Transactions of Academenergo 2009 №4

The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan

e-mail: vachaginae@mail.ru

Keywords: Polymerization, heat and mass transfer, intensification, discrete roughness, unnewtonian liquid, laminar flow, unstationary.

Abstract

The generalized mathematical model of the non-stationary heat and mass transfer in intensified tubular homophase polymerization continuous action reactor is presented. It reflects mutual influence of the hydrodynamical and heat and mass transfer parameters, compelled convection, exothermicity reactions, dissipative allocation of heat, conditions of deformation of environment, macro kinetics and other factors, describing process of polymers synthesis as complex chemico-technological system. The model considers the hydrodynamical, thermalphysic parameters changes of polymerization process, both on reactor length, and concerning time changes, taking into account the variable viscosity during whole technological process. Unstationary processes heat and mass transfer simulate time changes as the liquid charge through cross-section of the channel and temperature change on the reactor wall. As the method of intensification heat and mass transfer is the method of destruction parietal layers of liquid by drawing periodic cross-section discrete roughness on wall of reactor considering. The method and algorithm of calculation of the complex non-stationary heat-mass hydrodynamic transfer systems are developed, differing by the non-newton behavior during processing.

The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan

e-mail: rustemran@mail.ru

Keywords: experimental facility, a heat exchange intensification, discrete-rough channel, laminar flow, viscous medium.

Abstract

The experimental installation intended for research of an intensification of process of heat exchange at a laminar flow of viscous fluids in channels of the heat power equipment with use of various periodic is discrete-rough surfaces at various charges and temperatures of heat-transfer agent and boundary conditions on walls of the channel is developed. The principle of work of installation is presented and the lapse of measuring apparatuses is sized up. Formulas for machining of results of the experimental researches, providing definition of integrated characteristics of process are resulted: averages on ambit and length of pipes and channels of factors of a convective heat exchange and water resistance factors. Actuating mediums are turbine oil Tp-46 and transformer oil TKP. Results of test researches are resulted.

INDUSTRIAL HEAT-AND-POWER ENGINEERING

PROBLEM SOLVING ALGORITHM FOR INCREASING THE EFFECTIVENESS OF ENERGY USE IN THE PETROCHEMICAL PLANT
S.I. Islamova, E.V. Shamsutdinov

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: Secondary energy resources, petrochemical plant, energy saving, intensification of heat exchange.

Abstract: In work developed problem algorithm to increase of effectiveness use of energy of petrochemical plant is presented, it is permitting to realize integrated approach when generation systemic energy saving measures. Algorithm is based on use the heat exchange theory, the engineering thermodynamics, the system analysis and the mathematical modeling methods. Realization of this algorithm allow to develop the circuit design effective involvement of secondary energy resources at system of energy-supply, as well as the procedures increase energy effectiveness several of thermo-technological device.

POWER GENERATION STATIONS

THE OPTIMIZATION OF SPECIFIC EXERGIC AND TECHNICAL AND ECONOMIC INDICES OF COAL MINI THERMAL POWER PLANTS
O.V. Afanaseva, G.R. Mingaleeva

The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan

e-mail: eccolga@mail.ru, mingaleeva_guzel@mail.ru

Keywords: Coal, exergy consumption unit, specific the technical and economic values, optimization, mini-thermal power plant, c-curve

Abstract:

Carried out is the calculation of specific expenses of exergy and technical and economic indices for mini thermal power plants working on coal. The comparison of exergy and explicit costs expenses is shown by construction the S-curve for each power plant, where the optimum relationship of thermodynamic and technical and economic indicators is defined. As the basic variable indicator is the price for coal acting and is calculated the change of specific technical and economic indices of power station operation for 15 years.

STRESS FIELDS FOR INCLINED SEMI-ELLIPTICAL CRACK UNDER BIAXIAL LOADING
A.V.Tumanov

The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan

e-mail: tymanoff@rambler.ru 

Keywords:  inclined semi-elliptical crack, crack growth direction, load biaxiality, strain energy density parameter, mixed mode

Abstract: The behavior of inclined surface semi-elliptical cracks different form in plate is considered. On the basis of numerical results elastic-plastic stress fields depending on section position along of curvilinear crack front, initial crack angle, aspect ratio, crack tip distance and load biaxiality are shown.

The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan

e-mail: shlyannikov@mail.ru

Keywords: inclined semi-elliptical crack, crack growth direction, load biaxiality, strain energy density parameter, mixed mode

Abstract: Elastic criterion of the inclined semi-elliptical crack growth direction is elaborated on the basis of the strain energy density parameter. Stress and displacement fields are presented for higher order terms asymptotic expansion. Solution for elastic stress intensity factor is accounting for the function of the crack point position on free surface of plate. The behavior of crack growth direction along the semi-elliptical crack front for different combination of biaxial loading, initial crack angle and surface crack behavior is determined.

ECONOMICS, ECOLOGY, INNOVATIVE TECHNOLOGIES AND PROCESSES IN POWER ENGINEERING

DISTRIBUTION OF ELASTIC WAVES ON SITE OF THE PERFORATED CASING STRING OF THE WELL
R.N. Gataullin, J.I. Kravtsov, E.A. Marfin

The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan

e-mail: rustem.acadrome@mail.ru

Keywords: wave influence, a well, a casing string, a perforation, a fluctuation frequency, a quality factor.

Abstract: The experimental stand for studying wave processes in a well is designed and produced. The theoretical and an experimental investigation the process of distribution elastic waves are carried out in a zone of perforated site of casing string well. It is experimentally shown, that the stimulation in current stream of fluctuations, close to free-running frequency of the restricted fluid column, the well reacts as the acoustic system promoting increasing of amplitude. The performance influence of the perforated site well is revealed. The relations describing intercoupling of free-running frequency of the fluid column and a quality factor of system in well with its geometrical medium parameters and properties are determined. The comparison of the theoretical and experimental data and correlation between them is carried out.

The Research Center of Problems of Power Engineering of Kazan Science Center of the Russian Academy of Sciences, Kazan   

e-mail: energoed@mail.ru

Keywords: natural bitumen, oxygen-steam gasification, power gas

Abstract: The definition method of the components of the power gas content is described, received by carrying out of oxygen-steam gasification process of natural bitumens, using reaction of water steam balance with the balance equations of the basic power gas components. The pressure as regime parameter was not considered. As a result of the researches, on the basis of the presented method, the structure of the power gas content is received and the power gas quantity is defined. The dependences of thermal efficiency of gas generator in the steam: bitumen relation in the range of bitumen heating temperature 150-400ºС are revealed

e-mail: ochkov@twt.mpei.ac.ru

Ochkov V.F./1, Selleck Colin /2, Gurke Sasha /3

1 Moscow state power university

2 Binghamton University (New York, USA)

3 Knovel Corp (New York, USA)

Keywords: heat engineering, internet, reference books, problem books, problem solution books, cloud computing

Abstract: Presented are the results of activities on making open, interactive, network problem solution books and reference books in heat engineering, heat- and power-engineering. Problems of methods and technology in this new field existing at the junction of power-engineering and information technology are discussed.