Науково-дослідна інтерактивна (інструментальна) лабораторія діагностування експлуатаційних матеріалів в енергетиці та транспорті

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https://ela.kpi.ua/handle/123456789/66544

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Перегляд Науково-дослідна інтерактивна (інструментальна) лабораторія діагностування експлуатаційних матеріалів в енергетиці та транспорті за Дата публікації

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    Substantiating the expediency of using hydrogen fuel cells in electricity generation
    (2023) Sergii Boichenko; Oleksandr Danilin; Iryna Shkilniuk; Anna Yakovlieva; Artem Khotian; Maksym Pavlovskyi; Roksolana Lysak; Sergii Shamanskyi; Anatoliy Kryuchkov; Oksana Tarasiuk; Sergii Boichenko
    The object of research is the process of using a hydrogen fuel cell to gene rate and accumulate electricity. The study highlights the feasibility of using a hydrogen fuel cell to provide electrical load. The potential of using hydrogen as an alternative energy source was evaluated. SWOT analysis was used as a research method, based on the results of which recommendations were developed. The proposed measures could be taken to increase the use of hydrogen energy as an alternative to traditional energy sources. The use of hydrogen technologies in an administrative building connected to an existing electrical network was analyzed. The economic and environmental aspects of the use of hydrogen fuel cells to meet the demand for electrical load were investigated. Six schemes of energy supply of the building and comparing them to select the opti mal solution have been developed. In the study, the assessment tool was the Hybrid Optimization of Multiple Energy Resources (HOMER) software. The considered schemes were evaluated in accordance with a single generalized indicator. As a result, it was determined that the use of a hydrogen fuel cell could increase the efficien cy of the traditional system by 85 %. For renewable energy systems, there was an increase in efficiency of 7 % (for the wind generator) and 10 % (for the photocell). The practical use of the results will contribute to the efficiency of the process of electricity production by equalizing the stability of energy supply in hybrid systems. The economic and environmental assessment conducted demonstrates the prospects of using a hydrogen fuel cell. This assessment is designed to strengthen consumer confidence in the use of hydrogen fuel cells and hydrogen in general
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    Monitoring the Risks of Microbiological Contamination of Aviation Fuels and Fuel Systems
    (Springer, 2024) Iryna Shkilniuk; Nataliia Shevchuk
    Hazard identification is a prerequisite for risk management for flight safety. Risks are an integral part of aviation operations. However, their occurrence and potential consequences can be prevented by applying various mitigation strategies designed to contain potential hazards that could lead to unsafe operating conditions. This chapter describes the relationship between microbiological contamination of aviation fuels and their level of purity. Microbiological contamination of aviation fuel and the fuel system is a biological risk in aviation fuel supply. The complex influence of microbiological contamination on the fuel, the fuel system, and flight safety itself have been established. The conditions for the emergence of microorganisms in the fuel medium and system have been carefully analyzed. A microorganism is a specific type of contamination, so it is established that there are conditions that are necessary for the microorganism to develop as a biological object. And there are conditions that indirectly increase the likelihood of microbial contamination in the fuel and fuel system and contribute to its development. These two types of conditions are ordered and ranked to identify the factors that characterize each level of fuel contamination risk. The adverse effects caused by microbiological contamination of fuels and fuel systems can be described in the following categories: problems caused by the physical presence of microbial colonies in the fueling environment; problems caused by microbial metabolism; problems caused by microbial metabolites; problems related to the ability of microorganisms to corrode fuel system operating materials. This chapter presents the design of the monitoring system for risks of microbiological contamination of aviation fuels and fuel systems. It is a generalized algorithm for deciding on the frequency of monitoring of objects (aviation fuel, elements of fuel systems, and refueling complexes) and the selection of prevention methods on the basis of qualitative risk assessment. The algorithm consists of the determination of the monitoring object, selection of monitoring methods, analysis of monitoring results and risk assessment of microbiological contamination spread in fuels and fuel systems, and selection of methods for prevention or control of microbiological phase development.