The paper considers a method for calculation of power expenditure required for industrial enterprise lighting. Method has been proposed that assumes distribution of annual power requirements in quarters with due account of mean value of night-time duration. The paper contains analytical dependences that make it possible to determine a turn-on time of lighting equipment for a calculated period. Their application improves accuracy pertaining to calculation of power expenditure for artificial lighting of industrial enterprises.

An estimation of influence of the development of macroeconomic and power parameters on the amount of long-term demand for power resources is presented in the paper. The estimation is based on application of a factorial decomposition method while using methods of strategic management theory and similarity theory.

The paper justifies necessity to use current filters of symmetric components, in particular, combined filters of positive and negative phase-sequences for protection of three-phase receivers.

Results pertaining to calculation of currents of various phase-sequences for emergency cases with small current are presented in the paper. The paper reveals that protective devices designed on the basis of current filters of symmetric components efficiently improve protection of consumers’ electrical installations and increase their operational safety.

The paper investigates an efficiency pertaining to application of shunt reactors in combination with longitudinal capacitance compensation of inductive line impedance and controlled shunt reactors for 500 kV power lines in Vietnam with inductive load component. The author shows that application of the controlled shunt reactors permits to economize significantly due to decrease of power losses in the line and decrease of expenditures for operation of electric and power-generating equipment.

An analysis of development trends in the CIS machine-building industry and current status of the heating and heat treatment furnaces of main machine-building enterprises of the Republic of Belarus as of the 1st quarter of 2008 is given in the paper.

The paper presents the most efficient engineering solutions from technological and economic point of view that concern calculation and designing of up-to-date gas-flame plants which are to be applied for modernization of the current heating and heat treatment furnaces of the machine-building enterprises in the Republic of Belarus.

A thermo-technical calculation of main indices of the up-to-date gas-flame plant has been carried out in the paper.

The paper considers methods of technical cogeneration plant enhancement of the Belarussian power system, improvement of operational efficiency of their basic equipment. Examples of the realized reconstructions and prospective projects which are either under realization or to be executed are given in the paper. The authors are making a comparative analysis of domestic experience and world-wide achievements.

A mathematical model and an algorithm for numerical solution of conjugate problem concerning hydrodynamics and heat transfer of hardening and cooling processes with liquid metal flow is given in the paper.

Quantitative relationships between heating and hydrodynamic parameters of moving melts in the channels of metallic molds of special casting technologies have been determined in the paper. The analysis of temperature pattern and velocity field makes it possible to reveal an influence of boundary conditions on melt flow structure.

The investigations, executed in the 70-ies-80-ies of the last century, have demonstrated that an operator is badly managing his/her duties and makes mistakes while controlling the operation of power-generating equipment. The developed countries, Russia have developed systems of automatic monitoring for equipment operation which are designed for providing the required data in emergency cases to an operator.

A system of automatic detection and analysis of operational failures of electric power station equipment has been developed in the Belarussian Heat Power Engineering Institute and it has been brought into industrial commission.

The paper investigates dynamics of rectification process on one plate of a column. The basic channels controlling brew-rectification process are described in the paper.

The paper also considers problems pertaining to synthesis of an adaptive system that controls non-stationary objects with delay. Synthesis of adaptive systems that automatically control product quality and saving on power resources and productivity with the help of the second method of Lyapunov has been carried out in the paper.

Industrial introduction of the given automatic control system of technological process shall permit to increase productivity of a rectification (10–15) %, to decrease specific power consumption by (5–10) % while preserving the specified quality of rectified ethyl alcohol and decrease alcohol losses with luting water and malt-residue.

The paper analyzes present state of the equipment and organization of aspiration at wood-working shops. Proposals pertaining to higher efficiency and reduction of power intensity of aspiration systems are given in the paper. Materials presented at the stage of designing make it possible to select a rational system scheme and reduce power expenditure at woodworking industry.

The paper considers a mathematical model for pulsation process of spherical underwater gas explosion products in a hole during gas-impulse regeneration of filters. A second-order differential equation with constant coefficients has been derived in the paper. A special calculation program has been developed to solve the equation. Expressions have been obtained to calculate a maximum radius of a spherical explosion chamber at the end of expansion process and pressure impulse during the first half-cycle of the pulsation.