Tesis sobre el tema "Sumpf"
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Grahn, Alexander, Greg Cartland-Glover y Eckhard Krepper. "CFD Modellierung einer partikelbelasteten Kühlmittelströmung im Sumpf und in der Kondensationskammer". Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-27796.
Texto completoGrahn, Alexander, Greg Cartland-Glover y Eckhard Krepper. "CFD Modellierung einer partikelbelasteten Kühlmittelströmung im Sumpf und in der Kondensationskammer". Forschungszentrum Dresden-Rossendorf, 2009. https://hzdr.qucosa.de/id/qucosa%3A21606.
Texto completoRuhnke, Norman [Verfasser], Bernd [Akademischer Betreuer] Sumpf, Bernd [Gutachter] Sumpf, Günther [Gutachter] Tränkle y Paul Michael [Gutachter] Petersen. "A deep ultraviolet laser light source by frequency doubling of GaN based external cavity diode laser radiation / Norman Ruhnke ; Gutachter: Bernd Sumpf, Günther Tränkle, Paul Michael Petersen ; Betreuer: Bernd Sumpf". Berlin : Technische Universität Berlin, 2020. http://d-nb.info/1219573914/34.
Texto completoSumpf, Tilman [Verfasser] y Meinhard [Akademischer Betreuer] Schilling. "Model-based T2 Relaxometry using Undersampled Magnetic Resonance Imaging / Tilman Sumpf ; Betreuer: Meinhard Schilling". Braunschweig : Technische Universität Braunschweig, 2012. http://d-nb.info/1175822620/34.
Texto completoSchmid, Martin. "Morphologie, Vergesellschaftung, Ökologie, Verbreitung und Gefährdung der Sumpf-Löwenzähne (Taraxacum sect. Palustria Dahlst., Asteraceae) Süddeutschlands /". Stutttgart : Schweizerbart, 2003. http://catalogue.bnf.fr/ark:/12148/cb39146354t.
Texto completoHaldemann, Christoph. "Veränderungen der Kohlehydrat-, Protein- und Aminosäurengehalte in Sumpf- und Röhrichtpflanzenrhizomen am natürlichen Standort und nach experimentell bedingtem O₂-Mangelstress /". [S.l : s.n.], 1987. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.
Texto completoTawfieq, Mahmoud [Verfasser], Günther [Akademischer Betreuer] Tränkle, Günther [Gutachter] Tränkle, Paul Michael [Gutachter] Petersen y Bernd [Gutachter] Sumpf. "Development and characterisation of a diode laser based tunable high-power MOPA system / Mahmoud Tawfieq ; Gutachter: Günther Tränkle, Paul Michael Petersen, Bernd Sumpf ; Betreuer: Günther Tränkle". Berlin : Technische Universität Berlin, 2019. http://d-nb.info/1182423795/34.
Texto completoSumpf, Kristina [Verfasser], Carsten [Akademischer Betreuer] Lüder, Thomas [Gutachter] Meyer y Martin [Gutachter] Oppermann. "Einfluss von HDAC-Inhibitoren auf die Expression IFNγ-regulierter Gene und die Parasitenentwicklung in Toxoplasma gondii-infizierten Makrophagen / Kristina Sumpf ; Gutachter: Thomas Meyer, Martin Oppermann ; Betreuer: Carsten Lüder". Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1149958677/34.
Texto completoSumpf, Birthe Inken [Verfasser]. "Untersuchung von TEMRA-Zellen und deren Subsets in Patienten mit schwerer Aortenklappenstenose sowie die vergleichende Untersuchung von zwei unterschiedlichen Behandlungsmethoden im Hinblick auf das adaptive Immunsystem / Birthe Inken Sumpf". Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1160235694/34.
Texto completoBackéus, Ingvar. "Aboveground production and growth dynamics of vascular bog plants in central Sweden". Uppsala : Stockholm : Svenska växtgeografiska sällskapet ; Almqvist & Wiksell International [distributor], 1985. http://catalog.hathitrust.org/api/volumes/oclc/12807002.html.
Texto completoMelander, Texas. "Design of a Mobile Pump Sump". Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-201650.
Texto completoIn mining it is required that the ground water is pumped away and it is done by a system of pumps placed in blasted sumps where water is collected. These pits are large and expensive to make and they often suffer from problems with sedimentation. When a tunnel no longer is being used it often refilled with rocks and all the work and money put into blasting the sumps is lost. This has led to that Xylem wants to test a concept with a mobile pump sump that can be reused in another location.This report describes the process where a mobile pump sump has been developed whit starting point from Xylem’s product series TOP. The TOP-series consists of prefabricated pump sumps intended for sewage systems. The sumps are designed to be placed under the ground and when they are buried all access is given from above via a service hatch.A simulation of a series of pumps was made to investigate what an appropriate sump volume would be and when that was decided the other parts of the sump was modified to suit the intended purpose. In addition to this a mobile unit on which the sump is mounted was designed. This unit includes a service platform and a protective frame and it also enables lifting with a forklift.
Bockman, Samuel Jacob. ""Sump-Inlet" deployment linkage design for sargassum ocean sequestration (SOS)". Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123255.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (page 42).
Invasive floating sargassum seaweed has become a serious problem for Caribbean nations due to the blocking of fisheries and distinct rotten smell that disincentivizes tourism to these countries. The solution to this problem conceived in Luke Gray's master's thesis was to pump the sargassum to a depth where the hydrostatic pressure is sufficiently greater than the sargassum bladder internal pressure such that the bladders are compressed, and the plant sinks [1]. This would be achieved by feeding a mixture of sargassum and seawater through a suction hose to an onboard solids pump, which then transports the sargassum to a depth where the hydrostatic pressure renders the sargassum negatively buoyant. One inlet device, discussed in Gray's thesis, is called the "sump-inlet" which operates much like an oil skimmer, controlling and enforcing a high solids concentration by locating a weir close to the free surface of the water. Once sargassum and seawater flows over the weir, into the sump, the sargassum is dragged downward toward suction piping, against its natural rate-of-rise, due to the constrained cross-sectional area of the sump and the high downward fluid velocity. With this method chosen, a single DOF linkage system was needed to deploy the sump-inlet and constrain it during operation. The hydrodynamic response of this linkage must ensure that the weir stays at an acceptable depth, in as wide a range of sea states as possible, to avoid inconsistent solids concentration and dry-running. Dimensions and mass properties of the sump-inlet linkage were informed by Gray's hydrodynamics model [1]. This thesis focuses on structural analysis of the deployment linkage, deck frame, attachments, and pivot.
by Samuel Jacob Bockman.
S.B.
S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering
Baraghini, Beatrice. "Experimental investigation on the factors governing groundwater control by sump pumping". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amslaurea.unibo.it/1335/.
Texto completoHoppe, Mark Mathew. "Validation of computational fluid dynamics model of a simple pump sump with vertical intake". Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86337.
Texto completoENGLISH ABSTRACT: The designs of pump intake structures are generally verified by means of a hydraulic model study to ensure the structure will operate without large air or swirl entraining vortices. This is an expensive and time consuming process. The popularity of Computational Fluid Dynamics (CFD) is ever increasing in the engineering world and the use thereof in the modelling of flows in pump intake structures is just one of the many areas of focus. The use of a validated CFD model in the design phase of pump intakes would be beneficial, and ideally would reduce the frequency of requiring hydraulic model studies. This study investigates the applicability of using a 3 dimensional CFD model as a design tool by validation with a physical model. A physical model of a simple pump intake was available and with a few modifications the flow conditions were significantly improved. The quantitative validation of the CFD model was carried out by means of comparing corresponding point velocity magnitudes. An Acoustic Doppler Velocimeter (ADV) was used in the physical model. The data obtained were successfully filtered to remove noise and other disturbances. The qualitative validation was done by means of photographs and observations. The photographs made use of illuminated tracer particles to identify flow patterns. The CFD model compares well qualitatively, but the velocity magnitudes are not yet sufficiently reliable. It is recommended that the CFD model can be used for qualitative studies, but future research should focus on the accuracy of the CFD model. Using higher resolution velocity measurements in the physical model by means of other types of instruments, a better comparison can be made, as well as enabling validation of the ADV readings.
AFRIKAANSE OPSOMMING: Die ontwerpe van die pomp inname strukture word gewoonlik bevestig deur middel van 'n hidrouliese model studie om lug-intrekking te minimeer. Dit is 'n duur en tydrowende proses . Die gebruik van Computational Fluid Dynamics ( CFD ), ‘n tipe numeriese modelle neem toe in die ingenieurswese wêreld. Die gebruik daarvan in die modellering van vloei in pomp inname strukture is net een van die vele areas van toepassing . Die gebruik van 'n betroubare CFD model in die ontwerp fase van pomp innames sal voordelig wees , en ideaal sou die noodaaklikheid van fisiese hidrouliese model studies verminder. Hierdie studie ondersoek die toepaslikheid van die gebruik van 'n 3 -dimensionele model CFD model as 'n ontwerp instrument deur bevestiging met 'n fisiese model . 'n Eenvoudige pomp-inname model was beskikbaar en het met ‘n paar veranderinge die vloei toestande aansienlik verbeter . Die kwantitatiewe bevestiging van die CFD model is uitgevoer deur middel van vergelyking van korresponderende punt snelheid groottes. In die fisiese model is die snelhede met 'n Akoestiese Doppler Velocimeter (ADV) gemeet. Die data wat verkry is suksesvol gefiltreer om geraas en ander versteurings te verwyder . Die kwalitatiewe bevestiging is gedoen deur middel van foto's en waarnemings. In die foto's is gebruik gemaak van verligte spoor deeltjies om vloei patrone te identifiseer. Die CFD model vergelyk kwalitatief goed, maar die snelheid groottes is nog nie voldoende betroubaar nie. Dit word aanbeveel dat die CFD model gebruik kan word vir kwalitatiewe studies, maar toekomstige navorsing behoort te fokus op die verbeteringe van dieakkuraatheid van die CFD model. Met behulp van 'n hoër resolusie snelheid metings van die fisiese model, deur middel van ander tipe instrumente, kan 'n beter vergelyking gemaak word , sowel as die geldigheid van die ADV lesings in staat te stel.
Liapis, Evagelos. "The supF assay for understanding DNA adduct-induced mutagenesis : traditional application and development of a site-specific version". Thesis, University of Leicester, 2007. http://hdl.handle.net/2381/29719.
Texto completoStjern, Magnus y Aldenfalk Staffan Jansson. "Investigation of pattern recognition algorithms to determine depth and volume of water inside the sump of a pumping station". Thesis, KTH, Radio Systems Laboratory (RS Lab), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149256.
Texto completoMönsterigenkänning betraktas numera som en grundläggande byggsten inom många områden. Möjligheten att kunna interagera med en dator eller vice versa är inte längre begränsat av datorkraft, utan snarare av vilken slags applikation en utvecklare kan komma på. Idag kan många moderna realtidsapplikationer, såsom högpresterande datorer och högkvalitativ grafik kombineras med en Xbox Kinect för att utföra objektspårning och Google Glass för att åstadkomma en huvudburen display. Dessa applikationer kan även kombineras med andra sensorer samt manöverdon för att skapa övervakningssystem som kan ge anläggningsoperatörer möjlighet till fjärrövervakning i en anläggning. För att beräkningsmässigt kunna tolka rörelser eller mönster i en bild är det nödvändigt att utforska tillämpningen av denna teknologi. Forskningen utförd på Xylem har fokuserat på ett väldigt specifikt problem: Hur kan mönsterigenkänning användas för att dynamiskt detektera volymen och vattendjupet i en sumpstation? Utrustningen som vanligen används för detektering av vattennivån är beroende av att vara antingen under eller i linje med vattennivån. Detta utsätter utrustningen för stora påfrestningar på grund av miljön inuti i en pumpstation. Xylem är ett av de globalt ledande företagen inom pumpar, följaktligen är avloppspumpar en av deras huvudsakliga produkter. Den huvudsakliga utrustningen som används i detta projekt är en kamera kopplad till en dator som monteras på den inre och översta delen av en sump i en pumpstation. Programvaran som utvecklats inkluderar ett enkelt grafiskt interface. Detta interface implementerades i C# och är designat för att kontinuerligt samla in data från en kamera för efterföljande analys. Vår algoritm använder sig utav anti-korrelationen mellan många bilder tagna under ett kort intervall för att bestämma det verkliga vattendjupet. De kända dimensionerna av pumpstationen används sedan för att beräkna volymen av vattnet. De flesta djupmätningar genererade av vårt program var korrekta och vi har lyckats korrekt uppskatta vattennivån med ett fel på mindre än 4 cm. Detta motsvarar ett volymfel på 62 liter för en sump med en diameter på 140 cm. Vår algoritm har lyckats övervaka hur djupet ändras med tiden i en live-simulerad miljö. Denna noggrannhet erhålles med ett tidsfönster på 1 sekund. Resultatet av detta system är viktigt eftersom det visar att det är möjligt att använda en kamera för att mäta vattendjup. Detta ger pumpägare och operatörer värdefull information om befintligt skick av en pumpsump, både i form av aktuellt vattendjup samt en bild av möjliga avvikelser såsom förekomsten av främmande objekt inuti sumpen.
Farkhondeh, Ehsan. "Design of a dry sump lubrication system for a Honda® CBR 600 F4i engine for Formula SAE applications". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36310.
Texto completoIncludes bibliographical references (leaf 34).
A dry sump lubrication system for a Formula SAE race car was designed and manufactured in order to gain the various advantages this type of system affords. A dry sump system stores oil in an external tank and pumps it between the engine and tank as needed. This allows for a shallower oil pan, which permits lower engine placement. This lower placement improves handling through a lower center of gravity. Additionally, the highly stressed racing engine, a Honda CBR 600 F4i, receives more constant lubrication than a conventional wet sump system. The system included design of a new pan, tank and the associated bracketry and hoses that are needed to make the system functional. The design of the system stressed reliability while keeping an eye on weight to minimize it whenever possible. Detailed analysis and the methodology driving the design choices are presented here along with simple dry sump theory. This document serves as the roadmap through the design of the first dry sump system on an MIT FSAE car. It should prove beneficial to the team when the official design report is created for the competition. Lastly, it will help assist future members who certainly aim to refine the package in subsequent years to make it smaller, cheaper, lighter, more reliable and simply better performing overall.
by Ehsan Farkhondeh.
S.B.
Lahti, Erik Anders. "An Experimental Approach to Assessing Material Corrosion Rates in a Reactor Containment Sump Following a Loss of Coolant Accident". The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1373990419.
Texto completoSchuch, André Passaglia. "Avaliação da ação genotóxica induzida pela radiação ultravioleta solar na molécula de DNA". Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-30042010-094124/.
Texto completoTo better understand the impact of solar UV radiation upon DNA molecule, we developed a biological system based on the exposure of plasmid DNA to artificial and natural UV sources. The quantification of DNA lesions was performed through the use of specific DNA repair enzymes and antibodies. The biological effects of sunlight, as well as artificial UV-radiation, were evaluated through the determination of the DNA inactivation rate and mutagenesis frequency. Through the application of this technology, we could detect the induction of CPDs and 6-4PPs after exposures to UVB and UVA lamps. Interestingly, the induction of oxidative damages was significantly higher after UVA than UVB radiation. Surprisingly, the profiles of induction of DNA damages observed after sunlight exposures have presented variations especially according to the latitude. In addition, our data clearly indicate that the induction of these biological effects is directly related to the presence of photoproducts in UV-exposed DNA samples, and suggest that oxidative damages are not related to these biological processes. Therefore, a very suitable system was developed capable of providing a wide comprehension of the biological effects of solar-UV radiation upon the DNA molecule.
Ortiz-Soto, Elliott (Elliott A. ). "Design of oil consumption measuring system to determine the effects of evolving oil sump composition over time on diesel engine performance and emissions". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36719.
Texto completoIncludes bibliographical references (leaf 51).
The automotive industry is currently struggling because of the increasingly stricter emissions standards that will take effect in the near future. Diesel engine emissions are of particular interest because they are still less understood than gasoline powered internal combustion engines. On the solid side of the exhaust emissions picture, particulates, or Soot and Ash, play the most important part. It has been found that ash is mostly a product of the fuel and oil composition. An oil consumption measuring system is then necessary if the relationship between oil consumption and ash increase in the sump oil and exhaust system is to be properly determined. This Thesis project consisted of experimentally measuring the variation of oil sump composition of a single-cylinder diesel generator set during a continuous running, steady state test. This was measured using ICP-AES (ICP-OES) elemental analysis technique, and the Total Base Number for the oil was also determined. An effective and reduced cost oil consumption and replenishing system was developed with this purpose.
(cont.) The oil composition analysis demonstrated that the concentration of inorganic/metallic compounds (Ca, P, Zn, Mg) that contribute to ash increased throughout the test, jointly with oil consumption. The oil consumption measuring system developed was also found to be fairly accurate; with an approximate 2.2% error, probably due to oil hold-up. These results were then used to determine the possible effects of oil composition and oil consumption on Ash emissions and exhaust aftertreatment technologies.
by Elliott Ortiz-Soto.
S.B.
Studený, Martin. "Vyhodnocení provozu tlakové stokové sítě obcí Heroltice - Vohančice - Březina". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409708.
Texto completoČervenková, Martina. "Studie odkanalizování a likvidace odpadních vod obce Větřní". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240218.
Texto completoSouza, Patrícia Caldeira de. "Codisposição de lodo de fossa séptica em aterro sanitário do tipo trincheira". Universidade Federal de Goiás, 2015. http://repositorio.bc.ufg.br/tede/handle/tede/5470.
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Given the problematic situation of basic sanitation in Brazil, where many regions are not served by sewage systems, one of the alternatives of the municipalities is to use Individual and Household Sewage Disposal (SITDE), attached as an option for the disposal of domestic sewage. The Residue of Fossa and Septic Tank (RFTS), generated in SITDE is intended, for the most part Sewage Treatment Station (ETE). However, not all municipalities have ETE and due to high load of pollutants and pathogenic organisms in RFTS, there must be an alternative to its proper destination in order to ensure the quality of the environment and preserve public health. Therefore, this study aimed to evaluation of codisposição of RFTS impacts with Urban Solid Waste (RSU) in landfills trench type. For this, four experimental cells were built in the open in the area of the landfill in the city of Goiânia, to receive the following sludge percentage: 0%, 2%, 5% and 9%. Based on the individual volume of the trenches (5 m3), set up an array of 40 kg/day of RSU in each trench, three times a week for five months, from April to August 2013. After the release of RSU in the trenches, they were compressed manually, RFTS codisposto on waste and later it was used to cover the ground. The RFTS used in the study was characterized according to the parameters pH, Biochemical Oxygen Demand (DBO), Chemical Oxygen Demand (DQO), total solids, fixed total solids, total volatile solids, total suspended solids, fixed suspended solids, volatile suspended solids, sedimented solids, turbidity, ammonia nitrogen and total phosphorus. The results showed that the moisture content of RSU grounded to a depth meter increased with the incubation time, and the volatile solids remained constant. In quantitative terms, the sludge codisposition in different percentages did not affect the volume of leachate generated. As to the quality of the leachate, there was an increase in total solids concentrations for the parameters, COD, BOD and ammonia nitrogen in the trenches receiving cavity residues and septic tank, in particular at concentrations of 5 and 9%. The presence of total coliforms and Escherichia coli was stabilized in very close values with the passage of time in all trenches do not indicate a long-term impact. For pH, who always remained in the alkaline range, the addition of the sludge did not result in changes considered significant. It is recommended to carry out further studies adopting other levels of pit residue concentrations and septic tank trench in landfills.
Perante a situação problemática do saneamento básico no Brasil, em que diversas regiões não são atendidas por redes coletoras de esgoto, uma das alternativas dos municípios é a utilização de Sistemas Individuais de Tratamento e Disposição de Esgoto Doméstico (SITDE), que figura como uma opção para a disposição do esgoto doméstico. O Resíduo de Fossa e Tanque Séptico (RFTS) gerado nos SITDE é destinado, na maioria das vezes, para Estações de Tratamento de Esgoto (ETE). Entretanto, nem todos os municípios brasileiros possuem ETE e, devido à elevada carga de poluentes e organismos patogênicos presentes nos RFTS, é preciso que haja uma alternativa para sua destinação adequada com o intuito de garantir a qualidade do meio ambiente e preservar a sáude pública. Diante disso, neste trabalho objetivou-se a avaliação dos impactos da codisposição dos RFTS com os Resíduos Sólidos Urbanos (RSU) em aterros sanitários tipo trincheira. Para tanto, foram construídas quatro células experimentais a céu aberto ná área do aterro sanitário do município de Goiânia, para receberem, os seguintes percentuais de lodo: 0%, 2%, 5% e 9%. Com base no volume individual das trincheiras (5 m3), definiu-se uma disposição de 40 kg/dia de RSU em cada trincheira, três vezes por semana, durante cinco meses, de abril a agosto de 2013. Após os lançamentos dos RSU nas trincheiras, os mesmos eram compactados manualmente, o RFTS codisposto sobre os resíduos e, posteriormente, utilizava-se o solo para cobertura. O RFTS utilizado no estudo foi caracterizado segundo os parâmetros pH, Demanda Bioquímica de Oxigênio (DBO), Demanda Química de Oxigênio (DQO), sólidos totais, sólidos totais fixos, sólidos totais voláteis, sólidos suspensos total, sólidos suspensos fixos, sólidos suspensos voláteis, sólidos sedimentáveis, turbidez, nitrogênio amoniacal e fósforo total. Os resultados obtidos demostraram que o teor de umidade dos RSU aterrados a um metro de profundidade aumentou com o tempo de incubação, e que os sólidos voláteis permaneceram constantes. Em termos quantitativos, a codisposição do lodo em diferentes percentuais não interferiu no volume do lixiviado gerado. Quanto à qualidade do lixiviado, observou-se aumento das concentrações para os parâmetros sólidos totais, DQO, DBO e nitrogênio amoniacal nas trincheiras que receberam os resíduos de fossa e tanque séptico, em especial nas concentrações de 5 e 9%. A presença de coliformes totais e Escherichia coli foi estabilizada em valores bastante próximos com o decorrer do tempo, em todas as trincheiras, não indicando um impacto em longo prazo. Para o pH, que permaneceu sempre na faixa alcalina, a adição do lodo não implicou em alterações consideradas significativas. Recomenda-se a realização de outros estudos adotando outros níveis de concentrações de resíduo de fossa e tanque séptico para trincheiras em aterros sanitários.
Ondruch, Marek. "Trubkový držák lyžiny rally vozu Škoda Fabia Super 2000". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230923.
Texto completoWeiß, Frank-Peter. "Aktuelle Themen der Reaktorsicherheitsforschung in Deutschland". Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-28406.
Texto completoWeiß, Frank-Peter. "Aktuelle Themen der Reaktorsicherheitsforschung in Deutschland". Forschungszentrum Rossendorf, 2006. https://hzdr.qucosa.de/id/qucosa%3A21667.
Texto completoAndersson, Patrik y Morgan Wallin. "Low Loss Articulated Hauler Axle : A Conceptual Study". Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63842.
Texto completoZeileis, Achim. "A unified approach to structural change tests based on F statistics, OLS residuals, and ML scores". Institut für Statistik und Mathematik, WU Vienna University of Economics and Business, 2005. http://epub.wu.ac.at/714/1/document.pdf.
Texto completoSeries: Research Report Series / Department of Statistics and Mathematics
Chicuta, Andrea Maiumi. "Estudo experimental sobre recuperação de oleo pesado atraves da combustão in-situ". [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265527.
Texto completoDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica e Instituto de Geociencias
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Resumo: Este trabalho foca a recuperação melhorada de petróleo através da técnica conhecida como combustão in-situ. Ensaios experimentais foram realizados com óleo pesado de 12,8ºAPI procedente de um campo onshore no Brasil a fim de avaliar a influência da argila no meio poroso com saturações iniciais de óleo variando de 25 a 50%. O aparato experimental utilizado consiste em: sistema de injeção de fluido, tubo de combustão, sistema de produção de fluidos, sistema de análise gasosa e gasômetro, e sistema de aquisição e análise de dados. Os resultados experimentais obtidos mostram que o fenômeno da combustão é possível para o óleo e a rocha testados. Além disto, estes testes fornecem parâmetros importantes que indicam a ocorrência de reações de oxidação. A argila tem um papel fundamental na deposição de combustível e conseqüentemente na propagação da frente de combustão. Na ausência de argila no meio poroso a frente não foi sustentada, enquanto que na sua presença foi obtido um comportamento da frente de combustão estável. Já o aumento da saturação de óleo ocasionou um maior depósito de combustível. Temperaturas entre 457 à 501ºC foram obtidas na frente de combustão e fator de recuperação de óleo acima de 84%. Verificou-se que as velocidades da frente de combustão variaram entre 14,1 a 18,3 cm/h. Além disto, uma melhora na qualidade do óleo entre 3,2º a 8,4ºAPI foi observada no óleo produzido. Os parâmetros básicos da combustão - consumo de combustível, ar requerido, razão ar/combustível, razão atômica de H/C, utilização de O2 - obtidos durante os experimentos são favoráveis à implantação do método de combustão in-situ e devem servir de guia para o projeto piloto de campo.
Abstract: The present work refers to an experimental study on oil recovery by in-situ combustion. Experimental tests were performed with a heavy oil of 12.8ºAPI from a Brazilian onshore field with the main purpose to survey the influence of clay content in the reservoir rock with initial oil saturations ranging from 25 to 50%. A specific apparatus used can be described in: gas injection system, combustion tube, fluid production system, gas analysis system and control and data recording system. The results indicate that the in-situ combustion method is technically applicable to the rock-fluid system tested. Moreover, the tests were useful in providing the proper range of parameters for the oxidation reactions to occur. Clay has proved to play a key role on fuel deposition and, consequently, on propagation of the combustion front. In a clean sand rock medium, the combustion front was not self-sustained, while with its presence sustainable combustion reactions were achieved. And the increase in oil saturation resulted in a greater fuel deposition. Front peak temperatures were recorded in the range of 457 - 501 ºC for oil recovery factors greater than 84%. Results show combustion front velocities to span between 14.1 to 18.3 cm/h. Worth mentioning, upgradings of 3.2º to 8.4º API were observed in the produced oil. The basic combustion parameters - fuel consumption, air requirement, air-fuel ratio, atomic H/C ratio, oxygen utilization - obtained during the experiments are favorable to the implementation of insitu combustion and shall be used as a guide to the pilot project planned for the field.
Mestrado
Reservatórios e Gestão
Mestre em Ciências e Engenharia de Petróleo
Vrána, Radek. "Variantní řešení odkanalizování obce Dětkovice". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265256.
Texto completoGaluška, Jiří. "Modelování vtokových vírů". Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318713.
Texto completoKouřilová, Vendula. "Novostavba vinařského domu". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227610.
Texto completoSumpf, Joachim [Verfasser]. "Simulationsgestützte Methoden zur Ermittlung der Wirkung partizipativer Maßnahmen auf den lokalen Verkehr / von Joachim Sumpf". 2008. http://d-nb.info/989006131/34.
Texto completoChao, Wei-yuan y 趙偉淵. "Study on Pumping Sump Flow". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/18546937406349591171.
Texto completo逢甲大學
水利工程與資源保育研究所
100
There are engineering and non-engineering measures for protecting the low-lying areas from flooding, and installing pumping stations is one commonly adopted engineering measure. Undoubtedly the efficiency of pumping is directly affected by the dimensions of the well, or the boundary conditions of the pump station. However, the published optimal sizing criteria for wells can lead to lower cost-benefit ratios due to the degrees of land alteration and volume of excavation occurring on-site. Therefore, understanding the mechanism about how the scales of the well on pumped flow field can help to achieve higher efficiency in pumping operations. The primary factors in well sizing include: the width of the well (B), suspension height (C), immersion depth (hs), and distance to the back wall (T). In this study, the CFD software package ANSYS CFX 13.0 program was applied to construct the pumping-well models, and the computation in pumped flows assumed that the flow field remains in steady-state and the fluid was incompressible. Two physically based indexes, the uniformity in the distribution of flow velocity and root-mean-square of weighted velocity, were used to assess the state of velocity steadiness and efficiency of the pumping station. By using the experiments and results given by Lin (2004), and the indexes of uniformity and weighted velocity, this study concluded that Vu=100% and θ= 90o to be ideal values. On the basis of simulations we also determined the relation between efficiency of pumping and forms of the back wall as well as different sizing specifications. The results indicated that the optimal sizing dimensions for a rectangular back wall are B = 2.5D, C = 0.9D, hs = 2.5D and T = 0.75D. And the optimal sizing dimensions for a semi-circular back wall are T = 0.75D, B≧ 2.8D, and 0.9D ≦C ≦ 1.3 D, D is the diameter of the bell The optimum setup conditions will facilitate the installations of pumping facilities in the future.
Wei-LiangChuang y 莊偉良. "Numerical Study on Pump Sump Flows". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/30574031870699034004.
Texto completo國立成功大學
水利及海洋工程學系碩博士班
98
Large-scale hydraulic pump sumps are widely used in cooling system of power-generation plants, flooding control station, and sewage-disposal plants. It is crucial to evaluate the uniformity and stability of the pump-sump flow which has significant influence on the pump performance. For this problem, experimental approach is mainly applied in assessing such problem for many years. However, with the rapid development of the computer capability, three-dimensional numerical modeling becomes an alternative to simulate the pump-sump flows and understand the mechanism of the vortex formation. In contrast to the limitation caused by the measuring method, numerical modeling can perform the flow field anywhere in the intake model. Moreover, if several sets of modified setups are concerned, numerical modeling can reduce a great number of costs in construction and operation for experiment. In this study, three-dimensional incompressible Navier-Stokes equation is solved, and the turbulent fluctuation is filtered and modeled by Large Eddy Simulation model. The momentum equation is discretized by Finite Volume Method in hybrid structured and unstructured grids. The solid wall is treated as no-slip condition. The uniform flow condition is employed at inflow and outflow surfaces. In this thesis, the validation on numerical model will be performed in two distinct intake models. Two experiments are cited: Lin (2004) and Ansar et al. (2001). For the comparisons in the approaching flow, including velocity profiles and flow patterns, the simulation results well agree with both experiments. Meanwhile, the simulation consisting of a complicated suction bell is made in contrast to consider it as simple circular cylinder in previous study. Furthermore, instead of replacing the main channel with known velocity profile done by Ansar et al. (2002) who solved the inviscid solution, present study considering the main channel can capture further subtle phenomena. In case study, the flows in the intake pipe are numerically investigated for various flowrates and modified setups. As for vertical velocity distribution, reverse flow occurs in the region above the throat, but no negative vertical velocity appears in the suction bell. The vorticity distribution indicates that a pair of strong, nearly symmetric swirl exists around the pipe center. Since swirl angle is widely used to evaluate the pump performance in experiment, the approach with numerical results is performed and discuss in this thesis.
Chih-YaoYang y 楊智堯. "Effects of hydraulic structures on pumping sump flows". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/02822892667895689261.
Texto completo國立成功大學
水利及海洋工程學系碩博士班
98
Large-scale pumps have been extensively used in sewage treatment plants, flood control pumping stations, and circulating cooling water system of electric power plants. The whole system contains lots of complicated hydraulic structures. While designing the sump, the project technical specification such as Unite States Standard (HI) and Britain’s standard (BHRA), etc. are widely consulted at present. However, those project technical specifications are established in ideal simple conditions, while the extra structures increasing, it still has to do the physical modeling test to ensure the security and understand the variation in flow fields. The experimental model of present paper is designed according to the second nuclear power plant of Taiwan. Detailed three-dimensional measurements of the approach flow in the pump sump were obtained by using an Acoustic Doppler Velocimeter(ADV), discussion on uniform and non-uniform flow in front of the suction pipe. The swirl angles at the throat of the suction pipe were also measured by swirl meter to investigate effects of different suction structures and observed the frequency of free surface vortices appearance. Besides, also discussed the relationship between the effects upon baffle wall and it’s place. The experimental results show that the pump-approach flow distributions are stable with uniform flow. The average turbulent intensity with non-uniform flow increased 1.5 to 2 times compared to uniform flow. Generally speaking, turbulent intensity is directly proportional to the distance of suction pipe. The baffle wall performed very well in terms of mitigating the intensity and appearing frequency of free surface, and the best installation place is in the middle of free surface. The suction structure is able to improve the flow condition. The test result is almost no difference to diverse suction structure angles. The about mentioned results would be referred to the important of intake structure in the future.
Tasi, Wei-chang y 蔡維倡. "Applying CFX to Simulate the Flow Uniformity of the Pipe Opening in a Rectangle Pumping Sump". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/67801599336845075966.
Texto completo逢甲大學
航太與系統工程所
99
The first step of this thesis is to verify CFX’s two-phase flow capability by comparing the experimential and numerical solutions from Okamura et al.【1】and莊【2】. Then, we start to simulate a pumping sump having a vertical intake pipe with a flow rate of 3 cms. The optimal target functions of the pumping sump are the velocity uniformity and the weighted average velocity of intake pipe proposed by 陸【3】, and the testing variables are the sump width B, the distance from water level to intake opening hs, and the distance from sump bed to intake opening C. The initial geometry data of the pumping sump, that is referred from the sump in Central Taiwan Science Park, are B=2.8D, C=0.9D, and hs=2.2D, where D is the intake diameter. To sum up, B is the most important factor to affect the flow field of the pumping sump. Next, C is the key factor to affect the pump efficiency. The least influential factor is hs. Although the resulting vortices on the surface of water are clear in the simulations, the phenomena of whirlpool don’t appear accurately. Therefore, it is not easy to identify the effect of hs. The optimized range is 2.8D≦ B、0.7D≦C≦1D、2D ≦hs, that could be obtained from comparing between the target function to the circumstance of flow field.
Lin, Chun-Po y 林仲柏. "On the influence of an upstream sluice gate to pump sump flows in Shen-Ho Power Plant". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/5wczep.
Texto completo國立成功大學
水利及海洋工程學系碩博士班
92
Large-scale pumps have been extensively used in sewage treatment plants, flood control pumping stations, and circulating cooling water system of electric power plants. To keep these pumps work efficiently, the flow field in front of the suction pipe must keep uniform and stable. So the design of a sump that is normally defined to be between a forbay and a suction pipe has been a very important issue. Although the geometric design of sump can refer to guidelines which were widely used, ex., the HI Standards and BHRA guidelines, these guidelines are only valid for a simple geometry. In case for complex situations, an evaluation of the preliminary design is still needed through physical modeling tests. The objectives of present paper are to investigate the pump sump flow fields under different sluice gate submergences and Froude Numbers through physical modeling tests. A 1:10 scale intake model, similar to the circulating water pump in the Shen-Ho Power Plant, was used. Detailed three-dimensional measurements of the approach flow in the pump sump were obtained by using an Acoustic Doppler Velocimeter(ADV). The distributions of mean velocity, velocity standard deviation, and vorticity in the pump sump under difference experimental conditions were discussed. The swirl angles at the throat of the suction pipe were also measured by swirl meter to investigate the influence of different sluice gate submergences and Froude Numbers. The experimental results show that without sluice gate, the pump-approach flow distributions are uniform. With sluice gate, flow separation occurred behind the sluice gate and transverse vortices formed. The velocity standard deviation and vorticity increase at higher depths. The flow at higher positions becomes the main source of disturbance. As the sluice gate submergence increases, the influenced range of flow enlarged. And vorticity, velocity standard deviation, and swirl angle also increase. As the Froude Number increases, vorticity, velocity standard deviation, and swirl angle also increase. This trend is the same as references mentioned.