Contents

HEAT-AND-POWER ENGINEERING FUNDAMENTALS

DISTRIBUTION OF STATIC PRESSURE IN SMOOTH PIPE AT PULSATILE FLOW REGIMES
I.A.Davletshin, A.I.Davletshin, A.E.Goltsman, N.I.Miheev

e-mail: davlet60@mail.ru
Research Center for Power Engineering Problems of the Russian Academy of Sciences
Keywords: static pressure, flow friction, amplitude of superimposed pulsations, frequency of  superimposed pulsations, pulsatile flow regime, flow root-mean-square velocity pulsations, smooth channel
Abstract
Experimental results of flow friction research in smooth pipe with oscillatory air flow variation over wide range of amplitude and frequency of superimposed pulsations are presented. The influence extent of nonstationarity parameters on channel length distribution of time-averaged static pressure is defined.

INDUSTRIAL HEAT-AND-POWER ENGINEERING

DEFINITION OF THE THERMAL LOSSES FROM THE RECTIFYING COLUMN INTO ENVIRONMENT
A.S. Gavrilov, A.G. Laptev
e-mail: artemchik-@mail.ru
The Kazan State Power University
Keywords: a thermal isolation, a rectifying column, a heat–transfer coefficient, a bubble layer, gas content, energy saving, a boundary layer’s model, the Surgut factory of gas condensate’s stabilisation.
Abstract
The method and the calculation of the thermal losses from rectifying device into environment are presented. The thermal losses through the rectifying columns wall are comparative analysed, using various kinds of heat–insulated materials.

POWER GENERATION STATIONS

EFFICIENCY OF BASE LOADING OF THE ATOMIC POWER STATION AT THE EXPENSE OF UNLOADING OF THERMAL POWER STATIONS
R.Z.Aminov, A.F.Shkret, E.J.Burdenkova, M.V.Garievsky
e-mail: oepran@inbox.ru
The Power Engineering problems of Saratov research centre of RAS
Keywords: nuclear power plant, base loading, thermoelectric power station, the efficiency of loading
Abstract
The article presents the technique and results of comparative efficiency estimation of base loading maintenance of the atomic power station at the expense of unloading of power units of thermal power stations during the night failure hours of electric loading graph of power supply systems.
DEVELOPMENT AND CREATION OF THE THERMAL POWER STATION WITH HIGH ECOLOGICAL INDICATORS
N.D. Chichirova*, A.A. Chichirov*, A.I. Lyapin*, А.G. Korolev**, T.F. Vafin*
e-mail: pinpin3@yandex.ru
*Kazan State Power University, **Research Center for Power Engineering Problems of the Russian Academy of Sciences
Кeywords: ecologically safe thermal power station, low-waste technologies, water preparation, water treatment, electromembrane module
Abstract
The electromembrane module for processing blowdown of thermodesalting complex with obtaining alkali was developed and applied in Kazan thermal power station-3.
EFFICIENCY COOLING IMPROVEMENT OF THE COOLING TOWER ON EXAMPLE OF BG-1520
M.M. Subkhangulov*, N.D. Chichirova**
e-mail: marx1986@yandex.ru
*Kazan State Power University, **Research Center for Power Engineering Problems of the Russian Academy of Sciences
Кeywords: cooling tower, cooling of circulating water, thermal power plant, nuclear power plant
Abstract
The new method for efficiency improvement of the cooling tower, based on natural draught increasing was developed. As example for calculation the cooling tower WT№4 KPEP-2 was used. The series of measuring in the cooling tower and the heat calculation of cooling tower were carrid out.

 POWER AND MECHANICAL ENGINEERING

NONLINEAR IN-PLANE AND OUT-OF-PLANE CONSTRAINT EFFECTS UNDER BIAXIAL LOADING
V.N.Shlyannikov, N.V.Boichenko, A.M.Tartygasheva
e-mail: shlyannikov@mail.ru
Research Center for Power Engineering Problems of the Russian Academy of Sciences
Keywords: in-plane and out-of-plane constraint, mixed mode, biaxial loading, plastic and creep
Abstract
In-plane and out-of-plane constraint effects on crack tip stress fields under both elastic-plastic and creep conditions are studied by means of three-dimensional numerical analyses of finite size boundary layer models and plane strain reference solutions. Characterization of constraint effects in terms of the non-singular T-stress, the local triaxiality parameter h and Tz-factor is investigated. The influence of load biaxiality, mode mixity and creep time on the behavior of constraint factors are considered. The computational data for constraint factors variation under the plane strain are compared with the constraint parameter distributions for the finite thickness plate. It is found that under biaxial mixed mode loading the difference between the full three-dimensional elastic-plastic and creep stress fields and the plane strain reference solutions appears to depend on the distance to the crack tip and to the free surface of the plate.

ECONOMICS, ECOLOGY, INNOVATIVE TECHNOLOGIES AND PROCESSES IN POWER ENGINEERING

AN ITERATIVE METHOD FOR MODEL PARAMETER IDENTIFICATION OF THERMODINAMICAL MODELS
E. Dimitrova*, N. Brauner**, Chr. Boyadjiev*, M. Shacham***
e-mail: chboyadj@bas.bg
*Bulgarian Academy of Sciences, Institute of Chemical Engineering, **School of Engineering, Tel-Aviv University, ***Dept. Chem. Eng., Ben-Gurion University
Keywords: thermodynamical model; regression model; parameter identification; iterative method; incorrect inverse problem; incorrectness criterion; model adequacy; model suitability; clapeyron model; antoan model.
Abstract
An iterative method for model parameter identification of thermodynamical models of regression type has been proposed. The method is applicable for modeling of temperature and pressure dependence of different thermodynamic quantities. The method was tested for two and three parameter strong non-linear regression models. The correct, incorrect and essentially incorrect cases have been discussed.  A statistical analysis of the model adequacy or suitability is a criterion for the correctness of the parameter identification results. An incorrectness criterion has been proposed. Different possibilities for method exactness increasing have been discussed.  The method is demonstrated for modeling of the temperature dependence of the vapour pressure of Ethane. As mathematical models are used linear and non-linear forms of the Clapeyron and Antoan models.