Pub Date : 2023-07-30DOI: 10.31649/2311-1429-2023-1-91-100
V. Serdyuk
The article shows that a large percentage of the housing stock of Ukraine is represented by panel houses of the mass series of construction in the 1960s-1980s, which were built with understated indicators of the normative requirements for the thermal resistance of the enclosing structures.It is shown that the underestimated indicators of the thermal resistance of the building envelope led to excessive energy consumption per m2 of the outdated housing stock, which exceeds the indicators of the EU countries by 2.0-2.5 times. The construction industry accounts for more than 30-40% of all energy sources for the maintenance of outdated housing.The article compares the growth of the thermal resistance of fencing structures in European countries and Ukraine.An important place in the protection of buildings from the influence of atmospheric phenomena of the environment, their increased energy efficiency and giving a modern appearance to outdated objects is occupied by hinged ventilated facades. Prospects for expanding the functional properties of hinged facades are shown, which provide energy generation due to their cladding with solar panels and energy savings during building cooling due to the installation of textile ventilated facades.
{"title":"EXPANSION OF THE FUNCTIONAL PROPERTIES OF HINGES VENTILATED FACADES WHEN INSULATING BUILDINGS","authors":"V. Serdyuk","doi":"10.31649/2311-1429-2023-1-91-100","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-91-100","url":null,"abstract":"The article shows that a large percentage of the housing stock of Ukraine is represented by panel houses of the mass series of construction in the 1960s-1980s, which were built with understated indicators of the normative requirements for the thermal resistance of the enclosing structures.It is shown that the underestimated indicators of the thermal resistance of the building envelope led to excessive energy consumption per m2 of the outdated housing stock, which exceeds the indicators of the EU countries by 2.0-2.5 times. The construction industry accounts for more than 30-40% of all energy sources for the maintenance of outdated housing.The article compares the growth of the thermal resistance of fencing structures in European countries and Ukraine.An important place in the protection of buildings from the influence of atmospheric phenomena of the environment, their increased energy efficiency and giving a modern appearance to outdated objects is occupied by hinged ventilated facades. Prospects for expanding the functional properties of hinged facades are shown, which provide energy generation due to their cladding with solar panels and energy savings during building cooling due to the installation of textile ventilated facades.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114686706","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 : 2023-07-30DOI: 10.31649/2311-1429-2023-1-57-62
O. V. Bereziuk, M. Lemeshev, Vitalii Shyrobokov
Construction and demolition waste can be widely used in construction to obtain such valuable materials: as a filler and binder for the production of concrete, dry building mixes and other building materials, for the production of building materials with protective properties against electromagnetic radiation and static of electricity, for the manufacture of anode earthing devices, etc. Therefore, the determination of the regression dependence describing the dynamics of production volumes of construction and demolition waste in the city of Kyiv to solve the problem of solid industrial waste management is an urgent scientific and technical task. The purpose of the study is to determine with the help of regression analysis of dependence, which describes the dynamics of production volumes of construction and demolition waste in the city of Kyiv to solve the problem of solid industrial waste management. During the study, the method of regression analysis of the results of one-factor experiments and other paired dependencies was used, with the selection of the best type of function from the 16 most common options according to the criterion of the maximum correlation coefficient. The regression was carried out on the basis of linear transformations, which allow to reduce the non-linear dependence to a linear one. The coefficients of the regression equation were determined by the method of least squares using the developed computer program "RegAnalyz", which is protected by a certificate of copyright registration of the work. An adequate regression dependence describing the dynamics of construction and demolition waste generation in the Vinnytsia region was obtained. A graphical dependence was constructed that describes the dynamics of production volumes of construction and demolition waste in the city of Kyiv and allows to visually illustrate this dynamic, to show a sufficient convergence of theoretical and actual results. It was established that in the city of Kyiv during 2015-2019, the mass production of construction and demolition waste grew exponentially.
{"title":"DYNAMICS OF THE PRODUCTION VOLUME OF CONSTRUCTION AND DEMOLITION WASTE IN THE CITY OF KIEV","authors":"O. V. Bereziuk, M. Lemeshev, Vitalii Shyrobokov","doi":"10.31649/2311-1429-2023-1-57-62","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-57-62","url":null,"abstract":"Construction and demolition waste can be widely used in construction to obtain such valuable materials: as a filler and binder for the production of concrete, dry building mixes and other building materials, for the production of building materials with protective properties against electromagnetic radiation and static of electricity, for the manufacture of anode earthing devices, etc. Therefore, the determination of the regression dependence describing the dynamics of production volumes of construction and demolition waste in the city of Kyiv to solve the problem of solid industrial waste management is an urgent scientific and technical task. The purpose of the study is to determine with the help of regression analysis of dependence, which describes the dynamics of production volumes of construction and demolition waste in the city of Kyiv to solve the problem of solid industrial waste management. During the study, the method of regression analysis of the results of one-factor experiments and other paired dependencies was used, with the selection of the best type of function from the 16 most common options according to the criterion of the maximum correlation coefficient. The regression was carried out on the basis of linear transformations, which allow to reduce the non-linear dependence to a linear one. The coefficients of the regression equation were determined by the method of least squares using the developed computer program \"RegAnalyz\", which is protected by a certificate of copyright registration of the work. An adequate regression dependence describing the dynamics of construction and demolition waste generation in the Vinnytsia region was obtained. A graphical dependence was constructed that describes the dynamics of production volumes of construction and demolition waste in the city of Kyiv and allows to visually illustrate this dynamic, to show a sufficient convergence of theoretical and actual results. It was established that in the city of Kyiv during 2015-2019, the mass production of construction and demolition waste grew exponentially.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132812766","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 : 2023-07-30DOI: 10.31649/2311-1429-2023-1-43-50
Victor P. Kovalskiy, Mingjun Guo
The extensive use of deicing salt has not only solved the problem of road icing but also had a serious impact on the pavement, reducing its lifespan. In order to deeply understand the impact of deicing salt on the air voids of asphalt mixture in the northwest climate of China, this paper conducted freeze-thaw cycle tests on AC-13 and AC-16 asphalt mixtures under three different deicing salt solutions and three different low-temperature environments, and analyzed the changes in air voids, meanwhile, the Logistic prediction model was used to evaluate the change characteristics of the air voids. The experimental results showed that the air voids of asphalt mixture increased to varying degrees after multiple freeze-thaw cycles; when the temperature was above its freezing point, no frost heave damage occurred, and the air voids increased slowly; when the temperature was below the freezing point, frost heave damage occurred, causing rapid growth and connection of voids in the mixture, and the air voids increased rapidly; the Logistic model showed a good fit with the observed changes in air voids.
{"title":"THE INFLUENCE OF DEICING SALT ON AIR VOIDS OF ASPHALT MIXTURE UNDER FREEZE-THAW CYCLE","authors":"Victor P. Kovalskiy, Mingjun Guo","doi":"10.31649/2311-1429-2023-1-43-50","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-43-50","url":null,"abstract":"The extensive use of deicing salt has not only solved the problem of road icing but also had a serious impact on the pavement, reducing its lifespan. In order to deeply understand the impact of deicing salt on the air voids of asphalt mixture in the northwest climate of China, this paper conducted freeze-thaw cycle tests on AC-13 and AC-16 asphalt mixtures under three different deicing salt solutions and three different low-temperature environments, and analyzed the changes in air voids, meanwhile, the Logistic prediction model was used to evaluate the change characteristics of the air voids. The experimental results showed that the air voids of asphalt mixture increased to varying degrees after multiple freeze-thaw cycles; when the temperature was above its freezing point, no frost heave damage occurred, and the air voids increased slowly; when the temperature was below the freezing point, frost heave damage occurred, causing rapid growth and connection of voids in the mixture, and the air voids increased rapidly; the Logistic model showed a good fit with the observed changes in air voids.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126082354","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 : 2023-07-30DOI: 10.31649/2311-1429-2023-1-127-133
I. Babij, S. Ryndiuk, A. Zhadan
The article is devoted to the problem of rehabilitation of industrial areas, which is especially relevant in modern cities. The article distinguishes between all terms and justifies the feasibility of using the term "rehabilitation". Special attention is paid to the study of concepts that explain the process of restoration of urban areas, such as rehabilitation, reconstruction, restoration, revitalization and others.It was found that the development of industrial zones and their integration into the general urban infrastructure requires a comprehensive approach that takes into account social, ecological and economic aspects. This will contribute to the sustainable and balanced development of the city, preventing the degradation of industrial zones, and creating comfortable conditions for residents.
{"title":"REHABILITATION OF INDUSTRIAL AREAS AS PART OF THE URBAN SPACE","authors":"I. Babij, S. Ryndiuk, A. Zhadan","doi":"10.31649/2311-1429-2023-1-127-133","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-127-133","url":null,"abstract":"The article is devoted to the problem of rehabilitation of industrial areas, which is especially relevant in modern cities. The article distinguishes between all terms and justifies the feasibility of using the term \"rehabilitation\". Special attention is paid to the study of concepts that explain the process of restoration of urban areas, such as rehabilitation, reconstruction, restoration, revitalization and others.It was found that the development of industrial zones and their integration into the general urban infrastructure requires a comprehensive approach that takes into account social, ecological and economic aspects. This will contribute to the sustainable and balanced development of the city, preventing the degradation of industrial zones, and creating comfortable conditions for residents.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121731645","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 : 2023-07-30DOI: 10.31649/2311-1429-2023-1-140-145
Georgy Ratushnyak, Y. Biks, A. Lyalyuk
The current state of research on monitoring and expert-analytical assessment of the reliability of the thermal insulation envelope of buildings is analyzed. It was established that the reliability of the thermal insulation shell is determined by organizational and technological factors that affect the probability of thermal failure of the enclosing structures. A structural diagram of the concept of monitoring is proposed for the purpose of developing mechanisms for ensuring the reliability of the thermal insulation envelope of buildings. The structural scheme of the concept of monitoring the reliability of the thermal insulation shell of buildings assumes that the components of the target monitoring program are technical diagnostics based on the results of experimental thermal imaging survey, analysis of the risks of thermal failure of enclosing structures and the development of an expert analytical assessment of the reliability of the thermal insulation shell of buildings.
{"title":"MONITORING AND EXPERT-ANALYTICAL ASSESSMENT OF THE RELIABILITY OF THE BUILDING INSULATION SHELL","authors":"Georgy Ratushnyak, Y. Biks, A. Lyalyuk","doi":"10.31649/2311-1429-2023-1-140-145","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-140-145","url":null,"abstract":"The current state of research on monitoring and expert-analytical assessment of the reliability of the thermal insulation envelope of buildings is analyzed. It was established that the reliability of the thermal insulation shell is determined by organizational and technological factors that affect the probability of thermal failure of the enclosing structures. A structural diagram of the concept of monitoring is proposed for the purpose of developing mechanisms for ensuring the reliability of the thermal insulation envelope of buildings. The structural scheme of the concept of monitoring the reliability of the thermal insulation shell of buildings assumes that the components of the target monitoring program are technical diagnostics based on the results of experimental thermal imaging survey, analysis of the risks of thermal failure of enclosing structures and the development of an expert analytical assessment of the reliability of the thermal insulation shell of buildings.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127969251","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 : 2023-07-30DOI: 10.31649/2311-1429-2023-1-63-68
O. Kuznetsova, L. Ivanova
The results of theoretical researches on the basis of the structural theory of crack resistance and tensile strength of concrete after preliminary long compression of various intensity are stated. For the structural scheme in the form of a checkerboard arrangement of the aggregate in the cement matrix, the stress-strain state of concrete during unloading or subsequent stretching to stresses when the cement stone has exhausted its bearing capacity (cracks are formed) and destruction of concrete as a whole is considered.Analytical dependences of definition of the specified parameters for various levels of precompression are resulted.
{"title":"CRACK RESISTANCE AND STRENGTH OF CONCRETE UNDER TENSION AFTER PRELIMINARY COMPRESSION BASED ON ITS STRUCTURAL THEORY","authors":"O. Kuznetsova, L. Ivanova","doi":"10.31649/2311-1429-2023-1-63-68","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-63-68","url":null,"abstract":"The results of theoretical researches on the basis of the structural theory of crack resistance and tensile strength of concrete after preliminary long compression of various intensity are stated. For the structural scheme in the form of a checkerboard arrangement of the aggregate in the cement matrix, the stress-strain state of concrete during unloading or subsequent stretching to stresses when the cement stone has exhausted its bearing capacity (cracks are formed) and destruction of concrete as a whole is considered.Analytical dependences of definition of the specified parameters for various levels of precompression are resulted.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121363199","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}
Стаття присвячена дослідженню важливості колористики фасадів будівель вищих навчальних закладів та її впливу на формування сприятливого середовища. Вона аналізує роль кольору в архітектурі та психологічні аспекти, пов'язані з використанням різних кольорів на фасадах. Дослідження показує, що правильне використання колористики може створювати сприятливу атмосферу для навчання, сприяти творчому мисленню та покращувати настрій студентів та викладачів. В статті представлені висновки, експериментальні дані та рекомендації щодо використання колористики для створення приємного та стимулюючого середовища в університетських будівлях, головних корпусах навчальних закладів, а також будівлях території кампусів.Фактично колір у вирішенні фасадного вигляду витупає як фактор покращення або руйнування цілісності та естетики середовища. Правильне використання фактору кольору може призвести до позитивних ефектів – пом’якшення помилок у організації урбаністичного середовища, виділення окремих ансамблів і споруд, покращення психологічного комфорту, навіть зростання загального культурного рівня. Але для цього необхідне проведення досліджень сприйняття кольору у рамках системи чинників комфорту, як з точки зору психології сприйняття, так і архітектурної практики та формування загального середовища.
{"title":"COLORS OF FACADES OF TALL-RIGHT BUILDINGS EDUCATIONAL INSTITUTIONS AND ITS INFLUENCE FOR THE FORMATION OF THE ENVIRONMENT","authors":"Oksana Khorosha, Alona Subin-Kozhevnikova, Yelizaveta Viktorova, Maryna Kushnir","doi":"10.31649/2311-1429-2023-1-115-120","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-115-120","url":null,"abstract":"Стаття присвячена дослідженню важливості колористики фасадів будівель вищих навчальних закладів та її впливу на формування сприятливого середовища. Вона аналізує роль кольору в архітектурі та психологічні аспекти, пов'язані з використанням різних кольорів на фасадах. Дослідження показує, що правильне використання колористики може створювати сприятливу атмосферу для навчання, сприяти творчому мисленню та покращувати настрій студентів та викладачів. В статті представлені висновки, експериментальні дані та рекомендації щодо використання колористики для створення приємного та стимулюючого середовища в університетських будівлях, головних корпусах навчальних закладів, а також будівлях території кампусів.Фактично колір у вирішенні фасадного вигляду витупає як фактор покращення або руйнування цілісності та естетики середовища. Правильне використання фактору кольору може призвести до позитивних ефектів – пом’якшення помилок у організації урбаністичного середовища, виділення окремих ансамблів і споруд, покращення психологічного комфорту, навіть зростання загального культурного рівня. Але для цього необхідне проведення досліджень сприйняття кольору у рамках системи чинників комфорту, як з точки зору психології сприйняття, так і архітектурної практики та формування загального середовища.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114281056","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 : 2023-07-30DOI: 10.31649/2311-1429-2023-1-51-56
V. Shvets, Marianna Postolatii
A working hypothesis for the development of a new construction material based on cement (C) using expanded polystyrene (PPS), technical carbon (TC) and foaming agent (PU) is proposed.The issue of improving the economic and energy indicators of construction due to the use of a new building material created on the basis of the synergistic effect of the use of positive characteristics of cement, expanded polystyrene, technical carbon and foaming agent is discussed, and the effectiveness of the use of each of these materials is considered.The main characteristics of lightweight PPS aggregate as an energy- and resource-saving new material are highlighted, the main advantages of using technical carbon as a material for increasing the strength and density of the frame are highlighted. The use of foaming additives to reduce the weight of the building block is considered.
{"title":"DEVELOPMENT OF A HIGH-PERFORMANCE BUILDING BLOCK USING POLYSTYRENE FOAM, ENGINEERED CARBON AND FOAMING FORM","authors":"V. Shvets, Marianna Postolatii","doi":"10.31649/2311-1429-2023-1-51-56","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-51-56","url":null,"abstract":"A working hypothesis for the development of a new construction material based on cement (C) using expanded polystyrene (PPS), technical carbon (TC) and foaming agent (PU) is proposed.The issue of improving the economic and energy indicators of construction due to the use of a new building material created on the basis of the synergistic effect of the use of positive characteristics of cement, expanded polystyrene, technical carbon and foaming agent is discussed, and the effectiveness of the use of each of these materials is considered.The main characteristics of lightweight PPS aggregate as an energy- and resource-saving new material are highlighted, the main advantages of using technical carbon as a material for increasing the strength and density of the frame are highlighted. The use of foaming additives to reduce the weight of the building block is considered.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122556642","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 : 2023-07-30DOI: 10.31649/2311-1429-2023-1-183-189
S. Kvaterniuk, Sviatoslav Vasylovych Mandebura, Dmytro Ruslanovych Latusha
The paper has improved the method of increasing the efficiency of cleaning agricultural drainage water from agrochemical products using artificial wetlands and floating higher aquatic plants. The method of wastewater treatment and control of pollution parameters includes the use of artificial wetlands in which wastewater is treated under aerobic conditions by microorganisms on the root system of higher aquatic plants, the formation of multispectral images of higher aquatic plants, analysis of multispectral images, indirect measurement of the ratio between carotenoids and chlorophyll in higher aquatic plants using regression equations. At the same time, during the operation of an artificial wetland, a layer of floating higheraquatic plants is periodically replaced with new plants, the withdrawn contaminated biomass of higher aquatic plants is dried, briquetted and used as fuel.
{"title":"IMPROVING THE EFFICIENCY OF AGRICULTURAL DRAINAGE WATER TREATMENT USING CONSTRUCTED WETLANDS","authors":"S. Kvaterniuk, Sviatoslav Vasylovych Mandebura, Dmytro Ruslanovych Latusha","doi":"10.31649/2311-1429-2023-1-183-189","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-183-189","url":null,"abstract":"The paper has improved the method of increasing the efficiency of cleaning agricultural drainage water from agrochemical products using artificial wetlands and floating higher aquatic plants. The method of wastewater treatment and control of pollution parameters includes the use of artificial wetlands in which wastewater is treated under aerobic conditions by microorganisms on the root system of higher aquatic plants, the formation of multispectral images of higher aquatic plants, analysis of multispectral images, indirect measurement of the ratio between carotenoids and chlorophyll in higher aquatic plants using regression equations. At the same time, during the operation of an artificial wetland, a layer of floating higheraquatic plants is periodically replaced with new plants, the withdrawn contaminated biomass of higher aquatic plants is dried, briquetted and used as fuel.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128109507","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}
A methodology for calculating individual components of the exergy balance and the exergy coefficient of useful action for non-stationary heat and mass transfer processes, in particular drying processes, is proposed. It is shown that the analysis of the drying process by exergetic characteristics is more effective than by thermal characteristics, as it makes it possible to estimate both internal and external losses, as well as the potential of energy flows. Calculations of exergetic and thermal efficiency of the chamber convective dryer were performed on the basis of the proposed methodology. It was established that when the temperature of the incoming heat carrier changes from 5 to 35°С, the exergetic efficiency of the drying unit changes within 4...16%, while the thermal efficiency determined using heat balance equations is about 50%. It is shown that with an increase in the temperature of the surrounding environment, the exergetic efficiency of chamber drying units decreases significantly, and the thermal efficiency changes within 5%, while it increases with an increase in the temperature of the heat carrier at the input, and decreases with an increase in the temperature of the heat carrier at the outlet in such the very limits. Exergy losses in drying plants are due to losses caused by flows of substances that carry exergy out of the system, losses as a result of heat exchange at a finite temperature difference, or mass exchange at a finite concentration difference, as a result of mechanical friction and hydraulic resistance, chemical reactions in non-equilibrium conditions, reduction of the magnetic or electric field under the action of electric resistance, etc. To increase the exergy efficiency of chamber drying units, it is necessary to reduce the exergy losses in the heaters, therefore it is preferable not to use steam heaters, it is worth giving preference to electric heaters or pyrolysis boilers of indirect air heating. It is also necessary to reduce heat loss during mixing of spent and fresh heat carrier, to reduce the temperature of the incoming heat carrier.
{"title":"ANALYSIS OF COMPONENT EXERGETIC EFFICIENCY CHAMBER CONVECTIVE DRYER","authors":"Oleksandr Spivak, Natalia Rezydent, Yaroslav Krymnyak","doi":"10.31649/2311-1429-2023-1-101-106","DOIUrl":"https://doi.org/10.31649/2311-1429-2023-1-101-106","url":null,"abstract":"A methodology for calculating individual components of the exergy balance and the exergy coefficient of useful action for non-stationary heat and mass transfer processes, in particular drying processes, is proposed. It is shown that the analysis of the drying process by exergetic characteristics is more effective than by thermal characteristics, as it makes it possible to estimate both internal and external losses, as well as the potential of energy flows. Calculations of exergetic and thermal efficiency of the chamber convective dryer were performed on the basis of the proposed methodology. It was established that when the temperature of the incoming heat carrier changes from 5 to 35°С, the exergetic efficiency of the drying unit changes within 4...16%, while the thermal efficiency determined using heat balance equations is about 50%. It is shown that with an increase in the temperature of the surrounding environment, the exergetic efficiency of chamber drying units decreases significantly, and the thermal efficiency changes within 5%, while it increases with an increase in the temperature of the heat carrier at the input, and decreases with an increase in the temperature of the heat carrier at the outlet in such the very limits. Exergy losses in drying plants are due to losses caused by flows of substances that carry exergy out of the system, losses as a result of heat exchange at a finite temperature difference, or mass exchange at a finite concentration difference, as a result of mechanical friction and hydraulic resistance, chemical reactions in non-equilibrium conditions, reduction of the magnetic or electric field under the action of electric resistance, etc. To increase the exergy efficiency of chamber drying units, it is necessary to reduce the exergy losses in the heaters, therefore it is preferable not to use steam heaters, it is worth giving preference to electric heaters or pyrolysis boilers of indirect air heating. It is also necessary to reduce heat loss during mixing of spent and fresh heat carrier, to reduce the temperature of the incoming heat carrier.","PeriodicalId":221366,"journal":{"name":"Modern technology, materials and design in construction","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126075454","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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