Currently, there are widely used combined (hybrid)
power systems in the world, made using renewable
and conventional sources of energy. The article
discusses a typical structural scheme of a combined
system of electricity supply; it also shows the design
and the characteristics of three types of structural
circuit design of combined power systems and their
main advantages and disadvantages. Peculiarities of
the choice and calculation of parameters of the basic
functional elements of the combined system have
been presented. This study describes main
characteristics of solar batteries and provides
analytical expressions for the calculation of their
main parameters. The main characteristics of
batteries and the peculiarities of calculation of the
capacity of storage batteries operating in autonomous
systems have been listed. The features of selection of
voltage inverters have shown that in addition to the
nominal input and output voltage it is necessary to
consider other characteristics that influence the work
of autonomous power supply systems. It has been
shown when it is desirable to use electromechanical
generators to supply autonomous consumers. The
types of structural solutions and the choice of the
basic functional elements of combined power
systems will increase the efficiency of their design
In the article questions of forecasting of publication
activity and a problem of planning of actions on
management of publicity activity of scientific
collective are considered
In this article, we have presented the study and
implementation of the physical model of
motion of two coupled pendulums with use of
numerical methods. When building the model
we were using the method of Euler solutions of
differential equations, which displays
pendulums visual motion, as well as building
graphics of functions of speed, angle and
acceleration depending on time with high
reliability. We have generated equation of
motion for generalized coordinates for the first
and second mathematical pendulum. The
generated application implements a physical
model of a double mathematical pendulum,
commit sustained oscillations with the ability
to change the basic parameters: deflection
angle, speed, mass and length of the rod in C++
language by programming environment
“Embarcadero RAD Studio”. This application
can be used as a model of a double
mathematical pendulum in the study of
oscillations, as a methodical manual and a
virtual laboratory in physics, informatics and
programming classes – for demonstration,
study and create applications in the objectoriented
C++ programming language
Creation of new types of special electric actuators for the oil and gas industry implies development of new approaches to simulation, design of the considered types of electric actuators. In addition, it requires development of new algorithms for creation of a complex of application programs of computer-aided design of special electric actuators. As process of simulation is quite labor consuming, it is offered to realize it gradually. In this article, the question of mathematical simulation of special electric actuators for the equipment of oil and gas branch using methods of electromagnetic conversion of energy is considered. Results of mathematical simulation were realized in the form of the program products, which are a part of system of computer-aided design
The typical scheme of sugar beet processing, used at
most sugar beet factories in Russia has not been
fundamentally changed for several dozens of years. As
a result, the performance indicators of domestic beetprocessing
enterprises are below the world average.
The article considers the technology of two-stage
extraction and subsequent lime-carbon dioxide raw
juice purification with the separation of the preliming
sludge and carrying out the carbonation treatment in
one step. The theoretical foundations of a two-stage
extraction of sucrose from sugar beet cossettes are
described and the main criteria for its implementation
are given. The chemistry of calcium compounds upon
activation of a suspension of saturation precipitation,
returned to a progressive preliminary defecation, is
shown. On that the increasing of sedimentationfiltration
properties of the preliming sludge is based
that allows its separation on the existing equipment in
based. The theoretical premises for carrying out
saturation in a homogeneous liquid-liquid environment
are given and practical principles for their realization
are described. The comparative evaluation of existing
and improved sugar beet processing technologies is
carried out. The improved technology makes it
possible to reduce the amount of raw juice while improving its purity, thereby reducing the
consumption of auxiliary materials, fuel and energy
resources, simplifying the technological scheme while
improving the quality of the purified juice, namely, its
higher purity, achieved by reducing the degree of
transition of high-molecular compounds in it and
increasing the effect of destruction of reducing
substances
Currently operating in autonomous systems of power
supply DC voltages power sources are secondary
sources for operation devices, protection and control
of generators, motors, stabilizers and inverters have
relatively low operational performance. The work
proposes to improve the weight and the size of power
supplies to apply a high frequency link in their
designs. We provide structural designs and the
peculiarities of operation of secondary power sources
with a high frequency link. This article discusses the
fundamental electrical circuits of pulse regulators,
converters based on resonant inverters and
transformers with rotating magnetic field. The use of
resonant inverters in power sources will significantly
improve their weight and overall dimensions. In
addition, the use of secondary sources of supply for
transformers with rotating magnetic field will
simplify their design and reduce the level of
electromagnetic interference generated by
semiconductor devices. The features of operation of
pulsed regulators and prospective structuralschematics
converters discussed in the article,
performed on resonant inverters and transformers
with rotating magnetic field, will increase the
effectiveness of pre-work on the development of
secondary power sources with improved operational
and technical characteristics for devices of operating,
control and protection
The use of regenerated oils reduces the
consumption of fresh oils for refilling, while oil
filtration during the operation lengthens their
service life and reduces the consumption of fresh
oils for replacement. To restore waste oils, a variety
of technological operations are used, based on
physical, physicochemical and chemical processes.
They are aimed at treating the oil in order to
remove aging products and pollution from it. The
studies have shown that the most effective means of
recovering the quality of waste oils are small-size
regeneration plants. The main difficulty in creating
small-sized regeneration plants is the selection of a
sufficiently effective, environmentally safe and
economically justified method for the regeneration
of waste oils, as well as its hardware design. This
work is aimed at creating an efficient centrifugal
cleaner
The article examines the issues of increasing the efficiency of the system of technical operation of mobile agricultural machinery by means of monitoring the state of units and aggregates of the latter through diagnostics. The problems of complex diagnostics of diesel fuel equipment are investigated. The urgency of diagnosing a fuel injection pump without dismantling from the engine is shown from technical, economic and environmental points of view. The effect of operational malfunctions of some devices of fuel equipment on parameters of its operation as a whole is analyzed. On the basis of the analysis of diagnostic devices application, their grouping is suggested. The parameters to be studied in connection with peculiarities to decide whether it is possible to estimate the technical state of the fuel injection pump without dismantling from the internal combustion engine are indicated. Based on peculiarities of the fuel injection pump technical state estimation, a research program is developed and the results of the research are presented. Specific features of testing the fuel injection pump are indicated. Analysis of the results of the research shows that a smaller error in the change of the cyclic fuel feed rates supplied by the fuel injection sections takes place at the engine speed corresponding to the indicated power. The conclusion is made that the presented research results can be used as a basis for developing a technique (technology) for diagnosing the fuel injection pump without dismantling from the internal combustion engine
The article is devoted to the analysis of the use of
large data processing technology in information
systems of territorially distributed complexes
Technologies of fruits storing known at the present
time, solving actual problems – slowing down
biochemical processes, inhibiting ethylene synthesis,
do not provide fully the preservation of quality of
fruits due to not taking into consideration the
peculiarities of microflora of fruits and
microbiological processes, taking place during storage.
Purpose of the research: investigation of influence of
complex treatment of fruits with electromagnetic fields
of extremely low frequency (ELF EMF) and the biopreparation
“Vitaplan” on changing of losses of
biologically active substances in the process of longterm
storage. Objects of the research: apples of the
Idared variety and pears of the Conference variety,
regionalized in the Krasnodar region. Mass shares of
the vitamin C and P-active substances were measured in the process of storing. ELF EMF treatment was
conducted on an experimental installation. Fruits were
exposed to the action of electromagnetic fields with
specified parameters. Complex treatment of fruits
(apples and pears) with ELF EMF and the biopreparation
“Vitaplan” before dispatching for storage
allows preserving the biologically active substances –
the vitamin C and P-active substances – to the
maximum degree. Synergetic effect, appearing due to
the complex action of electromagnetic field and the
bio-preparation, allows decreasing the processing time
in the electromagnetic field