Letteratura scientifica selezionata sul tema "LTV Steel Facility"
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Articoli di riviste sul tema "LTV Steel Facility"
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ZINUROV, I. YU. "THE LEADER IN THE TECHNOLOGY AND EQUIPMENT DEVELOPMENT FOR THE ARC FURNACE STEELMAKING INDUSTRY AKONT LTD CELEBRATES 30 YEARS ANNIVERSARY". Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 78, n. 1 (20 novembre 2022): 33–38. http://dx.doi.org/10.32339/0135-5910-2022-1-33-38.
Testo completoAbstract (sommario):
The Scientific and Technical Enterprise (STE) “Akont” celebrated its 30th anniversary in 2021. The information about the scientific and technical achievements of the staff of STE “Akont” is provided in this paper. According to the projects of STE “Akont” 18 ladle-furnaces for the out-of-furnace treatment of steel with capacity from 12 to 300 t have been produced and introduced in production for the last 30 years. It was noted that some of these units were designed according to non-standard scheme. The first Russian twin ladle-furnace facility LF-160-2 (AKP-160-2) developed by Akont was unique. The task of converting electric furnace DSP-100I6 installed in workshop ESPC-6 of Chelyabinsk Metallurgical Plant (ChMK) into a modern electric furnace with the bay window was successfully solved by Akont. In this case bath volume after the reconstruction increased to 145 t. Undoubtedly, the most outstanding achievement of Akont company was modernization of electric furnace No. 8 in workshop ESPC-2 of ChMK. As a result of the furnace modernization, the performance indicators improved drastically; the melting time decreased from 5.5 to 1 hour or less, the electric power consumption decreased from 560 to 334 kWh/t, the durability of the roof increased from 70 to 1500 melts and durability of the tubular panels reached 3000 melting operations. STE Akont Ltd has a number of new original propositions, including the design and technological development of the multifunctional MAGMA aggregate. This gasflame unit can be used for reduction of iron from converter and electric furnace slag and cast iron production. From slag with small additions of CaO and Al2O3 a clinker for cement industry may be obtained. The MAGMA process can be used for recycling of metal-containing radioactive waste from nuclear power plants.
Libri sul tema "LTV Steel Facility"
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LTV Steel-Tundish Yard, East Chicago, Indiana. Atlanta, Ga.?]: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 1994.
Cerca il testo completoAtti di convegni sul tema "LTV Steel Facility"
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Johnson, D. Michael, Peter S. Cumber, Norval Horner, Lorne Carlson e Robert Eiber. "Full-Scale Fracture Propagation Experiments: A Recent Application and Future Use for the Pipeline Industry". In 2000 3rd International Pipeline Conference. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/ipc2000-160.
Testo completoAbstract (sommario):
A full scale fracture propagation test facility has been developed to validate the design, in terms of the ability of the material to avert a propagating fracture, of a major new pipeline to transport gas 1800 miles from British Columbia in Canada to Chicago in the USA. The pipeline, being built by Alliance Pipeline Ltd, will transport rich natural gas, i.e. gas with a higher than normal proportion of heavier hydrocarbons, at a maximum operating pressure of 12,000 kPa. This gas mixture and pressure combination imposes a more severe requirement on the pipe steel toughness than the traditional operating conditions of North American pipelines. As these conditions were outside the validated range of models, two full-scale experiments were conducted to prove the design. This paper will provide details of the construction of the 367m long experimental facility at the BG Technology Spadeadam test site along with the key data obtained from the experiments. Evaluation of this data showed that the test program had validated Alliance’s fracture control design. The decompression data obtained in the experiments will be compared against predictions from a new decompression model developed by BG Technology. The use of the experimental facility and the model to support future developments in the pipeline industry, particularly in relation to the use of high strength steels, will also be discussed.
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Takahashi, Minoru, Masayuki Igashira, Toru Obara, Hiroshi Sekimoto, Kenji Kikuchi, Kazumi Aoto e Teruaki Kitano. "Studies on Materials for Heavy-Liquid-Metal-Cooled Reactors in Japan". In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22166.
Testo completoAbstract (sommario):
Recent studies on materials for the development of lead-bismuth (Pb-Bi)-cooled fast reactors (FR) and accelerator-driven sub-critical systems (ADS) in Japan are reported. The measurement of the neutron cross section of Bi to produce 210Po, the removal experiment of Po contamination and steel corrosion test in Pb-Bi flow were performed in Tokyo Institute of Technology. A target material corrosion test was performed in the project of Transmutation Experimental Facility for ADS in Japan Atomic Energy Research Institute (JAERI). Steel corrosion test was started in Mitsui Engineering & Shipbuilding Co., LTD (MES). The feasibility study for FR cycle performed in Japan Nuclear Cycle Institute (JNC) are described.
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Mora Mendez, Diego Fernando, Markus Niffenegger, Gaojun Mao, Beat Baumgartner e Hans Kottmann. "Thermo-Shock Experiments on Thick-Walled Cylindrical Mock-Ups". In ASME 2023 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/pvp2023-101268.
Testo completoAbstract (sommario):
Abstract Nuclear power plants in Europe are entering in a phase of long-term operation (LTO) and one of the key safety assessments for continuing in operation is the evaluation of pressurized thermo-shock (PTS). Since conducting PTS experiments on real-scale reactor pressure vessels (RPVs) are unaffordable and challenging, the present contribution concerns the test facility for performing thermal shock-like cooling on small thick-walled cylindrical mock-ups. The mock-up contains four equally separated notches. Thermal shock (TS) loading condition without pressure is applied. It is expected Mode I of fracture (opening mode) due to pure tensile hoop stresses generated by the cooling. The loading condition represents a fast cooling (from 300°C to room temperature) similar to the transient due to a Loss of Coolant accident (LOCA) in the real RPV. RPV steel 17MoV 8-4 with an artificially (thermally treated material) increased ductile to brittle transition temperature (DBTT) to values similar to a highly-irradiated RPV at its end-of-life is used. The preliminary experimental results show good performance of the thermo-shock facility confirming that the loading conditions are adequate and demonstrating that the thermal stresses developed in the mock-up are high enough to trigger crack growth and arrest of the precracks in the embrittled steel. The results of the current experiment will be used to validate the ongoing numerical PTS assessment with XFEM.
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Queen, David J., Andreas Felber, Clark Scarborough e Peter Taylor. "Liquefied Natural Gas Pipeline Suspension Bridge Design". In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10461.
Testo completoAbstract (sommario):
A new Liquefied Natural Gas (LNG) plant, in Equatorial Guinea, Africa required a pipeline corridor with supplementary utilities from the processing plant at about 55 m (180’) above sea level, down to the marine loading facility. The use of conventional structures and foundations on the unstable slope had substantial associated costs and risk. Various options were considered and the suspension bridge solution, avoiding the geotechnically unstable slope by providing tower foundations above the slope on stable ground and in the ocean, was selected. Buckland & Taylor Ltd. developed the final design of a 350 m (1148’) main span inclined deck, suspension bridge to carry the pipeline corridor across the unstable geotechnical slope. The configuration of the bridge was dictated by the site conditions and the allowable movements of the pipelines. The superstructure consists of steel towers approximately 60 m (197’) tall with two main cables, each composed of three 89 mm (3 1/2”) strands, supporting a 12 m (39.4’) wide truss deck system. The deck of the bridge is fully grated for safety and ease of installation of the pipes and utilities once the main bridge structure was complete. With the pipes in position, the walkway provides continuous access to the pipelines and utilities for future maintenance, as well as provides a fixed pedestrian route from the plant to the loading facility. The details of all of the components were developed to address the demanding schedule, available fabrication facilities, shipping restrictions to the remote location, flexibility in the erection sequence and ease of construction. Repetitive structural components were detailed to simplify fabrication, facilitate transportation to the site and improve the schedule during construction. The aggressive project schedule dictated that field investigations were still being undertaken while final design was being completed. Buckland & Taylor Ltd. made design changes to suit field conditions or methods of construction with minimal impact on fabrication and construction. The design process considered various methods of erecting the bridge to simplify details and improve the construction schedule. The design of the suspension bridge was initiated in August 2004, with the conceptual design complete in a month and the detailed design issued for construction in January 2005. The main foundation construction and structural steel fabrication proceeded immediately with priorities set to meet the construction schedule. With the progress of design, fabrication and construction, Buckland & Taylor Ltd. anticipates that pipes will be installed on the bridge 20 months after the start of design.
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Duwig, Christophe, Jan Fredriksson e Torsten Fransson. "Production of Simulated Gasified Biomass for Pilot Plant Applications". 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-0368.
Testo completoAbstract (sommario):
The design of modern Low Heating Value (LHV) fuel combustion devices, such as gas turbine combustors, relies heavily on numerical simulations. In addition, numerical predictions are always validated by experimental tests. In this work, an experimental facility was built. The fuel input power of the combustor was 300 kW. Such facility requires a gas flow of typically 0.06 kg/s, so a syngas production at a reasonable cost was required to undertake tests under real working conditions. Within this work, an inexpensive and flexible syngas generator has been designed, produced and tested. The main idea was to use cheap available gas fuels and to crack it in order to obtain the syngas. Such conversion is heavily used in oil refineries and called “Steam Reforming”. Propane is used as a fuel and is cracked on a commercial steam reforming catalyst. To ensure the wanted ratio of C/H and C/O in the final product, CO2, H2O and air were added to the fuel gas. Catalytic cracking is needed as propane cracking kinetics are low at wanted operation temperatures, namely 900 to 1100 K. Care is taken to avoid carbon formation in the gasification device which may cause decomposition of the stainless steel reactor vessel. The gasification device was used to feed a 300kW combustor at 2.8 bar pressure. The device was successfully integrated into a test rig and used for a burner study. The obtained composition was quite close to a typical gasified biomass composition. A wide range of different compositions has also been explored. Hydrocarbon concentration range was investigated from 3 vol% up to 16 vol% (Methane equivalent). The CO2 concentration varied between 13 vol% and 20 vol%. The syngas temperature was kept at an interval between 900 and 1100 K. The device provided 0.06 kg/s of a 3 to 5 MJ/kg heating value fuel. The operating costs of the gasification device were found about one tenth of the bottled gas price.
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Naziris, Frideriki, Casper Versteylen, Frederick Frith, Marcel Bregman e Murthy Kolluri. "Development of Mini-Compact Tension Specimen Fabrication and Test Methods in Hot Cell for Post-Irradiation Examination of Reactor Pressure Vessel Steels". In ASME 2021 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/pvp2021-61027.
Testo completoAbstract (sommario):
Abstract Most standard surveillance programs for pressurized water reactors (PWR), do not contain enough surveillance specimens for their long-term operation (LTO) beyond the original design life of 40 years. The use of testing methods based on small/sub-sized specimen such as mini-CT (0.16 CT, 4 mm thickness) is considered a promising approach to overcome this limitation. The feasibility of fracture toughness testing using sub-sized CT specimen has been generally demonstrated in Japanese-US lead Round Robin programs for un-irradiated materials. However, application of miniature testing techniques on irradiated materials in hot cells comes along with several technical challenges such as remote controlled machining, application of the extensometers, manipulator sensitivity etc. In addition, the dimensional tolerances of the standard CT specimen defined in the ASTM E1921 standard are defined as a function of specimen width, resulting in severer absolute tolerance for the miniature specimen. This paper presents an in-cell fabrication method of a modified mini-CT specimen and a testing facility suitable for hot cell use. This work is performed at NRG within the framework of the STRUMAT project, funded by the Netherlands Ministry of Economic Affairs. A slightly modified miniature CT specimen is chosen, which allows “outboard” clip gage mounting for direct load-line displacement (LLD) measurement. In addition, a wide notch configuration with a height of 0.6 mm, 0.1 mm wider than specified in the ASTM E1921 standard, is used. This modified specimen geometry facilitates the in-cell fabrication of the mini-CT specimen and eases the remote handling and testing procedure. Three-dimensional finite element analysis validation was carried out to determine the effect of these modifications on the stress state of the specimen. It is demonstrated that the modifications to the mini-CT specimen geometry will not lead to significant deviations in the stress patterns and J-integral values compared to the standard geometry.
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Yamamoto, Ikuo, Toshiyuki Kosaka, Hirofumi Nakatsuka, Peter Halswell, Lars Johanning e Sam Weller. "Development of Strong Mooring Rope With Embedded Electric Cable". In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-19319.
Testo completoAbstract (sommario):
Abstract Synthetic fibre ropes are in widespread use in maritime applications ranging from lifting to temporary and permanent mooring systems for vessels, fish farm, offshore equipment and platforms. The selection of synthetic ropes over conventional steel components is motivated by several key advantages including selectable axial stiffness, energy absorption and hence load mitigation, fatigue resistance and low unit cost. The long-term use of ropes as safety critical components in potentially high dynamic loading environments necessitates that new designs are verified using stringent qualification procedures. The International Organization for Standardization (ISO) is one certification body that has produced several guidelines for the testing of synthetic ropes encompassing quasi-static and dynamic loading as well as fatigue cycling. The paper presents the results of tension-tension tests carried out to ISO 2307:2010, ISO 18692:2007(E) and ISO/TS 19336:2015(E) on 12-strand rope with embedded electric cable constructions manufactured by Ashimori Industry Co. Ltd from Vectran fibres. The purpose of the tests was to characterise the performance of a novel strand construction (SSR) and compare this to a conventional 12-strand construction. Utilising the Dynamic Marine Component test facility (DMaC) at the University of Exeter several key performance metrics were determined including; elongation, minimum break load (MBL), quasi-static, dynamic stiffness and embedded cable resistance. During the ISO 2307:2010(E) test programme the samples were tested dry and during the ISO 18692:2007(E) and ISO/TS 19336:2015(E) test programmes the samples were fully submerged in tap water after being soaked in water for at least 24 hours. Two methods were used to quantify sample extension: i) an optical tracking system and ii) a potentiometer. Axial compression fatigue and cyclic loading endurance tests were also carried out on Vectran sample. Failure of the Vectran sample or embedded cable did not occur during tests carried out using DMaC. Further tests and sample analysis were also carried out by Ashimori Industry Co. Ltd. Quasi-static bedding-in at 50% MBS and cyclic load endurance test with 6000 cycles between 3.57% MBS and 53.6% MBS was completed. The Effective Working Length (EWL) was 3.821 m before testing and 3.974m after testing. The resistance of the cable increased from 9.6962 Ω to 9.7693Ω during the test and importantly the embedded cable did not fail. Each tensile loading cycle of the rope caused a measurable variation in wire resistance; approximately 0.01Ω. The data obtained during these tests will provide insight into the behaviour of these materials, which will be of use to rope manufacturers and mooring system designers, in addition to offshore equipment and vessel operators.
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Weller, S. D., P. Halswell, L. Johanning, T. Kosaka, H. Nakatsuka e I. Yamamoto. "Tension-Tension Testing of a Novel Mooring Rope Construction". In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61915.
Testo completoAbstract (sommario):
Synthetic fibre ropes are in widespread use in maritime applications ranging from lifting to temporary and permanent mooring systems for vessels, offshore equipment and platforms. The selection of synthetic ropes over conventional steel components is motivated by several key advantages including selectable axial stiffness, energy absorption (and hence load mitigation), fatigue resistance and low unit cost. The long-term use of ropes as safety critical components in potentially high dynamic loading environments necessitates that new designs are verified using stringent qualification procedures. The International Organization for Standardization (ISO) is one certification body that has produced several guidelines for the testing of synthetic ropes encompassing quasi-static and dynamic loading as well as fatigue cycling. This paper presents the results of tension-tension tests carried out to ISO 2307:2010, ISO 18692:2007(E) and ISO/TS 19336:2015(E) on three different 12-strand rope constructions manufactured by Ashimori Industry Co. Ltd from polyester and Vectran® fibres. The purpose of the tests was to characterise the performance of a novel 12-strand construction and compare this to a conventional 12-strand construction. Utilising the Dynamic Marine Component test facility (DMaC) at the University of Exeter several key performance metrics were determined including; elongation, minimum break load (MBL) and quasi-static and dynamic stiffness. During the ISO 2307:2010(E) test programme the samples were tested dry and during the ISO 18692:2007(E) and ISO/TS 19336:2015(E) test programmes the samples were fully submerged in tap water after being soaked for at least 24 hours. Two methods were used to quantify sample extension: i) an optical tracking system and ii) a draw-wire potentiometer. Axial compression fatigue and cyclic loading endurance tests were also carried out on two Vectran® samples. Further load-to-failure tests and sample analysis were also carried out by Ashimori Industry Co. Ltd. It was found that the MBL of the samples exceeded the values specified by the manufacturer (by 7.7–29.5% for the polyester samples) with failure occurring at the splices in all cases and minor abrasion noted in several locations. The measured MBL of the novel polyester Straight Strand Rope (SSR) construction was up to 16% higher than the conventional construction with increases of quasi-static and dynamic stiffness of up to 6.8%. Differences between the viscoelastic and viscoplastic behaviour of the samples were also noted. The data obtained during these tests will provide insight into the behaviour of these materials and different rope constructions which will be of use to rope manufacturers, mooring system designers in addition to offshore equipment and vessel operators.
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Caratozzolo, Francesco, Mario L. Ferrari, Alberto Traverso e Aristide F. Massardo. "Real-Time Hardware-in-the-Loop Tool for a Fuel Cell Hybrid System Emulator Test Rig". In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54315.
Testo completoAbstract (sommario):
The Thermochemical Power Group of the University of Genoa built a complete Hybrid System emulator test rig constituted by a 100 kW recuperated micro gas turbine, an anodic circuit (based on the coupling of a single stage ejector with a stainless steel vessel) and a cathodic modular volume (located between the recuperator outlet and combustor inlet). The system is sized to consider the coupling of the commercial micro turbine, operated at 62 kW load, and a planar Solid Oxide Fuel Cell (SOFC) to reach the overall electrical power output of 450 kW. The emulator test rig has been recently linked with a real-time model of the SOFC block. The model is used to simulate the complete thermodynamic and electrochemical behavior of a high temperature fuel cell based on solid oxide technology. The test rig coupled with the model generates a real-time hardware-in-the-loop (HIL) facility for hybrid systems emulation. The model is constituted by a SOFC module, an anodic circuit with an ejector, a cathodic loop with a blower (for the recirculation) and a turbine module. Temperature, pressure and air mass flow rate at recuperator outlet (downstream of the compressor) and rotational speed of the machine are inputs from the plant to the model. The turbine outlet temperature (TOT) calculated by the model is fed to the machine control system and the turbine electric load is moved to match the model TOT value. In this work different tests were carried out to characterize the interaction between the experimental plant and the real-time model; double step and double ramp tests of current and fuel characterized the dynamic response of the system. The mGT power control system proved to be fast enough, compared to the slow thermal response of the SOFC stack, and reliable. The hybrid systems was operated at 90% of nominal power with about 56% of electrical efficiency based on natural gas LHV.