Installation Of Technology Research Articles

A Study of Heat Recovery and Hydrogen Generation Systems for Methanol Engines

Biofuels are the most essential types of alternative fuels, which currently have significant potential to reduce CO2 emissions compared to fossil fuels. Methanol is a more efficient fuel than petrol due to its physicochemical properties, such as a higher latent heat of vaporization, research octane number, and heat of combustion of the fuel–air mixture. Also, biomethanol is cheaper than traditional petrol and diesel fuel for agricultural countries. The authors have proposed a new approach to improve the characteristics and efficiency of methanol diesel engines by using biomethanol mixed with hydrogen instead of pure biomethanol. Using a hydrogen–biomethanol mixture in modern engines is an effective method because hydrogen is a carbon-free, low-ignition, highest-flame-rate, high-octane fuel. A small quantity of hydrogen added to biomethanol and its combustion in an engine with a heat exchanger increases the combustion temperature and heat release, increases engine power, and reduces fuel consumption. This article presents experimental results of methanol combustion and a hydrogen-in-methanol mixture if hydrogen was retained due to the utilization of the heat of the exhaust gases. The tests were carried on a single-cylinder experimental engine with an injection of liquid methanol and gaseous hydrogen mixtures. The experiments showed that green hydrogen generated onboard the car due to the utilization of heat significantly reduced fuel costs of engines of vehicles and technological installations. It was established a hydrogen gaseous mixture addition of up to 5% by mass to methanol requires a corresponding change in the coefficient of excess air to λ = 1.25. Also, using an additional hydrogen mixture requires adjustment at the ignition moment in the direction of its decrease by 4–5 degrees of the engine crankshaft. Hydrogen gas mixture addition reduced methanol consumption, reaching a maximum reduction of 24%. The maximum increase in power was 30.5% based on experimental data. The reduction in the specified fuel consumption, obtained after experimental tests of the methanol research engine on the stand, can be implemented on the vehicle engines and technological installations equipped with an onboard heat recovery system. Such a system, due to the utilization of heat and the supply of additional hydrogen, can be implemented for engines that work on any alternative or traditional fuels.

Prediction of the Future Trends of Housing Project Development with Modified Delphi Technique

This research was initiated to study the trend of the housing projects in the next ten years (2022-2031), with the applied Modified Delphi Technique. The research was conducted by interviewing five experts with more than ten years of knowledge and experience in design, construction, technology, location, and marketing. The gathered trends were applied to create questionnaires in order to conduct two rounds of surveys to assess the consensus level of ten experts with at least ten years of experience in the real estate industry, according to the consensus analysis method from the Modified Delphi Technique. Thirteen trends were found from the study. There are four design trends: more beautiful façade, soundproof wall, universal design furniture, and universal design house building. In addition, eco-friendly materials and modular construction systems were found to be construction trends while smart home device installation and active air flow technology were found to be technology trends. Regarding the trend of the project location, the projects tend to be located in areas expanding into the suburbs. Finally, four marketing trends were also reported: Virtual Reality utilization in sales presentation, advertising to reach more customers, inviting social media influencers to play a role in reviewing projects, providing credit consulting services and refunding of reservation money if a customer’s loan is not approved. The results of the study provide information to all parties involved in planning strategies and operating a business in developing housing estates in the future.

Analysis of the Problems of the Research and Modernization of Emission Units of Analytical Devices of Vacuum Electronics

In various electron-optical and ion-beam devices and vacuum electronics installations, emission elements and units are used to extract and form beams of charged particles. Their focusing properties significantly affect the quality parameters and technical characteristics of the analytical devices and technological installations in which they are used. Due to the specificity of the initial conditions during the formation of the beams of charged particles in the area of charged particle extraction, the methods of studying single and conventional immersion electron lenses are not suitable for the high quality theoretical and numerical studies of the properties of immersion objectives. In this paper, theoretical and numerical studies were conducted on the problems in analyzing the focusing parameters of charged particles in emission elements and units when solving problems of designing and upgrading devices and installations of vacuum electronics. As a result of the studies, a theoretical method for studying cathode lenses with a curved optical axis was developed and options for solving problems in correcting aberrations of emission elements and units were proposed.

The role of hydropower in decarbonisation scenarios

An increased penetration of renewable energy sources is essential for the energy transition. A major role will be played by wind and solar, as they are widely available. Hydropower is another crucial resource, currently covering large shares of power generation (e.g., Norway, Italy, Brazil). Despite little expected growth, in a context of increasing electrification, improved integration of hydropower can play a critical role thanks to programmable operation. This work addresses the modelling of hydropower flexibility in energy system models and analyses the impact of hydropower operation on CO2 emission-constrained scenarios. To implement the study, a detailed dataset of the Italian programmable hydroelectric plants is created, using open-source information, covering location, rated power, and storage capacity. Inflow timeseries are derived from historical operational data. These new sets of data are employed in OMNI-ES (a multi-node, multi-sector, and multi-vector energy system model) to study optimal configurations and operation of the Italian energy system in decarbonisation scenarios, such as net-zero-CO2 and Fit-for-55 targets. Considering different operational strategies and multiple historical reference years (impacting the inflow), results demonstrate significant changes in hydropower behaviour and highlight its relevance as zero-carbon resource in terms of both power and energy output, influencing the installation of other technologies.

АЛЬТЕРНАТИВНОЕ ИСПОЛЬЗОВАНИЕ НЕСУЩИХ ЭЛЕМЕНТОВ ИНВЕНТАРНЫХ ОПАЛУБОЧНЫХ СИСТЕМ ПРИ МОНТАЖЕ И ДЕМОНТАЖЕ ЖЕЛЕЗОБЕТОННЫХ ПЕРЕКРЫТИЙ

The paper substantiates the expediency of using widespread load-bearing racks, frame systems and beams for the construction of formwork monolithic floors of multi-storey civil construction in other types of construction work in prefabricated monolithic construction and reconstruction of civil facilities. Examples and descriptions of organizational and technological schemes for the construction of prefabricated monolithic frames with the use of inventory spatial frames and racks of adjustable length with glued wooden beams, mainly from well-known Doka and PERI companies, as supporting elements for the organization of alignment and temporary fixing of hollow floor slabs during their installation. Examples of the use of the same bearing elements of formwork systems in projects of reconstruction and liquidation of multi-storey civil facilities are presented. In these cases, they were intended to ensure the stability of the reconstructed parts of buildings during their separation and extraction according to the intended parts. For this purpose, the schemes of using diamond cutting technologies of reinforced concrete structures patented by the authors in reconstruction projects of civil buildings in the Crimea are shown. Subject of research: technological equipment for the production of construction, installation and reconstruction works to ensure their efficiency and safety using beams, frames and racks of inventory formwork systems of monolithic and prefabricated reinforced concrete floors. Materials and methods: analysis of the state of the issue according to literary and patent sources, justification of expediency and modeling of technology and organization of construction, installation and reconstruction works at specific civil facilities in Crimea, assessment of economic efficiency, industrial and environmental safety of the proposed innovations. Results: organizational and technological schemes for the installation of temporary supporting and regulating systems for the installation and dismantling of reinforced concrete floors made up of inventory elements of industrial formwork systems of both domestic and foreign origin are reasonably presented. The technological and economic efficiency, as well as the technical and environmental expediency of innovations for reasons of life safety are shown. Conclusions. The expediency of using elements of inventory formwork systems of monolithic floors to create temporary supporting structures from them during the installation and dismantling of reinforced concrete floors is shown. Examples of such applications are presented when installing ceilings of prefabricated monolithic frames of specific civil facilities, as well as diamond cutting of similar structures during their reconstruction or liquidation.

Results of experimental development of a laboratory water distillation installation based on a heat pump and a photovoltaic panel

Modern technologies and the continuous rise in water consumption require efficient and environmentally friendly methods of its extraction. According to the energy development strategy of the Russian Federation until 2035, the use of alternative energy sources in industry is a priority task for production. The use of renewable resources to produce distilled water for the needs of enterprises is becoming increasingly important. The innovative technology of a laboratory installation, combining water distillation using a heat pump and a photovoltaic panel, allows not only to obtain purified water, but also to heat the coolant before chemical purification. To create a laboratory stand, it is necessary to study the operating principles of the installation, divide the device into units: the main stand and the vacuum distiller, then model a three-dimensional image of each part of the complex in the SolidWorks software package. Based on the obtained models, a functional diagram of the complex is developed to obtain a coolant of the given parameters, and an algorithm is compiled for predicting the temperature of the heated water in the heat pump. The obtained installation test results are processed, and compared with theoretical data from tables of refrigerant properties, and a conclusion is drawn. The technology for producing purified water is aimed at replacing imported technologies and using renewable energy sources. The development of technologies for producing clean water is a priority for the development of the Russian energy sector. The results obtained indicate the potential of the laboratory installation for use in various areas where a reliable and environmentally friendly supply of distilled water is required, for example, in coastal areas for industrial facilities or agricultural enterprises.

Critical analysis of non-price actions driving installation of biogas technology to upgrade existing buildings in Ghana: a demand theory approach

The gradual degradation of faeces and other organic materials through the process of fermentation results in the manufacture of biogas. Generally, as the cost of construction increases, the demand for biogas should fall, which in this case is the opposite. Thus, this study seeks to identify drivers of the current surge in the installation of the biogas system in Ghana for the decisions that could be implemented to reinforce gains. This study adopted a quantitative survey-based assessment approach to identify the drivers for policy formulation. The results show that reductions in greenhouse gas (GHG) emissions, training of trainees and the community, cost savings, public education, bank loans, available waste stock, etc. are the key drivers accelerating the continuous growth of the industry in Ghana. Furthermore, a high degree of agreement was observed from the participants regarding the non-price drivers of biogas. The results present government agencies including the Ministry of Energy, the Energy Commission and industries with an action plan to restructure the concept of renewable energy sources in Ghana. Overall, this study provides a comprehensive outlook of biogas generation system, which could be explicitly used in capacity development to create a sustainable progress of biogas development in Ghana.

Annual and Seasonal Variation of the Ocean Thermal Resources off the Mexican Coast

A large amount of thermal energy is stored in the oceans between the tropics, available for conversion into electrical energy using OTEC technology. The aim of this study was to determine the annual and seasonal variability of the oceanic thermal resource in Mexico. Using the WOA18 database, we mapped surface temperature at a 10 m depth, deep cold water (<5 °C), vertical temperature difference (18 and 20 °C), and temperature anomalies. From the results, four areas were analyzed as being suitable for the installation of OTEC technology: Pacific (A), Los Cabos (B), Caribbean (C), and Gulf of Mexico (G). The optimal thermal resource (≥20 °C) was found between a 400 and 1000 m depth in all seasons in A and C, in spring, summer, and autumn in G, and only in summer and autumn in B. The suboptimal thermal resource (between 18 and 20 °C) was present between 400 and 800 m in all seasons in A, C, and G, and in summer and autumn in B. These results provide new information of utmost importance for future location and design considerations of OTEC plants on Mexican coasts, and the methodology can be used in other areas where there is a lack of field data and the development of OTEC technology is being considered.

ТЕПЛОФИЗИЧЕСКАЯ МОДЕЛЬ И РЕЗУЛЬТАТЫ ЭКСПЕРИМЕНТАЛЬНОГО ИССЛЕДОВАНИЯ ГАЗИФИКАЦИИ ДРЕВЕСНЫХ И РАСТИТЕЛЬНЫХ ОТХОДОВ

The article compares the calculation results using the developed thermophysical composition model for the study of thermal gasification of wood and plant waste – renewable natural energy resources in a gas generator with the reverse combustion process and forced steam-air blast, which allows to achieve minimal formation of a by-product – resin. Based on the thermophysical model, the optimal consumption of solid fuel – wood and plant waste and oxidizer – atmospheric air is determined. The work can be used by technical engineers at enterprises in Russia and abroad for the environmentally friendly disposal of wood and plant waste in autonomous energy technology installations with combustion gas generators to generate thermal and electrical energy for the consumer. In particular, large volumes of wood and plant waste accumulate at wood processing and agricultural enterprises in the Tyumen region, which are an additional cheap source of energy.

Sustained Microbial Burden Reduction and Impact on Covid19 Cases in Long-Term Care Facility through Advanced Photocatalysis

Background: COVID19 remains deadly to Americans over 75 years old despite vaccination and additional infection control practices in long term care (LTC). The evolution of more transmissible COVID19 variants and continued viral aerosols result in persistent COVID19 outbreaks in LTC during high community levels of COVID19. Despite the end of pandemic Federal support and the continued vulnerability of elderly to the virus, LTC facilities remain dedicated to protecting this vulnerable population. The study hypothesized that utilization of continuous, facility-wide, advanced photocatalysis (AP) disinfection technology will reduce microbial burden in air and on surfaces, demonstrating a decrease in infectious aerosols and subsequent COVID19 cases among residents and workers. Methods: A prospective facility controlled experimental study was performed in skilled nursing facilities in Pennsylvania and New Jersey from January 2023 to April 2023 to surveil aerobic bacterial and fungal colony forming units (CFUs) in air, and Methicillin-resistant Staphylococcus aureus (MRSA) and fungal CFUs on surfaces and floors prior to and post AP technology installation. Impacts on resident COVID19 cases were recorded and compared to the same extended observation period (February-July 2023) one year prior (2022) with similar year over year community COVID19 rates. In addition, two matched control centers in regional proximity to the intervention facility were also prospectively studied. A one-way analysis of variance (ANOVA) was used to analyze mean microbial burdens after each post activation period (significance p <.05). Results: From baseline to final testing, the intervention facility surface testing showed a 93% reduction in mean aerobic bacterial CFUs (p=.002); 96% reduction in mean fungal CFUs (p<.001); 97% reduction in mean MRSA CFUs (p<.001). Floor testing also showed reductions in mean CFUs for aerobic bacteria by 92% (p<.001); 96% for fungi (p<.001); 99% for MRSA (p<.001). Air testing showed reductions in mean CFUs for aerobic bacteria by 87% (p=.005); 36% for fungal (p=.005). The intervention facility observed a 94% reduction in resident COVID19 cases compared to the matched control facilities that increased 46% during the 2023 time period (Figure 1). Conclusion: This study is on the pioneering edge of demonstrating that continuous and persistent disinfection technology reduces contaminant reservoirs on surfaces, floors, and air and clearly decreases infectious aerosols and improves resident outcomes by dramatically reducing COVID19 transmission in LTC facilities.

IOT-BASED SMART FARMING IMPLEMENTATION TO OPTIMIZE WORK EFFICIENCY OF HYDROPONIC FARMERS PAKISAJI MALANG

Background: Farmers can market their crops due to the significant market share for hydroponic agriculture products. However, this presents a dilemma as the market demands a consistent supply of high-quality crops. Precise nutrient levels and controlled chemical-physics parameters are crucial considerations in hydroponic yields. Thus far, these factors have been managed manually, leading to challenges in achieving desired outcomes. Objective: This community service program aimed to address this issue by developing a real-time automated system for monitoring and controlling chemicalphysics parameters and nutrient levels via an Android application. The goal was to enhance the effectiveness and productivity of hydroponic crop harvests. Method: The program commenced with designing the system based on farmer requirements, followed by the installation and testing of equipment at partner locations. Subsequently, technical training on system features and usage was provided. Results: The system was successfully installed at Grahaponik. According to questionnaire responses, 68.4% of farmers expressed satisfaction, and 78.9% of total participants reported that the system was easy to employ. Technology installation, implementation, and dissemination to local hydroponic farmer groups were conducted. Hydroponic farmers acknowledged the user-friendliness of the devices. Conclusion: Partners' acceptance of the instruments was favorable, facilitating their ease of use and thereby enhancing the effectiveness of hydroponic farming.

Photovoltaic cells with transparency for glass coverage: case study in party space

Sustainable energy and technological development in electricity generation processes offer opportunities for the development and utilization of new photovoltaic technologies in construction. Photovoltaic cells for glazed surfaces, known as double glass or double-skin, have been applied in modern buildings due to their attributed characteristics that can enhance thermal comfort, provide natural lighting for internal areas, ensure privacy in external environments, and reduce energy consumption. The objective of this study is to investigate the viability of using double glass in the glazed roof of a family party venue. The qualitative method, a case study, was employed to assess the demand for electrical energy in the building and the potential use of double glass photovoltaic technologies. Market research was initially conducted with technology suppliers, enabling the evaluation of characteristics for the technological and economic feasibility of the project. The results show that the installation of double glass photovoltaic technology offers 40% transparency to solar radiation through the roof, resulting in thermal and luminous comfort. In terms of economic viability, the study demonstrates the possibility of return on investment in 4.6 years, considering energy generation, reduced building energy costs, and installation expenses. The installation of double glass technology, according to market research, is economically viable and generates local electrical energy for residents, providing comfort in the environment and enhancing the quality of life for occupants.

Exploring the Feasibility of Deploying Technology Enhanced School-Based Teacher Continuous Professional Development in Internet-Limited Environments in Tanzania

In low-income countries, the use of technology to enhance teacher continuous professional development (TCPD) activities has been increasing significantly. However, most technology initiatives related to TCPD require the installation of complex information and communications technology (ICT) infrastructure in schools or availability of reliable Internet connectivity. While installation of ICT infrastructure is costly, the cost of the Internet is unaffordable to most teachers in low-income countries. This study explored the feasibility of deploying Raspberry Pi computers and tablets as micro-servers to facilitate school-based TCPD activities via a learning management system (LMS) without Internet connectivity. Teachers in eight schools in Dar es Salaam and Lindi accessed a TCPD sample module with Raspberry Pi and tablets providing hotspotting and treated as offline local servers hosting a LMS. After the trial, data was collected through focus group discussion, observation, and LMS logs involving 69 teachers. The findings showed that both Raspberry Pi and tablets could be used as micro-servers to provide access to learning resources in offline environments, but Raspberry Pi fared more favorably. Raspberry Pi was easy to set up and connected more devices than did the tablet. However, Raspberry Pi required careful handling as it is a delicate device. Interestingly, there was no significant difference in terms of the performance and cost of the two micro-servers. This study provided further evidence that both Raspberry Pi and tablets could be cost-effective approaches to deliver TCPD activities without installing complex ICT infrastructure or in areas with limited Internet connectivity.

Imperfections for the calculation of steel structures by the finite element method. Part 1

It is well known that imperfections are always present in structural elements. Imperfections can significantly affect the behavior and bearing capacity of steel structures, especially in the case of stability-related tasks. Therefore, inconsistencies must be taken into account in the loadbearing capacity model and their correct application (setting the shape and value) is a key point in the numerical analysis process. In recent decades, much attention has been paid in the domestic scientific space to updating imperfection models for use in numerical models, including taking into account modern more accurate manufacturing and installation technologies for steel structures. The purpose of this study is an analytical review and analysis of scientific research and technical literature, followed by synthesis and elaboration of recommendations on imperfections in relation to the calculation of steel structures using computer modeling technology, including the finite element method. The results of the study contain instructions on how to set the shapes and values of imperfections for different groups of imperfections. The article consists of two parts. The first part is devoted to the study of geometric imperfections, residual stresses and rules for the combination of imperfections, the second part of the article is devoted to equivalent imperfections.

Analysis of the geotechnological potential of heavy oil/bitumen production based on the improved method of well hydraulic production

The work provides an analysis of technologies for the intensification of heavy oil and bitumen production. A variant of its improvement based on the technology of borehole hydraulic production supplemented by the processes of dissolution with hydrocarbon solvents and catalytic aquathermolysis is proposed. The technology involves transfer of main operations of technological chain “extraction-preparation” to the productive layer (transfer of rock to composition of hydraulic mixture; viscosity reduction as a result of heating, dissolution with hydrocarbon solvents, destruction as a result of catalytic aquathermolysis; flotation of oil/bitumen droplets and gravitational separation of the rock). At the same time, in order to increase the efficiency of the technology and use of catalyst, it is proposed to implement the catalytic destruction of asphaltenes starting from mining and continuing after extraction to the surface in a technological installation. Moreover, the required volume of the solvent fraction (taking into account its irreversible losses) is expected to be obtained directly at the deposit as a result of catalytic aquathermolysis and distillation at the final stage of preparation. The improvement will allow to ensure the maximum coefficient of extraction of hydrocarbons with simultaneous modernization to the level suitable for transportation by pipelines without additional preparation.

Study Reviews Multilateral Installation Improvements on the North West Shelf

_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 32910,“A Decade of Multilateral Technology Installation Improvements Down Under,” by Stefano Cappiello and Adam Pasicznyk, SPE, Halliburton. The paper has not been peer reviewed. Copyright 2023 Offshore Technology Conference. _ Multilaterals wells on the North West Shelf of Australia have been installed for over a decade. An overview of the well architecture, technology evolution, reliability, and efficiency of these operations is presented in the complete paper. The study is focused on subsea multilateral campaigns, where multiple global and regional first installations took place in mature fields. Introduction Multilateral developments in Australia mainly have been completed off subsea installations, with fewer performed from jack-up rigs. These multilateral completions mostly have been installed with the junction located in the producing reservoir sands. Technology Advancement of Multilaterals (TAML) Level 5 completions have successfully been deployed. The authors classify related systems as follows, with the most attention paid in the synopsis to the final two classes: - Generation One (Field A) - Generation Two (Field B) - Generation Three (Field C) - Generation Four (Field A) General Multilateral Well Design Because of sand production within the reservoir, these applications typically require a TAML Level 5 completion system. These systems deliver hydraulic and mechanical isolation at the junction through the completion. The junction is isolated above and below by production packers and by swell packers in the lateral. The junctions typically are installed horizontally within the reservoir. The original general requirements to construct Level 5 multilateral junctions included the following: - Ability to construct a Level 5 Junction in the 9⅝-in. casing or liner - Ability to run a landing profile or coupling as part of the 9⅝-in. production casing or liner - Ability to run and orient a premilled window at depth - Drill-out 8½-in. openhole section into the mainbore and into the lateral - Junction installed within the reservoir at high angle - Window milling to be performed in one trip - Lateral completion to be installed in one trip - Compressive strength rating capable of running screen sections over 2 km As the operators began to adopt multilateral technology in Australia, the following requirements were incrementally added: - Ability to deliver a Level 5 multilateral system in an existing well - Ability to deliver a trilateral well - Improve efficiency and reduce installation time

Numerical simulation on the dynamic cold extrusion of bolted single-lap Al/Al joint under interference-fit

The installation process for the dynamic cold extrusion of Al/Al interference-fit bolted joint applied by electromagnetic force was investigated by numerical simulation. The simulation results show that the deformation distribution of the bore wall at joint installed by the electromagnetic force is more uniform than that of the traditional installation technologies. And in the axial direction of bore wall without pin, the maximum stress region occurs at its outlet regardless of the values of interference-fit. Additionally found that the critical interference-fit value for a joint to reach yield strength is about 1 %, and when the amount of interference-fit is less than 1%, the joint mainly exhibits elastic deformation, and when the interference is more than 1 %, the plastic deformation is its main manifestation.

АВТОМАТИЧЕСКАЯ ОБУЧАЮЩАЯ СИСТЕМА КОМПЬЮТЕРНОГО ТРЕНАЖЕРА

One of the effective tools of a computer simulator is considered – an automatic training system (AOS) designed to train operators of technological installations on a simulator in an autonomous mode without the participation of an instructor

Quick installation technology DNA profile – Rapid DNA

The investigation of criminal offenses requires modern, up-to-date, practical means. The ANDE Rapid DNA Identification System is a new technology that generates a DNA ID from forensic samples in less than two hours. In today’s conditions, its use in forensics, practical activities of law enforcement agencies on a permanent basis is very relevant. ANDE technology is specially designed and proven to be robust, mobile and suitable for use in harsh environments.
 The National Police of Ukraine is tasked with the enormous task of identifying victims of horrific crimes related to the ongoing war with russia. Over the past year, it has been proven that a significant percentage of these victims cannot be identified through forensic DNA alone, given her critical condition. The enormous amount of forensic DNA processing work required to address this situation far exceeds the capabilities of traditional DNA laboratory infrastructure. In addition, the logistical overhead associated with managing the efficient storage, movement, tracking, and provenance of large numbers of bodies or even DNA samples across wide geographic areas causes significant wastage of critical resources and long delays. ANDE technology accelerates DNA processing from months or even years to less than two hours. Forensic specialists use mobile DNA laboratories to identify dead. Today, the National Police operates 32 mobile laboratories. Rapid DNA’s secure, field-ready mobile systems provide the most accurate and efficient DNA identification results.
 Thus, the main goal of this study is to provide practical recommendations for forensic support for the use of rapid DNA profiling technology, using Rapid DNA as an example, in pre-trial investigation.
 The stated provisions and practical recommendations in the article are relevant in the context of the use of modern technologies by practical workers.

Технологические особенности изготовления деталей, имеющих резьбовые поверхности, методами 3D-печати для эксплуатации в различных климатических условиях

The influence of 3D-printing modes on the quality of threaded surfaces of printed parts made of ABS and PLA plastic has been studied. Recommendations on the choice of 3D-printing parameters were developed. The technology of installation of threaded inserts for parts operated under various climatic conditions was examined.