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Bibliografia publikacji pracowników
Państwowej Szkoły Wyższej w Białej Podlaskiej

Baza tworzona przez Bibliotekę Akademii Bialskiej im. Jana Pawła II.


Zapytanie: KOFANOV VALERY A
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Seria: A Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal ConductivityEnergies2020This article belongs to the Special Issue Recent Developments in Building Physics. Wartość wskaźnika IF za 2019 r.1996-10732019/202010.3390/en13030520Nikitsin, Vadzimmoisture diffusionKopia dostępna w Sekcji Bibliometrii.FINAL_PUBLISHEDThis paper proposes a method for determining an effective value of the thermal conductivity for moist, highly porous rigid polym, Vol. 13, CC-BY, issue 3, x, AT_PUBLICATION ; 2021-07-02, 11:46 ; article number 520, 3426878829, OPEN_JOURNAL, 3324029093
Charakterystyka formalna: binary system (vapor-gas mixture and water) with isolated inclusions. With an increase in moisture content, isolated water inclusions merge, forming a continuous layer, and pore space is considered as a binary system of interpenetrating components. The thermal conductivity of the vapor-gas mixture is represented as the sum of the thermal conductivity of the dry gas and the thermal conductivity of the vapor caused by the diffusion transfer of vapor in the pore space, taking into account the coefficient of vapor diffusion resistance. Using the proposed scheme of calculation, a computational experiment was performed to establish the influence of the vapor diffusion, moisture content, and average temperature of the foam on its thermal conductivity.^apolymer foam^aporous structure modeling^athermal conductivity
Charakterystyka wg MNiSW: 1073^bQ^iX^jXY^kQ005673^a003^b003^c2020-04-17, 14:10^d2021-07-02, 11:46^e3426878829^f3324029093^aA Model of Moist Polymer Foam and a Scheme for the Calculation of Its Thermal Conductivity^aEnergies^a2020^bVol. 13^cissue 3^darticle number 520^aThis article belongs to the Special Issue Recent Developments in Building Physics. Wartość wskaźnika IF za 2019 r.^a1996-1073^a2019/2020^a10.3390/en13030520^aNikitsin, Vadzim^cx^amoisture diffusion^aKopia dostępna w Sekcji Bibliometrii.^aFINAL_PUBLISHED^bCC-BY^cAT_PUBLICATION^eOPEN_JOURNAL^aThis paper proposes a method for determining an effective value of the thermal conductivity for moist, highly porous rigid polymer foams. The model of moist foam based on an ordered structure with interpenetrating components was developed in accordance with the moisture distribution in the pore space. With small moisture content, isolated water inclusions are formed, and the pore space is considered as a binary system (vapor-gas mixture and water) with isolated inclusions. With an increase in moisture content, isolated water inclusions merge, forming a continuous layer, and pore space is considered as a binary system of interpenetrating components. The thermal conductivity of the vapor-gas mixture is represented as the sum of the thermal conductivity of the dry gas and the thermal conductivity of the vapor caused by the diffusion transfer of vapor in the pore space, taking into account the coefficient of vapor diffusion resistance. Using the proposed scheme of calculation, a computational experiment was performed to establish the influence of the vapor diffusion, moisture content, and average temperature of the foam on its thermal conductivity.^apolymer foam^aporous structure modeling^athermal conductivity
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  • ystem (vapor-gas mixture and water) with isolated inclusions. With an increase in moisture content, isolated water inclusions merge, forming a continuous layer, and pore space is considered as a binary system of interpenetrating components. The thermal conductivity of the vapor-gas mixture is represented as the sum of the thermal conductivity of the dry gas and the thermal conductivity of the vapor caused by the diffusion transfer of vapor in the pore space, taking into account the coefficient of vapor diffusion resistance. Using the proposed scheme of calculation, a computational experiment was performed to establish the influence of the vapor diffusion, moisture content, and average temperature of the foam on its thermal conductivity.^apolymer foam^aporous structure modeling^athermal conductivity



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    Index Copernicus: ENGhttps://www.matec-conferences.org/articles/matecconf/abs/2019/31/matecconf_cesbp2019_02021/matecconf_cesbp2019_02021.html100^bZ^a003^b003^c2020-08-27, 13:32^d2022-01-11, 09:30^e3422778907^f3229939309^aDetermination of thermal conductivity of moist rigid polymer foams^aMATEC Web of Conferences^a2019^bVol. 282^darticle number 02021^a2261-236X^a2019/2020^a10.1051/matecconf/201928202021^athermal conductivity^a4th Central European Symposium on Building Physics (CESBP 2019)^aPraga^dCZ^b2019.09.2^c2019.09.05^aFINAL_PUBLISHED^bCC-BY^cAT_PUBLICATION^eOPEN_JOURNAL^aA geometric model of the polymer foam structure was verified taking into account the moisture content of the material and the degree of wetness of the pore surface. Mathematical relations were developed to determine the moisture value at which transition from partial to full wetting of the pore surface occurs and vice versa. A mathematical description of the heat transport process was carried out in the model structure of moist foam taking into account the diffusion of water vapour in the pore space and the nature of wetting of the pore surface. The influence of material porosity, its moisture and water vapour diffusion within the effective porosity on the effective thermal conductivity of the material was determined by calculation. A comparison between the calculation results and experimental data shows their sufficient compatibility.^amaterial porosity^arigid polymer foam^amathematical model^aporous structure modeling
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    Nr opisu: of pores or wetting angle at which the transition from partial wetting of the surface of the pores with liquid to full wetting and vice versa occurs. A mathematical description of the process of heat transfer in the model structure of a wet foamed polymer has been made, taking into account the diffusion of water vapor in the pore space.^ainterpenetrating components^ahigh-porous gas-filled polymers^apolyurethane foam^avapor diffusion^awetting angle
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    Seria: Nikitsin, Vadzimeffective heat conductivityFINAL_PUBLISHEDA method for calculating the effective thermal conductivity of moisture-containing highly porous foamed polymers is proposed. In this method a non-additive scheme for taking into account the effect of steam diffusion on heat transfer is used. The sequential binary systems (interstitial substance from a liquid and a vapor- gas mixture, as well as a polymer skeleton and an intra-porous substance) are described by models of structures with interpenetrating components and isolated inclusions. The conditions for , CC-BY-NC-SA, y, AT_PUBLICATION, OPEN_JOURNAL
    Tytuł całości: W: 2587-96182018/201910.22337/2587-9618-2019-15-1-67-77Nikitsin, Vadzimeffective heat conductivityFINAL_PUBLISHEDA method for calculating the effective thermal conductivity of moisture-containing highly porous foamed polymers is proposed. In this method a non-additive scheme for taking into account the effect of steam diffusion on heat transfer is used. The sequential binary systems (interstitial substance from a liquid and a vapor- gas mixture, as well as a polymer skeleton and an intra-porous substance) are described by models of structures with interpenetrating components and isolated inclusions. The conditions for the transition from one model of structure to another are defined and there is not necessity to define empirical coefficients. A geometric model of wet foamed polymer has been developed, that allows us to find a way to determine the value of the boundary moisture content of pores or wetting angle at which the transition from partial wetting of the surface : 2588-0195 : CC-BY-NC-SA, OPEN_JOURNAL / no 1 / y / AT_PUBLICATION
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    Nr opisu: Applied Mechanics and Engineering^a2017^bVol. 22^cNo. 3^dp. 509--519^a1425-1655^a2017/2018^a10.1515/ijame-2017-0033^aNikitsin, Vadzim^cy^acellular concrete^aKopia dostępna w Sekcji Bibliometrii^aAnaliza przewodności cieplnej innowacyjnych, energooszczędnych materiałów budowlanych^bdziałalność statutowa WNET PSW^c2017-WNET/KNT/ZB/1^aFINAL_PUBLISHED^bCC-BY-NC-ND^cAT_PUBLICATION^eOPEN_JOURNAL^aThe non-stationary moisture level of a cellular concrete wall board in a heated utility building located in the northern part of the town of Brest (Belarus), depending on the climatic influence, was assessed in this work. The results were obtained both in a calculation experiment and a physical test. It was observed that the main reason for the high moisture levels in cellular concrete is wind-driven rain intensifying the process of free capillary moisture transfer. A comparative analysis of the results of the physical test and the calculation experiment showed that the THSS software elaborated by the authors was able to predict the actual moisture levels of the shielding structure under study accurately enough when precise data concerning the thermal and physical characteristics of the materials as well as the occurring climatic influences were submitted.^awind-driven rain^acapillary transfer^awater sorption coefficient^amoisture content
    Autorzy: , , Vol. 22 działalność statutowa WNET PSW CC-BY-NC-ND International Journal of Applied Mechanics and Engineering20171425-16552017/201810.1515/ijame-2017-0033Nikitsin, Vadzimcellular concreteKopia dostępna w Sekcji BibliometriiAnaliza przewodności cieplnej innowacyjnych, energooszczędnych materiałów budowlanychFINAL_PUBLISHEDThe non-stationary moisture level of a cellular concrete wall board in a heated utility building located in the northern part of the town of Brest (Belarus), depending on the climatic influence, was assessed in this work. The results were obtained both in a calculation experiment and a physical test. It was observed that the main reason for the high moisture levels in cellular concrete is wind-driven rain intensifying the process of free capillary moisture transfer. A comparative analysis of the results of the physical test and the calculation experiment showed that the THSS software elaborated by the authors was able to predict the actual moisture levels of the shielding structure under study accurately enough when precise data concerning the thermal and physical characteristics of the materials as well as the occurring climatic influences were submitted.wind-driven raincapillary transferwater sorption coefficientmoisture content.
    Szczegóły:
    Seria: 20171425-16552017/201810.1515/ijame-2017-0033Nikitsin, Vadzimcellular concreteKopia dostępna w Sekcji BibliometriiAnaliza przewodności cieplnej innowacyjnych, energooszczędnych materiałów budowlanychFINAL_PUBLISHEDThe non-stationary moisture level of a cellular concrete wall board in a heated utility building located in the northern part of the town of Brest (Belarus), depending on the climatic influenc, Vol. 22, działalność statutowa WNET PSW, CC-BY-NC-ND, No. 3, y, 2017-WNET/KNT/ZB/1, AT_PUBLICATION ; p. 509--519, OPEN_JOURNAL
    Język publikacji: physical test and the calculation experiment showed that the THSS software elaborated by the authors was able to predict the actual moisture levels of the shielding structure under study accurately enough when precise data concerning the thermal and physical characteristics of the materials as well as the occurring climatic influences were submitted.^awind-driven rain^acapillary transfer^awater sorption coefficient^amoisture content
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    Index Copernicus: ntensifying the process of free capillary moisture transfer. A comparative analysis of the results of the physical test and the calculation experiment showed that the THSS software elaborated by the authors was able to predict the actual moisture levels of the shielding structure under study accurately enough when precise data concerning the thermal and physical characteristics of the materials as well as the occurring climatic influences were submitted.^awind-driven rain^acapillary transfer^awater sorption coefficient^amoisture content
    Praca recenzowana
    Słowa kluczowe ang.: oards^aInternational Journal of Applied Mechanics and Engineering^a2017^bVol. 22^cNo. 3^dp. 509--519^a1425-1655^a2017/2018^a10.1515/ijame-2017-0033^aNikitsin, Vadzim^cy^acellular concrete^aKopia dostępna w Sekcji Bibliometrii^aAnaliza przewodności cieplnej innowacyjnych, energooszczędnych materiałów budowlanych^bdziałalność statutowa WNET PSW^c2017-WNET/KNT/ZB/1^aFINAL_PUBLISHED^bCC-BY-NC-ND^cAT_PUBLICATION^eOPEN_JOURNAL^aThe non-stationary moisture level of a cellular concrete wall board in a heated utility building located in the northern part of the town of Brest (Belarus), depending on the climatic influence, was assessed in this work. The results were obtained both in a calculation experiment and a physical test. It was observed that the main reason for the high moisture levels in cellular concrete is wind-driven rain intensifying the process of free capillary moisture transfer. A comparative analysis of the results of the physical test and the calculation experiment showed that the THSS software elaborated by the authors was able to predict the actual moisture levels of the shielding structure under study accurately enough when precise data concerning the thermal and physical characteristics of the materials as well as the occurring climatic influences were submitted.^awind-driven rain^acapillary transfer^awater sorption coefficient^amoisture content
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    Nr opisu: itioning from the hydraulic radius of an ideal model to the hydraulic radius of a capillary-porous material the tortuosity and narrowing (widening) of capillaries, the increase in temperature associated with sorption of water vapor, and the variation of the water viscosity as a function of the hydraulic radius of the capillary must be taken into account. The experimental data are used to make a quantitative evaluation of these effects. On this basis a relation is proposed for determining the hydraulic radius of the porous structure of the ceramic materials used for construction articles.^ahydraulic radius of capillaries^anarrowing and windening of capillaries^asorption of water vapor^aviscosity of water
    Autorzy: , hydraulic radius of capillariesnarrowing and windening of capillariessorption of water vaporviscosity of water, hydraulic radius of capillariesnarrowing and windening of capillariessorption of water vaporviscosity of water.
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    Seria: hydraulic radius of capillariesnarrowing an
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    Tytuł czasopisma: OTHER, (OPEN_JOURNAL)
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    Słowa kluczowe ang.: Sekcji Bibliometrii.^aFINAL_PUBLISHED^bOTHER^cAT_PUBLICATION^eOPEN_JOURNAL^aZbadano niestacjonarny stan zawilgocenia betonu komórkowego płyty ściennej ogrzewanego budynku gospodarczego od oddziaływań klimatycznych za pomocą eksperymentu obliczeniowego i izycznego. Obliczenie wykonano z zastosowaniem programu komputerowego TWiND i ustalono, że wsród rozpatrywanych oddziaływań klimatycznych głowną przyczyną wysokiego poziomu wilgotności betonu komórkowego jest zacinający deszcz, które intensyfikuje proces swobonego kapilarnego transportu wilgoci. analiza porównawncza wyników eksperymentu fizycznego i obliczeniowego pokazała, że program TWIND, po dokładnym zadaniu wartości parametrów cieplno-fizycznych materiałów i uwzględnieniu oddziaływań klimatycznych, umozliwił wystarczająco dokładną prognozę rzeczywistego zawilgocenia rozpatrywanej osłony.^azacinający deszcz^adriving rain^aThe non-stationary moisture level of a cellular concrete wall board in a heated utility building located in the northern part of the town of Brest (Belarus), depending on climatic influence, was assessed in this work. The results were obtained both in a calculation experiment and a physical test. The calculation experiment was perforemd using TWiND computer application elaborated by the authors. It was observed thath wind-driven rain intensifying the process of free capillary moisture transfer is the main reason for the high moisture levels in cellular concrete. A comparative analysis of the results of the physical test and calcu
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