology 194, no. 2 (August 2015): 480–81. http://dx.doi.org/10.1016/j.juro.2015.04.046.

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6

Woo, Henry H., and Alexander Bachmann. "Re: Stephan Madersbacher. After Three Randomised Controlled Trials Comparing 120-W High-performance-system Potassium-titanyl-phosphate Laser Vaporisation to Transurethral Resection of the Prostate (TURP), Is This Procedure Finally First-line, Outdated, or Still Not Surpassing TURP? Eur Urol 2012;61:1174–6." European Urology 62, no. 1 (July 2012): e23-e24. http://dx.doi.org/10.1016/j.eururo.2012.03.056.

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7

Cornu, Jean-Nicolas, Eric Vicaut, Mounir Aout, and Bertrand Lukacs. "Reply from Authors re: Stephan Madersbacher. After Three Randomised Controlled Trials Comparing 120-W High-Performance-System Potassium-Titanyl-Phosphate Laser Vaporisation to Transurethral Resection of the Prostate (TURP), Is This Procedure Finally First-Line, Outdated, or Still Not Surpassing TURP? Eur Urol 2012;61:1174–6." European Urology 61, no. 6 (June 2012): 1176–77. http://dx.doi.org/10.1016/j.eururo.2012.03.013.

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8

Wu, Xiaolang, Jin Zhao, Shunzo Shimai, Xiaojian Mao, Jian Zhang, and Shiwei Wang. "Re-fluidising the aged gel for high-density alumina green body." Journal of Advanced Ceramics, July 21, 2022. http://dx.doi.org/10.1007/s40145-022-0615-1.

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AbstractA green body with a density as high as possible is critical to diminish the crisis of deformation or cracking when large-size parts are sintered. Here, a new method, i.e., re-fluidising the aged ceramic gel is developed to prepare the high-density green body. Alumina slurry with 56 vol% solid loading and copolymers of isobutylene and maleic anhydride were aged without vaporisation and re-fluidised by non-intrusive shearing after removing the exuded water. The re-fluidised slurry was re-casted. The resultant wet gel was dried and deboned at a low temperature. The relative density of the obtained green body was 64.6%, 1.5% higher than that without aging and re-fluidising. The linear sintering shrinkage of the body decreased by 0.7%. The enhanced green density is explained from the viewpoint of the solid loading and the structure of the slurry.
9

Njoroge, Margaret Mendi, Ulrike Fillinger, Adam Saddler, Sarah Moore, Willem Takken, Joop J. A. van Loon, and Alexandra Hiscox. "Evaluating putative repellent ‘push’ and attractive ‘pull’ components for manipulating the odour orientation of host-seeking malaria vectors in the peri-domestic space." Parasites & Vectors 14, no. 1 (January 11, 2021). http://dx.doi.org/10.1186/s13071-020-04556-7.

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Abstract Background Novel malaria vector control approaches aim to combine tools for maximum protection. This study aimed to evaluate novel and re-evaluate existing putative repellent ‘push’ and attractive ‘pull’ components for manipulating the odour orientation of malaria vectors in the peri-domestic space. Methods Anopheles arabiensis outdoor human landing catches and trap comparisons were implemented in large semi-field systems to (i) test the efficacy of Citriodiol® or transfluthrin-treated fabric strips positioned in house eave gaps as push components for preventing bites; (ii) understand the efficacy of MB5-baited Suna-traps in attracting vectors in the presence of a human being; (iii) assess 2-butanone as a CO2 replacement for trapping; (iv) determine the protection provided by a full push-pull set up. The air concentrations of the chemical constituents of the push–pull set-up were quantified. Results Microencapsulated Citriodiol® eave strips did not provide outdoor protection against host-seeking An. arabiensis. Transfluthrin-treated strips reduced the odds of a mosquito landing on the human volunteer (OR 0.17; 95% CI 0.12–0.23). This impact was lower (OR 0.59; 95% CI 0.52–0.66) during the push-pull experiment, which was associated with low nighttime temperatures likely affecting the transfluthrin vaporisation. The MB5-baited Suna trap supplemented with CO2 attracted only a third of the released mosquitoes in the absence of a human being; however, with a human volunteer in the same system, the trap caught < 1% of all released mosquitoes. The volunteer consistently attracted over two-thirds of all mosquitoes released. This was the case in the absence (‘pull’ only) and in the presence of a spatial repellent (‘push-pull’), indicating that in its current configuration the tested ‘pull’ does not provide a valuable addition to a spatial repellent. The chemical 2-butanone was ineffective in replacing CO2. Transfluthrin was detectable in the air space but with a strong linear reduction in concentrations over 5 m from release. The MB5 constituent chemicals were only irregularly detected, potentially suggesting insufficient release and concentration in the air for attraction. Conclusion This step-by-step evaluation of the selected ‘push’ and ‘pull’ components led to a better understanding of their ability to affect host-seeking behaviours of the malaria vector An. arabiensis in the peri-domestic space and helps to gauge the impact such tools would have when used in the field for monitoring or control.

Дисертації з теми "Re-vaporisation":

1

Obada, Dorel. "Evaluation de rejets moyen-terme en situation accidentelle grave d’un réacteur à eau pressurisée : étude expérimentale de la re-vaporisation de dépôts de produits de fission (Cs, I)." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10148/document.

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En cas d’accident grave sur un Réacteur à Eau Pressurisée, l’évaluation de la quantité d’iode susceptible d’être rejetée dans l’environnement revêt une grande importance du fait de la radiotoxicité et de la volatilité de cet élément. Ainsi, une connaissance de tous les phénomènes physico-chimiques se produisant est nécessaire. Ce travail s’est focalisé sur la re-vaporisation, jusqu’à 750°C, de dépôts des PFs contenant de l’iode, particulièrement le CsI et l’AgI, depuis la surface du circuit primaire composée d’acier 304L, 316L et Inconel 600 partiellement oxydés. Les résultats ont montré une influence significative de la composition de l’atmosphère sur les quantités et les formes chimiques de césium et d’iode re-vaporisés. Ainsi, sous vapeur d’eau l’iode et le césium se re-vaporisent intégralement depuis la surface métallique, sous forme de CsI. En présence d’air, l’iode est relâché intégralement, sous forme d’I2(g) majoritairement, tandis que le césium est partiellement retenu à la surface sous forme de chromate de césium, résultant de l’interaction entre le césium et l’oxyde de chrome (III) de la couche d’oxyde. L’utilisation de la technique de spectroscopie optique en ligne IBB-CEAS a permis d’établir la cinétique de relâchement d’I2(g), celle-ci présentant deux pics de relâchement, indiquant l’existence de plusieurs mécanismes conduisant à la formation de cette espèce. Un résultat similaire a été observé pour la re-vaporisation d’AgI en présence d’air. Finalement, des calculs à l’équilibre thermodynamique ont été entrepris afin d’identifier les voies réactionnelles principales pouvant conduire à la formation d’I2(g) lors de la re-vaporisation de CsI en présence d’air
In case of a severe nuclear accident on a Pressurized Water Reactor, radioactive fission products can be released in the environment and represent a hazard for the human. In order to better predict the progress of the accident and the release of fission products with the use of dedicated simulation tools, the knowledge of all physicochemical phenomena is necessary. This research is focused on the re-vaporisation, up to 750°C, of iodine-containing fission products’ deposits, particularly CsI and AgI, from the surface of the primary circuit, composed of partially oxidized 304L, 316L steels and Inconel 600 alloy. The results have revealed a strong influence of the re-vaporisation atmosphere composition on the quantities and the chemical species nature of re-vaporized caesium and iodine. In steam atmosphere, iodine and caesium are released integrally from the surface, mainly as CsI. In presence of air, iodine is released integrally, mainly as I2(g), whereas caesium is partially retained on the surface of the steel as caesium chromate, resulting from the interaction between caesium and chromium (III) oxide present in the oxide layer. The use of an online optical spectroscopic technique such as IBB-CEAS allowed to follow the I2(g) re-vaporisation kinetics. The latter exhibits two release peaks, suggesting several mechanisms leading to I2(g) formation. A similar result has been observed during the re-vaporisation of AgI in presence of air. Finally, thermodynamic equilibrium computations have been performed in order to identify the main reaction pathways leading to the formation of gaseous molecular iodine in presence of air
2

Obada, Dorel. "Evaluation de rejets moyen-terme en situation accidentelle grave d’un réacteur à eau pressurisée : étude expérimentale de la re-vaporisation de dépôts de produits de fission (Cs, I)." Electronic Thesis or Diss., Lille 1, 2017. http://www.theses.fr/2017LIL10148.

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En cas d’accident grave sur un Réacteur à Eau Pressurisée, l’évaluation de la quantité d’iode susceptible d’être rejetée dans l’environnement revêt une grande importance du fait de la radiotoxicité et de la volatilité de cet élément. Ainsi, une connaissance de tous les phénomènes physico-chimiques se produisant est nécessaire. Ce travail s’est focalisé sur la re-vaporisation, jusqu’à 750°C, de dépôts des PFs contenant de l’iode, particulièrement le CsI et l’AgI, depuis la surface du circuit primaire composée d’acier 304L, 316L et Inconel 600 partiellement oxydés. Les résultats ont montré une influence significative de la composition de l’atmosphère sur les quantités et les formes chimiques de césium et d’iode re-vaporisés. Ainsi, sous vapeur d’eau l’iode et le césium se re-vaporisent intégralement depuis la surface métallique, sous forme de CsI. En présence d’air, l’iode est relâché intégralement, sous forme d’I2(g) majoritairement, tandis que le césium est partiellement retenu à la surface sous forme de chromate de césium, résultant de l’interaction entre le césium et l’oxyde de chrome (III) de la couche d’oxyde. L’utilisation de la technique de spectroscopie optique en ligne IBB-CEAS a permis d’établir la cinétique de relâchement d’I2(g), celle-ci présentant deux pics de relâchement, indiquant l’existence de plusieurs mécanismes conduisant à la formation de cette espèce. Un résultat similaire a été observé pour la re-vaporisation d’AgI en présence d’air. Finalement, des calculs à l’équilibre thermodynamique ont été entrepris afin d’identifier les voies réactionnelles principales pouvant conduire à la formation d’I2(g) lors de la re-vaporisation de CsI en présence d’air
In case of a severe nuclear accident on a Pressurized Water Reactor, radioactive fission products can be released in the environment and represent a hazard for the human. In order to better predict the progress of the accident and the release of fission products with the use of dedicated simulation tools, the knowledge of all physicochemical phenomena is necessary. This research is focused on the re-vaporisation, up to 750°C, of iodine-containing fission products’ deposits, particularly CsI and AgI, from the surface of the primary circuit, composed of partially oxidized 304L, 316L steels and Inconel 600 alloy. The results have revealed a strong influence of the re-vaporisation atmosphere composition on the quantities and the chemical species nature of re-vaporized caesium and iodine. In steam atmosphere, iodine and caesium are released integrally from the surface, mainly as CsI. In presence of air, iodine is released integrally, mainly as I2(g), whereas caesium is partially retained on the surface of the steel as caesium chromate, resulting from the interaction between caesium and chromium (III) oxide present in the oxide layer. The use of an online optical spectroscopic technique such as IBB-CEAS allowed to follow the I2(g) re-vaporisation kinetics. The latter exhibits two release peaks, suggesting several mechanisms leading to I2(g) formation. A similar result has been observed during the re-vaporisation of AgI in presence of air. Finally, thermodynamic equilibrium computations have been performed in order to identify the main reaction pathways leading to the formation of gaseous molecular iodine in presence of air

Тези доповідей конференцій з теми "Re-vaporisation":

1

Probert, Thomas Arne. "Vaporisation and Condensation in the Feed-Water System in the Turbine Building: How the Phenomenon Arises and How it Can Be Avoided." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81769.

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When restarting Oskarshamn Unit 3 after the re-fuelling outage 2016 a turbine trip occurred at low reactor power. Inspections of the feed-water system in the turbine building revealed a damaged support. A water-hammer caused by an open valve that should have been closed was suspected to be the cause of the damage. Measurement data from the event showed that the pressure in the piping near the damaged support had decreased slowly to be followed by rapid pressure peaks with high amplitudes. The damaged support was reinforced to regain its function and the plant was restarted but an investigation was initiated to analyse the event. A study of measurement data from the plant showed that this was not a single event. Similar events had occurred earlier. The event turned out to be independent of the valve being open or closed. It was also observed that main pumps that were not in operation at the time in the feed-water system had rotated in the reverse direction during the pressure decrease (normally two out of three pumps are in operation). This event could explain a lot of the support damage in the feed-water system that had occurred since the plant was licensed and that was considered to be caused by operational displacements and vibrations. A fruitful and intense collaboration started between Engineering, Operations and Maintenance to find the root cause of the event. This resulted in a number of observations that led to a general understanding of the nature of the event. The event was caused by depressurisation in the feed-water tank caused by a turbine trip at low power. The gradual pressure drop caused the water in the piping lower down to evaporate (flash), causing a mass-flow upwards. When the evaporation stopped the flow changed direction and fell downwards causing condensation and large pressure peaks. The event could be simulated (by RElAP5) with results that qualitatively compared well to measurements. Simulations were then used to show how the event could be mitigated and ultimately avoided. Hopefully future events will be avoided by changing operation procedures. This has been verified when the plant had to shut-down in November 2017 due to a fuel failure. During the shut-down process no flashing event was detected.

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