Pub Date : 2019-06-25DOI: 10.32347/2409-2606.2019.29.14-26
V. Mileikovskyi
{"title":"Analytical description of the expansion of wall jets of different curvature","authors":"V. Mileikovskyi","doi":"10.32347/2409-2606.2019.29.14-26","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.29.14-26","url":null,"abstract":"","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77936575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-06-25DOI: 10.32347/2409-2606.2019.29.6-11
Volodymyr Dovhaliuk, Y. Chоvniuk, E. Ivanov, Anna Sytnytska
To identify climatic parameters of museum premises there are models of different types depending on the goals of the research : m odification of the algorithm of the microclimate control, the performance of air conditioners, the parameters of the inflow air or selection of air distribution system. The difficulty in choosing a model is due to the complexity of the behaviour of microclimate formation systems at different moments of time, with the change in the intensity of heat-mass transfer processes in museum premises. Using the example of the air merry-go-round of E. Lorenz, the use of fractal modelling is shown to describe the behaviour of the above systems as numerically invariant systems. Here is given an algorithm for determination of the region of self-similarity for the investigated object, which, according to the authors, may reduce the probability of a violation of the regular conditions of its operation. In the article there are possibilities of using fractal models for identifying the parameters of the systems of providing the microclimate in museum premises. The ways of identifying complex systems using fractal formalism are suggested, which can be further used to improve the existing systems of formation the artificial microclimate in museum premises on the basis of the operation of microcontrollers with fuzzy logic. It is established that there is a need to provide a system that promptly sends a signal about an increase in the probability of an unusual situation (excessive humidity, high temperature in the area where the paintings are located). To do this, it is necessary to determine one of the boundaries of the region of self-similarity of the air parameters when entering the air flow into the service area (the location of the exhibit), and the second boundary of the region of self-similarity at the outflow of air flow from the service area.
{"title":"The Possibility of Using a Fractal Model to Identify Climatic Parameters of Museum Premises","authors":"Volodymyr Dovhaliuk, Y. Chоvniuk, E. Ivanov, Anna Sytnytska","doi":"10.32347/2409-2606.2019.29.6-11","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.29.6-11","url":null,"abstract":"To identify climatic parameters of museum premises there are models of different types depending on the goals of the research : m odification of the algorithm of the microclimate control, the performance of air conditioners, the parameters of the inflow air or selection of air distribution system. The difficulty in choosing a model is due to the complexity of the behaviour of microclimate formation systems at different moments of time, with the change in the intensity of heat-mass transfer processes in museum premises. Using the example of the air merry-go-round of E. Lorenz, the use of fractal modelling is shown to describe the behaviour of the above systems as numerically invariant systems. Here is given an algorithm for determination of the region of self-similarity for the investigated object, which, according to the authors, may reduce the probability of a violation of the regular conditions of its operation. In the article there are possibilities of using fractal models for identifying the parameters of the systems of providing the microclimate in museum premises. The ways of identifying complex systems using fractal formalism are suggested, which can be further used to improve the existing systems of formation the artificial microclimate in museum premises on the basis of the operation of microcontrollers with fuzzy logic. It is established that there is a need to provide a system that promptly sends a signal about an increase in the probability of an unusual situation (excessive humidity, high temperature in the area where the paintings are located). To do this, it is necessary to determine one of the boundaries of the region of self-similarity of the air parameters when entering the air flow into the service area (the location of the exhibit), and the second boundary of the region of self-similarity at the outflow of air flow from the service area.","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76729965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-06-25DOI: 10.32347/2409-2606.2019.29.38-42
P. Kapalo, O. Vozniak, Yurii Yurkevych, Khrystyna Myroniuk
This paper presents the documentary part of the study of the effect of human physical activity on the microclimate of the premises. In gyms, ventilation requirements are higher than in conventional living quarters. Today, a lot of attention is paid to a healthy lifestyle. In cities where the environment is polluted with exhaust gases of vehicles, it is not recommended to go in for sports in urban parks. For this reason, a variety of simulators, including cycling, are used. When using simulators, indoor air quality deteriorates. The purpose of the study is to determine the amount of pollutants released in the room by means of experimental measurements and calculations, as well as determination of the required air exchange on the basis of the determined quantities. Such low quality of the internal environment can cause a decrease in human productivity, drowsiness, fatigue, and may also be the cause of various diseases. In this paper, an experimental measurement is documented, during which various motor activities of one person took place – sedentary administrative activity and exercise bike. Experimental measurements took place in two stages in winter. On the basis of the measured internal air parameters, the required airflow is calculated for both cases. Measured indoor air parameters (temperature, relative humidity and carbon dioxide concentration) are documented in figure. Estimates can be used to select equipment for conditioning in gyms. On the basis of experimental measurements, we argue that the CO2 concentration increases by 3.2 times in the case of a stationary exercise bike compared to sitting work. However, atmospheric air (m / year) – 5 times more.
{"title":"Ensuring Room Air Exchange for Exercises","authors":"P. Kapalo, O. Vozniak, Yurii Yurkevych, Khrystyna Myroniuk","doi":"10.32347/2409-2606.2019.29.38-42","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.29.38-42","url":null,"abstract":"This paper presents the documentary part of the study of the effect of human physical activity on the microclimate of the premises. In gyms, ventilation requirements are higher than in conventional living quarters. Today, a lot of attention is paid to a healthy lifestyle. In cities where the environment is polluted with exhaust gases of vehicles, it is not recommended to go in for sports in urban parks. For this reason, a variety of simulators, including cycling, are used. When using simulators, indoor air quality deteriorates. The purpose of the study is to determine the amount of pollutants released in the room by means of experimental measurements and calculations, as well as determination of the required air exchange on the basis of the determined quantities. Such low quality of the internal environment can cause a decrease in human productivity, drowsiness, fatigue, and may also be the cause of various diseases. In this paper, an experimental measurement is documented, during which various motor activities of one person took place – sedentary administrative activity and exercise bike. Experimental measurements took place in two stages in winter. On the basis of the measured internal air parameters, the required airflow is calculated for both cases. Measured indoor air parameters (temperature, relative humidity and carbon dioxide concentration) are documented in figure. Estimates can be used to select equipment for conditioning in gyms. On the basis of experimental measurements, we argue that the CO2 concentration increases by 3.2 times in the case of a stationary exercise bike compared to sitting work. However, atmospheric air (m / year) – 5 times more.","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83636066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-06-25DOI: 10.32347/2409-2606.2019.29.28-35
Georgii Ratushniak, O. Lyalyuk, Dmytro Shpita
Heat pumps are one of the ef fective ways for increasing the energy efficiency of heat supply. Prediction of the technical state of heat pumps is necessary for uninterruptible heat supply of the consumers. In order to create an expert-modelling system for multifactorial analysis of the process of accumulation of influencing factors for the technical state of a heat pump, a mathematical apparatus based on the theory of fuzzy logic and a linguistic variable was used. This method gives an interconnected set of mathematical models, which allows using expert-linguistic information to predict the technical condition of the heat pump, depending on the factors that determine it. The functions of membership of fuzzy estimations of the factors influence on the predicted technical condition of the heat pump are constructed. The tree of the logical conclusion of the hierarchical relations of factors that may influence the state of the heat pump is developed. An assessment was made of the levels of linguistic variables that establish the relationship between factors affecting the technical state of heat pumps using the term-set system. Fuzzy matrices of knowledge were also built on the basis of the introduced qualitative terms, and linguistic statements were made, which correspond to the system of fuzzy logic equations that characterize the surface of the variables belonging to the corresponding terms. The methodology of complex factors for the expert of the project on the assessment of the technical condition of the heat pump is presented, which enables to obtain the appropriate management decisions taking into account quantitative and qualitative excitatory factors that influence the reliability and durability of the operation of the heat pump. In the future, the field tests will be conducted, which allow confirmation of the fuzzy logic model of the heat pump state
{"title":"Modeling the Reliability of the Technical State of a Thermal Pump Installation Using a System of Fuzzy Logical Equations of Linguistic Variables","authors":"Georgii Ratushniak, O. Lyalyuk, Dmytro Shpita","doi":"10.32347/2409-2606.2019.29.28-35","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.29.28-35","url":null,"abstract":"Heat pumps are one of the ef fective ways for increasing the energy efficiency of heat supply. Prediction of the technical state of heat pumps is necessary for uninterruptible heat supply of the consumers. In order to create an expert-modelling system for multifactorial analysis of the process of accumulation of influencing factors for the technical state of a heat pump, a mathematical apparatus based on the theory of fuzzy logic and a linguistic variable was used. This method gives an interconnected set of mathematical models, which allows using expert-linguistic information to predict the technical condition of the heat pump, depending on the factors that determine it. The functions of membership of fuzzy estimations of the factors influence on the predicted technical condition of the heat pump are constructed. The tree of the logical conclusion of the hierarchical relations of factors that may influence the state of the heat pump is developed. An assessment was made of the levels of linguistic variables that establish the relationship between factors affecting the technical state of heat pumps using the term-set system. Fuzzy matrices of knowledge were also built on the basis of the introduced qualitative terms, and linguistic statements were made, which correspond to the system of fuzzy logic equations that characterize the surface of the variables belonging to the corresponding terms. The methodology of complex factors for the expert of the project on the assessment of the technical condition of the heat pump is presented, which enables to obtain the appropriate management decisions taking into account quantitative and qualitative excitatory factors that influence the reliability and durability of the operation of the heat pump. In the future, the field tests will be conducted, which allow confirmation of the fuzzy logic model of the heat pump state","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"210 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77435852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-06-25DOI: 10.32347/2409-2606.2019.29.43-49
V. Nalyvaiko, V. Konovaliuk
{"title":"Investigation of the Efficiency of the Application of Water Solution of Lexol Reagent for Preparation of Pulling","authors":"V. Nalyvaiko, V. Konovaliuk","doi":"10.32347/2409-2606.2019.29.43-49","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.29.43-49","url":null,"abstract":"","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76876955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.32347/2409-2606.2019.28.28-35
V. Mileikovskyi, T. Tkachenko, Volodymyr Dziubеnkо
{"title":"An Analytical Description of the Expansion of Plane Wall Jets","authors":"V. Mileikovskyi, T. Tkachenko, Volodymyr Dziubеnkо","doi":"10.32347/2409-2606.2019.28.28-35","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.28.28-35","url":null,"abstract":"","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"45 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79674259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.32347/2409-2606.2019.28.48-52
S. Protsenko, M. Kizeev, O. Novytska
{"title":"Development of Methodology of Thermal Energy Distribution on Heating Between Consumers of The Multi-Apartment Building","authors":"S. Protsenko, M. Kizeev, O. Novytska","doi":"10.32347/2409-2606.2019.28.48-52","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.28.48-52","url":null,"abstract":"","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83954098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.32347/2409-2606.2019.28.17-27
O. Zadoiannyi, Oleksandr Тоvstоhrаi
{"title":"Comparative Exergy Analysis of Microclimate Support Devices in Office Premises","authors":"O. Zadoiannyi, Oleksandr Тоvstоhrаi","doi":"10.32347/2409-2606.2019.28.17-27","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.28.17-27","url":null,"abstract":"","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88025764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.32347/2409-2606.2019.28.6-16
Volodymyr Dovhaliuk, Y. Chоvniuk, M. Shyshyna
The fractal analysis of long-term series of parameters of colloidal capillary-porous bodies in conditions of heat and mass transfer to the environment and the resulting deformation process are presented. A fractal estimation of relevant statistical information on the moisture content, temperature and deformation of the above bodies is carried out. The algorithm for calculating the Hurst exponent is based on the R/S analysis. On the basis of the methodology for pre-predictive fractal analysis of time series (based on the sequential R/S analysis), the level of persistence is determined and the parameters (average values) of aperiodic cycles of time series are calculated. Based on smoothing of V-statistics using the ordinary moving averages and Kaufman’s adaptive moving average, the criterion for determining the average length of periodic and aperiodic cycles is proposed. The procedure of qualitative analysis of time series for which the hypothesis about the presence of a trend is not confirmed, using methods of nonlinear dynamics and chaos theory is also proposed. The real time series representative of the heat and mass transfer parameters (temperature, moisture content), stress and deformation in colloidal capillary-porous bodies (model of artistic paintings) involved in convective heat and mass transfer to their environment (premises where the museum exhibition is located) are examined; the latter also includes the artificial climate systems for museum premises and the museum visitors flow being present in this area at this time. Tuckens’s theorem is the support for such studies. The chaotic nature of the dynamical system under study, as prescribed by the time realizations, is determined with Liapunov exponent. The estimation of the persistence was evaluated using Hausdorff fractal dimension and fractal index. The visual estimation of time series was carried out using procedure for the reconstruction of phase trajectories. As a result of the phase area’s phase points analysis, a split attractor is discovered allowing to suppose its bifurcation.
{"title":"Analysis of Heat And Mass Transfer and Deformation of Colloid Capillary-Porous Bodies Processes by Fractal Analysis and Discrete Nonlinear Dynamics Methods","authors":"Volodymyr Dovhaliuk, Y. Chоvniuk, M. Shyshyna","doi":"10.32347/2409-2606.2019.28.6-16","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.28.6-16","url":null,"abstract":"The fractal analysis of long-term series of parameters of colloidal capillary-porous bodies in conditions of heat and mass transfer to the environment and the resulting deformation process are presented. A fractal estimation of relevant statistical information on the moisture content, temperature and deformation of the above bodies is carried out. The algorithm for calculating the Hurst exponent is based on the R/S analysis. On the basis of the methodology for pre-predictive fractal analysis of time series (based on the sequential R/S analysis), the level of persistence is determined and the parameters (average values) of aperiodic cycles of time series are calculated. Based on smoothing of V-statistics using the ordinary moving averages and Kaufman’s adaptive moving average, the criterion for determining the average length of periodic and aperiodic cycles is proposed. The procedure of qualitative analysis of time series for which the hypothesis about the presence of a trend is not confirmed, using methods of nonlinear dynamics and chaos theory is also proposed. The real time series representative of the heat and mass transfer parameters (temperature, moisture content), stress and deformation in colloidal capillary-porous bodies (model of artistic paintings) involved in convective heat and mass transfer to their environment (premises where the museum exhibition is located) are examined; the latter also includes the artificial climate systems for museum premises and the museum visitors flow being present in this area at this time. Tuckens’s theorem is the support for such studies. The chaotic nature of the dynamical system under study, as prescribed by the time realizations, is determined with Liapunov exponent. The estimation of the persistence was evaluated using Hausdorff fractal dimension and fractal index. The visual estimation of time series was carried out using procedure for the reconstruction of phase trajectories. As a result of the phase area’s phase points analysis, a split attractor is discovered allowing to suppose its bifurcation.","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78651666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.32347/2409-2606.2019.28.53-58
Vitalii Denhub, V. Konovaliuk
{"title":"Experimental Research of the Exergy Efficiency of Water Heat Networks and Heating Systems","authors":"Vitalii Denhub, V. Konovaliuk","doi":"10.32347/2409-2606.2019.28.53-58","DOIUrl":"https://doi.org/10.32347/2409-2606.2019.28.53-58","url":null,"abstract":"","PeriodicalId":23499,"journal":{"name":"Ventilation, Illumination and Heat Gas Supply","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79789898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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