Relevant bibliographies by topics / Coke – Testing

Academic literature on the topic 'Coke – Testing'

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Published: 4 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Coke – Testing"

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Anthony, E. J., K. Anderson, R. Carson, and I. T. Lau. "Petroleum Coke and Coal Start-Up Testing in Bubbling Fluidized Bed Combustors." Journal of Energy Resources Technology 119, no. 2 (June 1, 1997): 96–102. http://dx.doi.org/10.1115/1.2794982.

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Bench-scale and 160 MWe demonstration tests were conducted for petroleum coke and high volatile bituminous coal blends. The bench-scale apparatus was a 100-mm-dia reactor located at the Canada Centre for Mineral and Energy Technology (CANMET), Energy Research Laboratories. The demonstration tests were conducted on the Tennessee Valley Authority’s (TVA) 160 MWe Shawnee Atmospheric Fluidized Bed Combustion (AFBC) Unit located at Paducah, Kentucky. Five and ten percent nominal volatile petroleum cokes were tested in the bench-scale unit. In addition, for the five-percent petroleum coke blends of 25, 50, and 75-percent petroleum coke, with the balance coal, were also examined at the bench scale. Eight start-up tests have been conducted with 50 percent blend of green delayed petroleum coke at the Shawnee AFBC unit. The bench-scale tests revealed that the volatile content in the petroleum coke was the primary factor affecting start-up. The tests showed that the volatile content from the coke and coal ignited at similar times; the char required longer to ignite. Bench-scale tests showed adequate start-up performance with blends up to 75 percent petroleum coke. Cold start-ups were conducted at the Shawnee AFBC Unit with 7 to 10 percent volatile green delayed petroleum coke. In all the start-ups, the operating temperature of 816°C was reached within 15 min of introducing the petroleum coke blend; this is similar to when high volatile bituminous coal was used. One start-up required a longer time because limestone had to be used to generate the bed. Local hot spots (982°C) were noticed in several start-ups for short periods, but subsided when additional air was supplied. Although more difficult to control, TVA routinely starts the Shawnee AFBC Unit with 50 percent shot petroleum coke and 50 percent high volatile bituminous coal.
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Konstanciak, Anna. "High-Temperature Testing of the Properties of Blast Furnace Coke." Materials Science Forum 638-642 (January 2010): 2616–21. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.2616.

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The article describes the behaviour of coke in the blast furnace. Factors, which cause weakening and degradation of coke lumps at temperatures above 1300°C have been analyzed. On the basis of preliminary testing of samples taken from a blast furnace at different distances from the tuyère outlet and tests for thermo-abrasion ξ, the advisability of using the pre-tuyère chamber for the assessment of coke quality at high temperatures has been indicated. Thermodynamic calculations for the determination of the chemical composition of the products of reaction of coke ash mineral substances with elementary carbon and air, as well as the behaviour of coke at high temperatures under inert gas conditions are presented. The number of compounds forming from coke ash components during heating in a stream of gases of highly differential reductiveness reflects the complexity of the physicochemical phenomena.
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Kostromin, R. N., P. K. U. Torrehon, and R. R. Fazulzyanov. "TESTING REAGENTS DECREASING COKE EFFECTS IN VISBREKING PROCESSES." Scientific and Technical Volga region Bulletin 8, no. 6 (June 2018): 14–20. http://dx.doi.org/10.24153/2079-5920-2018-8-6-14-20.

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Shiau, J.-S., Y.-C. Ko, C.-K. Ho, and M.-T. Hung. "Results of tuyere coke sampling with regard to application of appropriate coke strength after reaction (CSR) for a blast furnace." Journal of Mining and Metallurgy, Section B: Metallurgy 53, no. 2 (2017): 131–38. http://dx.doi.org/10.2298/jmmb160316003s.

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Raising pulverized coal injection (PCI) will decrease coke rate, but increase the residence time of coke and abrasion in the blast furnace (BF). Thus, insufficient coke strength will generate more coke fines in the lower BF and result in lower permeability and production of hot metal (HM). For understanding the behavior of coke at various HM productivities, a tuyere coke sampler was used to collect the coke samples for measuring the coke strength. Firstly, the difference of sampled coke under the conditions of various HM productivities was explored. Secondly, the BF operating conditions and causes of generating more coke fines was correlated by testing the coke reaction rate after reaction. Finally, according to the above analysis results, the relative regression equations had been obtained for sampling coke properties, BF operation conditions and BF permeability. Furthermore, the coke strength after reaction (CSR) quantitative target and its online system at various blast conditions were set to provide some reference for coke and HM production.
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Wang, Xing Juan, Ran Liu, Hong Li, Li Guang Zhu, and Jue Fang. "Influce Mechanism on Compressive Strength of Coke in Blast Furnace." Advanced Materials Research 402 (November 2011): 191–95. http://dx.doi.org/10.4028/www.scientific.net/amr.402.191.

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Coke is the unique role of supporting material column in blast furnace high temperature region. Therefore the most important property is the high temperature compressive strength after reaction. This paper used decarburization electric furnace, electric mirrors, adjustable atmosphere high temperature compression testing machine and other equipments, study on the relationships between coke carbon loss rate and reactivity and size, the distribution rule between high temperature compressive strength and coke carbon loss rate. The study found that the carbon loss rate was affected by reactivity and size, in the same piece of coke, external rate of carbon loss higher than the internal loss, the surface carbon losses affect on coke strength is less, it make coke size decrease; carbon losses occur inside will not affect the size of coke, but it may affect the coke compressive strength seriously. The compressive strength can be divided into two parts: a constant and an amount proportional to carbon loss rate.
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Wang, Xing Juan, Ran Liu, Shuang Ying Wang, Li Guang Zhu, and Jue Fang. "Study on the Index of Metallurgical Coke Strength after Reaction." Advanced Materials Research 487 (March 2012): 20–23. http://dx.doi.org/10.4028/www.scientific.net/amr.487.20.

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The blast furnace coke plays four roles as exothermic agent, reducer, carburizer and framework. The former three roles can be played by other fuels, but the role as framework still can’t be played by other fuels by now. In order to ensure its skeleton role, it must be sure that the coke has enough high-temperature strength. This research uses KSJ decarbonizing electric furnace, drum-I and high temperature compressive testing machine to furthest simulate the coke’s actual actions in the blast furnace. The research indicates that comparing with the reactivity and strength index after reaction of coke GB4000-1996, the blast furnace coke’s high temperature compressive strength under a certain temperature and a certain carbon loss rate can give a more comprehensive evaluation of the quality of coke.
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Lomas, Hannah, Richard Roest, Tizshauna Thorley, Adam Wells, Hui Wu, Zhengyi Jiang, Richard Sakurovs, Sharna Wotherspoon, Richard A. Pearson, and Merrick R. Mahoney. "Tribological Testing of Metallurgical Coke: Coefficient of Friction and Relation to Coal Properties." Energy & Fuels 32, no. 12 (October 30, 2018): 12021–29. http://dx.doi.org/10.1021/acs.energyfuels.8b01339.

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Yeh, Hsuan-Hsien, and Hsien-Cheng Kao. "Testing a Coke Biofilter for the Pretreatment of Polluted Surface Water in Taiwan." Journal - American Water Works Association 85, no. 5 (May 1993): 96–102. http://dx.doi.org/10.1002/j.1551-8833.1993.tb05991.x.

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Pomelov, Vladislav, Olga Poddaeva, and Pavel Churin. "Experimental studies of wind impact on coke chambers." MATEC Web of Conferences 251 (2018): 02034. http://dx.doi.org/10.1051/matecconf/201825102034.

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The article deals with the experimental investigation of the wind effect on coke chambers, which are part of delayed coking units. These structures are one of the most susceptible structures of an increased level of responsibility in the structure of industrial enterprises, which is primarily due to their height (height exceeds 100 meters). Experimental researches were carried out on the basis of the Educational Scientific and Production Laboratory for Aerodynamic Tests of Building Structures of NIU MGSU, using the Unique Scientific Installation of the Large Gradient Wind Tunnel. The text of the article shows the main features of the models made for carrying out experimental studies, briefly describes the process of testing and their results.
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Jin, Jin, Qi Wang, and Song Zhang. "Kinetics and mechanisms of coke and sinter on the coupling reaction to evaluate the integrated effects of coke solution loss reaction on blast furnace processes." Metallurgical Research & Technology 118, no. 5 (2021): 506. http://dx.doi.org/10.1051/metal/2021065.

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The gas–solid coupling reaction kinetics at a constant temperature at each temperature point in the high-temperature cohesive zone in a blast furnace environment were simulated using industrial blast furnace raw material sinter, the low-reactivity conventional coke, and the high-reactivity unconventional coke. In this method, the coupling test of the sinter and coke at constant temperature was performed after a supporting thermogravimetric device was used to carry out pre-reduction, and the coupling reaction of industrial-grade sinter and coke were used to obtain the kinetic data and a mathematical description of the reaction mechanism. The results showed that in the high-temperature cohesive zone, the gasification reaction rate of the low-reactivity coke is the rate-controlling step of the gas–solid coupling reaction rate between the sinter and the conventional low-reactivity coke. By contrast, the rate-controlling step of the gas–solid coupling reaction rate between the sinter and highly-reactive coke is the reduction of sinter. The maximum difference between the initial reaction temperatures of the two kinds of coke samples is 30 °C. Using the same testing standard as coke strength after the reaction (CSR) to test the thermal strength of coke after the coupling reaction, it was found that there is little difference between the thermal strengths (CSRp) of the two kinds of coke after the reaction. The thermal strength of the high-reactivity coke is the worst at 1100 °C, and that of coke with low reactivity is the worst at 1200 °C. The highly reactive coke can operate smoothly in the blast furnace of the cohesive zone and this is explained from the perspective of kinetics. This knowledge provides guidance for the evaluation of the capability of coke to resist solution loss.
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Dissertations / Theses on the topic "Coke – Testing"

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Liu, Chang Materials Science &amp Engineering Faculty of Science UNSW. "Bulk density and angle of repose of coal." Awarded by:University of New South Wales. Materials Science & Engineering, 2007. http://handle.unsw.edu.au/1959.4/40495.

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This thesis reports a study on the effects of size distribution, moisture content and oil addition on bulk density and angle of repose of coal. The experimental work includes four stages. The first stage is to develop reliable experimental techniques. The results confirm that ASTM cubic foot test is reliable for measurement of bulk density and angle of repose if properly operated, although the latter is better measured in a piling process. Stages 2 and 3 are to investigate the effects of size distribution by using -3.55mm% for stage 2 and mean size do.s for stage 3, water content and oil addition on bulk density and angle of repose of coal. For each of them, empirical equations are formulated to predict bulk density and angle of repose. The results indicate that the fraction -3.55mm cutting size in stage 2 does not affect bulk density significantly, while the increase of do.s decreases bulk density to a minimum and then increases. Particle size distribution does not affect angle of repose much. The increase of moisture content decreases bulk density and increases angle of repose significantly. The increase of oil addition increases bulk density while decreases angle of repose significantly. The correlation between bulk density and angle of repose can also be observed: the higher bulk density, the lower angle of repose. There are other variables affecting bulk density and angle of repose. They include oil type, absorption time discharging height and external loading. Their effects on bulk density and angle of repose are quantified in stage 4. The results suggest that, a higher discharging position or larger external loading increase bulk density significantly. Angle of repose decreases when increase the height of discharging position. Diesel oil performed better than waste oil addition in terms of bulk density enhancement. For most of the cases examined, bulk density and angle of repose become stable after ~24 hours oil absorption time.
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McCallum, Adrian Bruce. "Cone penetration testing in polar snow." Thesis, University of Cambridge, 2012. https://www.repository.cam.ac.uk/handle/1810/244073.

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Innovative Cone Penetration Testing (CPT) using adapted commercial CPT equipment was conducted in Antarctica in early 2010 in an attempt to assess the strength of polar snow; additionally, application of CPT data was considered, particularly in estimating surface bearing capacity. Almost 100 CPT tests were carried out and both qualitative and quantitative analysis of data was undertaken. Additional supporting testing in- cluded snow density assessment, snow strength assessment, extrapolation of CPT data via Ground Penetrating Radar (GPR) and preliminary mini-cone penetrometer testing in Greenland. Analysis of results revealed that assessing the strength of polar snow via CPT is affected by numerous factors including penetration rate, cone size/shape and snow material properties, particularly compaction of the snow undergoing penetration. A density-dependant relationship between CPT resistance and snow shear strength was established, and methods for estimating surface bearing capacity directly from CPT in homogeneous and layered polar snow were proposed. This work applied existing technology in a new material and shows that CPT can be used efficiently in polar environs to provide estimates of snow shear strength and surface bearing capacity, to depths of 10 m or more.
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Stratis, Athanasios. "Model-based Testing on Generated C Code." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-28381.

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In this master thesis we investigated whether it is possible to use automatically generated C code from Function Block Diagram models as an input to the CPAchecker model checker in order to generate automated test cases. Function Block Diagram is a non-executable programming and modeling language. Consequently, we need to transform this language to an executable language that can be model checked. A tool that achieves this is the MITRAC tool, a proprietary development tool used in the embedded system domain, for engineering programmable logic controllers. The purpose of this research was to investigate to what extent the generated C code using MITRAC can be reused as an input to the CPAchecker tool for automated test case generation. In order to achieve this we needed to perform certain transformations steps on the existing code. In addition, necessary instrumentations were needed in order to trigger CPAtiger, an extension of CPAchecker which generates test cases, to achieve maximum condition coverage. We showed that by performing the required modifications it is feasible to reuse the generated C code as an input to CPAchecker tool. We also showed an approach for mapping the generated test cases with the actual Function Block Diagram. We performed mutation analysis in order to evaluate the quality of the generated test cases in terms of the number of injected faults they detect. Test case generation with CPAchecker could be improved in the future in terms of reducing the number of transformations and instrumentations that are currently needed. In order to achieve this we need to add to CPAchecker tool support for structures that are used in C, such as structs. Finally we can extend the type of logic coverage criteria we can use with CPAchecker by adding additional support of FQL language.
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Hansson, Bevin. "Random Testing of Code Generation in Compilers." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175852.

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Compilers are a necessary tool for all software development. As modern compilers are large and complex systems, ensuring that the code they produce is accurate and correct is a vital but arduous task. Correctness of the code generation stage is important. Maintaining full coverage of test cases in a compiler is virtually impossible due to the large input and output domains. We propose that random testing is a highly viable method for testing a compiler. A method is presented to randomly generate a lower level code representation and use it to test the code generation stage of a compiler. This enables targeted testing of some of the most complex components of a modern compiler (register allocation, instruction scheduling) for the first time. The design is implemented in a state-of-the-art optimizing compiler, LLVM, to determine the effectiveness and viability of the method. Three distinct failures are observed during the evaluation phase. We analyze the causes behind these failures and conclude that the methods described in this work have the potential to uncover compiler defects which are not observable with other testing approaches.
Kompilatorer är nödvändiga för all mjukvaruutveckling. Det ärsvårt att säkerställa att koden som produceras är korrekt, eftersomkompilatorer är mycket stora och komplexa system. Kodriktigheteninom kodgenereringsstadiet (registerallokering och instruktionsschemaläggning) är särskilt viktig. Att uppnå full täckningav testfall i en kompilator är praktiskt taget omöjligt på grund avde stora domänerna för in- och utdata.Vi föreslår att slumpmässig testning är en mycket användbarmetod för att testa en kompilator. En metod presenteras för attgenerera slumpmässig kod på en lägre representationsnivå och testakodgenereringsstadiet i en kompilator. Detta möjliggör riktadtestning av några av de mest komplexa delarna i en modern kompilator(registerallokering, instruktionsschemaläggning) för förstagången.Designen implementeras i en toppmodern optimerande kompilator,LLVM, för att avgöra metodens effektivitet. Tre olika misslyckandenobserveras under utvärderingsfasen. Vi analyserar orsakernabakom dessa misslyckanden och drar slutsatsen att demetoder som beskrivs har potential att finna kompilatordefektersom inte kan observeras med andra testmetoder. Kompilatorer är nödvändiga för all mjukvaruutveckling. Det är svårt att säkerställa att koden som produceras är korrekt, eftersom kompilatorer är mycket stora och komplexa system. Kodriktigheten inom kodgenereringsstadiet (registerallokering och instruktionsschemal äggning) är särskilt viktig. Att uppnå full täckning av testfall i en kompilator är praktiskt taget omöjligt på grund av de stora domänerna för in- och utdata. Vi föreslår att slumpmässig testning är en mycket användbar metod för att testa en kompilator. En metod presenteras för att generera slumpmässig kod på en lägre representationsnivå och testa kodgenereringsstadiet i en kompilator. Detta möjliggör riktad testning av några av de mest komplexa delarna i en modern kompilator (registerallokering, instruktionsschemaläggning) för första gången. Designen implementeras i en toppmodern optimerande kompilator, LLVM, för att avgöra metodens effektivitet. Tre olika misslyckanden observeras under utvärderingsfasen. Vi analyserar orsakerna bakom dessa misslyckanden och drar slutsatsen att de metoder som beskrivs har potential att finna kompilatordefekter som inte kan observeras med andra testmetoder.
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Kurita, Hiroyuki 1958. "Interferometric aspheric surface testing using ray tracing code." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276944.

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Phase shifting interferometry is one of the most promising methods for testing aspheres. However, one will encounter the following problems when it is applied to test an asphere: (1) very tight fringes produced by a strong asphere exceed the test system's resolution, (2) a test wavefront suffers from system aberrations of the interferometer that cause measurement errors, and (3) the wavefront immediately after reflection does not necessarily represent the shape of the test asphere. This thesis used a high density array sensor to detect the dense fringes. In order to solve the system aberration and the ray retrace problems, it is necessary to incorporate a ray trace code and phase shifting interferometry. This measurement principle was applied for an aspheric surface whose asphericity was 100 waves. A phase shifting Fizeau interferometer was incorporated with an optical design program. The attained accuracy was approximately one-tenth of a wave.
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Krawitz, Ronald Michael. "Code Clone Discovery Based on Functional Behavior." NSUWorks, 2012. http://nsuworks.nova.edu/gscis_etd/201.

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Code clone Discovery Based on Functional Behavior by Ronald M Krawitz 2012 Legacy programs are used for many years and experience many cycles of use-maintenance-use-maintenance-use-etc. Source code or source code functionality is frequently replicated within these programs when it is written, as well as when it is maintained. Over time many different developers with greater or lesser understanding of the source code maintain the source code. Maintenance developers, when they have limited time or lack understanding of the program, frequently resort to short cuts that include cutting and pasting existing code and re-implementing functionality instead of refactoring. This means a specific functionality is often repeated several times, sometimes using different source code. Blocks of replicated source code or source code functionality are called code clones. Removing code clones improves extensibility, maintainability, and reusability of a program in addition to making the program more easily understood. It is generally accepted that four types of code clones exist. Type-1 and Type-2 code clones are comparatively straightforward to locate and tools exist to locate them. However, Type-3 and Type-4 code clones are very difficult to locate with only a few specialized tools capable of locating them with a lower level of precision. This dissertation presents a new methodology that discovered code clones by studying the functional behavior of blocks of code. Code Clone Discovery based on Functional Behavior (FCD) located code clone by comparing how the blocks of code reacted to various inputs. FCD stimulated the code blocks with the same input patterns and compared the resulting outputs. When a significant portion of the outputs matched, those blocks were declared to be a code clone candidate. Manual analysis confirmed that those blocks of code were code clones. Since FCD discovered code clones based on their black-box behavior, the actual source code syntax was irrelevant and manual inspection further confirmed FCD located code clones that included Type-3 and Type-4 code clones which are frequently excluded from code clone detection tools. FCD recognized the code clones regardless of whether or not they use identical code, similar code, or totally dissimilar code. This new technique allows for an improvement in software quality and has the potential to significantly reduce the cost of software over its lifetime.
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Jääskelä, E. (Esa). "Genetic algorithm in code coverage guided fuzz testing." Master's thesis, University of Oulu, 2016. http://urn.fi/URN:NBN:fi:oulu-201601151058.

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The security of computers is a growing concern when the amount of devices increases. New and more comprehensive testing methods need to be done to avoid damages to the users and their computers. Fuzzing is a testing method that inserts semi-valid input to the tested system and has before been considered as a good method for the security testing. However, it usually either does not get high code coverage or it requires a long set-up process or a source code analysis to achieve better code coverage. This work presents a genetic algorithm that automatically balances the probabilities of multiple mutators in a fuzzing program. This balancing aims to maximize the code coverage fuzz testing. After fuzzing two different open source libraries it was found that the grey-box approach in fuzzing gives better results than pure black-box fuzzing
Tietokoneiden tietoturva on kasvava huolenaihe, kun laitteiden määrä lisääntyy. Uusia ja kattavampia testauksia täytyy suorittaa, jotta voidaan estää käyttäjille ja heidän laitteilleen tapahtuvat vahingot. Fuzzausta on pidetty hyvänä testausmetodina, mutta yleensä se ei saavuta hyvää koodikattavuutta tai vaatii joko monimutkaisen asennuksen tai lähdekoodianalyysin. Tämä työ esittelee geneettisen algoritmin, joka automaattisesti tasapainottaa fuzzerin eri mutaatiofunktioiden todennäköisyydet. Tämä tasapainotus pyrkii maksimoimaan saavutetun koodikattavuuden ja parantamaan fuzzaamisen tehokkuutta. Kahden avoimen lähdekoodin kirjaston testaamisen perusteella mutatorit koodikattavuuden perusteella tasapainottava työkalu pärjäsi paremmin kuin perinteinen, lisätietoa hyödyntämätön black-box fuzzaus
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Eid, Walid Khaled. "Scaling effect in cone penetration testing in sand." Diss., Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/49849.

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The Cone Penetration Test (CPT) was developed originally in Holland in the 1930’s as a device which provides a small scale model of a pile foundation. Early versions were simple cone points for which the only measurement was the thrust required to push the point through the ground. Over the past 20 years, the cone was standardized to a tip area of 10 cm², and an electrical version was produced, which allows for continuous measurement of the cone tip resistance and sleeve friction along with a computer-based data acquisition system. The electrical cone represents a significant step forward for the CPT, since it provides a continuous profile of information that can be used to identify soil type and define important engineering parameters. More recently, the CPT has shown considerable potential for calculation of settlements of footings on sand, determination of pile capacity, assessment of ground pressures, and evaluation of liquefaction potential for cohesionless soils. Along with the widening application of the CPT, new varieties of cone penetrometers have appeared, with different sizes than the standard. Smaller cones are used for instances where relatively small depths of soil need to be penetrated, and larger cones have been developed for penetrating dense and gravelly soils. With the introduction of the new cones, there has been a tendency to assume that the methods for reducing CPT data for the standard sized cone can be extrapolated to the other sizes of cones. That is, it is assumed that there are no scale effects in cones of different sizes. While this may be true, to date, little direct evidence has been produced to support this view, and the issue is an important one from two points of view: 1. The present data analysis technology is based on that primarily from testing with a standard cone. lt is important to know if any changes are needed in this approach, or if the existing methods can be used with confidence for any size cone. 2. If it can be shown that no scale factor exists, then this will allow the use of new, smaller cones in experimentation in modem calibration chambers with the knowledge that the test results are applicable for the cones that a.re more widely used in practice. The smaller cones offer several advantages in this type of work in that they facilitate the research considerably by reducing the effort involved in sample preparation, and they are less likely to produce results influenced by boundary conditions in the chamber. One of the major objectives of this research is to develop an insight into the issue of the scale factor caused by the use of different sizes of cones. This is accomplished through an experimental program conducted in a new large scale calibration chamber recently constructed at Virginia Tech. Many of the latest developments in cone penetration testing have been forthcoming from testing done in calibration chambers where a soil mass can be placed to a controlled density under known stress conditions. To conduct the experimentation of this work, it was necessary to design, fabricate, and bring to an operational stage a calibration chamber. The Virginia Tech chamber is one of the largest in the world. A significant portion of the effort involved in this thesis research was devoted to this task. In particular, attention was devoted to the development of a system for placement of a homogeneous soil mass in the chamber, and the implementation of a microcomputer-based data acquisition unit to record and process the test results. The scale effects investigation was performed using three different sizes of cone penetrometers in a test program conducted in the calibration chamber. Of the three cones, one is smaller than the standard with a tip area of 4.23 cm², one was a standard cone with a tip area of 10 cm², and one was larger than the standard cone with a tip area of 15 cm². A total of 47 tests were carried in the chamber using two different levels of confining stress and two different sand densities. The test results show that while a scale factor might exist, the degree of its influence on interpreted soil parameters for a practical problem does not appear significant.
Ph. D.
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Heikkilä, V. (Ville). "Optimizing continuous integration testing using dynamic source code analysis." Master's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201802131229.

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The amount of different tools and methods available to perform software testing is massive. Exhaustive testing of a project can easily take days, weeks or even months. Therefore, it is generally advisable to prioritize and optimize the performed tests. The optimization method chosen to be studied in this thesis was Dynamic Source Code Analysis (DSCA). In DSCA a piece of target software is monitored during testing to find out what parts of the target code get executed. By finding and storing this information, further code changes can be triggered to execute the stored test cases that caused execution in the modified parts of code. The test setup for this project consisted of three open-source software targets, three fuzz testing test suites, and the DSCA software. Test runs of different lengths were triggered by code changes of varying size. The durations of these test runs and the sizes of the code changes were stored for further analysis. The purpose of this thesis was to create a method for the fuzz testing suite to reliably communicate with the DSCA software. This was done to find out how much time can be saved if CI-testing is optimized by scanning every source code change to obtain a targeted test set as opposed to running a comprehensive set of tests after each change. The data analysis demonstrates with certainty that using DSCA reduces the average run-time of a test by up to 50%
Ohjelmistotestauksessa käytettävien työkalujen ja metodien määrä on massiivinen. Ohjelmistoprojektin läpikotainen testaus saattaa kestää päiviä, viikkoja tai jopa kuukausia. Tämän takia on yleisesti suositeltavaa priorisoida ja optimoida suoritetut testit. Tässä opinnäytetyössä tarkasteltavaksi optimointimetodiksi valittiin dynaaminen lähdekoodianalyysi (DSCA), jossa ohjelmistoa monitoroidaan ajonaikaisesti, jotta saadaan selville mitä osia lähdekoodista mikäkin testi suorittaa. Tämä projekti koostui kolmesta avoimen lähdekoodin ohjelmistoprojektista, kolmesta fuzz-testaustyökalusta sekä DSCA-ohjelmistosta. Erikokoisilla lähdekoodin muutoksilla saatiin aikaan erikokoisia testimääriä uudelleenajettaviksi. Näiden ajojen suuruudet ja kestot tallennetiin, ja niitä vertailtiin. Tämän opinnäytetyön tarkoituksena oli löytää keino saada fuzz-testaustyökalu keskustelemaan DSCA-ohjelmiston kanssa luotettavasti, sekä selvittää kuinka paljon aikaa pystytään säästämään optimoimalla CI-testausta skannaamalla jokainen lähdekoodimuutos kohdennettujen testien saamiseksi verrattuna siihen että jokainen lähdekoodimuutos aiheuttaisi kokonaisvaltaisen testiajon. DSCA-ohjelmistoja käyttämällä saatiin varmuus siitä, että CI-järjestelmien testiajojen pituutta pystytään pienentämään huomattavasti. Keskimääräisen testiajon pituus pystyttiin testeissä jopa puolittamaan
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Wilén, J. (Juhani). "Code change based selective testing in continuous integration environment." Master's thesis, University of Oulu, 2018. http://urn.fi/URN:NBN:fi:oulu-201806062460.

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Continuous integration (CI) is a software engineering practice in which new code is integrated to existing codebase continuously. Integration testing ensures that the changes in code function as intended together with the other parts of the code. The number of tests tend to grow and at some point performing them all becomes infeasible due to limited time between consecutive test executions. Therefore, the traditional retest-all approach becomes inoperative and test optimization techniques are required. Test selection is one of those techniques and it encompasses selecting tests which are relevant to recent changes in the code. The purpose of this thesis is to analyze existing test selection methods, and to implement an initial continuous test selection method in CI environment that reduces duration of integration testing stage and provides faster feedback. The method is aimed to be safe that no additional faults are let through the testing. The test selection is based on changes submitted to version control system (VCS), which are compared with source code file coverages of different hardware variants reported by compilers. In addition, other possible dependencies between variants and code changes are investigated. Those are related to test codes and interfaces. Now the testing of change independent variants can be ignored, and only testing change dependent variants is conducted. At the beginning the implemented test selection method was used in a single software development branch for testing purposes. The results indicate that utilizing the method accomplished slight but statistically significant reduction of integration testing duration with significance level of 0.05. The mean of the testing duration was decreased by 15.2% and the median by 22.2%. However, the implementation still has some inaccuracies in dependency detection, and further improvements are needed to make the test selection method more efficient
Jatkuva integraatio on ohjelmistotuotannon käytäntö, jossa muutokset ohjelmakoodiin integroidaan osaksi jo olemassa olevaa ohjelmistoa jatkuvasti. Integraatiotestauksella varmistetaan, että muutokset koodiin toimivat sen muiden osien kanssa kuten on tarkoitettu. Suoritettavien testien määrä usein kasvaa ajan mittaan, ja jossakin vaiheessa niiden kaikkien suorittaminen ei ole enää järkevää, koska perättäisten testiajojen välinen aika on rajallinen. Siksi perinteinen kaikkien testien uudelleenajaminen tulee haastavaksi ja tarvitaan testien optimointitekniikoita. Testien valinta on yksi näistä tekniikoista. Se sisältää sellaisten testien valinnan, jotka ovat oleellisia testaamaan viimeaikaisia muutoksia koodiin. Tämän diplomityön tarkoituksena on analysoida olemassa olevia testien valintamenetelmiä ja luoda alustava toteutus jatkuvasta testien valintamenetelmästä jatkuvan integraation ympäristössä, millä vähennetään testien kestoaikaa integraatiotestausvaiheessa ja nopeutetaan palautteen saamista. Tavoitteena on, ettei testauksen läpäisseiden vikojen määrä kuitenkaan kasva. Testien valinta perustuu versionhallintajärjestelmään toimitettuihin muutoksiin, joita verrataan kääntäjien raportoimiin lähdekoodikattavuuksiin eri laiteversioille. Lisäksi laiteversioiden riippuvuus testikoodien ja rajapintojen muutoksiin tutkitaan. Ne laiteversiot, jotka eivät ole riippuvaisia mistään muutoksista, jätetään testaamatta, ja ainoastaan muutoksista riippuvaisten laiteversioiden ohjelmakoodit testataan. Testien valintaan toteutettu menetelmä otettiin käyttöön aluksi yhdessä ohjelmistokehityshaarassa sen toiminnan testaamiseksi. Saadut tulokset näyttävät, että menetelmän hyödyntämisellä saavutettiin vähäinen mutta tilastollisesti merkittävä integraatiotestauksen kestoajan lyheneminen merkitsevyystasolla 0,05. Testauksen keston keskiarvo laski 15,2 % ja mediaani 22,2 %. Toteutuksessa on vielä epätarkkuuksia riippuvuuksien havaitsemisessa, ja sitä pitää kehittää paremman tehokkuuden saavuttamiseksi
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Books on the topic "Coke – Testing"

1

Węgiel, Jerzy. Reakcyjność koksu. Kraków: Politechnika Krakowska, 1993.

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Guide to ASTM test methods for the analysis of coal and coke. West Conshohocken, PA: ASTM International, 2008.

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Mayne, Paul W. Cone penetration testing. Washington, D.C: Transportation Research Board, National Research Council, 2007.

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Linden, Maura A. Van der. Testing code security. Boca Raton, FL: Auerbach Pub, 2007.

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Maura A. Van der Linden. Testing Code Security. London: Taylor and Francis, 2007.

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Mishra, Abhishek. iOS Code Testing. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2689-6.

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Greig, N. Concrete core strength testing. London: Concrete Society, 1988.

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Molinaro, Ross, Christopher R. McCudden, Marjorie Bonhomme, and Amy Saenger, eds. Clinical Core Laboratory Testing. Boston, MA: Springer US, 2017. http://dx.doi.org/10.1007/978-1-4899-7794-6.

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Arapidis, Charalampos. Sonar Code Quality Testing Essentials. Birmingham: Packt Publishing, Limited, 2012.

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Lunne, Tom. Cone penetration testing in geotechnical practice. London: Blackie Academic & Professional, 1997.

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Book chapters on the topic "Coke – Testing"

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Edwards, Les, Marvin Lubin, and Jim Marino. "Improving the Repeatability of Coke Bulk Density Testing." In Light Metals 2011, 947–52. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118061992.ch162.

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Edwards, Les, Marvin Lubin, and Jim Marino. "Improving the Repeatability of Coke Bulk Density Testing." In Light Metals 2011, 947–52. Cham: Springer International Publishing, 2011. http://dx.doi.org/10.1007/978-3-319-48160-9_162.

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Wang, Xueqin, and Xiangsheng Wang. "Aging and Coke Depositing on Nanometer ZSM-5 Zeolite." In Combinatorial Catalysis and High Throughput Catalyst Design and Testing, 447–50. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4329-5_22.

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Lubin, Marvin L., Les Edwards, Kevin Harp, and Christopher Kuhnt. "CPC Testing and Relationship Between Coke and Anode Physical Properties." In Light Metals 2017, 1193–202. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51541-0_143.

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Eser, Semih, and John M. Andrésen. "Chapter 39 | Properties of Fuels, Petroleum Pitch, Petroleum Coke, and Carbon Materials." In Fuels and Lubricants Handbook: Technology, Properties, Performance, and Testing, 2nd Edition, 1327–61. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2019. http://dx.doi.org/10.1520/mnl3720170001.

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Mishra, Abhishek. "Testing URLSession." In iOS Code Testing, 211–56. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2689-6_7.

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Jorgensen, Paul C., and Byron DeVries. "Code-Based Testing." In Software Testing, 131–64. 5th ed. Boca Raton: Auerbach Publications, 2021. http://dx.doi.org/10.1201/9781003168447-10.

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Mishra, Abhishek. "Introduction to Test-Driven Development." In iOS Code Testing, 1–11. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2689-6_1.

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Mishra, Abhishek. "Introduction to Behavior-Driven Development." In iOS Code Testing, 317–27. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2689-6_10.

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Mishra, Abhishek. "Applying TDD and BDD Techniques." In iOS Code Testing, 351–405. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2689-6_12.

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Conference papers on the topic "Coke – Testing"

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Penso, Jorge A., Robert Owen, and Masaaki Oka. "TOFD Automatic Ultrasonic Testing for Condition Monitoring of Coke Drums." In ASME 2003 Pressure Vessels and Piping Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/pvp2003-2174.

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Cracking and bulging in welded and internally lined pressure vessels that work in thermal-mechanical cycling service have been well known problems in the petrochemical, power and nuclear industries. In spite of this problem has been studied during the last fifty years, published literature and industry surveys show that similar problems still occur nowadays. Typical examples of this problem are the coke drums in the delayed coking units refinery process. Delayed coking units are among the refinery units that have higher economical yields. To shut down these units represents a high negative economical impact in refinery operations. Also, the maintenance costs associated with repairs are commonly very high. Cracking and bulging occurrences in the coke drums, most often at the weld areas, characterize the history of the operation of delayed coking units. To anticipate through wall cracking in these coke drums, AUT (automatic ultrasonic testing); Dual TOFD (time of flight diffraction) and the Phased Array technique simultaneous inspection system was selected among other inspection techniques as a condition monitoring tool during an unit turnaround. The inspection methodology in combination with fracture mechanics was used to classify discontinuities as acceptable and non-acceptable. This indicated approach helped to optimize the workscope during the turnaround and establish guidelines for inspection and repair of the delayed coker unit. This work presents the different steps followed during the inspection and fitness for service evaluation. Also, this study shows advantages and disadvantages of the AUT-Phased Array technique.
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Chen, Jie, and Zihui Xia. "Experimental Investigation of Coke Drum Material Behavior Under Complex Thermal-Mechanical Loading." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57458.

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Coke drums are vertical pressure vessels used in the delayed coking process in petroleum refineries and oil sands plants. Significant temperature variation during the delayed coking process causes damage in coke drums in the form of bulging and cracking. In order to better understand the damage mechanisms, an experimental investigation of coke drum material behavior under various thermal-mechanical loading conditions was performed. A thermal-mechanical material testing system is successfully designed and implemented. Six types of various thermal-mechanical cyclic tests were performed: 1. cyclic thermal loading under constant uniaxial stress; 2. in-phase thermal and mechanical stress cycling; 3. out-of-phase thermal and mechanical stress cycling; 4. fully-reversed uniaxial cyclic loading with in-phase thermal cycling; 5. in-phase thermal-axial stress cycling with constant circumferential stress; 6. in-phase thermal-axial stress cycling with mean stress. Some of theses tests are similar to the actual loading scenario experienced by the coke drums. The experimental findings lead to better understanding of the damage mechanisms occurring in coke drums such as bulging.
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Penso, Jorge A., and M. Victor Li. "Experiences With Controlled Deposition Welding and Fitness for Service in Coke Drums." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77853.

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Controlled deposition welding (CDW) is a joining technique to refine grains and to temper underlying heat affected zone (HAZ) in the base metal. Applications and technical justifications of CDW for coke drum repairs are presented in this article. CDW procedures have been developed and field implemented both offline and online. Computer modeling to predict weld microstructure and mechanical properties is used to pre-select welding variables and minimize laboratory testing. Several field cases are summarized. Coupons obtained from post weld heat treatment repairs and CDW repairs were collected and fatigue tested. Also shown are examples of fitness for service assessments to define repair strategy.
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Pirón, Javier, and Olivier Hamart. "Modified 9Cr Steel: Coke Resistant Tubes/Pipes Developed by Vallourec for Refinery Furnaces." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21484.

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Abstract A new modified 9 wt% Cr steel has been developed in order to improve the resistance against coke deposition on the internal surface of refinery tube furnaces, in comparison to widely used grades, such as Grade 5 (5 wt% Cr) or Grade 9 (9 wt% Cr). The new grade has an improved composition, based on Cr and Si and further additions of Cu and Ni. This optimal chemical analysis has been specified after extensive laboratory testing on different laboratory and industrial heats. Thermogravimetric analyses have been performed to benchmark various materials (ferritic and austenitic grades) in terms of coking rate. Specimens of these alloys have been exposed to this coking atmosphere in a wide temperature range. The new modified 9Cr steel exhibits an almost 10 times lower coking rates than typical Grade 9 steel. The new 9Cr steel shows allowable stress levels up to 90% higher than Grade 9 at temperatures below 500°C (time independent regime) and up to 7% higher stress levels at temperatures above 500°C (creep regime). The industrial feasibility of production of elbows has been successfully implemented and a welding solution using a commercially available filler material has been established.
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Kaye, Alwyn, Patrick Lester, and Darren Barborak. "Weld Repair of C, Cr-Mo Cokedrums (and Pressure Vessels) Without PWHT." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65161.

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Many of the Cr{1-1/4 to 2-1/4}-Mo{1/2 to 1} pressure vessels in the refining and petrochemical industries such as process reactors, distillation columns, separators, pressurized storage vessels, and heat exchangers are typically vertical columns, most often supported by a circular skirt. Typically, design considerations for these vessels and support skirts are for operating under continuous “steady-state” conditions, where temporary stresses due to short-term “transient” events such as start-up and shutdown are often ignored. Consequences of dynamic and cyclic loading play a very significant role in their life and performance. For Coke drums, survey data from API shows that the skirt-to-drum attachment weld and adjoining area appears to be the most problematic, frequently experiencing low-cycle fatigue cracking due to concentrated stresses. A methodology for repairing the skirt attachment weld of Cr-Mo pressure vessels is provided. When designing a repair approach, consideration should include material and aged condition, extent and location of defects, welding process and consumables, and codes, standards, and regulatory guidelines. When repair by weld metal buildup to rebuild a skirt-attachment weld configuration is considered, weld procedure qualification and adequate mock-ups should be performed in order to ensure a sound repair. Further, when invoking a code compliant repair without post-weld heat treatment by controlled deposition welding or temper bead techniques, proper training of welder operators should be conducted to ensure the techniques are implemented properly. A case study is provided for a Coke drum, where the original design and fabrication of the skirt attachment included an initial SAW weld metal buildup on the 2.25Cr (P5A) cone followed by an SMAW/GTAW attachment weld to the 1.25Cr skirt (P4). During a plant shutdown, a surface breaking crack was detected in the skirt to shell attachment weld by Dye Liquid Penetrant Testing (D-LPT) and confirmed with Magnetic Particle Testing (MPT). Subsequent examination by Phased Array Ultrasonic Testing (PAUT) discovered a large number of volumetric indications, oriented towards the knuckle section internally. The repair approach consisted of 1) Completely remove the existing skirt and the attachment weld (knuckle) in segments, 2) Inspect the cone for remaining flaws, 3) Excavate and repair flaws in cone using temper bead technique, 4) Rebuild knuckle area for skirt to cone attachment with an increased radius using temper bead welding techniques, 5) Install new skirt sections using controlled deposition welding technique. Temper Bead and Controlled Deposition repair welding techniques were utilized to avoid conventional post-weld heat treatment requirements, significantly improving the turn-around time in the field.
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Spadaccini, Louis J., David R. Sobel, and He Huang. "Deposit Formation and Mitigation in Aircraft Fuels." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-217.

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The development of a viable strategy for limiting coke deposition involves combining synergistic approaches for suppressing deposit buildup and reducing its impact on performance. Candidate approaches, including selection of favorable operating conditions (viz., pressure, temperature, heat flux, residence time and passage size) and coke-tolerant heat exchanger designs, were investigated to evaluate their effectiveness and provide a basis for combining them into a single design philosophy. These approaches were evaluated through testing of current jet fuels in single-tubes and segments of heat exchanger configurations at temperatures up to 1000 F, pressures up to 1200 psi and liquid hourly space velocities up to 40,000/h. A key result of this work is the ranking of the importance of heat exchanger operating conditions on carbon deposition, with fuel temperature and those parameters that control species diffusion having the most pronounced impact. Residence time and pressure are of lesser importance. Alternative coke-tolerant heat exchanger designs featuring inter-channel communication were evaluated and ranked, with several of these concepts demonstrating improvement over continuous passages.
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Garcia Garcia, Irene, and Radoslav Stefanovic. "Determination of Critical Crack Size Utilizing a Fracture Mechanics Test in Equipment Under Fatigue." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77937.

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Equipment that is exposed to severe operational pressure and thermal cycling, like coke drums, usually suffer fatigue. As a result, equipment of this sort develop defects such as cracking in the circumferential welds. Operating companies are faced with the challenges of deciding what is the best way to prevent these defects, as well as determining how long they could operate if a defect is discovered. This paper discusses a methodology for fracture mechanics testing of coke drum welds, and calculations of the critical crack size. Representative samples are taken from production materials, and are welded employing production welding procedures. The material of construction is 1.25Cr-0.5Mo low alloy steel conforming to ASME SA-387 Gr 11 Class 2 in the normalized and tempered condition (N&T). Samples from three welding procedures (WPS) are tested: one for production, one for a repair with heat treatment, and one for repair without heat treatment. The position and orientation of test specimen are chosen based on previous surveys and operational experience on similar vessels that exhibited cracks during service. Fracture mechanics toughness testing is performed. Crack finite element analysis (FEA) model is used to determine the path-independed JI-integral driving force. Methodology for the determination of critical crack size is developed.
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Rauf, Walter, and Russell Philipp. "U.S. Navy Experiences Coking of Lube Oil Purifier Heaters." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-60057.

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Normally U.S. Navy ships operate their lubricating oil systems with oil that is clear to light amber in color. Recently, many ships have reported the presence of dark oil and, in some cases, burgundy colored oil. Laboratory analysis of the affected oil has shown that the lube oil has been stressed due to heat. In at least three cases, the flashpoint and the viscosity of the oil were significantly reduced as compared to the samples analyzed from ship’s storage tanks. In one particular case volatile aromatics were discovered possibly indicating that pyrolysis is taking place. In an effort to determine the cause of the heat stress a hand-over-hand tracing of the system was accomplished. Subsequently, the lube oil purifier heater was inspected and coking of the heating elements was discovered. Approximately 65% of the ships inspected have reported fouling of the heating elements ranging from a tar-like substance to severe coking. A land-based lube oil purifier heater was configured to operate in the same manner as a shipboard unit. This unit was instrumented to collect oil and sheath temperature data to aid in determining the temperature within the heater that may cause the lubricating oil to form coke. In addition, laboratory testing is also being conducted to determine the oil’s tendency to coke and at what temperatures the pyrolysis will begin to take place. The purpose of this paper is to discuss the ongoing investigation, results of data collected, the laboratory testing and engineering solutions to minimize or eliminate lube oil coking.
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Pallier, Franz, and Kurt Kaufmann. "Petcoke Co-Firing in a PowerFluid CFBC-Boiler Originally Designed for Coal: Effects on Operation, Efficiency and Desulfurization." In 17th International Conference on Fluidized Bed Combustion. ASMEDC, 2003. http://dx.doi.org/10.1115/fbc2003-047.

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The paper presents the results of an industrial scale combustion test investigating the effects of firing petroleum coke in a CFB-boiler originally designed for bituminous coal. In stage 1 of the testing the petcoke portion was gradually increased up to 100%. As the testing focused on the effects to a CFB-boiler originally designed for a different fuel all relevant information as furnace temperature, material circulation, heat transfer and flue gas emissions were recorded, evaluated and compared to mere coal operation. The paper presents the test results featuring the aspects of boiler operation, boiler efficiency and desulfurization. In stage 2 of the testing the applicability of molded petcoke was investigated. This molded petcoke was prepared by granulating original petcoke and compressing a mixture of petcoke, flyash and limestone. Laboratory tests had indicated an advantegeous behaviour, but due to insufficient mixture in the make-up process the testing of this fuel had to be stopped in an untimely fashion. As the testing of the original petcoke showed quite promising results in operational aspects and efficiency as well, continous co-firing of petcoke at that plant where the testing was executed has been started in February 2002 with a petcoke heat input portion up to 70%.
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Pettinato, Brian C., and Pranabesh DeChoudhury. "Rotordynamic and Bearing Upgrade of a High-Speed Turbocharger." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0249.

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The paper discusses the redesign of a high-speed turbocharger for improved bearing life and mechanical operation. The modifications resulted in reduced oil leakage across the end seal, reduced coke buildup at the turbine, increased thrust load capacity, and improved rotordynamics. In particular, rotordynamic stability was improved by eliminating subsynchronous vibration at the operating speed. The redesign consisted of changing the bearings from a pair of combination journal/thrust bearings to a pair of journal bearings and a double acting thrust bearing at the center of the unit. The active thrust bearing was moved away from the hot turbine end of the machine. The thrust bearing geometry was modified for increased minimum film thickness, reduced metal temperature, and increased load capacity. Inlet and drain passages were revised for better oil flow distribution. Unit rotordynamics were improved by upgrading the journal bearings from three-axial-groove to three-lobe design. The upgraded unit kept the same footprint as the original design with only piping modifications required. Extensive analysis and testing were conducted. Testing of the original and revised turbochargers showed improvements in the redesign with reduced bearing metal temperatures and improved rotordynamic stability. Theoretical results along with test data consisting of bearing performance and vibration data of the original and modified system are presented in this paper.
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Reports on the topic "Coke – Testing"

1

Chudnovsky, Yaroslav, and Aleksandr Kozlov. Development and Testing of the Advanced CHP System Utilizing the Off-Gas from the Innovative Green Coke Calcining Process in Fluidized Bed. Office of Scientific and Technical Information (OSTI), August 2013. http://dx.doi.org/10.2172/1123883.

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Wiemer, G. Cone penetration testing. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2016. http://dx.doi.org/10.4095/297874.

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Wang, Yanli, Sam Sham, and Mark C. Messner. Report on FY19 Testing in Support of Grade 91 Core Block Code Case. Office of Scientific and Technical Information (OSTI), September 2019. http://dx.doi.org/10.2172/1569371.

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Fritz, David J., Christopher B. Harrison, C. W. Perr, and Steven A. Hurd. Choreographer Pre-Testing Code Analysis and Operational Testing. Office of Scientific and Technical Information (OSTI), July 2014. http://dx.doi.org/10.2172/1171431.

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Edis, T., P. Cameron-Smith, K. Grant, D. Bergmann, and C. Chuang. Testing Impact?s Radiation Code. Office of Scientific and Technical Information (OSTI), July 2004. http://dx.doi.org/10.2172/15014455.

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Kurfurst, P. J., and D. J. Woeller. Cone Penetration Testing of Unit B. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132230.

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Miller, D. H., and M. M. Reigel. Formed Core Sampler Hydraulic Conductivity Testing. Office of Scientific and Technical Information (OSTI), September 2012. http://dx.doi.org/10.2172/1056465.

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Witwer, K. S. Test plan for core drilling ignitability testing. Office of Scientific and Technical Information (OSTI), January 1996. http://dx.doi.org/10.2172/470874.

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Vo, Duc Ta, and Garrett Earl McMath. Testing the HM-5s and NaIGEM code. Office of Scientific and Technical Information (OSTI), April 2020. http://dx.doi.org/10.2172/1615658.

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10

Witwer, K. S. Test report for core drilling ignitability testing. Office of Scientific and Technical Information (OSTI), August 1996. http://dx.doi.org/10.2172/657933.

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