Relevant bibliographies by topics / Cyclone-30

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Cyclone-30'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Cyclone-30"

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Dare, Richard A., and John L. McBride. "Sea Surface Temperature Response to Tropical Cyclones." Monthly Weather Review 139, no. 12 (2011): 3798–808. http://dx.doi.org/10.1175/mwr-d-10-05019.1.

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Abstract The response of sea surface temperature (SST) to tropical cyclones is studied using gridded SST data and global cyclone tracks from the period 1981–2008. A compositing approach is used whereby temperature time series before and after cyclone occurrence at individual cyclone track positions are averaged together. Results reveal a variability of several days in the time of maximum cooling with respect to cyclone passage, with the most common occurrence 1 day after cyclone passage. When compositing is carried out relative to the day of maximum cooling, the global average response to cyclone passage is a local minimum SST anomaly of −0.9°C. The recovery of the ocean to cyclone passage is generally quite rapid with 44% of the data points recovering to climatological SST within 5 days, and 88% of the data points recovering within 30 days. Although differences exist between the mean results from the separate tropical cyclone basins, they are in broad agreement with the global mean results. Storm intensity and translation speed affect both the size of the SST response and the recovery time. Cyclones occurring in the first half of the cyclone season disrupt the seasonal warming trend, which is not resumed until 20–30 days after cyclone passage. Conversely, cyclone occurrences in the later half of the season bring about a 0.5°C temperature drop from which the ocean does not recover due to the seasonal cooling cycle.
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Cai, Wen Bin, Yuan Gang Xu, and Qi Zhang. "Design of Downhloe Oil-Water Cyclone Separator and the Study of Laboratory Experiment." Advanced Materials Research 339 (September 2011): 630–33. http://dx.doi.org/10.4028/www.scientific.net/amr.339.630.

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The cyclone plays an important role in the downhole oil-water separator during artificial lift for high water cut oil well, the processes of oil-water separation is completing in the cyclone. The oil-water cyclone separator was designed based on the oil and water density contrast and the cyclone separation theory; the laboratory experiment of cyclone separator was carried out and the relationship of the cyclone oil cut of apex and split ratio, oil-water separation efficiency and the velocity , the pressure loss of the cyclone and the velocity were also studied. When the reinjectivity is within 70% of the produced volume, cyclone separator has good water-oil separation ability, split ratio increased with the increase of the vecolity, when the flow vecolity reached 0.25m/s, the split ratio over 30%. But with the increase of the velocity, the increased rate of the split ratio is reduced. The relationship of the flow rate and cyclone intrinsic pressure loss is nonlinear exponential curve.
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Klotzbach, Philip J. "The Madden–Julian Oscillation’s Impacts on Worldwide Tropical Cyclone Activity." Journal of Climate 27, no. 6 (2014): 2317–30. http://dx.doi.org/10.1175/jcli-d-13-00483.1.

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Abstract The 30–60-day Madden–Julian oscillation (MJO) has been documented in previous research to impact tropical cyclone (TC) activity for various tropical cyclone basins around the globe. The MJO modulates large-scale convective activity throughout the tropics, and concomitantly modulates other fields known to impact tropical cyclone activity such as vertical wind shear, midlevel moisture, vertical motion, and sea level pressure. The Atlantic basin typically shows the smallest modulations in most large-scale fields of any tropical cyclone basins; however, it still experiences significant modulations in tropical cyclone activity. The convectively enhanced phases of the MJO and the phases immediately following them are typically associated with above-average tropical cyclone frequency for each of the global TC basins, while the convectively suppressed phases of the MJO are typically associated with below-average tropical cyclone frequency. The number of rapid intensification periods are also shown to increase when the convectively enhanced phase of the MJO is impacting a particular tropical cyclone basin.
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Wu, Liguang, and Bin Wang. "What Has Changed the Proportion of Intense Hurricanes in the Last 30 Years?" Journal of Climate 21, no. 6 (2008): 1432–39. http://dx.doi.org/10.1175/2007jcli1715.1.

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Abstract The recently reported increase in the proportion of intense hurricanes is considerably larger than those projected by the maximum potential intensity (MPI) theory and the results of numerical simulation. To reconcile this discrepancy, the authors examined the best-track datasets for the North Atlantic (NA), western North Pacific (WNP), and eastern North Pacific (ENP) basins. It was found that the changes in the tropical cyclone formation locations and prevailing tracks may have contributed to the changes in the proportion of the intense hurricanes over the past 30 yr. The authors suggest that the changes in the formation locations and prevailing tracks have a profound impact on the basinwide tropical cyclone intensity. Thus, how the atmospheric circulation in the tropical cyclone basins responds to the global warming may be a critical factor in understanding the impacts of global warming on tropical cyclone intensity.
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Choi (Ki-Seon Choi), Jae-Won, Yumi Cha, Hae-Dong Kim, and Riyu Lu. "More intensive summer tropical cyclone near 30°N of East Asia." Dynamics of Atmospheres and Oceans 78 (June 2017): 152–64. http://dx.doi.org/10.1016/j.dynatmoce.2017.05.001.

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Chen, Tsing-Chang, Ming-Cheng Yen, Jenq-Dar Tsay, Nguyen Thi Tan Thanh, and Jordan Alpert. "Synoptic Development of the Hanoi Heavy Rainfall Event of 30–31 October 2008: Multiple-Scale Processes." Monthly Weather Review 140, no. 4 (2012): 1219–40. http://dx.doi.org/10.1175/mwr-d-11-00111.1.

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The 30–31 October 2008 Hanoi, Vietnam, heavy rainfall–flood (HRF) event occurred unusually farther north than other Vietnam events. The cause of this event is explored with multiple-scale processes in the context of the midlatitude–tropical interaction. In the midlatitudes, the cold surge linked to the Hanoi event can be traced westward to the leeside cyclogenesis between the Altai Mountains and Tianshan. This cyclone developed into a Bering Sea explosive cyclone later, simultaneously with the occurrence of the Hanoi HRF event. In the tropics, a cold surge vortex formed on 26 October, south of the Philippines, through the interaction of an easterly disturbance, an already existing small surface vortex in the Celebes Sea, and the eastern Asian cold surge flow. This cold surge vortex developed into a cyclone, juxtaposed with the surface high of the cold surge flow, and established a strong moist southeasterly flow from the South China Sea to Hanoi, which helped maintain the HRF event. Spectral analysis of the zonal winds north and south of the Hanoi HRF cyclone and rainfall at Hanoi reveal the existence of three monsoon modes: 30–60, 12–24, and 5 days. The cold surge vortex developed into an HRF cyclone in conjunction with the in-phase constructive interference of the three monsoon modes, while the Hanoi HRF event was hydrologically maintained by the northwestward flux of water vapor into Hanoi by these monsoon modes.
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Dasar, Mahesh, and Ranjit S. Patil. "Effects of helical fins with semi-circular in cross-section on the performance characteristics of novel finned-cyclone separators." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 17 (2020): 3509–20. http://dx.doi.org/10.1177/0954406220916485.

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Separation of particles (solid) from hot gases were carried out with the help of cyclone separators in most of the power generation industries (fluidized bed boilers) and process industries. Present research focuses on improving the performances of such devices by modifying the geometry. Conventional 2D2D Lapple type cyclone separator geometry was modified by attaching semi-circular cross-section helical fins along the height of barrel wall to make it as finned-cyclone separators. Semi-circular helical fins attached on the barrel wall varies (six-sets) with size (5 mm, 7.5 mm, and 10 mm) and pitch (30 mm and 50 mm). 3D computational fluid dynamics simulations were carried out using ANSYS 15.0 tool and validation were performed with experimental data available in the literature for conventional 2D2D Lapple type cyclone separator before proceeding towards simulations of semi-circular finned-cyclone separators. Improved performance was noticed from all selected six cyclone separators with semi-circular fins (cswf) when compared to conventional cyclone separators while studying the fluid mechanics characteristics, which directly influences on collection-efficiency of cyclone separators. Among selected cyclone separators, the cswf with size of fin 7.5 mm and fin-pitch 50 mm was noted to be performing improved collection efficiency for the particles size <3 µm. Around 5%–11% improved collection efficiency when compared to conventional cyclone separators were observed in the study by fixing the semi-circular fins along the height of barrel wall without disturbing the main role of cyclone separator, which is separating the very fine particles, which would otherwise causes pollution.
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John, J., B. P. Shukla, and R. Kumar. "MULTI-SATELLITE OBSERVATION OF MEGH CYCLONE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-5 (November 19, 2018): 527–30. http://dx.doi.org/10.5194/isprs-archives-xlii-5-527-2018.

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<p><strong>Abstract.</strong> Cyclone Megh, a category-3 (Saffir-Simpson scale) cyclonic storm is regarded as the worst tropical cyclone to ever strike Yemen’s island of Socotra. In this paper, we aim to investigate the wind structure of cyclone Megh using Synthetic Aperture Radar (RISAT-1 SAR) observations. An algorithm for the cyclone wind retrieval has been applied for SAR data of Nov 8, 2015 at 0238:09 UTC in the Arabian Sea. The intensity of cyclone is 30<span class="thinspace"></span>m/s with the 16.65<span class="thinspace"></span>km radius of maximum wind speed from the centre of the cyclone. The high resolution SAR data analysis bring to focus the possible presence of eyewall mesovortex in case of Megh. Recent work has shown that vorticity mixing in the tropical cyclone (TC) inner core can promote mesovortex (MV) formation and impact storm intensity. This has further been corroborated using INSAT-3D and MODIS optical band observations of clouds. Analysis of these satellite derived cloud microphysical properties shows the presence of larger hydrometeors surrounding the eye due to possible embedding of stratus and stratocumulus cloud decks. Thus, this kind of study helps in understanding the microphysical processes within a TC as well estimating their impacts on cyclone intensity and lifetime.</p>
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Anindito, B., T. Nurtono, and S. Winardi. "Using computational fluid dynamics to predict the erosion rates on the cyclones wall for coal boiler plant." Journal of Mechanical Engineering and Sciences 14, no. 4 (2020): 7498–506. http://dx.doi.org/10.15282/jmes.14.4.2020.16.0590.

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In the industrial coal boiler, cyclone is used to separate the silica sands (as fluidizing medium) from the furnace combution gas. A gas-solid separation system with turbulent swirling flow that occurs in the cyclone will cause erosion on the cyclone wall. The erosion will cause a decrease in the cyclone performance and increase the maintenance cost. CFD simulation was conducted to predict this erosion using industrial cyclone in the coal boiler industry on its actual dimensions. The dimensions were 5120 mm in diameter and 13970 mm in height. It was performed using the Reynolds Stress Model (RSM) for turbulence flow in the gas phase and the Oka erosion model. The erosion rate on the cyclone wall was investigated at various gas inlet velocity and solid rate. The inlet velocities ranged from 6 to 8 m/s and the solid rates ranged from 30 to 40 kg/s with silica sands as solid particles (0.075 and 1.5 mm in diameter). At the selected local area, the results showed that the higher gas inlet velocity for the same solid rate would increase the erosion rate (about 25%). However, the higher solid rate for the same velocity will also increase the erosion rate on the cyclone wall (about 18%). These results indicate that cyclone wall errosion are significantly affected by inlet gas velocity.
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Noel, James, and David Changnon. "A Pilot Study Examining U.S. Winter Cyclone Frequency Patterns Associated with Three ENSO Parameters." Journal of Climate 11, no. 8 (1998): 2152–59. http://dx.doi.org/10.1175/1520-0442-11.8.2152.

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Abstract Teleconnections were used to link three El Niño–Southern Oscillation (ENSO) parameters to winter (December–February) cyclone frequencies over the United States during the 1949–96 period. Since each ENSO event is not exactly the same, small subsets of ENSO events were examined in addition to the more common composite ENSO event. Mean winter cyclone frequencies, derived by counting cyclones passing through 30, 5° latitude equal-area circles located in a grid from 70° to 120°W and 30° to 50°N were determined for classes of El Niños and La Niñas based on 1) the intensity of the equatorial Pacific sea surface temperature anomaly, 2) the intensity of the Tahiti–Darwin sea level pressure anomaly, and 3) the location of the 28°C isotherm. The average cyclone count for each class of El Niño and La Niña was compared to the average count for winters when no ENSO event occurred. Expected differences in cyclone frequency patterns when comparing an average of all El Niño winters to all La Niña winters were found; however, large pattern differences were also determined when comparing winters with strong El Niños to moderate–weak El Niños and similarly for La Niñas. Significant differences in number of cyclones were found in 8 of 30 circles located in the Pacific Northwest, the Great Lakes, New England, and the Southeast. The differences found in the cyclone frequency patterns for El Niños and La Niñas of different intensities and locations indicated that using a composite of all El Niños or La Niñas may provide misleading information while examination of each of these parameters independently may assist in the preparation of long-range climate predictions.
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Dissertations / Theses on the topic "Cyclone-30"

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Oberdorfer, F., Q. Akkam, J. Schneider, S. Alyanbawi, and I. Al-Jammaz. "Development of a Krypton target for Cyclone-30 at KFSH&RC." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-165913.

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Introduction Krypton-81m is a radioactive gas with a half-life of 13 s, and found to be useful in many applications in nuclear medicine, particularly for lung perfusion studies and ventilations. Due to high demands for 81mKr, we have developed an automated Krypton system to be installed in one of the Cyclotron’s beamlines at King Faisal Specialist Hospital and Research Centre (KFSH&RC) and to deliver large activity of the radioactive gas. Material and Methods The effective cross section of producing 81Rb is between 15 and 30 MeV [1]. Therefore, range and stopping power of the effective cross section were calculated with respect to gas density of 0.0185 g/cm3. This value is equivalent to gas density at 5.0 bars at room temperature. SRIM calculations resulted in a range of 589 mm. However, due to limitation in fabricating such long target chamber, the target length is chosen to be 250 mm. Attached to the end of target body is a special water circulating flange ‘back-pool’, its purpose is to absorb the rest of the energy and protons Bragg peak. The target body is made of Aluminum with the inner part being electroplated with nickel. The target body is of conical shape. The target body is electrically isolated from other parts to allow accurate beam current reading. Full access to the target loading/unloading steps is made through touch screen technology (FIG. 2) for user access. Additionally, the target control system is designed to be protected through chain of interlock steps. The production cycle of 81Rb is explained as follow. Target is evacuated to approximately 10−3 mbar before being filled with natKr at pressure of 5 bars. At the end of bombardment, recovery of natKr is done via cryogenic vessel. Finally, the radioactivity is washed with KCl and pushed to Hotcells through the nitrogen gas for chemistry processing. Irradiation time was approximately 30 min. Results and Conclusion Experimental results clearly showed a fairly good activity of 81mKr as shown in TABLE 1. In all experiments, the radionuclidic purity of 81mKr was above 99.59%. 79mKr and 79Kr were also measured with a percentage of, respectively, 0.34 and 0.07 %. Special attention has to be drawn to last experiment where the yield significantly in-creased, due to the period where the KCl left inside the target (10 min) before pushing the solution to the Hotcells
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Alrumayan, F., A. Alghaith, Q. Akkam, A. Marsood, and M. AlQhatani. "Development of [NH3] Ammonia target for Cyclone-30 at KFSH&RC." Helmholtz-Zentrum Dresden - rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-165921.

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Introduction Nitrogen [13N] NH3 is a liquid radioisotope, produced by medical cyclotrons for nuclear medicine application and widely applied for evaluation of myocardial perfusion in clinical assessments [1,2]. Owing to its short half-life (10 minutes), the unloading procedure of the radio-active solution of [13N]NH3 from the target is crucial in saving the activity produced for patient. Therefore, an efficient technique in un-loading the radioactive solution from the target body was developed using COMSOL Multiphysics. The new design of the target with improved unloading technique resulted in 30% increase of the available 13N activity. In our experiments, 13N was produced by the 16O(p,α)13N reaction. The energy of proton beam was 16.5 MeV. Material and Methods A 2D model was developed using COMSOL Multiphysics to simulate the inner geometry of [13N] Ammonia target. In the 2D model, water and aluminum were used as materials for the inner body and outer boundary (walls), respectively. The physical equations used to solve the problem of allocating proper place for the loading/unloading opening is turbulent, k-ε Module being extracted from fluid flow module. FIGURE 1 shows the result of simulating water flow on the target water channels. The entrance of the pushing solution (for unloading) was designed to create a turbulent flow inside the target body and, hence, to collect most of the activity inside the target. FIGURE 2 shows the setup for 13N production. A peristaltic pump is used to push the solution after irradiation to the hotcell at 6 ml/min flowrate. The distance from the target to the hotcell is approximately 30 meters. Results and Conclusion FIGURE 3 presents activity produced in milicurie (mCi) for several patient runs. The activity obtained in some experiments reached up to 330 mCi when we irradiated the target with 25 μA for 15 min. This was satisfactory for delivery to the patient at the nuclear medicine department. Moreover, purity of [13N] purity was above 95 % what meets the standard regulation for administration to a patient.
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MATSUDA, HYLTON. "Monitoracao do feixe externo do ciclotron cyclone 30 do IPEN-CNEN/SP." reponame:Repositório Institucional do IPEN, 2002. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10995.

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Oliveira, Henrique Barcellos de. "Modelos análiticos para o desenvolvimento de alvos metálicos de alta performance irradiados nos ciclotrons Cyclone 30 e Cyclone 18 do IPEN-CNEN/SP." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-22092011-095307/.

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Foram desenvolvidos modelos analíticos que descrevem os elementos básicos para irradiações de alvos metálicos em ciclotrons. Parâmetros importantes como valor máximo de corrente de feixe e potência térmica depositada sobre o alvo foram obtidos e confrontados com situações práticas. De forma totalmente inédita, foram determinados analiticamente as características encontradas em situações de intensos transientes térmicos, quando altas concentrações de prótons em uma pequena região do feixe provocam intensos gradientes de temperatura em pequenas regiões do alvo. A comparação dos resultados obtidos com aqueles encontrados na literatura mostraram que os modelos desenvolvidos são satisfatórios, tendo em vista todas as limitações do modelo proposto.<br>Analytical models were developed that describe the basic elements for metal targets irradiation in cyclotrons. Important parameters such as maximum beam current value and thermal power deposited on target were obtained and compared with practical situations. In an unprecedented way, were determined analytically the features found in intense thermal transient situations, when high protons concentrations in a small region of the beam cause intense temperature gradients in small regions of the target. Comparing with results found in the literature showed that the developed models are satisfactory, in view of all limitations of the proposed model.
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OLIVEIRA, HENRIQUE B. de. "Modelos analiticos para o desenvolvimento de alvos metalicos de alta performance irradiados nos ciclotrons cyclone 30 e cyclone 18 do IPEN-CNEN/SP." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9494.

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Sumiya, Luiz Carlos do Amaral. "Estudo de parâmetros relevantes na irradiação de 124-Xe, visando a otimização na obtenção de 123-I ultra puro no Ciclotron Cyclone-30 do IPEN-CNEN/SP." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-06062007-164028/.

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O desenvolvimento da Medicina Nuclear, aliado à evolução dos equipamentos de diagnóstico e terapia, necessita, cada vez mais, da disponibilidade comercial de radioisótopos. Nesse contexto, o IPEN tem buscado atender e abastecer o mercado nacional. Um dos investimentos nesta área foi a aquisição de um ciclotron de 30 MeV, modelo Cyclone-30, que permitiu a produção dos radioisótopos tais como, o 18F, 67Ga, 201Tl e o 123I, sendo este último o foco do presente trabalho. Através de dados de produções rotineiras de 123I via irradiação com prótons em alvo gasoso de Xenônio com enriquecimento superior a 99,8% em 124Xe, foi realizado um estudo para identificar os fatores relevantes que influenciam diretamente o rendimento de obtenção de 123I com altíssimo grau de pureza. Embora a metodologia seja bem conhecida, quando se trata de produção comercial há uma escassez de dados sobre os parâmetros operacionais utilizados. Os parâmetros avaliados foram: pressão do gás 124Xe, intensidade de corrente de feixe de prótons, tempo de irradiação, temperatura de operação do sistema durante a irradiação, tempo de espera para formação de 123I, tempo de aquecimento do porta-alvo para recuperação do 123I formado, temperatura de aquecimento da solução de lavagem e influência do revestimento interno da câmara de irradiação com Ni. Com os resultados obtidos, foi possível alterar as condições operacionais nas produções rotineiras, conduzindo a um aumento de eficiência do processo em torno de 30%.<br>The development of diagnosis equipment and therapy procedures in nuclear medicine depends on the availability of commercial radioisotopes. IPEN is the most important institution that provides radioisotopes for national market. In order to achieve this function, IPEN had invested in the acquisition of a 30 MeV Cyclone-30 cyclotron to produce mainly 18F, 67Ga, 201Tl and 123I. The 123I production is the aim of the present work. With the 123I routine production data obtained by proton irradiation of Xe targets with an enrichment greater than 99.8%, it was possible to identify the important parameters that have direct influence on the production yield of high purity degree 123I. Even though the methodology for the commercial production of 123I, there are an scarcity of operational parameters data for this task. In this work the evaluated parameters were: 124Xe pressure, proton beam quality, irradiation time, operational temperature of the irradiation system under irradiation, waiting time to obtain 123I, temperature of washing solution and the impact of the internal Ni coating in the target. With the obtained results it was possible to modify the operational conditions for routine production and increasing the efficiency in about 30%.
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Costa, Osvaldo Luiz da. "Otimização do sistema de carga e descarga no porta-alvo de irradiação de H218O utilizando a produção de 18F- no Cíclotron Cyclone 30 do IPEN-CNEN/SP." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-29062009-153847/.

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O aumento da demanda no Brasil pelo radiofármaco [18F]FDG para exames de tomografia por emissão de pósitron (PET-CT) e sua meia-vida de 109,7 minutos exigem uma atenção especial para a cadeia produtiva deste radiofármaco. Desde a irradiação da água enriquecida em 18O até a passagem do paciente pelo tomógrafo, numa seqüência de procedimentos que pode durar até cerca de seis horas, todas as etapas da cadeia produtiva devem ter a maior confiabilidade possível, pois qualquer falha em uma das etapas será sentida na extremidade da cadeia produtiva. A falta de indicação de posição da válvula do Sistema de Carga e Descarga do Porta-alvo de 18F- no Centro de Aceleradores Cíclotron levou a perda de produção de 18F-, contaminação da Sala de Irradiação e aumento da dose dos trabalhadores envolvidos na operação e manutenção dos sistemas de irradiação. Este trabalho testou o comportamento de três tipos de sensores de posição (microswitch, reedswitch e sensor de proximidade indutivo) no ambiente da Sala de Irradiação 1.2 do Centro de Aceleradores Cíclotron, que está sujeito a altas taxas de radiação gama e nêutrons devido à produção rotineira de 18F- e 123I, através deste teste foi possível encontrar o sensor de posição mais adequado para trabalhar no porta-alvo de 18F-, e através da reprogramação do controlador lógico programável, foi possível evitar este tipo de falha durante a produção de 18F- no Centro de Aceleradores Cíclotron, e aumentar a confiabilidade na cadeia produtiva do [18F]FDG.<br>The demand growing in Brazil by the radiopharmaceutical [18F]FDG in positron emission tomography (PET-CT) and the 109,7 minutes half life claim special attention to the productive chain of this radiopharmaceutical. Since the [18O]water irradiation until the tomograph patient scanning, in sequential procedures that may spent about six hours, all the productive chain stages must be as reliable as possible, because any stage failed will be perceived in productive chain extremity. The position indication absence from Load and Unload 18F- Target System valve in Cyclotron Accelerators Center resulted in 18F- production loss, Irradiation Room contamination and the increase workers dose responsible by operation and maintenance of irradiation systems. This study tested the behaviour of three types of position sensors (microswitch, reedswitch and inductive sensor), into Irradiation Room 1.2 environment of the Cyclotron Accelerators Center, where there are high gamma radiation and neutrons rates because the routine 18F- and 123I production, through this test was possible to discover the fitter position sensor to run on 18F- Target, and after rewriting the programmable logic controller software was possible avoid this type of fail at 18F- production time in Cyclotron Accelerators Center, and to grow up the reliability on [18F]FDG productive chain.
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SUMIYA, LUIZ C. do A. "Estudo de parâmetros relevantes na irradiação de sup(124)Xe, visando a otimização na obtenção de sup(123)I ultra puro no ciclotron cyclone-30 IPEN-CNEN/SP." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11477.

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COSTA, OSVALDO L. da. "Otimizacao do sistema de carga e descarga no porta-alvo de irradiacao de Hsub(2) sup(18)O utilizado para a producao de sup(18)F no ciclotron cyclone 30 do IPEN-CNEN/SP." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9357.

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Made available in DSpace on 2014-10-09T12:26:13Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:10:09Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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Book chapters on the topic "Cyclone-30"

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Szymański, M., and B. Wiśniewski. "Avoidance of the Tropical Cyclone in Ocean Navigation." In Marine Navigation. CRC Press, 2017. http://dx.doi.org/10.1201/9781315099132-30.

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"McLuhan Watch 14–15 periodicals: À la page 59; L’Actualité macluhanisme 3, 5, 8, 22, 40ff, 104; 6; Arguments 24; Artforum 2; Art & as cyclone 34, 36–7; and écriture Text 3; L’Aurore 5; Beyond 14; Blast 37; as philosophical bomb 105; 56; C Theory 11; CJPST 11, 17, 69; poltergeists of 106 Carrefour 5, 105, 120; Critique 4, M(a)cLuhanites 7, 85, 106 18; Le Devoir 5, 119; Dew-Line Mcreader 61 Newsletter 1, 15, 50, 72; Combat 24, Mcwork 12 120; Economist 3; Elle 24; Esprit masses 3; mass form 94–5; see also 24; Explorations 1, 13, 16, 107, 110; implosion L’Express 5; Le Figaro 4, 24, 50; media: environments 1, 8, 12, 14, 38, 27, Figaro Littéraire 120; Flash Art 2; 29; structure of 19, 38; Forces 6, 99, 100; Fortune 24; technologies 29, 67 Impulse 3; Life 24; Les lettres misnomers: existentialist 25; nouvelles 75; Le Monde 5, 16, 74, phenomenologist 21–2; 25–6; 121; Nouvel Observateur 57, 119; structuralist 25–6 On the Beach 3; Parachute 3; Paris MM 59 Match 24; Partis Pris 5; Playboy M.McL. 62 99, 102; La Presse 5, 100, 119; La Moog synthesizer 10; ambient Quinzaine littéraire 4, 18; Reader’s soundscapes 11–12 Digest 24; Science et Vie 5; Sept-mosaic method 5, 25; and sociology 18 Jours 5; Tel Quel 38; Time 24, 27, multiplexage analogique de 28; TLS 34; Toronto Star 20; composantes (MAC) 48 Toronto Telegram 47; Traverses 82; mythologies 21, 24–5, 30–2; political Utopie 83; Varsity Graduate 16; mythology 29; and sociology 30 Wired 1, 13, 105 Phase Alternative Line (PAL) 48 Narcissus 68 postmodernism 4, 8, 11, 23, 64–67, 111; anti- 38; and late capitalism 10, 111–12; neo-baroque 25; objet petit a 7, 52, 54, 59, 60, 63; little a potlatch 4; triphasic models 99, 54; objet petit tas 52; sublime object 112–13, 116 59 potentialization 8 Office de radiodiffusion-télévision primitivism 106ff; postmodern 70; see française (ORTF) 44, 46, 56, 57 also tribalism Ontario Science Centre (OSC) 10 probe 12, 80 orality 39–41, 43, 49, 50, 63, 100, psychoanalysis 19, 53, 56, 63, 110; 107; as web 39 rationalisation 38 panic 64–6 Québec 1, 99; Concordia University 9; participation 13, 71, 83, 86, 88, 92; French Canadian culture 91–2, 99; referendum mode 89; simulation of Hydro-Québec 6, 100; Montréal 4– 87 5, 104; nationalism 91, 100, 102; pataphysics 55 October Crisis 104; racist." In McLuhan and Baudrillard. Routledge, 2002. http://dx.doi.org/10.4324/9780203005217-19.

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Conference papers on the topic "Cyclone-30"

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Moallemi, Alireza, Maysam Saidi, and Hassan Basirat Tabrizi. "Humidity Effect on the Separation Efficiency of Cylindrical Cyclone Separator." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37284.

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In order to evaluate the humidity effect on the performance of a gas-solid cyclone, an experimental setup is designed including a cylindrical cyclone with a tangential inlet, air compressor, humidifier, flow meter and injector of particles with known properties. The cyclone body is a cylinder with diameter and height of 50 and 150 mm, respectively and the rectangular inlet with dimension of 10 mm × 22 mm. The solid particles used in the experiments are cement because of the application of cyclones in air purification in cement industry. The injection of particle is performed with a controlled rate. A humidifier device increases the relative humidity of the inlet flow from 30 to 100 percent. Separation efficiency is defined as the ratio of collected to injected particles and calculated for different inlet airflow rates for dry and humidified conditions. Obtained results for this experiment indicates humidity has a favorable effect on increasing the efficiency of a cyclone separator. Although increasing the humidity of the air increases the density, which has an adverse effect on the separation efficiency, it is negligible in contrast to its benefits on agglomeration of particles.
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Lerch, Andreas, Heinz-Peter Schiffer, and Daniela Klaubert. "Impact on Adiabatic Film Cooling Effectiveness Using Internal Cyclone Cooling." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45120.

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The internal heat transfer of turbine blades can be augmented using cyclone cooling, but the consequential impact on the external film cooling may be significant. To determine these effects, the distribution of adiabatic film cooling effectiveness was measured on the surface of a symmetrical blade model containing a cylindrical leading-edge channel. This channel feeds one row, respectively two opposite rows, of eight cooling holes each. Inside this channel two different types and directions of swirl are generated. The resulting adiabatic effectiveness distributions, which are measured using the calibrated ammonia diazo technique, are compared to those measured with a channel flow without swirl (datum configuration). The operating points are defined by blowing ratio (0.6–1.0) and film cooling discharge coefficient (20%–50%). A high full-range resolution over the adiabatic effectiveness is achieved using a weighting average method with multiple experiments per operating point. The lateral-averaged adiabatic effectiveness is presented up to 30 diameters downstream of the cooling holes. These effectiveness values show a high dependency on the configurations and reach values of about 0.3 to 2 times the reference configuration values. This is due to the strong variation of the flow structure inside the cooling holes. PIV-measurements and basic numerical simulations of the channel flow structure and dynamic pressure measurements at the cooling hole exits are carried out to support the results of film cooling effectiveness.
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Wolski, N., R. Berger, J. Maier, and K. R. G. Hein. "Bubbling Fluidized Bed Co-Combustion of Different Sustainable Fuels: Trace Element Behaviour." In 17th International Conference on Fluidized Bed Combustion. ASMEDC, 2003. http://dx.doi.org/10.1115/fbc2003-131.

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With this paper the author will show interesting results of the co-combustion of coal in combination with bark and paper sludge in fluidized bed combustion. The results presented were collected during two measurement campaigns at a 30 kW electrically stabilized bubbling fluidized bed. The fluidized bed combustor was compared to large scale combustors in different campaigns before and thus gives an idea of the output of industrial plants. The main focus of the measurements was the behavior of trace elements of Ni Pb, Zn, Cr and Cu with a changing bed material. One bed material was pre-used under the exposure of combustion of a ternary fuel mixture of coal, bark and paper sludge over a long period of time resulting in a bed composition of 2/3 SiO2 and 1/3 Al2O3. The second bed material utilized, which was a sand (primarily SiO2) not used before thus not enriched in any compounds. When comparing the results of all trials three different trace metal partitioning effects were monitored. First an increase in the elemental concentration in the bed material which was primarily due to the higher input concentration with the pre-used bed material which was found for all three alternatives plus a decrease in filter and cyclone concentrations (Ni, Pb). Secondly an increase in all three ash fractions was detected for Cu. The third was a mixture of both with increasing filter concentrations but decreasing cyclone concentrations (Zn, Cr). An attempt was made to link the before primarily to the enrichment in Al-compounds and to a bed capacity of retention. The results presented indicate the need for longer periods of testing even at small scaled facilities if the comparison to large scale facilities is attempted.
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Lingjuan Wang, Calvin B. Parnell, Jr., Bryan W. Shaw, and Ronald E Lacey. "Analysis of Cyclone Collection Efficiency." In 2003, Las Vegas, NV July 27-30, 2003. American Society of Agricultural and Biological Engineers, 2003. http://dx.doi.org/10.13031/2013.15040.

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Luecke, Karsten, Ernst-Ulrich Hartge, and Joachim Werther. "Modeling of Solids and Gas Mixing Effects in Large-Scale CFB Combustors." In 17th International Conference on Fluidized Bed Combustion. ASMEDC, 2003. http://dx.doi.org/10.1115/fbc2003-028.

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In a CFB combustor the reacting solids are locally fed into the combustion chamber. These reactants have to be dispersed across the reactor’s cross-sectional area. Since the rate of mixing is limited this leads to a mal-distribution of the reactants and to locally varying reaction conditions. In order to describe the influence of mixing a three-dimensional model of the combustion chamber is suggested here. The model is divided into three sub-topics. First, the flow structure in terms of local gas and solids velocities and solids volume concentrations is described. Second, mixing of the solids and the gas phase has to be quantified by defining dispersion coefficients, and finally the combustion process itself, i.e. the reaction kinetics, has to be modeled. Employing the information of the three sub-models mass balances for the reactants at each finite control volume inside the CFB combustion chamber can be formulated. The model was validated against data from measurements in the large-scale combustor of Chalmers University of Technology in Go¨teborg/Sweden. Concentration gradients concerning the char phase are only moderate. However, the spatial distribution of the oxygen shows strong non-uniformities, especially under conditions of staged combustion. In further predictive calculations, the influence of the fuel supply arrangement on the emissions of industrial sized CFB boilers was studied. Furthermore, the influence of the fuel composition on the feeding technique has been examined. High volatile fuels tend to form plumes of unburned hydrocarbons near the fuel feed point, and might therefore need more feed points per square meter cross-section area. Since the average gas residence time in the primary cyclone of a CFB plant is about 30–40% of the total gas residence time, a considerable burn-off of not completely oxidized gas species may occur here. An effectively used cyclone may remedy to a certain extent the negative impacts of incomplete mixing in the combustion chamber.
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Adams, Bradley, Marc Cremer, James Valentine, et al. "Use of CFD Modeling for Design of NOx Reduction Systems in Utility Boilers." In 2002 International Joint Power Generation Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ijpgc2002-26081.

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CFD modeling has found increasing use in the design and evaluation of utility boiler retrofits, combustion optimization and NOx reduction technologies. This paper reviews two recent examples of CFD modeling used in the design and evaluation of NOx reduction technologies. The first example involves the staging of furnace combustion through use of overfire air (OFA) to reduce NOx emission in a B&amp;W opposed-wall fired pc furnace. Furnace simulations identified locations of highest flue gas mass flows and highest CO concentrations and were used to identify OFA port placement for maximum NOx reduction with lowest increases in unburned carbon in fly ash and CO emission. Simulations predicted a 34% reduction in NOx emission with OFA. The second example summarizes the design and application of RRI with OFA and SNCR in a 138 MW cyclone-fired boiler. Simulations were used to design an aminebased injection system for the staged lower furnace and to evaluate NOx reduction and ammonia slip of the RRI system. Field-testing confirmed modeling predictions and demonstrated that the RRI system alone could achieve 25–30% NOx reduction beyond OFA levels with less than 1 ppm ammonia slip and that RRI in combination with SNCR could achieve 50–55% NOx reduction with less than 5 ppm slip.
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Dabirian, Ramin, Ardian Nababan, Ilias Gavrielatos, Ram S. Mohan, and Ovadia Shoham. "Foam Breakup in CFC/GLCC© System." In ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/fedsm2018-83315.

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Foaming is a common phenomenon in the petroleum industry. Foams can be desirable for drilling applications, whereby the cutting bits are lubricated, and cuttings are carried up to the surface. However, foam can be undesirable for production operation, which hinders the gas-liquid separation process. Experimental investigation has been conducted on foam break-up in a standalone Churn Flow Coalescer (CFC), a standalone Gas Liquid Cylindrical Cyclone (GLCC©) and a combined CFC/GLCC© system. A 1-inch Foam Characterization Rig (FCR) is utilized. The FCR is equipped with a 3-inch diameter CFC, which is connected in series to a 2-inch diameter GLCC©. A total of 30 experimental runs are conducted for both Gas Mode (GM) and Liquid Mode (LM) operations. A surfactant (SI-403) with concentration of 0.025%, superficial liquid velocities of 0.1 and 0.15 m/s and superficial gas velocities of 0.5, 1, and 1.5 m/s are used in the experiments. The experimental results show that for the GM operation, the foam break-up in combined CFC/GLCC© system is more efficient than that in the standalone GLCC©, for the same flow conditions. Lowering the superficial gas velocity or increasing the superficial liquid velocity produce less stable foam, larger gas bubbles and lower half-life time. The outlet clear liquid flow rate (with no foam) under the LM operation increases with increasing superficial liquid velocity or decreasing superficial gas velocity. The recommended operational conditions for the CFC are at low superficial gas velocities, lower than the transition boundary to churn flow in the CFC.
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Nam, Hyungseok, Amado Maglinao, and Sergio Capareda. "Fluidized Bed Air Gasification Using Low Heating Value Sand-Bedded Dairy Manure and Sludge Pellets." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50513.

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Solid manure handling is a major environmental issue confronting animal facilities in the United States. One difficulty in using dairy manure as a fuel source is the presence of sand bedding used for lactating dairy cows. More than 30% of dairy farms use sand beds for a dry and clean environment that prevents bacterial growth [1]. In this study, dairy animal manure obtained directly from waste lagoons was used for the air gasification process. The manure was dried to reduce the moisture down to 5% and a sand separating system was designed to remove some sand bedding materials. Preliminary air gasification experiments showed that the direct use of dairy manure containing 75% ash content, that reflect high sand content, reduced the temperature of the reactor. The study is also aimed at handling unprocessed dairy manure and generating electric power for the on-site use. A high heating value manure is needed to run the gasifier and the produced synthesis gas (or syngas) is fed to an engine coupled with a generator. Some dairy manure gasification work were done using fresh dairy manure. The highest heating value from the dairy manure biomass was found to be 4.5MJ/kg in a fixed-bed gasifier [2]. Another gasification study using a fluidized-bed reactor could produce syngas heating value as high as 4.7MJ/m3 from dairy manure [3]. A bench-scale fluidized bed containing a 3-inch diameter reactor tube with a cyclone and a scrubber was used to gasify dairy manure using air at different temperatures. The sand separated dairy manure used in this study contained approximately 45% ash content. The maximum heating value of the synthesis gas was 3.8MJ/m3 at an operating temperature of 750°C. The syngas will need to be upgraded. To upgrade the synthesis gas heating value, sludge pellets of 18.7MJ/kg were mixed with the dairy manure in different ratios of 10% and 30%. The syngas heating values from mixed manure with sludge pellet were increased to 5MJ/m3 with 10% sludge, and 5.7MJ/m3 with 30% sludge. The sludge used has higher heating value resulting in higher gas HV. The cold gasification efficiency was achieved as high as 36±5% with dairy manure mixed with sludge pellet. At a higher operating temperature, higher efficiency was obtained with increased gas composition of hydrogen and carbon monoxide. This syngas may then be used for power generation as well as possible input gas for the Fisher Tropsch process for liquid biofuel production. The result of the experiments will be a cornerstone for the widespread application of low heating value animal waste for producing high heating value syngas that may be used for electric power generation as a result of various upgrading processes.
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Wan, Ping K., Alice C. Carson, and Desmond W. Chan. "Climate Change Considerations in Sustainable Development of Nuclear Power Plants in the United States." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29331.

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Nuclear power generation has become an increasingly attractive alternative in the global power market due to growing demand for electric power, increasing global competition for fossil fuels, concern over greenhouse gas emissions and their potential impact on climate change, and the desire for energy independence. Nuclear energy plays an integral role in providing carbon free energy for sustainable development of global electric power generation. Assuring the protection of people and the environmental is a prime consideration in the design, construction, and operation of nuclear power plants. Potential environmental and safety concerns must be carefully evaluated and addressed. In order to assure that the nuclear power plant designs are sufficiently robust, the U.S. Nuclear Regulatory Commission (USNRC) requires that applicants for early site permits (ESP) and construction/operating licenses (COL) identify the most severe natural phenomena historically reported for the site and surrounding area to ensure sufficient design margin exists, considering the limited accuracy, quantity, and time in which the associated data has been collected. Because these permits are valid for a period up to 40 years, the potential impacts of climate change on the severity of natural phenomena, as it relates to the design basis and nuclear safety and environmental impacts are of increasing interest. Although no conclusive evidence or consensus of opinion is available on the long-term climatic changes resulting from human or natural causes, the USNRC has requested that climate change forecasts be considered for their potential affecting the most severe natural phenomena. The specific subject areas of concern include: • Extreme temperature and extreme precipitation (liquid &amp; frozen) statistics – review 100 years of data around the site versus a review of the previous 30 years of data. • Extreme wind/basic wind speed – review previous 100 years of tropical cyclone data (including hurricanes) in the site vicinity versus previous 30 years of data. • Tornado – review of frequency and intensity trends and forecasts. • Drought – review of water availability / water supply during drought conditions and drought of record. • Stagnation Potential – review of conditions that would result in restrictive dispersion of greenhouse gas emissions. This paper examines the challenges and constraints in identifying and developing appropriate design- and operating-basis site/regional meteorological conditions while accounting for potential climate change during preparation of an ESP and/or COL. Because there is no regulatory guidance or quantitative acceptance criteria currently available, the methodology used to address climate change in a recent issued ESP will be discussed as an example.
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Reinoso, Antonio, Luis E. Gomez, Shoubo Wang, Ram S. Mohan, Ovadia Shoham, and Gene Kouba. "Design and Performance of Slug Damper." In ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29387.

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A novel flow conditioning device, namely, the slug damper, which can be used upstream of compact separation systems, is investigated theoretically and experimentally. In the experimental part, a 3” ID slug damper facility has been installed in an existing 2” diameter two-phase flow loop. This flow loop includes an upstream slug generator, a Gas-Liquid Cylindrical Cyclone (GLCC©) attached to the slug damper downstream, and a set of conductance probes for measuring the propagation of the dissipated slug along the damper. Over 200 experimental runs were conducted with artificially generated inlet slugs of 50 ft length (Ls/d = 300) that were dumped into the loop upstream of the slug damper, varying the superficial liquid velocity from 0.5 to 2.5 ft/s and superficial gas velocity between 10 to 40 ft/ (in the 2” inlet pipe) and utilizing segmented orifice opening heights of 1”, 1.5”, 2” and 3”. For each experimental run, the measured data included: propagation of the liquid slug front in the damper, differential pressure across the segmented orifice, GLCC liquid level, GLCC outlet liquid flow and static pressure in the GLCC. The data prove that the slug damper is capable of dissipating long slugs, ensuring fairly constant liquid flow rate into the downstream GLCC. Also, the damper capacity to process large slugs is a strong function of the superficial gas velocity (and mixture velocity). The theoretical part includes the development of a mechanistic model for the prediction of the hydrodynamic flow behavior in the slug damper. The model enables the predictions of the outlet liquid flow rate and the available damping time, and in turn the prediction of the slug damper capacity. Comparison between the model predictions and the acquired data reveals an accuracy of 30% with respect to the available damping time and outlet liquid flow rate. The developed model can be used for design of slug damper units in the field.
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Reports on the topic "Cyclone-30"

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Evaluation, engineering and development of advanced cyclone processes. Quarterly progress report, July 30, 1995--September 30, 1995. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/230283.

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Evaluation, engineering and development of advanced cyclone processes. Quarterly report, July 1, 1994--September 30, 1994. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/211638.

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Evaluation, engineering and development of advanced cyclone processes. Quarterly progress report, April 1, 1995--June 30, 1995. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/230284.

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Evaluation, engineering and development of advanced cyclone processes. Quarterly technical progress report No. 4, July 1, 1991--September 30, 1991. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/10110209.

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Evaluation, engineering and development of advanced cyclone processes. Quarterly technical progress report No. 15, April 1, 1994--June 30, 1994. Office of Scientific and Technical Information (OSTI), 1994. http://dx.doi.org/10.2172/210924.

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