HEAT AND POWER ENGINEERING FUNDAMENTALS
EXPERIMENTAL STUDY OF THE IMPACT OF THE TEMPERATURE FIELD INHOMOGENEITY ON METROLOGICAL PERFORMANCES OF THE ULTRASONIC FLOWMETER // Transactions of Academenergo. 2017. N 2. P. 7-18.
A.A. Borisov*, E.M Gershman**, D.S. Pruglo***, A.V. Fafurin****, V.B.Yavkin*****
* STP Ltd, ** Centre “Metrology”, “SIBUR” Ltd, *** Department of metrology, automation, connection and IT, «Gasprom oil New Port » Ltd, **** FSUE Russian research institute of the flowmeter survey, ***** Kazan National Research Technical University – Kazan Aviation Institute (KAI)
Keywords: ultrasonic flowmeter, temperature field inhomogeneity, auxiliary uncertainty, flow rate.
The influence of non-isothermal flow of water on the metrological characteristics of the ultrasonic flowmeter was studied. Nonisothermic flow created by injecting a small amount of heated water in the vicinity of the test flowmeter. Experiments have shown that the presence of the temperature field inhomogeneity leads to an additional uncertainty volume flow rate, which depends on the temperature difference and the ratio of injected preheated flow to main stream. Injecting preheated stream leads to low-frequency fluctuations in the readings of the ultrasonic flowmeter, which are caused by fluctuations of the temperature profile.
THE CALCULATION OF THE SEPARATION OF ELECTRON FROM ATOMIC-ION TEMPERATURE WITHIN A TWO-TEMPERATURE ARC CHANNEL MODEL// Transactions of Academenergo. 2017. N 2. P. 19-24.
A.V. Gerasimov, A.P. Kirpichnikov, F.R. Sabirova
Kazan national research technology university
Keywords: The arc discharge, electronic temperature, gas temperature, break temperatures, channel model.
In this paper we consider fundamental, and one of the most interesting questions that arise in the theory and practice of two-temperature arc matter of breaking Te(R) and atomic-ion (gas) T(R) temperatures on the border of the electric arc. For the two-temperature calculations used channel model arc. Presented gap value calculated for different values of the current strength in the discharge. Calculations were made for an argon plasma at atmospheric pressure for two values of current intensity I = 78 A, and I = 200 A and various values of the wall temperature. Also shows the corresponding experimental results for the same conditions of other authors, we are in good qualitative agreement of the results of calculations with experimental data.
pressure gradient in diverging and converging channels with forced flow pulsations // Transactions of Academenergo. 2017. N 2. P. 25-33.
Kazan Scientific Centre of the Russian Academy of Sciences
Keywords: pressure gradient, diverging channel, converging channel, flow pulsations, frequency, amplitude, wave structure.
Features of flows in diverging and converging channels in conditions of forced flow velocity (pressure) pulsations have been considered. The combined effect of pressure gradient due to channel geometry and forced flow pulsations on the flow pattern is proposed to be examined depending on the ratio of these factors. Analytical assessment of flow regime parameters that lead to one or another mechanism of flow structure formation has been performed.
ALGORITHM OF 3D MODELING PROCESS OF MIXING FLUIDS IN TUBULAR CHANNELS // Transactions of Academenergo. 2017. N 2. P. 34-47.
Kazan national research technological University (FGBOU VO “KNRTU”)
Keyword: turbulent motion, small-sized tubular apparatus, processes mixing of liquids in a cylindrical channel, the confuser-diffuser channel, structural and control parameters.
The article considers the main principles of small-sized tubular turbulent apparatuses for mixing liquids in the chemical industry. Discusses the design and control (sensitive) parameters during operation of the apparatus. Studied 2D numerical model of the hydrodynamic processes used during the mixing of liquids in a tubular cylindrical channels and the confuser-diffuser type in a mixing apparatus. Illustrates and justifies the shortcomings of the 2D simulation for this task. The author of the article for the first time for such tasks formed a 3D model and got the solution of the problem in the software package “Fluent”. The article presents the results of 3D simulations and numerical experiments of turbulent mixing flows in the channels of the device.
INDUSTRIAL HEAT-POWER ENGINEERING
IMPROVE PROCESSES AND REDUCE ENERGY CONSUMPTION IN THE PETROCHEMICAL COMPLEX // Transactions of Academenergo. 2017. N 2. P. 48-60.
A.G. Laptev, M.M. Basharov, E.P. Afanasiev
Kazan State Power Engineering University, JSC TANECO’s, «Surgut Condensate Stabilization Plant»
Keywords: energy efficiency, teplomassoobmen, modernization, import substitution, petrochemistry.
The problems and challenges to reduce energy consumption in heat and mass transfer plants in the petrochemical complex. The ultimate goal of the research is to reduce energy consumption per unit of output in the petrochemical complex through the introduction of energy-saving schemes and heat and mass transfer devices and purification of gases and liquids. Theoretical basics of energy conservation and modernization of industrial plants. It focused on the rectification of Belleville and packed columns, whose work is characterized by high energy costs. It focused on the rectification of Belleville and packed columns, whose work is characterized by high energy costs. Given the design of some new tips and assessment of their efficiency. The results of calculations of rectification columns with various plates and nozzles and conclusions on the most effective designs of contact devices.
Thermodynamic and economic analysis of the efficiency of small heat-electric plants for power supply systems of cities // Transactions of Academenergo. 2017. N 2. P. 61-70.
Y.E. Nikolaev*, I.A. Vdovenko*, A.B. Dubinin**
*Saratov state technical University Gagarin Yu A.
** LLC «Energomash- Project», Moscow
Keywords: small CHPP with gas piston and gas turbine engines, coefficient of heat, modes of operation, thermodynamic and economic efficiency.
Working in many Russian cities the current heating systems are characterized by low values of thermal efficiency, reliability and ecological compatibility, which leads to high costs of production of thermal energy, lack of quality heating consumers. To increase the efficiency of systems energy supply small towns, it is recommended the construction of small CHPP with gas piston engines and gas turbine, using natural gas. In the article analyses of thermodynamic and economic efficiency of small CHP in the energy supply systems depending on the estimated coefficient of heat when working on the electrical and heat loading schedules.
ABOUT THE SCOPE OF APPLICATION OF GAS DEAERATION // Transactions of Academenergo. 2017. N 2.P. 71-83.
V.I. Sharapov, E.V. Kudryavtseva
Ulyanovsk State Technical University
Keywords: thermal power plant, the technology of deaeration, desorption, natural gas, scope of application
In this article developed new technology of low-temperature deaeration of the water using as desorbitada environment of natural gas. It is shown that in heat and power plants for various purposes the technologies are an effective means of anticorrosion water treatment. It is proved that the application of low-temperature natural gas deaeration of makeup water heating systems and incremental feed water boiler achieves the highest energy efficiency. It is advisable to use of the gas deaeration for corrosion treatment of water in the district hot water boiler and autonomous heating systems.
POWER AND MECHANICAL ENGINEERING
THE MODIFICATION OF GAS TURBINE INSTALLATION AT THE AIR-STORAGE GAS TURBINE PLANT // Transactions of Academenergo. 2017. N 2. P. 84-92.
R.Z. Aminov*, S.V. Novichkov**
* Saratov Scientific Center of the Russian Academy of Sciences
**Yuri Gagarin State Technical University of Saratov
The various gas turbine installations at the air-storage gas turbine plants intended for reduction of load curve irregularity are considered. The specific plant output of a unit stored air in the analysis of effectiveness of the air-storage gas turbine plant it is offered to use. The moisture vapour injection in the combustor and use of the binary combined-cycle plant for increase in production efficiency of the electric power on the basis of stored air in schemes of air-storage gas turbine plants it is offered.
ELASTIC AND PLASTIC FRAСTURE RESISTANCE PARAMETERS OF ALUMINUM ALLOYS UNDER DIFFERENT TYPES OF LOADING // Transactions of Academenergo. 2017. N 2. P. 93- 105.
Kazan Scientific Centre of the Russian Academy of Sciences
Keywords: plastic stress intensity factor, In-integral, surface flaw, constraint, uniaxial tension, three-point bend
Surface crack growth under tension and bending is studied through experiments and computations for aluminium alloys D16T and V95. Subject for studies is central notched specimens with external semi-elliptical surface crack for two types of initial notch.
Constraint parameters distributions are presented for the experimental surface crack paths in tested specimens as a function of aspect ratio, loading type and material properties. The governing parameter of stress-strain state in form of In-integral and plastic stress intensity factor were calculated for the experimental surface crack paths in tested specimens. It is stated that the elastic-plastic stress intensity factor is attractive as the self-dependent unified parameter for characterization of the material fracture resistance properties for semi-elliptical defects.
ECONOMICS, ECOLOGY, INNOVATIVE TECHNOLOGIES AND PROCESSES IN POWER ENGINEERING
ELECTRICAL ENERGY ORGANISATION IN REPUBLIC OF BURUNDI // Transactions of Academenergo. 2017. N 2. P. 106-114.
J.А. Manigomba, N.D. Chichirova
Kazan State Power Engineering University
Keywords: thermal power stations, biomass, electric power deficiency, minerals, ecology.
The paper analyses the power electric situation of Republic of Burundi, is shown the main types of existing and planned power stations. Has been done evaluation of production of electrical energy and was given the way of solving the problem of insufficient power energy, based on the creation of environmentally and ecologically thermal power stations which can use diesel fuel and biomass. Recycling of waste of cities and industries will solve the environmental problems.