There are the results of the research on creating a heat
exchanger. It is based on the experience of creating
equipment for swirling of liquid and gas flows and
changing of their directions, their whirling, leading to
destruction of the boundary layer on heat-transfer
surfaces and intensification of heat-exchange
processes. Screw rotors are suggested as working
bodies of the heat exchanger. Each flow-cross section
in them differs from the previous not only by its form
but also by its location relative to each other. With
that, the cross-section area changes, the medium
motion stationary breaks, the intensity of heatexchange
processes increases, technological
capabilities enhance. Screw rotors are supplied with
laps created on exterior surfaces of rotors during their
assembling and allowing intensification of heatexchange
processes. Dependencies for calculating of
screw rotors basic characteristics are presented in the
work. Screw rotors provided with helical grooves on
the inner surface with a spiral lines on the outer surface
of different pitch and number of visits. The work is
done on the basis of research carried out at the Kuban
state agrarian University on the use of helical rotors in
industry, construction and agriculture [1-23]
On the basis of the analysis of existing technical means for tillage in this article we propose a new technical means of vibration action including rectangular welded rack with hinge systems, adjusting the depth of tillage. Fixing of the working bodies and working bodies are made in the form of racks with chisels and arrow-shaped claws differ in that there is a shaped hole is made in the upper side of rack where a mounted solenoid is. It is mounted on a rack by means of casing and screws, and the solenoid is made in the form of a coil with a head and spring and communicated with the electrical system of the tractor via the relay-breaker and a regulator are located on the rack. This vibrating tool presumably will lessen the resistance of the soil affecting on the working bodies, will eliminate the sticking effect of elements of working bodies and thereby the quality of the soil tillage will be improved, it will allow to reduce energy consumptions of working process up to 30%, it reduces the emission of harmful substances from combustion of diesel fuel into the atmosphere. The invention relates to agricultural engineering and can be used for tillage on various agricultural backgrounds and with different densities
It is known that today one of the promising areas to effectively solve issues of energy saving, is the introduction of renewable energy sources. Despite the fact that the current solar PV stations have the main drawback associated with the high cost, the prospects of their application in autonomous systems of electrosupply are evident when they are used in combined (hybrid) systems. In such systems there may be other types of renewable and traditional sources of electricity. In addition, they produce heat. We have disclosed prospects of solar industry, and also, for solar energy assessment, we have examined analytical expressions allowing defining the energy derived from solar radiation for specific surfaces. Calculations start from obtaining statistical data gathered at meteorological stations which keeps records of the intensity of the total (direct plus diffuse) radiation on a horizontal surface, and the intensity of direct solar radiation. The article presents features of the calculation taking into account the climatic and territorial conditions on the example of the Krasnodar region. The given calculation procedure is the first stage for designing solar power plants. Further, the total capacity is determined by electricity consumers, as well as the quality requirements of electricity, including continuity of supply, embarking to the construction of the block diagram electricity supply. In this scheme, we must provide primary and backup power sources. It selects the main equipment of solar power plant (solar panels, inverters, storage batteries)
The article considers the main types of wind and
solar electric installations, and provides a
comparative analysis of the renewable energy
potential of the Krasnodar region. Currently, people
of the Earth cannot live without electricity.
Production and consumption of electricity is
constantly increasing, and the cost of it is
constantly becoming more expensive. The cost of
oil production (cost to get oil out of the ground)
increases constantly. The cost of electricity is going
up because the cost of basic materials, such as
copper, is at an unprecedented high level. Such
alternative energy sources, such as solar and wind,
are real solutions to these problems, moreover, the
cost of "traditional" energy sources will only
increase. To date, the most popular and invest
renewable energy sources are the solar and wind
power. Solar energy in the Krasnodar region is
more profitable than wind one, despite the fact that
the production of solar installations is more
expensive. But every year the price of solar energy
is reduced and soon will be equal to the price of
wind energy, and science and technology do not
stand still, so when there is such an abundance of
sunlight in the Krasnodar region, the solar
installation will pay off much faster
The article discusses the features of design and
operation in the different modes of functioning of
autonomous hybrid power plants based on renewable
and traditional energy sources. We have given a
structural scheme of such a plant. It is shown that the
algorithm of the system in the autumn-winter period
should be adjusted according to the monthly
monitoring; and standby generator of independent
source can be run at a deeper discharge of batteries. It
is known that the most expensive and the weakest link
in the solar PV plants is rechargeable battery. In
addition, the larger the number they have in the
system, the more complicated the fulfillment of all
conditions of proper operation is. We have proposed
to extend the lifetime of batteries through the use of
passive balancing, which allows to increase the
reliability of operation and reduce the cost. It is
shown that a real possibility of improving the
technical and economic performance of autonomous
hybrid power plants is their execution on the basis of
solar photovoltaic power plants. We have also
discussed the features of construction and operation
of hybrid power plants, which will increase the
efficiency of preliminary works on development of
high-performance structural circuit design of the
stations
The high speed of solar energy development in the
modern world allows us to assert that in the near
future it will become one of the main sources of
electricity. The authors describe a classification of
solar power plants, which can be of two types –
thermodynamic and photovoltaic, as well as the
features of design and operation of these plants. There
is a structural and schematic solution of autonomous
solar power stations and ones operating in parallel
with the external power grid. The features of their
design and operation, including the main advantages
and disadvantages were shown. It is shown that to
improve the reliability, including uninterrupted power
supply, a promising direction is the development of
combined systems which in addition to the solar
power plant may use wind power, gas or diesel
power, etc. In addition, such stations may provide
power from the external power supply. We have
given one of the variants of structural designs of
combined systems of energy and disclosed
recommendations for the design of energy-efficient
combined systems of power supply, made using
renewable and conventional sources of electricity.
The final version of the combined system of
electricity supply and the degree of participation of
traditional and renewable energy sources in electricity
production is determined on the basis of the analysis
of the energy balance and electromagnetic
compatibility of the main functional elements of the
system
The article discusses the structural schematics of solar
energy systems, providing guaranteed power supply
to electricity consumers with priority for consumers
of the 1st category. The work describes main
functions performed by modern energy systems. It is
shown that nowadays solar power systems of
uninterruptable power supply are classified into three
types: independent; hybrid (combined); intellectual.
We have given the structural scheme of solar systems
power systems of uninterruptable power supply and
the features of their work. The article describes a
monitoring system, carrying out functions of control
and measurement of parameters of the power system
depends on its performance. The economic
performance of a solar power system has been
influenced essentially by the cost of solar and
accumulator batteries. The principal technical
characteristics of modern solar and regular batteries
of the best companies were compared. We have also
given recommendations for improving the operational
characteristics of solar energy systems of guaranteed
power supply, in which special attention is paid to
technical characteristics of the main functional
elements of the system, including electromagnetic
compatibility
Groundwater is the source of drinking water in rural areas, it is a part of urban water and it is formed due to the filtering of cross waters in a stratified medium permeable rocks. The impact of anthropogenic factors leads to changes in the qualitative composition of groundwater. The article presents the results of industrial environmental monitoring of ground water refinery of Tuapse in the period from 2012 to 2016 according to its content of ammonium-nitrogen, nitrate-ions, sulphates, formaldehyde, toluene, xylene and ethylbenzene. Analysis of groundwater sampled from wells located at the site of the refinery was conducted by a factory-certified laboratory. The content of the components meet the regulatory indicators. We examine the effects of industrial toxicants on the human body
Rational and efficient use of natural resources is an important element of sustainable development. Waste is a significant loss of material and energy resources. Recycling and disposal of waste can be a cause of pollution, harmful substances and infections on people. Index of waste production is closely linked to the level of economic activity in the country and sums up the structures of production and consumption that are formed in the society. Reduction of capacity size of waste production is a measure of promotion of the economy sector to less material-intensive structures of production and consumption. Phytogenic wastes are mostly formed in the timber industry, and also are pollutant source of environment. Continuing production and accumulation of waste is a serious environmental problem. The main reason for these circumstances involves insufficiency of power in added-value wood processing, that increase the problem of integrated utilization of low-grade wood, small wood and demolition wood. As a result, the main competitive products in the timber complex of the Krasnoyarsk Territory are industrial wood and roundwood. Solution to these topical issues of optimum use of the resulting waste in the Krasnoyarsk Territory needs to be solved with the help of mathematical modeling of process optimization of recycling lumpy plant waste. Rational use of lump plant waste is one of the most serious and, unfortunately, unresolved problem
The analysis of scientific research in the field of food technologies has shown that mathematical modeling is applied in the following directions: adjustment of the modes of technological processes, development of compounding and quality evaluation of ready-made products, and also prediction of shelf life of new products during launching. Models of variance and regression analysis with application of methods of mathematical planning of experiment are most relevant in describing the processes of food production. The article contains the results of our own research about creating composition of fish preserves made of combined minced of fishes, bad-ripening and ripening in salting. The mathematical models of the dependence of organoleptic, structural-mechanical characteristics and characteristics of ripening of preserves on technological factors are presented. The dimensionless generalized index of quality was modeled and the composition of minced was optimized on the basis of its dynamics. It was established, that preserves which contain 42% herring Atlantic and 4,8% salt, have the best organoleptic, structural-mechanical and ripening characteristics. The regression model was developed, which determines the shelf life of wide range of fish preserves, depending on factors affecting it: storage temperature, acidity of the fill, proteolytic activity of the enzyme system of muscle tissue and also the speed of fish ripening, caused by addition of various functional and technological additives. Testing of the model shown, that calculated data of the shelf life of fish preserves correlate with the data obtained experimentally