This paper considers the issue related to the use of jet gas turbine engines for the generation of thermal and electrical energy, defined as a hybrid energy system powered by biogas. Revealing the main vulnerable points of the use and operation of these systems, it is proposed to use biogas obtained from agricultural, crop and livestock waste as fuel for gas turbine engines. Analyzing the work of gas turbine engines, it reveals not only the technological advantages of using biogas instead of fuel, but also reducing the cost of heat and electric energy obtained by obtaining a productive land biohumus. This will result, firstly, it is especially emphasized, the usefulness of the resulting ground humus as a waste material, when producing biogas as fuel, for the operation of a hybrid energy system operating on the basis of gas turbine engines. Secondly, during the operation of a hybrid power system, it is possible to simultaneously obtain thermal and electrical energy. Thirdly, the low cost of the heat and electric energy received. The following are other useful applications of such a power system. The resulting thermal energy is used for heating the greenhouse, and the electrical energy obtained from the operation of the hybrid power system can be used not only for lighting the premises, but can be used for the needs of the greenhouse. It is shown that the proposed hybrid power system consists of two technological structures. The first design is to obtain fuel in the form of biogas for the operation of gas turbine engines, the second design is the connection of the first design with gas turbine engines. A schematic diagram of the general design of the proposed hybrid power system and the principle of its operation is proposed. The difficulties encountered in the design and operation of such hybrid power systems are noted

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The aim of this work is to study the properties of nanostructured (1 − x)ZrO2 − xCeO2 composite ceramics, depending on the content of oxide components, as well as to establish the relationship between the phase composition of ceramics and strength properties. The choice of (1− x)ZrO2 − xCeO2 composite ceramics as objects of study is due to the great prospects for using them as the basis for inert matrix materials for nuclear dispersed fuel, which can replace traditional uranium fuel in high-temperature nuclear reactors. Using X-ray diffraction, it was found that the variation of the oxide components leads to phase transformations of the Monoclinic-ZrO2 → Monoclinic − Zr0.98Ce0.02O2/Tetragonal − ZrO2 → Tetragonal − Zr0.85Ce0.15O2 → Tetragonal − ZrCeO4/Ce0.1Zr0.9O2 type. As a result of mechanical tests, it was found that the formation of tetragonal phases in the structure of ceramics leads to strengthening of ceramics and an increase in crack resistance, which is due not only to an increase in the crystallinity degree, but also to the effect of dislocation hardening associated with a decrease in grain size. It has been established that a change in the phase composition due to phase transformations and displacement of the ZrO2 phase from the ceramic structure with its transformation into the phase of partial replacement of Zr0.85Ce0.15O2 or Ce0.1Zr0.9O2 leads to the strengthening of ceramics by more than 3.5–4 times. The results of resistance to crack formation under single compression showed that the formation of the ZrCeO4 phase in the structure of ceramics leads to an increase in the resistance of ceramics to cracking by more than 2.5 times.

The paper considers the hydrogenation processes in Li2TiO3 ceramics under irradiation with protons with an energy of 500 keV and fluences of 1 × 1010–5 × 1017 ion/cm2. The choice of the type of irradiation, as well as the irradiation fluences, is based on the possibilities of modeling hydrogenation processes and studying the kinetics of structural changes caused by the accumulation of radiation damage. The choice of Li2TiO3 ceramics as objects of research is due to their prospects for using as blanket materials of thermonuclear reactors for the tritium production and accumulation. It was found that the formation of point defects and their subsequent evolution associated with the formation of complex compounds and the filling of pores, followed by the formation of gas-filled bubbles, the presence of which leads to a decrease in crack resistance and resistance to destruction of the near-surface layer. Based on the data on structural changes and evolution of the crystal lattice parameters, its swelling, a description of the destruction processes associated with hydrogenation in Li2TiO3 ceramics was proposed. Also, during the studies, it was found that at irradiation fluences above 1 × 1017 ion/cm2, the appearance of impurity inclusions characteristic of the TiO2 phase was observed, the presence of which indicates the crystal lattice destruction processes because of accumulation of radiation damage and deformations caused by them. Critical doses are established at which there is a sharp deterioration in strength and crack resistance, reflecting the resistance of ceramics to mechanical external influences.