Наукові матеріали співробітників кафедри екології (монографії, глави монографій)

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Browsing Наукові матеріали співробітників кафедри екології (монографії, глави монографій) by Author "Lejda, Kazimierz"

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    Comparative characteristics of low-temperature properties of jet fuels modified with bio-additives
    (IOP Conf. Series: Materials Science and Engineering 421, 032003, 2018, 2018) Boichenko, Sergii; Lejda, Kazimierz; Yakovlieva, Anna; Vovk, Oksana
    The work is devoted to the investigation of low-temperature properties of alternative jet fuels mixed with bio-additives derived from rapeseed oil, methanol and ethanol. For this work, a modification of conventional jet fuel from rapeseed oil, methanol and ethanol was chosen to develop alternative jet fuels. The main low-temperature characteristics – freezing point and pour point of conventional jet fuel and three types of bio-additives were identified and compared with the requirements for conventional Jet A-1 fuel. The influence of bio-additives from rapeseed oil, methanol and ethanol on low-temperature characteristics of new jet fuels has been studied and explained. The necessity of studying new technologies is grounded.
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    Modification of jet fuels composition with renewable bio-additives
    (National aviation university, 2019) Yakovlieva, Anna; Boichenko, Sergii; Lejda, Kazimierz; Vovk, Oksana
    The study is devoted to developing of alternative jet fuel by means of blending conventional jet fuel with plant-derived bio-additives and studying properties of new alternative jet fuels. The review and systematization of the variety and classification of jet fuels used all over the world was done. The technologies of jet fuels production from various non-renewable energy sources are discussed. Factors, which stipulate development and implementation of alternative jet fuels were shown: limitation of crude-oil deposits, decreasing of its energy efficiency, global warming that is intensified by processes of extraction, processing and use of fuels and exhaust gases that negatively affect atmosphere. Perspective technologies and feedstock for alternative jet fuels production were analyzed, as well as advantages and disadvantages of each of them. Fundamentals of jet engine operation and exploitation are considered within this study. It was discussed how jet fuels quality and composition may affect the life span, reliability and durability of jet engines. The method for bio-additives production from rapeseed oil and camelina oil fatty acids esters was developed. High quality bio-additives based on FAME and FAEE of rapeseed and camelina oil were used for blending with conventional jet fuels. In the result of experimental studies the comparative characteristics of physical-chemical and exploitation properties of new alternative jet was developed. The properties of new jet fuels were considered for satisfying requirements of standards for fuels of grade Jet A-1. It was shown that maximal content of bio-additives in blended jet fuels is 30 %. In the result of bench tests it was concluded that operational parameters of the jet engine powered with new blended jet fuels completely satisfy exploitation norms, which are set in specification for tested jet engine, may be used as a working body of the jet engine and do not require its design changes. In the result of emissions evaluation it was concluded that blending conventional jet fuels with bio-additives allows improving its environmental properties: decreasing amounts of CO2, H2O, SO2 and NOx emissions in jet engine exhaust gases. The results of the study will contribute to reducing the energy dependence of air transport, improve its environmental friendliness and will promote improvement of the sustainability and safety of modern civil aviation.
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    Selected aspects of providing the chemmotological reliability of the engineering
    (National Aviation University, 2019) Boichenko, Sergii; Aksionov, Olexander; Topilnytskyi, Petro; Pushak, Andrii; Lejda, Kazimierz
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    Оливи. Моторні, турбінні, гідравлічні та трансмісійні: властивості та якість
    (Національний авіаційний університет, 2019) Бойченко, Сергій; Boichenko, Sergii; Пушак, Андрій; Pushak, Andrii; Топільницький, Петро; Topilnytskyi, Petro; Любінін, Йосип; Lyubinin, Joseph; Лейда, Казимир; Lejda, Kazimierz
    Містить основні теоретичні відомості про оливи (моторні, турбінні, гідравлічні, трансмісійні). Привячений основним фізико-хімічним і експлуата-ційним властивостям моторних, турбінних, гідравлічних і трансмісійних олив, основним технологічним процесам їх продукування, технічним вимогам до їх якості та системі контролю якості. Особливим кластером матеріалу підручнику став розділ про системи змащування авіаційних двигунів, оливи для авіаційних двигунів, а також розділ про виореклений альтернативний вид олив – біологічні оливи. Призначено для студентів, які навчаються за спеціальностями, що передбачають вивчення дисциплін, повязаних із використанням олив під час експлуатації техніки. Підручник буде корисним для фахівців транспортної сфери, а також нафтопродуктозабезпечення, аспірантів і здобувачів наукового ступеня відповідного профілю.