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Copyright of Technical Electrodynamics / Tekhnichna Elektrodynamika is the property of National Academy of Sciences of Ukraine, Institute of Electrodynamics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Technical Electrodynamics / Tekhnichna Elektrodynamika is the property of National Academy of Sciences of Ukraine, Institute of Electrodynamics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

We consider the new method of the nondestructive diagnosis that investigates the rustiness degree of the beam reinforcement. The method is based on the difference of the rusty and "healthy" iron permittivity magnitude. Therefore, we can make conclusions about the presence of a rusty beam and the degree of its rustiness by measuring the electric capacity of the beam reinforcement section. In order to increase the reliability of the diagnosis results we suggest setting the additional electrodes on the edges of the working measuring electrodes. These additional electrodes are not connected with the working measuring electrodes.

Important scientific and technical problem of increasing operational efficiency of steam-turbine plants by developing new technologies for solving problems of efficient distribution of thermal and electrical loads between turbines and network heaters of cogeneration turbines during the heating period is solved in the paper. The scientific principles and methods for solving problems of both the analysis of power plant states, and their synthesis (optimization), taking into account a large number of factors, affecting the indicators of thermal circuit elements in their interaction, thus providing modeling of energy systems of different configurations with the ability to include new elements are developed. Additional modules of mathematical model and softwarecomputer complex for calculating thermal circuits to implement energy-saving measures are developed and introduced. Formulation and solution of the problem of determining rational operation modes of thermal circuits of low-capacity steam-turbine plants (confirmed by implementation acts) is first performed. For power units of industrial enterprises, expediency of building steamturbine plants up the power steam boilers (confirmed by implementation acts) is shown. The optimum modes of heat output from cogeneration turbines T-100/120-130 and T-250/300-240 (confirmed by implementation acts) are determined. The obtained results have shown the feasibility of solving the energy-saving optimization problems through generating additional electric power from CHP turbine plants. To solve this problem, new methods, which allow to propose measures on saving fuel and energy resources without additional capital investment, are used. [ABSTRACT FROM AUTHOR]

Copyright of Scientific Bulletin of National Mining University is the property of National Mining University, State Higher Educational Institution and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The capacitive method of control of degree of loosening of hatch-end packages of tooth zone of stator core of power turbo generator is proposed. It is shown that loosening is related to initiation of gas intervals between the sheets of package Control is carried out at overlapping of capacitive sensor on loosening package over the layer of dielectric. Sensor is the system of alternating highly-potential and low-potential parallel coplanar electrodes. A calculation model is developed and all components of electric capacitance of sensor are determined. These components is presented as dependences, relating sizes of sensors, thickness of isolating dielectric layer between surface of sensor and surface of package, and size of gaps between the sheets of package. It is shown that information about appearance of loosening is a change of one of components of electric capacity of sensor. Analytic dependences which have been obtained in this paper can be used for designing of real industrial device. [ABSTRACT FROM AUTHOR]