Electrochemical systems with solid polymer electrolyte are considered to be the most promising for hydrogen energy and several branches of industry. Electrocatalysts are one of the key components of fuel cells and electrolyzers. Application of magnetron sputtering for their synthesis will allow replacing the multistage chemical methods, to decrease platinum loading and create new effective nanostructured electrocatalysts. This review presents the systematization of the available data on magnetron sputtering for electrocatalysts and protective coating synthesis. Moreover the review analyzes the influence of sputtering parameters on deposited films properties and proposes several strategies of optimization. There is special attention to nanocarbon support materials (graphene, carbon nanotubes).

The most effective mechanism of fuel economy for autonomous northern regions is the usage of renewable energy in complex systems with medium and high penetration level. Moreover, the construction of wind-diesel power plant (WDPP) is the most expedient for the northern territories with the high wind potential. To choice equipment configuration, the methodology in the form of multi-level sequence, applying the analysis hierarchy process (AHP) on the last level, is used. According to the sequence, the parameters of all possible variants of WDPP equipment configuration are calculated. Introducing the boundary conditions, several options with values that satisfy conditions are allocated from the total number of variations. From this set, adapting AHP to wind energy, the best option is selected. This embodiment is the one that has the highest priority value. For example, the draft WDPP in the village Amderma is reviewed. Over a hundred options have been considered then six of them were selected, satisfying the boundary conditions. For the final choice AHP is used.

The article discusses the prospect of using wind turbines to supply power to a relatively small and dispersed facilities located in areas with low load density remote from major electricity networks, oil and gas pipelines. In rural areas, where wind and water are essentially one of the cheapest sources of clean energy, there are broad prospects for the electrification of remote farms, rangeland, and infrastructures for communication systems. Then the article considers a method of accelerating the low-potential flows of external environment on the example of wind flow and identifies that the research on the application of different designs of flow boosters is important in order to increase the efficiency of wind power plants in relation to areas of low wind activity. The article presents the description of the experiment on the test stand designed to simulate the operation of wind installation. The test bed is a disc that let air flow through the slits with varying sizes.  One of the objectives of the research is the creation of the wind installation design with axial aerodynamic wind flow accelerator. The article presents computer and physical models of wind installation. The use of the proposed wind installation will increase energy production both in daily and annual period.

The paper deals with the synergetic of semiconductors with deep impurities and defects. The work is based on previously developed theoretical concepts of the self-organization processes in n-type semiconductors A^IIIB^V under uniform heating. The decay arising at the growing the complexes of shallow donor + vacancy causes appearance of periodic distribution of vacancies’ concentration and that of small donors along the sample, that leads to the appearance of potential barriers isotype n-n⁺, i.e. appearance of internal electric fields. Separation of heat generated free carriers on these potential barriers causes the appearance of currents and voltages, synergistic in nature. The paper demonstrates the research results of the A^IIIB^V type semiconductors grown up by Chohralsky method and had n-type of conductivity: GaAs<Sn>, GaAs<Te>, InP<Te>, GaSb<Te>. Research of the structures with simple ohmic contact manufactured from these semiconductors shows that they have some rather unusual properties: at uniform heating   in   them   temperature-depended   currents   and  voltages   appear,  that  is  the  sample  of   A^IIIB^V   type   n-semiconductors at Т > 50÷60 ºС works as generator of current and (or) generator of voltage. Such unusual properties are explained by decay of complexes of type shallow donor + vacancy under influence of temperature. As a result at self-organization processes periodical distribution of vacancies and those of effective working donors and recombination centers appear that cause appearance in the samples synergetic currents and voltages. This work can be useful at manufacturing devices based on A^IIIB^V semiconductors.

The paper studies the concentration dependence of the lattice parameters of the TiN_xH_0.20 interstitial solid solution (x = 0.12 – 0.50) and establishes the nonlinear concentration dependence of the parameters of basic hexagonal lattice in the investigated area of nitrogen concentrations. This one bends in two places and consists of three parts that testifies to change of the character of interatomic interaction force. The paper detects the correlation between the concentration dependence of the lattice parameters of the solid solution and phase transformations taking place in low-temperature annealing. 

The paper researches the process of heat and mass transfer in furnaces of the resistance in the silicon carbide production and considers a solid body with gas cavities and internal heat in general physical model of the process. Solid part is multicomponent and moist.  The thermal conductivity with variable thermal parameters, variable porosity, the heat of chemical reactions, the process of drying the solid component, the generation of gas in chemical reactions and heat transfer seepage gas flow are taking into account. The mathematical description of the process is a system of two differential equations: the heat equation for a porous body with a chemically reactive components and heat transfer equation in the process of filtering the gas through the interconnected pores. Differential equations are supplemented by the necessary closing relations. Closing relations are the results of the considering of the processes model accompanying the silicon carbide production: the drying, calculating the pressure field in the system of interconnected pores, heat of chemical reactions and the effective thermal conductivity. The obtained mathematical model allows determining the temperature field, choosing variants of loading the furnace and regimes of melting in the silicon carbide production.

The paper suggests the perspective ways of reduction emissions of dangerous pollutions on the gas stations. It compares the pollutant concentration values obtained by in environmental measurements and the modeling of dispersion of emissions from the gas stations located on the city territory. This paper concludes that there is the advisability to account of technology fuel filling process in tanks for the regulations of the sanitary protection zone size of gas station. Moreover it concludes that the calculations of heavy hydrocarbon vapor dispersion in the atmosphere for various physical parameters of the emissions source (gas station) are necessary. Therefore the installation of vapor trapping of heavy hydrocarbons to the gas station is necessary as well.

The article describes the major environmental problems of rocket-space systems exploitation in the course of ground and flight testing, identifies the main influencing factors that affect the environment in the area of testing and launch facilities. Moreover the article suggests the ways of improving the ecological situation in the launch vehicles operation and ways to reduce the likelihood of accidental outcome of tests emergency situations; as well as evaluation of the dispersion of considered dangerous fragments, substances such as maximum permissible concentration of toxic emissions in the areas of exhaust stages falling of launch vehicles, which should lead to a reduction in mechanical and chemical pollution of the environment in the space-rocket systems operation.

The article is a review of the known methods of mineralized water desalination and the analysis of their energy efficiency. Furthermore, this article proposes two schemes of the energy-efficient desalination plants using the heat pump, and considers equipment parameters and composition plants during their operation. There is an example of specific temperature conditions of the plants and calculation of heat flow balance. Moreover the article evaluates and compares the effectiveness of the proposed facilities for theoretical and practical methods; discusses the temperature operation plant control and its elements, there are the graphs of energy indicators as well. The article concludes that the application of these plants is effective, including on the alternative energy sources.