CONGRATULATIONS
RENEWABLE ENERGY
The new formula that allows to compute the optimal duration of rotation of the solar module. The dependence of optimal con-sumption duration of rotation of the solar module on the magnitude of angular displacement and servo parameters. The increase in the angular displacement increases, the optimal duration of the rotation. Presents a new structural scheme of an automated servo module with the terminal control unit. To rotate the solar module used a servo with a DC motor, worm gear and a sensor of angular position. Plots of power consumption at terminal servo motor control module on the duration of rotation of the module. The optimal duration of rotation of the module corresponds to the minimum energy consumption for the turning process.
Presents the results of experimental researches on the rotation of dual horizontal-axis wind turbine (HAWT). The dependence of the rotation frequency dual HAWT from the axial distance between the geometric centers of the HAWTs and relative angular displacement of the HAWTs is investigated.
In article propose a new type of wind turbines of the big capacity with high energy efficiency achieved through the use of energy streams of wind, not passing directly through the turbine. The design included the modern technologies of transport on the magnetic suspension. The results of physical and numerical modeling are presented.
On the basis of experimental studies determined the performance of horizontal axis three-bladed wind turbines. The dependence of the coefficient of utilization of wind energy from speed factor determined. This characteristic is most important for wind turbines, because it shows the relationship between the two main dimensionless parameters for the wind power plant.
Found the statistical regularity in the chaotic dynamics of the wind direction. Made approximation of the density distribution of the increment of the angle of wind direction by generalization of the logistic distribution. The parameters of the approximating function is computed from the experimental data based on the method of least squares. The proposed consent of the approximating function with meteorological data tested using the goodness-of-fit Pearson and Kolmogorov tests.
The article relates to the field of alternative and renewable energy sources. The problem of increasing the efficiency of ground source heat pump equipped with a horizontal heat exchanger is considered. The problem is solved in the framework of the mathematical model of soil as a semi-infinite body with uniform thermal properties. Time and frequency characteristics of the soil as a dynamic object are defined by the heat differential equation. The analysis of the temperature change in the depth of soil due to the annual cycle average daily ambient temperature is considered. Based on this analysis, the conclusion of a zone existing where the heat exchanger will operate with a maximum temperature difference between the soil at the depth of laying and ambient temperature. The mathematical relations that allow to determine the optimum placement depth of the heat exchanger, depending on the thermal diffusivity of the soil, are obtained. The results can be used for the design of heat exchange circuit with soil source heat pumps with horizontal heat exchangers.
The main indicators of the efficiency of the heat pump were theoretically calculated. The values of soil temperature at which the heat pump operates in the effectively were identified. The ratio of the heat pump experimentally determined. The features of the heat pump control for energy efficiency reviewed.
HYDROGEN ECONOMY
On the basis of the patent research determined the direction of experimental work on a process for producing hydrogen in the “aluminum + aqueous solution of alkali.” The technique of laboratory studies to produce hydrogen in the “aluminum + lye”, experimental studies of hydrogen production mode in the “aluminum + lye” in the laboratory and experimental studies of obtaining stable suspensions of aluminum in water-based thickener agar-agar, as well as experimental studies to verify the circuit flow reactor hydrogen. The analysis of the results of experimental studies on the method of hydrogen production in the “aluminum + aqueous solution of alkali,” considered the possibility of regulating the working process in a flow reactor for producing hydrogen in the “aluminum + aqueous solution of alkali.”
The article deals with the non-equilibrium processes in metal hydride. In March 1989, an article by M. Flejšman and S. Pons claiming that authors have opened cold thermonuke, referring to thermal effects, which they received as a result of experiments on the electrolysis cell. In our print academic opinion was divided and this has continued ever since. Some think that this is a break-through in energy, others were clearly skeptical. Among the latter, doctor of physical and mathematical sciences Smilga V.P., who finished his article in the journal of knowledge is power with the words: “But if the effect is, count on a miracle is not worth it. In the best case scenario is a curious new head from physics of non-equilibrium processes in metal hydride”. The author of this article as a result of the analysis of the literature on extreme behavior, particularly aluminum, and their own experiments and theoretical researches proved short-lived when power redundancy of metal hydrides.
The work presents experimental studies obtaining stable suspensions of aluminum in water-based thickener agar-agar, as well as experimental studies to verify the circuit flow reactor hydrogen. The analysis of the results of experimental studies on the method of hydrogen production in the “aluminum + aqueous solution of alkali,” considered the possibility of regulating the work-ing process in a flow reactor for producing hydrogen in the “aluminum + aqueous solution of alkali.”
Peculiarities of direct hydride α→β transformations evolution near cupola of two-phase region of Pd-H system are experimentally studied. It is shown that they are developed by the classical mechanism of generation and growth. Thus, at low temperatures, the morphology of the transformation products is mixed, i.e. the massive growth of new phase nuclei is replaced by removing the needle-like outgrowths and their further rearrangement. At temperatures which are close to the critical point the transformation develops in the way of a mechanism that does not lead to changes in the polished sample surface.
The article gives a brief overview of some hydrogen elastic and hydrogen plastic effects experimentally recorded in the study of a model system Pd-H with direct observation in situ technique, including a processes videoregistraion. It is shown experimentally registered effects are not only of strictly scientific interest to deepen the knowledge of metals hydrogen interaction fundamental laws. They should be taken into account in the use of specific Me-H technologies and hydrogen processing of materials.
STRUCTURAL MATERIALS
The article presents the results of the study of polymerization processes of industrial adhesives, suitable for the assembly of electro-mechanical devices. According to [1, 2] were chosen for the study 14 samples of adhesives: Epotecny E505, Epotecny P102, Epotecny E207, EPO-TEK H74UNF, EPO-TEK H77S, EPO-TEK 353ND, Resbond 940LE, Resbond 989F, Cerambond 618N, ВК-21, Аnaterm 106, К400, ОС-52, ОС-92. For all samples of adhesives by differential thermal analysis is used to study parameters such as temperature mass loss, the number of stages and the temperature of polymerization, the temperature of the beginning of destruction in a predetermined tem-perature range. Presents the results of comparing the values of temperature of the beginning of destruction of adhesives, as claimed by the manufacturer and obtained experimentally. The paper identified the most important features of the process of polymerization of the adhesive samples. Investigated the rea-sons for the formation of internal stresses during polymerization of the adhesive joints in electro-mechanical devices and develop appropriate measures to reduce these stresses. On the basis of the results of differential thermal analysis of polymerization adhesives proposed effective modes of drying ad-hesives to improve the adhesive joints. An experimental study of the adhesive joints obtained by the proposed mode of drying and recommended by the manufacturer.
This work is devoted to theoretical research of structure materials with submicro size of grain. The mathematical model of internal friction in a porous ultra-fine grained material is suggesting. On this article is considering reshaping the pores by means of the diffusion. There are derived expressions for the speed of intergranular slip, the internal friction in the form of the Debye peak and the relaxation time in this work.
THERMODYNAMIC BASICS OF AEE
This paper studies the efficiency and collaboration algorithms for adaptive control position of a midpoint of the temperature profile, the adaptive control position of the lower points of the temperature profile and adaptive control of the position of the upper point of the temperature profile.
In this paper, alternatively, the underlying method of calculation of the actual and predicted values of specific consumption of conditional fuel (SCCF), considered the possibility of using the methods of mathematical statistics as the basis for creating the prediction algorithm SCCF in CHP plants. The proposed method is based on the construction of statistical mathematical models of calculation of forecast values SCCF in the respective equations of nonlinear multiple regression and allows to solve problems of operational forecast SCCF in real time.
The calculation scheme of creation of approximate solutions of the stationary two-dimensional equation of heat conductivity without internal sources of heat by variation methods for an elliptic pipe of constant thickness is offered. At creation of the equation of heat conductivity in a wall of the elliptic cylinder the curvilinear system of coordinates of a special type considering geometry of section is used. As an example, two examples of the solution of a border task are reviewed under boundary conditions of the first sort in the form of the set functions and in the form of constant values of temperature.
The article describes the most common design of gas turbine units operated in a wide range of performance characteristics and climatic conditions. The advantages and disadvantages schematics of gas-steam units. The description of the new scheme of gas turbine installations in which the working process is carried out in two flow-through units of power gas turbines, partially combined, with separate outputs gases. Steam is generated in the output stream of one flow-through part of the installation and is supplied to the flow path of the other energy gas turbine power plant. Shown that increases the effective efficiency of the plant increases capacity. Thermal scheme of the GPU designed to meet modern environmental requirements. Observed that the question whether the capture is introduced into the combustion chamber water vapor does not have a universal solution and is determined by the specific working conditions of newly built or renovated power station.
This paper shows the reasonableness of redistribution of heat and (or) electric loads from one power equipment to another when that equipment uses different types of fuel. The situation had been reviewed when the fuel cost and (or) the fine sanctions for emissions with combustion products had been changed. Basic examples demonstrate working capacity of calculation algorithm of economically profitable changes in redistribution of heat and electric loads between turbine equipment.
ENVIRONMENTAL ASPECTS OF ENERGY
Researches finely dispersed dust pollution atmospheric air city territories during construction works associated with the autopsy of dispersed soil masses (clay, loam, silty loess soils and artificial). Used the methodology microscopic analysis of particulate dust using computer technology. The principles of zoning city territories by the degree of intensity of a dust dispersed soil masses during construction. Zoning performed by the example of Volgograd, characterized by a predominance in the area of bases and foundations grained soils (70%). Volgograd territory is divided into three types of regions for which developed recommendations and measures to ensure the functioning of the built-up territories with minimal anthropogenic load on atmospheric air of the urban environment.
The article presents the correlation analysis of the mutual influence of the components of the flue gases to the total toxicity of combustion products. Determined the coefficients of pair correlation benz(a)pyrene and oxides of nitrogen, benz(a)pyrene and oxides of carbon, oxides of nitrogen and carbon for energy large capacity boilers. Providing a given mode of operation of the boiler depending on technological factors, the proposed approach is to implement a minimum level of toxic emissions during periods of adverse meteorological conditions for dispersion or disruption to the gas cleaning units. The role of mutual influence of the components of the combustion in the formation of the overall toxicity of emissions of air.
The article is devoted to the assessment of the impact of individual components of the combustion fuel to the total toxicity of the emissions. Defined limits of toxicity of exhaust gases for boilers of low thermal capacity. The analysis of the mutual influence of the components of combustion to increase the accuracy of determining the overall aggressiveness of maximum permissible emissions. The proposed approach allows more detail to assess the formation of a common background level of air pollution urban sprawl toxic substances, in areas where the predominant sources of heat are plants where the low thermal capacity. Forecasting the total toxicity of the emissions caused by the necessity of a critical assessment of the optimization of the combustion mode of a particular plant.
The article is devoted to determination of total toxic emissions from coal-fired boilers. It is shown that when calculating total emissions must be considered private indicators of toxic components of exhaust gases, in particular, benz(a)pyrene and carbon monoxide. The general toxicity of emissions is an indicator of the ecological operation of the unit. For various coal fuel, depending on its operating characteristics of the algorithm determining the level of underburning on carbon monoxide. The possibility of calculating the concentration of carbon monoxide by known concentrations of benz(a)pyrene and in reverse order. The total harmful emissions allows us to estimate the total background level of atmospheric pollution is carcinogenic and toxic substances, especially in areas of large coal-fired power. Knowledge of the concentration of background, in turn, will allow optimization of the boundaries of the sanitary protection zone and to help minimise the impact of carbon clusters in the area.
The analysis of the parameters influencing the rate of formation of benz(a)pyrene combustion of fossil fuels in power plants. Established the functional dependence of the influence of net calorific value of fuel oil at the conditions of generation of benz(a)pyrene in the combustion chamber of the boiler. The methods of calculating the benz(a)pyrene content in the flue gases taking into account the influence of heat applied to the active combustion zone with the fuel, air, gas recirculation and moisture (water or steam) characterizing the mechanism and intensity of the combustion process of fuel oil. The heat of combustion of the fuel determines the mechanism of the process of generation of benz(a)pyrene. The presence of heavy hydrocarbons contributes to greater release of carcinogens and worst environmental conditions of the combustion process. Therefore, for meaningful emissions reductions benz(a)pyrene combustion of heavy fuel oil needed to conduct research on burnout and low-grade alloreactive fuel, especially when using high sulfur content of fuel oils and fuel oils with high content of heavy hydrocarbons.
In this article efficiency of the application of the combined scheme including reagent softening of drains, a group of filters of mechanical cleaning and an installation of the return osmosis for treatment of regeneration drains of TPP for the purpose of reusing them in schemes of water preparation is shown.
ECONOMIC ASPECTS OF AEE
The article considers the problem of processing ash and slag (ZS) from coal burning power plants in commercial products. There is a review of uses ZS, the overview is presented in a condensed form. The main attention is paid to the organization processing industry ZS abroad and in Russia. It is shown that processing ZS – promising business direction, which can be a source of investments for technical re-equipment of thermal power plants; financial source of coverage of environmental charges; to increase the profitability of multi-stage products of this example and of electricity and heat. It is noted that Russia needs a national coordinating structure designed to solve effectively turning this example into marketable products. Domestic and international experience show that the most acceptable is the system of dry fly ash of selection.
The possibility of developing ecoenergy regional and interregional projects on the basis of domestic conversion development. Technological schemes ecoenergy system, which laid the basis for a fundamentally new type of high-speed high-temperature combustion. Created technological advance allows you to create mobile systems road, water, rail and air bases. The combination of fixed sites and mobile systems to optimize the solution of the object, municipal, regional and interregional ecoenergy problems. Formation of a complex project is carried out on the basis of integration, where each of the participants decides to first own the most acute problem. Volgograd region pose problems that can be solved through regional ecoenergy the project and the results of testing of industrial development in other regions.
The problem of development of renewables in Russia is considered. State programs on development and use of RES in the Russian Federation are presented.
INNOVATIONSOLUTIONS, TECHNOLOGIES , FACILITIES AND THEIR INNOVATION
Describes the main approaches to the creation control systems complexes of alternative energy sources. The paper describes the algorithm control with prediction of condition. The features of this algorithm is to predict condition the objects of the complex, dynamic optimization of the equipment and heat analysis needs of the consumer. The results of numerical simulation of the algorithm, and its comparison with the cascade algorithm.
PROBLEMS OF OIL - AND - GAS COMPLEX
The paper explores the possibility of using petroleum coke as fuel for heat engines and power plants. This problem is solved on the basis of experience gained in the creation and use of coal-water fuels (CWF). In the present work proposes to use a fuel composition based on the gelled aqueous suspension of petcoke. Experimentally studied the technology of producing gelled aqueous suspension of petcoke. Results of experiments using the developed technology based thickener agar-agar. From the analysis of the results obtained by the proposed technology, it follows that the resulting fuel composition based on the gelled aqueous slurry of petroleum coke was fireproof and its production is possible on a modernized equipment for coal-water fuels.