MODELING OF COLUMN APPARATUSES
Boyadjiev CHR. Institute of Chemical Engineering, Bulgarian Academy of Science
e-mail: chboyadj@bas.bg Keywords: column modeling, diffusion model, velocity nonuniformity, scale-up, scale effect, average concentration models, parameter identification. Absrtract: A diffusion type of model for simulation of column apparatuses processes is presented. On this base is explained the processes efficiency decrease as a result of the radial nonuniformity of the velocity distribution at the cross-section’s area of the column. An average concentration model is proposed for simulation of the scale effect in industrial columns. A hierarchical approach for model parameters identification is shown. |
| HEAT TRANSFER AND HYDRAULIC RESISTANCE OF PIPES WITH INSERTED TWISTED TAPE AND VARIOUS ENTRANCE CONDITIONS
Ilyin G.K., Tarasevich S.E., Yakovlev A.B. e-mail: dobryh@yandex.ru
Key words: heat transfer, hydraulic resistance, pipes with inserted twisted tape
Absrtract:
Results of the experimental research of the convective heat transfer and hydraulic resistance of pipes (including with the inserted direct and twisted tapes) in water current of and various entrance conditions are presented. Generalizing dependences for calculation of a convective heat transfer on an initial section of pipes with the twisted tape insert at an axial and radial flow entry are received. |
HEAT TRANSFER ENHANCEMENT IN SHELL-AND-TUBE HEAT-EXCHANGE APPARATUS OF THERMO-TECHNOLOGICAL GAS SEPARATION SCHEME IN ETHYLENE PRODUCTION. REPORT 2
Islamova S.I., Shamsutdinov E.V. The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan e-mail: isvetulia@mail.ru
Keywords heat transfer enhancement, discrete coarseness, heat-hydrodynamic efficiency
Absrtract:
This report is continuation of article «Heat transfer enhancement in shell-and-tube heat-exchange apparatus of thermo-technological gas separation scheme in ethylene production». Earlier set out results of computational accounts of heat transfer enhancement at streamline motion water in tube canals of three heat exchangers with simulated turbulization in uniform of semicircle. In this article set out results of computational accounts of heat transfer enhancement at streamline motion water in canals with simulated turbulization in uniform of right-angled triangle first type. Keywords: heat transfer enhancement, discrete coarseness, heat-hydrodynamic efficiency |
| HEAT TRANSFER FROM A CYLINDER WITH VORTEX CELLS IN CROSS-FLOW
Morenko I.V., Fedyaev V.L. e-mail: morenko@mail.knc.ru
Russian Academy of Sciences Kazan Science Center
Institute of Mechanics and Engineering
Key words: non-isothermal viscous flow, laminar and turbulent regimes, vortex cells, heat transfer.
Abstract
Non-isothermal viscous flow around a cylinder with vortex cells is investigated numerically at laminar and turbulent regimes. The laminar flow and heat transfer is described by a set of Navier- Stokes equations and energy equations. The turbulent flow described by a Reynolds-averaged Navier-Stokes equations closed using the Menter zonal model of transport of shear stresses. Water is considered to be the working fluid and Prandtl number is set to be 7.0. The influence of the Reynolds number and the depth of cells on the heat transfer is analyzed. |
INDUSTRIAL HEAT-AND-POWER ENGINEERING |
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| THE DEVELOPMENT OF RECYCLING HIGH POTENTIAL SECONDARY POWER RESOURCES SYSTEM
Muhametshina E.I., Shamsutdinov E.V. The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan e-mail: isvetulia@mail.ru
Keywords: thermal and thermodynamic efficiency, industrial furnaces, recycling, potential of temperature, exergy, secondary energy resources, the flue gases
Absrtract: The work is based on a study of the thermal and thermodynamic efficiency of industrial furnaces, as well as on the introduction into the system of work furnaces recovering apparatus, the operation of which will reduce the temperature potential of the flue gas into the atmosphere and to receive additional energy resources for the production of ethylene oxide. In the case of the proposed solution the saving of steam used for the technological needs of production could reach 23% of total annual consumption. |
| IMPROVEMENT OF THE STRUCTURE AND WORKING TECHNOLOGIES OF THE CENTRAL HEAT SUPPLY SYSTEMS IN THE CITIES
Sharapov V.I., Orlov M.E. e-mail: vlad-sharapov2008@yandex.ru, mio@ulstu.ru
Ulyanovsk State Technical University
Keywords: central heat supply systems, improvement of the structure, multifunction heat supply systems, increasing to efficiency of the heat sources.
Abstract
The main problems of the citiy heat supply systems are analysed. The basic principles of the structural development and improvement of the heat supply technologies are presented. The high efficient technologies for the heat sources and heat supply systems are offered. |
POWER GENERATION STATIONS |
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| SYSTEMATIZATION AND ANALYSIS OF OPERATIONAL DAMAGES IN HEAT-GENERATING EQUIPMENT ELEMENTS
Sorokin A.YU. e-mail: SorokinAU@gencom.tatenergo.ru
JSC «Generation Company» TATENERGO
Keywords: The steam turbine, phase transition zone
Abstract:
Operational damages of steam turbine elements in phase transition zone and of turbine final blades working in wet steam on JSC “Generation Company” branches from 2003 to 2008 have been systematized. Turbines manufactured on Ural Turbine-Motor Plant Т-105/120-130, Т-110/120-130, Т-185-130, Т-50-130 and turbines manufactured on Leningrad Metal Plant ПТ-135/165-130, ПТ-60-130 have been examined. |
| THE MATHEMATICAL MODELING AND OPTIMIZATION OF THE WATER COOLING TOWER
Fedyaev V.L. e-mail: morenko@mail.knc.ru
Russian Academy of Sciences Kazan Science Center
Institute of Mechanics and Engineering
Key words: Non-isothermal viscous flow, laminar and turbulent regimes, vortex cells, heat transfer.
Abstract
The facilities of the cooling tower and the principle of operation are briefly described. The main processes by cooling reused water are shown. The describing mathematical patterns and optimization problem, consisting of structure synthesis task and parametric optimization are produced.
In detail are considered the optimization problem of water cooling tower and its cooling water distribution according to irrigation area. |
POWER AND MECHANICAL ENGINEERING |
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| DIFFERENT FORM OF SURFACE SEMI-ELLIPTICAL FLAW BEHAVIOR UNDER BIAXIAL MIXED-MODE LOADING
Tumanov A.V., Shlyannikov V.N. The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan e-mail: tymanoff@rambler.ru , shlyannikov@mail.ru
Keywords: biaxial loading, mixed forms of deformation, semi-elliptic crack, the normal gap, the transverse shear Antiplane slice, oblique crack, plastic zone.
Abstract:
The state of the inclined surface semi-elliptical cracks of different shapes in the plan at the plate under biaxial loading. The method of interpretation of the calculation results of stress fields with mixed forms of deformation types of separation, shear and cut. Introduced plastic mixed and options based on the numerical results shows the character of their changes along the crack front. |
ECONOMICS, ECOLOGY, INNOVATIVE TECHNOLOGIES AND PROCESSES IN POWER ENGINEERING |
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| METHODS OF PLANNING OF FUEL AND ENERGY BALANCE
Karaeva YU.V., Daminov A.Z. The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan e-mail: daminov@list.ru
Keywords: energy balance, fuel and energy complex, energy, modeling, forecasting, optimization
Abstract:
With the development and implementation of long-term energy policy is an important tool for the balance of fuel and energy resources. The work is devoted to methods of planning energy balance. The article presents the classification of balance sheets, depending on the purpose and type of analysis described settlement systems and mathematical models used in solving the problems of balanced development of the energy sector. The methodology, which is the basis for the preparation of the Energy Strategy of Russia. The paper described the priorities, approaches and methods of analysis and forecasting processes in the production and consumption of energy resources. |
