• MECHANIZATION IN AGRICULTURE

    Evaluation of effects of biofuels blends on performance and emissions of diesel engine

    Mechanization in agriculture & Conserving of the resources, Vol. 67 (2021), Issue 2, pg(s) 57-60

    Growth of the economy and living standards of the population increase the need of people’s and goods transportation by sea, railroads, the air, and highways. As a result, increases the need to use more ships, trains, airplanes, heavy-duty trucks, self-powered machines, city busses, and light-duty passenger cars. Unavoidably increases the demand of the fuel to be consumed, however the natural oil – resources are largely exhausted over hundreds of years. Moreover, the increased consumption of a fossil-origin fuel creates the urgent environment pollution problems and climate change. The automotive air-pollution problem emerged already aim of this article was to
    investigate the influence of three-component fuel on the efficiency and emission performance of a diesel engine. The results obtained during the research are presented, which are investigated with a single-cylinder diesel engine “ORUVA F1L511”. The study examines diesel fuel and fuel blends J5Bu5, J5Bu10 and J5Bu15. The results obtained in the study are comparable. Engine load characteristics were recorded at n = 2000 rpm. The study found that the lowest carbon monoxide (CO) emissions (163ppm) were obtained by using J5Bu5 fuel blend. Maximum nitrogen oxide (NOx) emissions were obtained with the engine running on diesel fuel (1839ppm). The lowest NOx emission was obtained with the engine running on a three-component J5Bu15 fuel blend (1643ppm). The highest opacity was obtained when the engine was fuelled with 100% diesel fuel and at full load.

  • DOMINANT TECHNOLOGIES IN “INDUSTRY 4.0”

    Increasing the Reliability and Productivity of a Tubular Furniture Packaging Operation

    Industry 4.0, Vol. 5 (2020), Issue 4, pg(s) 167-169

    This paper discusses the programming and control of a multi-cycle tape machine. Part of the electrical equipment is also presented. The program code in the language “Lader diagram” is selected and the input-output diagram is described. “Lader diagram” is a programming language designed to resemble an electrical circuit. Due to this fact, it has a great advantage over other programming languages, because electrical logic is easy and simple to present. Most of the programs in discrete automation are created on the “Lader Diagram” due to the simple operation and easy maintenance. The description and the cyclical approach of each executive body and automatic mode of operation are presented.

  • TECHNOLOGICAL BASIS OF “INDUSTRY 4.0”

    Impact of Industry 4.0 on agricultural industry

    Industry 4.0, Vol. 5 (2020), Issue 4, pg(s) 164-166

    Industry 4.0 represents the newest generation of industry development. Every day the various demands in industry are getting more and more demanding. The demand for shorter production and delivery time, more efficient and automated processes has led us to the Industry 4.0. It is necessary to include and integrate the latest developments based on digital technologies as well as the interoperability process across them. The goals is to enable companies to transmit information in real time in terms of performance and behaviour. Industry 4.0 can be applied to any branch of industry. Agricultural industry is no exception. As far as agricultural machinery is concerned, it is a very important part of agricultural industry. Agricultural machinery incorporates electronic controls and it is a part of digital age, enhancing their current performance. In addition to the electronics, using sensors and drones, supports the data collection of several agriculture key aspects, such as weather, animals and crops behaviour, geographical spatialization, etc. The main tasks are how to apply the right methods and methodologies in order to support a better supply chain decision-making process, how to automate the process and how can Industry 4.0 help a person, who is in agricultural industry, in order to make effective decisions based on objective data.

  • Evaluation of robustness in ASR for different ‘front-end’ methods

    Mathematical Modeling, Vol. 2 (2018), Issue 4, pg(s) 147-148

    Some feature extraction methods suffer performance degradation in different environments. So it has become a necessity to search for new methods that perform better in different types of conditions. Therefore we can make a comparison of the new found methods to evaluate their performance and to determine which is best in multi-condition tests in order to have e more robust ASR system.

  • BUSINESS

    INFLUENCE OF THE WORKING ENVIRONMENT ON SAFETY AND HEALTH PROTECTION AT WORK AND PERFORMANCE OF THE EMPLOYEES IN AN OFFICE SPACE

    Science. Business. Society., Vol. 3 (2018), Issue 3, pg(s) 115-121

    Currently, most employers ignore the fact that colors affect the behavior and thinking of employees in the work process. Workers are austere, colors, and they are places where employees only routinely perform tasks. In such an environment, employees can not feel good, do the best they can and work safely. It is important for employers to realize that by creating suitable working conditions they will help their employees to better manage their job tasks. Their performance will improve, they will work safely and significantly help in the development of society. The article deals with experiments that deal with the performance of test people who perform specific activities with different color backgrounds. This section evaluates the measured values and determines which colors affect the lowest performance, which colors are disturbing and cause many mistakes, human workplace problems, which can lead to arguments or even aggression. But also which colors can help achieve the highest efficiency that positively affect staff performance, support thinking and develop creativity, improve relationships and create a comfortable atmosphere.

  • TECHNOLOGIES

    THE EXPERIMENTAL DETERMINATION OF L/D RATIO USING WATER IN MINI CHANNELS TO ANALYSIS OF FLUID TEMPERATURE PERFORMANCE WITH NANO PARTICULATES

    Machines. Technologies. Materials., Vol. 11 (2017), Issue 7, pg(s) 353-355

    Nano fluids is advantageous with high thermodynamic properties compared to pure fluids. In the last half century, rapid developments in production technology, which allows high-precision production of the micro heat exchangers and the use of the micro heat exchangers in different areas. These developments point researchers to enhance new methods in improving the heat transfer. One of these methods is; to improve fluid’s heat transfer by adding different particulates to the fluid. The nano fluids are the new type of heat transfer fluids that are made by adding nano particulates which has high thermal conductivity to a conventional fluid. Since the solid metal has a higher thermal conductivity than the basis fluid, the addition of the metallic particulates to the fluid increases the heat transfer of the mixture. In this study, for analyzing the temperature performance of fluids with Nano particulates; an experimental study was performed using water to determine the optimum mini channel length and mini channel diameter. Performance parameters are; channel length, tube mini channel diameter, the flow and the inlet temperature. According to the experimental results, the maximum temperature performance of the mini channel was found to be at L/D=250/3 (at Selcuk University condition). Therefore, with these results, the optimum mini channel length and mini channel diameter are determined for the high efficiency that is to be achieved by using nano fluids

  • TECHNOLOGIES

    STANDARDIZATION AS A TOOL FOR PROCESS IMPROVEMENT

    Machines. Technologies. Materials., Vol. 11 (2017), Issue 3, pg(s) 110-113

    In this article the authors examine the nature of standardized work and its place in TPS (Toyota production system). Standardized work is one of the most powerful but least used lean tools. By documenting the current best practice, standardized work forms the baseline for kaizen or continuous improvement. As the standard is improved, the new standard becomes the baseline for further improvements, and so on. Improving standardized work is a never-ending process. Establishing standardized work relies on collecting and recording data on a few forms. These forms are used by engineers and front-line supervisors to design the process and by operators to make improvements in their own jobs. In this workshop, you’ll learn how to use these forms and why it will be difficult to make your lean implementations "stick" without standardized work. The benefits of standardized work include documentation of the current process for all shifts, reductions in variability, easier training of new operators, reductions in injuries and strain, and a baseline for improvement activities. The main emphasis placed on identifying the three elements of standardized work, monitoring of any process to detect potential improvements and milestones in process improvement. Based on research conducted in Bulgarian industrial enterprises are given the attitudes of managers to use this tool to improve processes.

  • SIMULATION ON SINGLE CYLINDER DIESEL ENGINE AND EFFECT OF COMPRESSION RATIO AND EGR ON ENGINE PERFORMANCE AND EMISSION

    Machines. Technologies. Materials., Vol. 9 (2015), Issue 2, pg(s) 24-26

    In this research, the one dimensional (1D) CFD modelling of four-stroke direct injection diesel engine is developed by AVL Boost software. The performance of a diesel engine increases with increase in compression ratio. Variable compression technologies in IC engines are used to increase fuel efficiency under variable loads. Exhaust gas recirculation is a common way to control in-cylinder NOx production and is used in most modern high speed direct injection diesel engines. However the effect of EGR on performance, combustion and emissions production at different compression ratios are difficult to depict. In the present work an attempt was made to study the effects of exhaust gas recirculation on performance, combustion and emissions of a variable compression Diesel Engine. The test was conducted at different compression ratios with different loads and for different EGR rates.

  • SIMULATION ON SINGLE CYLINDER DIESEL ENGINE AND EFFECT OF COMPRESSION RATIO AND EGR ON ENGINE PERFORMANCE AND EMISSION

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 8, pg(s) 11-13

    In this research, the one dimensional (1D) CFD modelling of four-stroke direct injection diesel engine is developed by AVL Boost software. The performance of a diesel engine increases with increase in compression ratio. Variable compression technologies in IC engines are used to increase fuel efficiency under variable loads. Exhaust gas recirculation is a common way to control in-cylinder NOx production and is used in most modern high speed direct injection diesel engines. However the effect of EGR on performance, combustion and emissions production at different compression ratios are difficult to depict. In the present work an attempt was made to study the effects of exhaust gas recirculation on performance, combustion and emissions of a variable compression Diesel Engine. The test was conducted at different compression ratios with different loads and for different EGR rates.

  • Simulation on single cylinder diesel engine and estimation of engine performance using AVL Boost software

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 7, pg(s) 33-35

    The simulation and computational development of modelling for the research is use the commercial Computational Fluid Dynamics (CFD) of AVL Boost software. In this research, the one dimensional (1D) CFD modelling of four-stroke direct injection diesel engine is developed. The analysis of the model is fluid flow and combustion performance process in the engine cylinder. In this model it can to know the diesel engine performance effect with simulation and modelling in any speed (rpm) parameters before to do the physically development, so it can do the new engine design components with the economic material and time. The model simulation covers the full engine cycle consisting of intake, compression, power and exhaust. The simulation result highlighted energetically and economic performance of the engine.

  • SOCIETY & ”INDUSTRY 4.0”

    COMPETENCY PROFILE OF THE INNOVATIVE ENTERPRISES

    Industry 4.0, Vol. 2 (2017), Issue 3, pg(s) 135-138

    Innovative enterprises have a key role in the recognition and the sustainable development of the knowledge-based economy. The different innovative enterprises have different contribution and value for the economy and the social development. The R&D personnel and its acquired and developed competencies are basic characteristics of the innovative firms. On the base of the R&D personnel’s competencies a company competency profile is designed. This model may improve the innovation activity and the organizational performance of the enterprise. It can be used for making differentiation between innovative enterprises and on is base to be delivered conclusions on their competency competiveness. The competency profile can be useful for choosing what kind of innovations to be produced and in what innovate projects the company may participate. These innovative projects need concrete and specific competency tools. The competency profile works within a framework for improvement of the whole competency management of the innovative enterprise and introducing the best performance management practices for the R&D personnel.