Перспективы применения микрорезонаторов Фабри–Перо для тепловизионной техники

The results of study of the developed IR system based on the Fabry–Perot microresonator, functioning on the basis of the thermal-optical effect, are presented for its possible application in thermal imaging technology. The tuning factor of the Fabry–Perot microresonator calculated from the experimental data was kT = 0.44 nm/°С. An array of Fabry–Perot microresonators with pixel resonators in the form of 8 × 8 µm2 squares with a 2 µm gap in the amount of 640 × 480 pieces was made. It is shown that the characteristics of the developed thermal imaging system are not inferior to thermal imaging systems of a comparable class.Представлены результаты исследований разработанной ИК-системы на базе микрорезонатора Фабри– Перо, функционирующей на основе термооптического эффекта, для ее возможного применения в тепловизионной технике. Рассчитанный по экспериментальным данным коэффициент перестройки микрорезонатора Фабри–Перо составил kT  = 0,44 нм/°С. Изготовлена матрица микрорезонаторов Фабри–Перо с резонаторами-пикселями в виде квадратов 8 × 8 мкм2 с зазором 2 мкм в количестве 640 × 480 штук. Показано, что характеристики разработанной системы термовизуализации не уступают тепловизионным системам сопоставимого класса

Photoactive Properties of Transport Sol-Gel Layers Based on Strontium Titanate for Perovskite Solar Cells

In this work, we have investigated the photocurrent and spectral sensitivity of the silicon/SrTiO3:xNb/perovskite structures. The sol–gel method carried out the deposition of undoped SrTiO3 layers as well as niobium-doped (SrTiO3:Nb) layers at atomic concentrations of 3 and 6% Nb. The perovskite layer, CH3NH3PbI3_xClx, has been deposited by the vacuum co-evaporation technique. The layers have been characterized by scanning electron microscopy and X-ray diffraction measurements. The volt–ampere characteristics and spectral sensitivity of the fabricated samples have been measured under illumination with selective wavelengths of 405, 450, 520, 660, 780, 808, 905, 980, and 1064 nm of laser diodes. We have shown that for different configurations of applied voltage between silicon, SrTiO3:xNb, and CH3NH3PbI3_xClx, the structures are photosensitive ones with a variation of photocurrent from microamperes to milliamperes depending on Nb concentration in SrTiO3, and the highest photocurrent and spectral sensitivity values are observed when a SrTiO3:Nb layer with 3 at.% of Nb is used. A possible application of the proposed structure with a SrTiO3:Nb layer for perovskite solar cells and photodetectors is being discussed

Modeling of absorption process using neural networks

© 2019 IOP Publishing Ltd. All rights reserved. An artificial neural multi-layer network has been developed for predicting the mass transfer coefficients in the liquid and gas phases for the gas absorption (CO2) from the air using an absorbent - water. For the development of neural network the unobservable parameters of the packed absorber were calculated. The obtained results can be used to model an extensive class of chemical engineering processes with the possibility of formalizing the calculation procedures

Modeling of absorption process using neural networks

© 2019 IOP Publishing Ltd. All rights reserved. An artificial neural multi-layer network has been developed for predicting the mass transfer coefficients in the liquid and gas phases for the gas absorption (CO2) from the air using an absorbent - water. For the development of neural network the unobservable parameters of the packed absorber were calculated. The obtained results can be used to model an extensive class of chemical engineering processes with the possibility of formalizing the calculation procedures

Effect of air filtration system on gas turbine performance

This paper considers the feasibility of using filtering elements that have uniform filtration potential to replace the regular system of filtration of gas turbine plants for Kazan CHP. The "missed"benefit of the CHP associated with emergency stops due to the destruction of the flowing part of the axial compressor, "under-receiving"profit related to the lack of electricity and power due to the deviation of the technical and economic indicators of the gas turbine plant from nominal values when the flowing part of the axial compressor deviated. An assessment of the impact of unscheduled washing and replacement of the integrated air-cleaning device's filtering element to restore the electrical power of the gas turbine plant has been carried out. A method for evaluating the efficiency of replacing filter elements in the air treatment system for gas turbine installations is proposed. The main dependences and factors affecting the efficiency of the air filtration system in complex air purification devices of gas turbine plants are considered

Influence of the type of filter elements on the efficiency of gas turbine installations

In this paper, we consider the feasibility of optimizing the air treatment system for gas turbine plant by using modern technical solutions for air filtration that have a uniform filtration potential. The analysis of the overlooked benefits of combined heat plant, related to emergency shutdowns due to the destruction of the axial compressor, "lost"profit associated with underperformance development of electric energy and capacity at a deviation of technical and economic parameters of the gas turbine unit from nominal values in the pollution of the axial compressor. An assessment of the impact of unscheduled flushing and replacement of the integrated air purifier's filter elements to restore the gas turbine unit's electric power was carried out. An economic analysis of the optimization of the working environment preparation system for gas turbine plant was performed. The actual payback period of the optimized filtration system was 0.3 months, and the annual costs of the station decreased by 2.5 million rubles

Dependence of gas turbines on the type and state of filtering elements

Following the energy strategy until 2035 of the Russian Federation, obsolete generation facilities are replaced with new promising combined-cycle power units with higher energy efficiency indicators. The difficulties of operating combined-cycle power units, particularly gas turbine units, are primarily related to the working fluid preparation quality. This article discusses the elaborate practice of the air supplied to the compressor, including its cooling and filtration. The paper presents an engineering solution for the technical re-equipment of an integrated air purifier by installing panels for the air's evaporative cooling. The porous structure of the panel material also allows for air filtration. The article presents the dependence of the power of a gas turbine installation on the temperature of the outdoor air in the climatic conditions of the Republic of Tatarstan (Russia). The economic effect of introducing the proposed technology is calculated, which is associated with eliminating lost profits from the under-development of electric energy and the quality of preparation of the working fluid for a gas turbine installation

Improving the efficiency of the water treatment system at the thermal station

The solution of the problems of increasing energy efficiency at the enterprises of the energy industry is largely due to the competent organization of modern methods of water treatment, which are one of the main units in the technological chain in the production of thermal and electrical energy. Improvement of water treatment technology can be considered as one of the directions of implementation of energy-saving measures at energy facilities. An important task is the introduction of energy-efficient methods of water treatment at thermal stations, including the method of desalination of water. There are the methods of water treatment using instant boiling evaporators, which make it possible to obtain desalinated water for steam boilers in this paper. The efficiency of the proposed water treatment system at a thermal station is shown