Sirvi Autor "Ilves, Risto (advisor)" järgi
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Kirje Liquid fuels air-fuel mixture processing system with spark ignition engine for use in generators in a crisis situation(Estonian University of Life Sciences, 2023) Raide, Veljo; Olt, Jüri (advisor); Ilves, Risto (advisor); Institute of Forestry and Engineering; Horák, Vladimír (opponent); Gailis, Maris (opponent)In times of crisis and war, there is a high probability that the operation of electrical networks will be disrupted, and therefore some distribution networks may remain without electricity. As a result, important information- and communication technology nodes of the core networks of the country's critical infrastructure are also without electricity. In a crisis situation, the missing electrical energy can be produced with widespread spark ignition engine-generators, but in their case, flexibility in the use of fuels is important. In a crisis situation, all possible engine fuels, both light and heavy, must be used. The problem with the use of engine-generators for the production of electricity is their single-fuel nature. By heating the fuel mixture, better evaporation is achieved and thus it is possible to bypass the problem and use all liquid fuels intended for internal combustion engines to produce electricity in a spark-ignition engine-generator. The dissertation is based on six articles. The research paper described the effects of EU and NATO legislative acts on the liquid fuels used in Estonia, analyzed solutions for solving problems related to energy security in Estonia, analyzed the bottlenecks in the use of diesel and biodiesel fuels in compression ignition engines, developed a technical solution for a air-fuel mixture processing system made from different fuels, and improved the solution so that it is suitable for use with spark ignition engine and engine experiments were performed. The aim of the work was to develop a air-fuel mixture processing system made of different liquid fuels for a spark-ignition engine, and its suitability in practice was assessed. The aim of the system is to adapt the air-fuel mixture for use in a spark-ignition engine in order to ensure the production of distributed electricity in times of crisis and war to support the country's critical infrastructure. The conducted research and the developed solution contribute to the production of distributed electricity with spark ignition engine-generator in a crisis or war situation, using currently available liquid fuel to supply the country's information systems with electricity until NATO Article 5 is triggered, if necessary.