The central laboratory Coke Production of PJSC «ArcelorMittal Kryvyi Rih» in present-day condition.

THE CENTRAL LABORATORY OF COKE PRODUCTION AT PJSC «ARCELORMITTAL KRYVYI RIH» IN PRESENT-DAY CONDITIONS © O.P. Chernousova, N.V. Mukina (Coke Production of PJSC «ArcelorMittal Kryvyi Rih», 50095, Dnipropetrovsk region, Kryvyi Rih, Kryvorizhstal str., 1, Ukraine), A.Yu. Martynova, PhD in Technical Sciences (State Enterprise "Ukrainian State Research Coal Chemical Institute (UHIN)", 61023, Kharkov, Vesnina st., 7, Ukraine) The article discusses the scientific and methodological organization of analytical control at the coke production of PJSC "ArcelorMittal Kryvyi Rih" (CP AMKR), as well as the results of ongoing scientific and methodological measures to ensure confidence in the results of measurements carried out in the central laboratory (CL CP AMKR). Thus, the CL CP AMKR was one of the first in the industry to put into use the test installation "KARBOTEST", which allows without the involvement of third parties to carry out important laboratory research and enables the laboratory staff to quickly develop recommendations for optimizing the composition of coal charges and improving the quality of coke. The unit is designed to test the coking process of coal mixtures and certain grades of coal concentrates under temperature conditions similar to those in coke oven batteries. CL CP AMKR introduces express methods for the analysis of chemical coking products and was one of the first to introduce a refractometric method for determining the mass fraction of distillate up to 180 ° C in crude benzene. The use of this method can significantly reduce the measurement time, avoiding the cumbersome distillation procedure, and reduce the sample volume for analysis from 100 cm3 to a few drops. In order to ensure the uniformity, quality of measurements and tests, the CL on an ongoing basis takes part in interlaboratory comparative tests of almost all types of raw materials and products entering and produced by it. These are the products that are stable over time in terms of their quality indicators, for example, coal coke, as well as products whose individual indicators can change over time (crude benzene, coal tar, etc.). Keywords: measurement, quality control, coal concentrates, coke, chemical products, qualification confirmation, experimental coking, uncertainty, interlaboratory experiment, accreditation. Corresponding author A.P. Chernousova, е-mail: [email protected]

URBAN NETWORK OF AIR QUALITY MEASUREMENT NODES

Smart city is a city that increases the interactivity of its components and put emphasis on their functionality. Internet of Things technology (IoT) is an innovative solution in environmental protection. Usually, information on air quality is very scattered. This paper describes the test stages of pre-implementation works, focusing on the presentation of the technical design of the measurement nodes and the assumptions of the IT project. The goal of the project Intelligent Wireless Sensor Network Infrastructure (IIBSC) is, among others, to create a dense network of air quality measurement nodes at city, district or even street level. The concept is based on Internet of Things (IoT) technology using a matrix construction tool connected to multiple identical measurement nodes located in the test area. The project developed a hardware platform supporting sensors and resistant to external factors, and an ISIMPIO information platform based on edge processing technology for processing data from air quality sensors. Due to the use of Internet of Things (IoT) technology, an edge server using edge processing was designed. Edge server provides a complete ecosystem for building edge applications that are fully optimized for seamless field work. In addition, it allows the implementation of integrated Python software, the MQ Telemetry Transport support protocol (MQTT), time-series database, firmware update over a wireless network, and built-in security system. Measuring the concentration of particulate matter and other substances in the air will be useful for specialists assessing their dynamics. The technology and test installation selected corresponds to the leading solutions in this field in Europe and, in the future, should also be extended to less urbanised areas.

Investigation of slippage and wear in rolling bearings of machines

The purpose of this work was to study the processes of slipping and wear in the sliding bearings of machines. It is determined that slippage in bearings is the main cause of bearing parts failure according to the criterion of wear. Analytical relations for determining the amount of slip and sliding path in the bearing are presented. For experimental research of sliding in rolling bearings the test installation is designed. Experimental tests on the effect on load slip, sliding speed and lubrication conditions in the bearing were performed. The model of wear of rings of the sliding bearing on the basis of a solution of a wear contact problem is offered. The formulas for calculating wear and parameters of the wear model are obtained. The obtained results are recommended to evaluate the influence of design and technological factors on the durability of rolling bearings by the criterion of wear.

Crash Testing and Evaluation of Culvert-Mounted Midwest Guardrail System

Concrete box culverts are usually installed under roadways to allow water drainage without affecting the motoring public. Culvert openings can represent a hazard on the roadside when they do not extend outside of the clear zone, and often require safety treatments in the form of roadside barriers. In this study, a modified design of Midwest Guardrail System (MGS) was evaluated for installation on a low-fill culvert with the strong-post attachment using through-bolts and epoxy anchorage through full-scale crash testing. The test installation consisted of MGS with a 31 in. top rail height, supported by W6 × 9 posts, spaced at 37½ in., attached to a low-fill culvert’s top slab with a 12 in. offset from the back of the post to the culvert headwall. Two crash tests were conducted according to the American Association of State Highway and Transportation Officials’ (AASHTO) Manual for Assessing Safety Hardware (MASH) 2016 Test Level 3 impact safety criteria. In test number CMGS-1, a 2,428-lb car impacted the MGS attached to the culvert at a speed of 61.3 mph and at an angle of 25.1°. In test number CMGS-2, a 5,013-lb pickup truck impacted the MGS attached to the culvert at a speed of 62.8 mph and an angle of 25.7°. In both tests, the vehicle was safely redirected and captured. Both tests were deemed acceptable according to TL-3 safety criteria in MASH. Recommendations were made for the safe installation of MGS atop low-fill culverts as well as transitions from the standard MGS to the culvert-mounted MGS.

Online ground temperature and soil moisture monitoring of a shallow geothermal system with non-conventional components

<p>We present first results from a newly developed monitoring station for a closed loop geothermal heat pump test installation at our campus, consisting of helix coils and plate heat exchangers, as well as an ice-store system. There are more than 40 temperature sensors and several soil moisture content sensors distributed around the system, allowing a detailed monitoring under different operating conditions.</p><p>In the view of the modern development of renewable energies along with the newly concepts known as <em>Internet of Things and Industry 4.0</em> (high-tech strategy from the German government), we created a user-friendly web application, which will connect the things (sensors) with the open network (www). Besides other advantages, this allows a continuous remote monitoring of the data from the numerous sensors at an arbitrary sampling rate.</p><p>Based on the recorded data, we will also present first results from numerical simulations, taking into account all relevant heat transport processes.</p><p>The aim is to improve the understanding of these processes and their influence on the thermal behavior of shallow geothermal systems in the unsaturated zone. This will in turn facilitate the prediction of the performance of these systems and therefore yield an improvement in their dimensioning when designing a specific shallow geothermal installation.</p>

Design and Development of Aeroderivative Gas Turbine Lifting and Handling Structures

Gas turbines Lifting devices (such as lifting lugs, eye bolts, trunnions, are provided on large stationary gas turbine parts as an aid in manufacturing, assembly, transport, shipping, test, installation, repair, and serviceability. Trunnions are used to lift the entire turbine including the base during assembly, transportation and installation Similarly, lugs are used to lift major components such as stator tube casings and subassemblies. In some circumstances there are geometric, fatigue, or assembly constraints that make the use of lugs problematic. In these circumstances, other approved lifting devices such as eye bolts, swivel hoist rings, and shackles may be used. Other devices may also be used for parts smaller than stator tube casings. This paper presents the design and development of the Aeroderivative gas turbine lifting and support lug features which are used for lifting, handling and transportation of the full gas turbine. It describes the challenges encountered during development of LPT lifting lugs to meet product requirements. The effects of full engine deformations due to support legs under worst case conditions of full engine handling are presented here. The benefits resulted due change in lug position are explained which is leveraged for the final production design. It also talks about the various design options considered to reduce stresses and simplify the lugs manufacturing.

EXPERIMENTAL TEST INSTALLATION OF BENDING REINFORCED CONCRETE BEAM ELEMENTS

The article outlines a new technical solution related to the field of construction, in particular to the testing technique, the testing of materials and structures, and the application for conducting experimental studies of the strength and deformability parameters of reinforced concrete beam elements under static bending conditions. The experimental installation includes a pre-assembled booth, a loading mechanism, a force measuring device, a thrust element and a strap clamp. In this case, the stand contains a stop element, jacks, tensioning clamps, test specimen. The supporting element is composite and contains a base in the form of a channel and an amplifier in the form of a two-lobe. Clamping hooks are made in the form of tight fastened anchorages, equipped with roller supports. As a loading device, jacks are installed in the crevice-slot of the channel and secured by mounting screws to the base of the thrust element. The compact, simple and easy experimental installation with the increased reliability of the power device, tensioning clamps and roller bearings of the subject under bending of the concrete sample is offered.

Weibull distribution and dynamics of germination of Rangpur lime seeds at different temperatures

Rangpur lime is the most commonly used rootstock in Brazil, and its propagation occurs through seeds. Currently, no methodology is described in the prescriptions of the Rules for Seed Testing to perform the germination test of Rangpur lime. Thus, this research aimed to study the dynamics of germination in Rangpur lime seeds according to the Weibull distribution under the effect of different temperatures and lots. The experiment was conducted in a completely randomized design, with treatments arranged in a 3 × 5 factorial scheme (temperatures of 25, 30 and 35 °C for the germination test and five seed lots, respectively) and four replications. The percentage of germination, the number of days required obtaining 50% of germination, and the parameters of the Weibull equation were determined. The optimum temperature for germination of Rangpur lime seeds was 30 °C, with the first and last counts at 21 and 30 days after test installation, respectively. The germination process can be described by the three-parameter Weibull cumulative distribution function.

Experimental Investigations of Energy and Exergy Efficiencies of an Evacuated Tube Solar Collector

The main purpose of the analysis is to determine the influence of the weather and operating conditions on the energy and exergy efficiencies of an evacuated tube solar collector, heat pipe type with a mixture of water and propylene glycol (50%/50%) as a working fluid under the Polish climate conditions (the geographical coordinates for Lublin: Latitude 51°15′ N and longitude 22°34′ E), according to the experimental data. The solar collector with an aperture area of 3.6 m2 is a main component of the solar hot water test installation located in the laboratory of the Faculty of Environmental Engineering, Lublin University of Technology. Studies have been presented for August. Based on the results, the average daily energy efficiency of the solar collector at the level of 34% (14.3–58.8%) and the average daily exergy efficiency of the solar collector at the level of 2.25% (0.86–3.75%) were established.

Design and Full-Scale Testing of M50/P1 Bolt-Down Removeable Bollard System

The purpose of this project was to design and test a new bolt-down bollard system that meets the requirements of American Standards for Testing Materials (ASTM) Designation F2656-15 M50/P1 impact conditions. The test installation consisted of three vertical 10-in. diameter (nominal) bollards with welded base plates bolted to a shallow reinforced concrete foundation. The foundation for this system was sized to reduce the foundation embedment. Shallow foundations are often necessary for use in cities and urban areas where utilities can conflict with deeper foundations. Standard common members and materials were used in the installation to accommodate fabrication and installation in locations all over the world. The bollards can be removed to provide access if necessary. Full-scale testing was performed on the bolt-down bollard system. The bollard system design for this project successfully met the requirements of M50/P1 with a total payload penetration of less than 1 m. The new bollard design successfully met all the performance requirements for ASTM F2656-15 M50/P1. Details of the design and testing of the bolt-down bollard system are provided in this paper. Crash-testing videos and additional information on the design and full-scale testing will be provided in the presentation.