Issue №: 2(101)
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.
MATHEMATICAL MODELING OF TECHNOLOGICAL MODES OF HEAT-PUMPING SYSTEMS FOR TECHNOLOGICAL PROCESSES
Kotov Boris - Doctor of Technical Sciences, Professor of the Department of Agroengineering and Systems Engineering of Podolsk State Agrarian and Technical University (Shevchenko St., 13, Kamenets-Podolsky, 32316, e-mail: eetsapk@pdatu.edu.ua).
Grishchenko Vladimir - Candidate of Technical Sciences, Senior Lecturer of the Department of Automation and Robotic Systems. acad. I.I. Martynenko of the National University of Bioresources and Nature Management of Ukraine (15 Heroes Oborony st., Kiev, 03041, e-mail: bepeck2001@rambler.ru, https://orcid.org/0000-0001-7789-3650).
Pantsir Yuriy - Candidate of Technical Sciences, Associate Professor, Dean of the Engineering and Technical Faculty of Podolsk State Agrarian Technical University (Shevchenko St., 13, Kamenets-Podolsky, 32316, e-mail: panziryuriy@gmail.com, https: / /orcid.org/0000-0003-2969-1936).
Garasimchuk Igor - Candidate of Technical Sciences, Associate Professor of the Department of Electrical Engineering, Electromechanics and Electrotechnology of Podolsk State Agrarian Technical University (Shevchenko St., 13, Kamenets-Podolsky, 32316, e-mail: igorgarasymchuk@gmail.com, https: / / orcid.org/0000-0002-4304-4447).
One of the ways to increase the energy efficiency of the process of heat supply of technological facilities and production facilities of the agro-industrial complex is the use of heat pumps. Their use allows to increase the energy potential of heat carriers. To optimize the mode parameters and create systems for automatic control of the heat pump installation, it is necessary to establish a relationship between the parameters of the processes occurring in the elements of the installation by creating a mathematical model of non-stationary thermal modes.
In the analysis of recent studies and publications, it is established that the calculations of processes in heat pumps are presented mainly for stationary modes of operation without taking into account the dynamics of the condenser. If the dynamic modes of individual elements are given, then they are described by mathematical models of considerable complexity, which greatly complicates their practical implementation.
In the article, the heat pump installation, as an object of modeling, is considered as a physical system, which consists of four series-connected elements: evaporator, condenser, compressor, throttle valve forming a closed circuit. The principle of operation of a simple heat pump installation is explained by the scheme and schedule of the theoretical cycle of the steam compressor heat pump. To simplify the mathematical model, certain assumptions were made: the change in the parameters of liquid, vapor and air varies in a straight line, the thermophysical characteristics of the material of heat exchangers, air and vapor flows, heat transfer coefficients do not depend on temperature and are average for the cycle.
On the basis of thermal and material balance the corresponding differential equations which make mathematical model of dynamics of change of parameters of the heat exchanger have been made. The mathematical model is supplemented by a simulation model in the MatLAB / Simulink computer environment, as well as graphical interpretations of dynamic characteristics.
The developed mathematical model of dynamics of thermal processes in the heat pump installation can be used for calculation of parameters of heating and cooling of streams of heat carriers and creation of system of automatic control of them.
1. Morozjuk T.V. (2006) Teorija holodil'nyh mashin i teplovyh nasosov [Theory of refrigerators and heat pumps]. Odessa: Negotsiant, 712. [in Russian].
2. Sniezhkin Yu.F., Chalaiev D.M., Shavryn V.S., Dabizha N.O. (2008) Teplovi nasosy v systemi teplokholodopostachannia [Heat pumps in the heat and cold supply system]. Kyiv: Poligraf-Service LLC. 104. [in Ukrainian].
3. Amerkhanov R.A. (2003) Optimizatsiya sel’skokhozyaystvennykh energeticheskikh ustanovok s ispol’zovaniyem vozobnovlyayemykh vidov energii [Optimization of agricultural power plants using renewable energy]. Moscow: Kolos, 532. [in Russian].
4. Pleshka M.S., Vyrlan P.M., Stratan F.I., Bulkin S.G. (1990) Teplonasosnyye geliosistemy otopleniya i goryachego vodosnabzheniya zdaniy [Heat pump heliosystems heating and hot water supply of buildings]. Ed. Stratana F.I. Kishinev: Shtiintsa, 119. [in Russian].
5. Chaychenets N.S. (1990) Teplonasosnyye sushil’nyye ustanovki dlya predpriyatiy agropromyshlennogo kompleksa (teoriya i tekhnika) [Heat pump drying installations for enterprises of the agro-industrial complex (theory and technology)]. Abstract of thesis doctors of technical sciences: 05.18.12. Moscow, 51. [in Russian].
6. Sniezhkin Yu.F., Paziuk V.M., Petrova Zh.O., Chalaiev D.M. (2012) Teplonasosna zernosusharka dlia nasinnievoho zerna [Heat pump grain dryer for seed grain]. Kyiv: Poligraf-Service LLC, 154. [in Ukrainian].
7. Holub H.A., Kepko O.I. (2002) Matematychna model teplonasosnoi systemy teplopostachannia sporud zakrytoho gruntu [Mathematical model of heat pump system of heat supply of closed ground structures]. Bulletin of Kharkiv State Technical University of Agriculture, 10. 275–278. [in Ukrainian].
8. Chaychenets N.S., Ginzburg A.S., Mambetkulov E.B., Chaychenets S.S. (1992) Matematicheskoye modelirovaniye protsessov v teplonasosnoy sushil’noy ustanovke s solnechnym kollektorom [Mathematical modeling of processes in a heat pump drying installation with a solar collector]. Theoretical foundations of chemical technology. 26(5). 725–731. [in Russian].
9. Hryshchenko V.O. (2018) Typovi tekhnolohichni protsesy i kholodylne obladnannia dlia zberihannia roslynnoi produktsii: modeliuvannia, dynamichni rezhymy, keruvannia [Typical technological processes and refrigeration equipment for storage of plant products: modeling, dynamic modes, control]. Kyiv: TsP COMPRINT, 248. [in Ukrainian].
10. Hryshchenko V.O. (2021) Osoblyvosti vykorystannia teplonasosnykh system utylizatsii teplovykh vykydiv vyrobnychykh prymishchen APV [Features of use of heat pump systems of utilization of thermal emissions of production premises of APV]. Obukhov readings: XYI International scientific-practical conference. 50–51 [in Ukrainian].
About the journal
The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine
(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)
Old version of the site: http://vibrojournal.vsau.edu.ua/
The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:
The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University
The journal is devoted to highlighting current issues in engineering, mechanical engineering, and technological processes, including the study of dynamic and oscillatory phenomena in technical systems, the application of mathematical methods for process modeling and analysis, as well as the presentation of results of design-engineering and technological developments. Particular attention is given to the study of vibration processes and their application in modern technologies.
The purpose of the scientific journal “Vibrations in Engineering and Technologies” is to disseminate the results of fundamental and applied research in the field of engineering sciences aimed at developing theoretical foundations and practical approaches to the design, analysis, and improvement of machines, materials, and technological processes, including the use of vibration and oscillatory effects in various sectors of production.
The publication is focused on the formation of a modern scientific and informational environment for the effective exchange of research results, support of innovative development, and implementation of advanced technical solutions in industry, agro-industrial production, and related fields.
The journal promotes the development of interdisciplinary research, the integration of modern engineering approaches, and the enhancement of the efficiency of technological processes and technical systems, including through the rational use of vibration phenomena.
Objectives of the Scientific Journal
To achieve its stated purpose, the journal addresses the following key objectives:
dissemination of results of fundamental and applied scientific research in the fields of mechanics, mechanical engineering, technological processes, machine dynamics, and equipment, as well as in areas related to the application of vibration phenomena in engineering and technologies;
promotion of research aimed at the creation and improvement of machines, mechanisms, and technological equipment based on oscillatory and vibration processes;
support for the implementation of modern technological solutions focused on improving productivity, energy efficiency, and reliability of technical systems;
обеспечение scientific exchange of research results among research institutions, higher education establishments, and industrial enterprises;
development of interdisciplinary cooperation among researchers in the fields of mechanics, materials science, material processing technologies, and automation of technological processes;
dissemination of modern scientific achievements and advanced technologies related to the application of vibration processes in production and technical systems.
Publisher Vinnytsia National Agrarian University
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 119 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Ihor Kupchuk, Candidate of Technical Sciences, Associate professor, Associate Professor of the Department of Engineering Mechanics and Technological Processes in the Agricultural Industry Faculty of Engineering and Technology Vinnytsia National Agrarian University 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.
