Vibrations in engineering and technology


Issue №: 2(97)

Published: 1970.01.01
DOI: 10.37128/2306-8744-2020-2

The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.

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DOI: 10.37128/2306-8744-2020-2-8
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Spirin Anatoly - candidate of technical sciences, associate professor of the department of general technical disciplines and occupational safety, Vinnytsia National Agrarian University: Vinniytsia, st. Sonyachna 3, VNAU, 21008, e-mail: spirinanatoly16@gmail.com.

Gunko Iryna – candidate of technical sciences, associate professor, Vice-President of the Training, Research and Production Complex «All-Ukrainian Scientific-Training Consortium» Vinnytsia National Agrarian University: Vinniytsia, st. Sonyachna 3, VNAU, 21008, email: irynagunko@vsau.vin.ua.

Tverdokhlib Igor – candidate of technical sciences, associate professor of the department of general technical disciplines and occupational safety, Vinnytsia National Agrarian University: Vinniytsia, st. Sonyachna 3, VNAU, 21008, e-mail: igor_tverdokhlib@yahoo.com.

Vovk Valeriya – assistant of the department of finance, banking and insurance, Vinnytsia National Agrarian University: Vinniytsia, st. Sonyachna 3, VNAU, 21008, e-mail: vvovk_2703@ukr.net.



The article deals with one of the ways to improve the energy situation in agriculture of Ukraine, namely to increase the energy efficiency of solar air heaters through the use of granite heat accumulators.

In the world, in recent years, the share of energy produced by non-traditional sources has been steadily increasing. Unfortunately, in Ukraine this proportion is much smaller than in the first world countries. This problem is especially relevant for agriculture. The main renewable energy sources for Ukraine's agricultural sector are biofuels (solid, liquid, gaseous), wind and solar. The latter is the most attractive for widespread use in agriculture. After all, for the production of biofuels requires at least land, mechanization and chemistry, etc., for the production of wind energy requires appropriate weather conditions that are not available in most regions of the country. And only solar energy is everywhere and almost always. The difficulty of using solar energy at night is one of the main constraints on the widespread use of solar installations. The use of heat accumulators (in devices that accumulate heat during the day and give it away at night for production purposes) for solar heaters greatly enhances their technological capabilities. Battery material is a variety of materials - from soil to plastic water bottles. This article discusses the theoretical justification (confirmed by experimental studies) of the choice of rational size and shape of granite heat accumulator elements.

To simplify the task, it was assumed that the battery element has a spherical shape and its thermophysical characteristics remain constant throughout the process of heating and cooling. As a result of the solution of the differential equation of thermal conductivity for these conditions, the dependence of the liquid temperature distribution depending on the radius and time of heating was obtained. The battery element is fully charged when the liquid temperature in the center and on the surface is equal. The temperature distribution in the middle of the liquid was also determined when cooled. Theoretical calculations were confirmed by experimental studies. To determine the rational parameters of the battery cells, a criterion was proposed, the value of which depends on the ratio of heating and cooling time, heating and cooling temperatures, the location of thermocouples.

As a result of theoretical and experimental studies, it is established that the rational size of the granite element of the heat accumulator is an equivalent diameter of 0.3 m. The use of a heat accumulator of this type allows to evaporate more than 300 kg of moisture, which allows to reduce the hay ventilation period, to reduce nutrient losses.


Keywords: heat accumulator, solar air heater, energy efficiency, equivalent diameter, temperature, heat capacity.

List of references

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About journal

Topics of the journal:

The journal "Vibrations   in engineering  and technology" presents materials on the following issues

• Theory of processes and machines
• Mechanical Engineering and materialprocessing
• Processing and food production

Key information:
ISSN (print): 2306-8744
DOI: 10.37128/2306-8744

The certificateof massmediaState registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University

Kind of publication: journal
Type of publication : Scientific
Publication status: Domestic
Year of founding:
Periodicity: 4 times a year
Extent: 18.75 nominal printed pages
ISSN: 2306-8744 (printed version), (online)
Language of edition  : (mixed languages) Ukrainian, English
The scope of the distribution and the category of readers: national, foreign, teaching staff, scientists, businessmen.
Periodical is included in the list of scientific professional editions of Ukraine approved by the Order of Ministry of Education and Sciences of Ukraine from 21.12.2015 No. 1328.
The journal "Vibrations in engineering and technology" is included in the "Catalogue of periodicals of Ukraine".
Journal subscription can be executed in each post office department.
 Subscription Index is  99720.


Old version of site: http://vibrojournal.vsau.edu.ua/

History of journal:

In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published  94 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Kaletnik H.M  PhD , professor, academician NAAS is the chief editor of the "Vibrations in engineering  and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.