Contents
HEAT-AND-POWER ENGINEERING FUNDAMENTALS
HEAT EXCHANGE AT LAMINAR FLOW CURRENT NON-NEWTONIAN LIQUIDS ON THE INITIAL THERMAL SITE OF ROUND PIPE AT VARIOUS LAWS OF CHANGE OF NUMBER BIO
A.I.Kadyyrov
e-mail: aidarik@rambler.ru
Research center fоr Power Engineering Problems Kazan Scientific Center Russian Academy of Sciences
Keywords: initial thermal region, non-Newtonian liquids, number Bio, heat exchange, the linear and harmonious law.
Abstract
The research of critical modes of heat exchange are resulted at laminar current non-Newtonian liquids on an initial thermal site of a round pipe. On pipe walls the heat exchange with characteristic number Био is carried out. The constant, linear or periodic cases of its change are considered. Numerical calculations are carried out and as a result the occurrence of progressive increase of temperature for considered laws of change of number Био are found out. Precritical surfaces of operating parameters for pseudo-plastic, Newtonian and dilatant liquids are constructed at various laws of change of number Bio.
RESEARCH OF THE CRITICAL MODES OF HEAT EXCHANGE AT THE SINUSOIDAL TEMPERATURE CHANGE ON THE PIPE WALL AND PREVAILING CHEMICAL THERMAL EMISSION IN THE FLOW OF NONLINEAR-VISCID LIQUID
D.V. Ananev, G.R. Halitova
e-mail: Dima211083@yandex.ru
Research center fоr Power Engineering Problems Kazan Scientific Center Russian Academy of Sciences
Keywords: Numeral research, unstationary, sinusoidal change of temperature, heat exchange, laminar flow, nonlinear-viscid liquid
Abstract
The results of numeral research of unstationary task of flow of viscid liquid are presented in the round pipe, with the prevailing chemical source of thermal emission, at the sinusoidal law of temperature change on the pipe wall. During the numeral experiment the dependences of maximal dimensionless temperature and speed on the pipe axis are determined, as well as middle on the section of viscidity from the handling process parameters. The uncritical surfaces, consisting of maximum legitimate values of the handling parameters are built separating regions of legitimate values of temperatures in thread of liquid from the high temperature, critical modes of heat exchange.
JET RADIATOR OF ELASTIC WAVES ON THE BASIS OF HELMHOLTZ RESONATOR AS OSCILLATORY CONTOUR
E.A. Marfin, Ja.I. Kravtsov
e-mail: marfin@mail.knc.ru
Research centre of power engineering problems of the Kazan Science Centre of the Russian Academy of Sciences
Keywords: a jet radiator, resonator Helmholtz, resonant chamber, integrated influence; a productive layer, oil.
Abstract
The characteristics of a jet radiator of elastic waves on the basis of Helmholtz resonator is devices for realization energy-saving technology of the integrated influence on oil layers are investigated. Operating as the oscillatory contour, a radiator promotes the amplitude increase of external fluctuations at the frequencies close to frequency of own fluctuations, and to absorption of energy of fluctuations – on other frequencies. On the basis of a method of electro-acoustic analogies authors have establish the interrelation of frequency and geometrical characteristics of a radiator. The system of the equations, allowing describing this interrelation is offered. Adequacy of algorithm to real processes is experimentally confirmed.
INDUSTRIAL HEAT-AND-POWER ENGINEERING
RESEARCH TERMS OF ORIGIN CRITICAL POLYMERIZATIONS MODES IN hOMOPHASe TUBULAR REACTOR OF CONTINUOUS ACTION AT PERIODIC CHANGE OF TEMPERATURE ON ITS WALL
D.V. Ananev
e-mail: Dima211083@yandex.ru
Research center fоr Power Engineering Problems Kazan Scientific Center Russian Academy of Sciences
Keywords: Unstationary heat and mass transfer, reactor, polymerization, critical mode, uncritical surfaces, laminar flow
Abstract
The task of unstationary heat and mass transfer is considered in the homophase tubular reactor of continuous action in the conditions of periodic and linear temperature change of wall of reactor. The terms of origin of the critical modes of polymerization are definite in the homophase tubular reactor of continuous action at the unstationary process of heat and mass transfer. The results of numeral researches at the periodic and linear law of temperature change on the reactor wall are presented as fields of temperature, vector of speed and un critical surfaces. As a reological model the Kutateladze-Habahpasheva model is used.
ENERGY PERFORMANCE EFFICIENCY OF THE BASIC EQUIPMENT OF HEAT-TECHNOLOGICAL SCHEME OF ACID DIGESTION STAGE IN PHENOL AND ACETONE CO-PRODUCTION
D.V.Yermolaev
e-mail: denlion@list.ru
Research Center for Power Engineering Problems of the Russian Academy of Sciences
Keywords: Efficiency, heat, exergy, refluxer, condenser.
Abstract
The results of the analysis of calorific and thermodynamic performance heat-exchange equipment of heat-technological scheme are presented at the stage of the acid digestion of cumene hydroperoxide in co-production of phenol and acetone of factory “Ethylene” of Open Society ” Kazanorgsintez”. The balance equations describing processes, proceeding in vehicles are introduced. The basic flow performances is the rate, press, temperature are given, the dependence on definition of values of heat and exergy on vehicles and performance are introduced, the greatest losses in vehicles on groups of members are revealed.
POWER GENERATION STATIONS
ESTIMATION OF THE THERMAL EFFECTIVENESS OF THE FUEL PREPARATION SYSTEM OF MINI heat and power plant WITH PYROLYSIS OF COAL
O.V. Afanaseva, G.R. Mingaleeva
e-mail: eccolga@mail.ru , mingaleeva-gr@mail.ru
Research Center for Power Engineering Problems of the Russian Academy of Sciences
Keywords: Small power, firm fuel, the analysis of structure, thermal efficiency.
Abstract
At present time the development of the decentralized power supply on the basis of the small power stations creation becomes one of perspective directions. The system of preparation of coal for mini heat and power plant with intracyclic pyrolysis and gasification of coal char is considered. On an example of the given scheme the analysis of structure of external and internal communications in system for revealing of the closed and opened sequences of elements and definition of sequence of calculation is carried out. Due to thermal calculation expenses and characteristics of heat-carriers brought and taken away from system, and also thermal efficiency of separate blocks and all system as a whole are defined.
POWER AND MECHANICAL ENGINEERING
APPROXIMATION OF AMPLITUDE COEFFICIENT IN HIGHER-ORDER MODEL FOR ELASTIC-PLASTIC-VISCOUSE MATERIAL
N.V.Boychenko*, O.V. Kleidman**, O.N. Tyuleneva***
e-mail: tasha1203@mail.ru
*Research Center for Power Engineering Problems of the Russian Academy of Sciences ** Kazan State Power Engineering University *** Kazan State University Abstract
Keywords: Biaxial loading, higher-order terms, crack-tip field, plane strain, creeping materials.
Abstract
The amplitude coefficients of three-term asymptotic crack-tip fields were calculation. The amplitude coefficients distributions for three types of biaxial stress states, creep time and crack distance are displayed. By fitting numerical results for creeping material, empirical formulae is obtained to describe the higher-order terms amplitude coefficients A2 distributions depending on biaxial stress ratio, crack distance and creep time.
The obtained change function of amplitude coefficients А2 permits to insert the calculation complex and to determine crack tip stress-strain state parameters for all scaleable values from examined range.
USE OF UNDERMETHOD AT CALCULATION OF THE CYLINDER WITH THE SEMIELLIPTIC CRACK
R.F.Shagivaleev, R.R.Yarullin
e-mail: shagivaleevramil@mail.ru , yarullin_r@mail.ru
Research Center for Power Engineering Problems of the Russian Academy of Sciences
Keywords: semielliptic crack, crack front, the cylinder, final elements method, intensity of pressure.
Abstract
Being based on method principles, the three-dimensional model of the cylinder with an internal semielliptic crack has been generated. By change of a grid of final elements of a submodel in the field of crack top it has been found steady decisions. The optimal size of an element at the front cracks, from the point of view of reception of enough exact decision and spent time for the account is defined. Radial distributions a component of pressure for various sections along crack front are presented. Also angular distributions a component of pressure on front of a crack for all variants of submodels are presented.
ECONOMICS, ECOLOGY, INNOVATIVE TECHNOLOGIES AND PROCESSES IN POWER ENGINEERING
METHODS AND DIRECTIONS OF THE SUN ENERGY USE IN AGROINDUSTRIAL COMPLEX OF RUSSIA
Y.G. Nazmeev, R.M. Nigmatullin, E.V. Shamsutdinov
e-mail: EShamsutd.kazan.@mail.ru
Research centre of energy problems of Kazan scientific centre of Russian Academy Sciences,
Keywords: sun energy, energy saving, helio-system, collector, method of transformation, device, agriculture.
Abstract
The review of basic methods and directions of the use of sun energy are presented. Four possible variants of the use of sun energy are considered: thermotechnical, phitobiological, photophysical and chemical. Because of simplicity of technical realization and efficiency during the protracted exploitation for the agroindustrial complex of the Russia are recommended thermotechnical method of transformation of sun energy with the use of sun collector and photoelectric method of transformation of radiant energy in the electric energy by the semiconductor sun batteries. The regions are definite, where the use of devices of the sun energy systems supply is expedient. The work and efficiency of different helio-systems, the most acceptable to the use in agriculture is analyzed, for the thermal and electric energy and water rise.
CALCULATION OF THE MAXIMAL GROUND CONCENTRATION EMISSIONS OF THE HEAT POWER ENTERPRISES
A.A.Fedosov
e-mail: fedosov-kazan@mail.ru
Research Center of Power Engineering Problems of Kazan Science Center the Russian Academy of Sciences
Keywords: Heat power system, modeling, emissions, ground concentration, wind speed
Abstract
The various ways of the value estimation of the maximal ground concentration emissions of the heat power enterprises are presented. The stationary dot source problem of gaseous emissions in height h and by capacity emission Q, located in the beginning rectangular system of coordinates which axis is considered in direction of the wind, and the axis vertically upwards. The analysis of results has shown that the fixed distance from a source emission there is usually the maximum of ground concentration realized by some wind speed. By increase in distance from the pipe this maximum is displaced aside smaller values of wind speed. Near to the pipe at any wind speed there is a zone of practically zero emissions concentration.
OPTIMISATION OF EMITTER DYNAMIC PERFORMANCES SUBJECT TO INFLUENCE OF RESERVOIR CONDITIONS ON THE WAVE FIELD AT APPLICATION OF HORIZONTAL WELLS
R.N.Gataullin *, J.I.Kravtsov *, S.J.Kohanova **
e-mail: rustem.acadrome@mail.ru
* Research centre of power engineering problems of the Kazan Scientific Centre of RAS ** The Kazan state technical university of A.N. Tupolev
Keywords: oil, the native bitumen, the integrated influence, a productive layer, wave influence, a horizontal well.
Abstract
The mode of the integrated bed stimulation in the conditions of a horizontal well by means of the controllable physical fields is considered allowing to the maximum to increase oil recovery , and also to intensify process of hydrocarbon extraction. It can be reached by a simultaneous bed stimulation thermal and wave fields at working substance injection through the emitter of oscillating erected on a bottom of a well. The parameters on horizontal well (GW) production rate are defined. In particular it is erected, that the greatest influence on the output of GW renders an in-place permeability and the oilviscosity. The method of definition the optimum values of emitter dynamic performances is tendered, allowing to choose the way and an affecting mode on a productive layer.
RESEARCH THE MECHANISMS OF AN ENERGY DISSIPATION OF ELASTIC WAVES IN FLUID IN THE CONDITIONS OF FACE INJECTION WELLS
A.R.Zagidullina, E.A.Butorin
e-mail: butorin06@mail.ru
Research centre of power engineering problems of the Kazan Scientific Centre of the Russian Academy of Sciences
Keywords: emitter of oscillatings, well, productive layer, dissipation, quality factor.
Abstract
The study of the distribution laws of elastic waves in a fluid column at the injection wells by wave influence on the productive layer. For power losses estimation (quality factor) the dynamic system «an emitter – a well – a layer» is reviewed. The mechanism of power transmission of oscillatings in coercible and incompressible layer fluids and, in particular – dissipations of elastic waves energy in layer fluids is reviewed. It is revealed, that in the conditions of application the incompressible fluid by a major factor instituting a dissipation the energy of elastic waves is the shift viscosity, and in compressible fluid – thermal radiation, thermal conductivity and volume deformation. The dependence on values an absorption coefficient of the elastic waves is erected, allowing to estimate the dissipation of energy oscillatings and to optimise dynamic performances of the emitter pressure oscillations.