Mirosław Żukowski | Bialystok University of Technology (original) (raw)
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Papers by Mirosław Żukowski
Ciepłownictwo, Ogrzewnictwo, Wentylacja, 2010
Routledge eBooks, Aug 3, 2021
Rocznik Ochrona Srodowiska, 2016
Symulacja w Badaniach i Rozwoju, 2014
Materiały Ceramiczne /Ceramic Materials, 2011
Lawa wyp ywaj c z podmorskich wulkanow stykaj c si z wod absorbowa a w swej strukturze nieznaczn ... more Lawa wyp ywaj c z podmorskich wulkanow stykaj c si z wod absorbowa a w swej strukturze nieznaczn jej ilo – oko o kilku procent. Powsta a w ten sposob ska a nosi nazw perlit lub szk o wulkaniczne i dzi ki zawarto ci wody ma interesuj ce w asno ci z punktu widzenia praktycznych zastosowa w budownictwie. W temperaturze od 850 do 1000°C ska a zaczyna mi kn . W tym czasie woda odparowuje i uchodz c ze struktury powoduje rozszerzanie si materia u, ktory jednocze nie ulega spiekaniu. Obj to powsta ej substancji, zwanej perlitem ekspandowanym, wzrasta od 7 do 20 razy w porownaniu z rozmiarem pocz tkowym. G sto zmienia si od 1000-1200 kg/m3 do 30-150 g/m3. Posta perlitu w poszczegolnych etapach jego przetwarzania pokazano na Rys. 1. Perlit w przewa aj cej cz ci sk ada si z SiO2 ( 72 %), Al2O3 ( 14 %), K2O ( 4 %), Na2O ( 3 %), Fe2O3 ( 1 %), CaO ( 1 %), MgO ( 0,5 %). Reszt stanowi inne sk adniki i woda zwi zana chemicznie. Dzi ki porowatej struktuWykorzystanie pustakow szczelinowych wype nionych ekspandowanym perlitem w technologiach energooszcz dnych
Materiały Ceramiczne /Ceramic Materials, 2011
International Journal of Ventilation, Apr 1, 2019
Abstract One of important parameters of a room microclimate is carbon dioxide level that could be... more Abstract One of important parameters of a room microclimate is carbon dioxide level that could be predicted using models presented in literature. In buildings with high heat gains from people, like classrooms, conference rooms or gyms, during estimation of the CO2 concentration it is strongly recommended to take into account changes of indoor air temperature. The article presents a mathematical model of the phenomena of heat transport in a room that includes heat transfer between the analysed room and surroundings, air exchange within the confines of natural ventilation and infiltration, heat gains from people and solar gains. The numerical solution draws upon an analogy between the mathematical description of the non-stationary fields of temperature and electrical potentials. A simulation of the indoor temperature changes was applied to the carbon dioxide concentration model formulated by Krawczyk, Rodero, Gładyszewska-Fiedoruk and Gajewski and a T-CO2 model was developed. Presented methodology and delivered application allows to estimate CO2 level changes in rooms in significantly more precise way than setting temperature at constant level.
CRC Press eBooks, May 21, 2013
Renewable Energy, 2018
The article compares the thermal performance of two types of ground-air heat exchangers (GAHEs). ... more The article compares the thermal performance of two types of ground-air heat exchangers (GAHEs). The subject of the study included a new type of tube exchanger with a two-level arrangement and an innovative plate exchanger, in which the air is in direct contact with the ground. Experimental tests of the two systems were conducted in identical weather and ground conditions, and in the same surface area of the exchangers, 12 m × 28 m. The results indicated that the energy gain in heating mode was 13.5 MWh for the tube GAHE and 16.35 MWh for the plate GAHE. In the summer season (cooling ventilation air) the tube GAHE provided 10.3 MWh of energy while the plate GAHE gave 20.41 MWh. It was observed that in the winter season, the plate exchanger demonstrates an increase of humidity in the ventilation air by an average of 1.45 g/m 3 per hour. Based on the experimental results it can be concluded that the using both types of the GAHEs in summer and winter is energyefficient in the climatic conditions of northeastern Poland.
Ciepłownictwo, Ogrzewnictwo, Wentylacja, 2011
Ciepłownictwo, Ogrzewnictwo, Wentylacja, 2012
Ciepłownictwo, Ogrzewnictwo, Wentylacja, 2011
Advances in Renewable Energy Research, 2017
Solar Energy, Dec 1, 2019
Abstract The paper presents the results of the laboratory testing and numerical simulations of ce... more Abstract The paper presents the results of the laboratory testing and numerical simulations of ceramic solar panels. The experimental research was carried out in artificial (laboratory) operating conditions. Rise in temperature and pressure drop of the fluid flowing through the collector was measured. As a result of the tests, the linear relationship between efficiency and reduced temperature difference was determined. While the pressure drop was approximated by the exponential function. Another research method based on numerical modelling using Computational Fluid Dynamics (CFD) algorithms was applied in this study. The three-dimensional geometric model of the ceramic panel was developed using the application included in the Ansys v. 19.2 package. The data obtained from computer simulations were compared with the results of the experiment to validate the numerical model. In order to find potential opportunities to increase the efficiency and due to the fact that the ceramic panel can be made in various inlet and outlet configurations, three simulation cases were considered: diagonal, top – bottom, and left – right. As the results of numerical calculations showed, the largest flow irregularity occurred in the last configuration. Based on the analysis of the test results, it can be concluded that, in spite of some disadvantages, ceramic panels can compete with traditional solar collectors currently available on the market.
Ciepłownictwo, Ogrzewnictwo, Wentylacja, 2010
Routledge eBooks, Aug 3, 2021
Rocznik Ochrona Srodowiska, 2016
Symulacja w Badaniach i Rozwoju, 2014
Materiały Ceramiczne /Ceramic Materials, 2011
Lawa wyp ywaj c z podmorskich wulkanow stykaj c si z wod absorbowa a w swej strukturze nieznaczn ... more Lawa wyp ywaj c z podmorskich wulkanow stykaj c si z wod absorbowa a w swej strukturze nieznaczn jej ilo – oko o kilku procent. Powsta a w ten sposob ska a nosi nazw perlit lub szk o wulkaniczne i dzi ki zawarto ci wody ma interesuj ce w asno ci z punktu widzenia praktycznych zastosowa w budownictwie. W temperaturze od 850 do 1000°C ska a zaczyna mi kn . W tym czasie woda odparowuje i uchodz c ze struktury powoduje rozszerzanie si materia u, ktory jednocze nie ulega spiekaniu. Obj to powsta ej substancji, zwanej perlitem ekspandowanym, wzrasta od 7 do 20 razy w porownaniu z rozmiarem pocz tkowym. G sto zmienia si od 1000-1200 kg/m3 do 30-150 g/m3. Posta perlitu w poszczegolnych etapach jego przetwarzania pokazano na Rys. 1. Perlit w przewa aj cej cz ci sk ada si z SiO2 ( 72 %), Al2O3 ( 14 %), K2O ( 4 %), Na2O ( 3 %), Fe2O3 ( 1 %), CaO ( 1 %), MgO ( 0,5 %). Reszt stanowi inne sk adniki i woda zwi zana chemicznie. Dzi ki porowatej struktuWykorzystanie pustakow szczelinowych wype nionych ekspandowanym perlitem w technologiach energooszcz dnych
Materiały Ceramiczne /Ceramic Materials, 2011
International Journal of Ventilation, Apr 1, 2019
Abstract One of important parameters of a room microclimate is carbon dioxide level that could be... more Abstract One of important parameters of a room microclimate is carbon dioxide level that could be predicted using models presented in literature. In buildings with high heat gains from people, like classrooms, conference rooms or gyms, during estimation of the CO2 concentration it is strongly recommended to take into account changes of indoor air temperature. The article presents a mathematical model of the phenomena of heat transport in a room that includes heat transfer between the analysed room and surroundings, air exchange within the confines of natural ventilation and infiltration, heat gains from people and solar gains. The numerical solution draws upon an analogy between the mathematical description of the non-stationary fields of temperature and electrical potentials. A simulation of the indoor temperature changes was applied to the carbon dioxide concentration model formulated by Krawczyk, Rodero, Gładyszewska-Fiedoruk and Gajewski and a T-CO2 model was developed. Presented methodology and delivered application allows to estimate CO2 level changes in rooms in significantly more precise way than setting temperature at constant level.
CRC Press eBooks, May 21, 2013
Renewable Energy, 2018
The article compares the thermal performance of two types of ground-air heat exchangers (GAHEs). ... more The article compares the thermal performance of two types of ground-air heat exchangers (GAHEs). The subject of the study included a new type of tube exchanger with a two-level arrangement and an innovative plate exchanger, in which the air is in direct contact with the ground. Experimental tests of the two systems were conducted in identical weather and ground conditions, and in the same surface area of the exchangers, 12 m × 28 m. The results indicated that the energy gain in heating mode was 13.5 MWh for the tube GAHE and 16.35 MWh for the plate GAHE. In the summer season (cooling ventilation air) the tube GAHE provided 10.3 MWh of energy while the plate GAHE gave 20.41 MWh. It was observed that in the winter season, the plate exchanger demonstrates an increase of humidity in the ventilation air by an average of 1.45 g/m 3 per hour. Based on the experimental results it can be concluded that the using both types of the GAHEs in summer and winter is energyefficient in the climatic conditions of northeastern Poland.
Ciepłownictwo, Ogrzewnictwo, Wentylacja, 2011
Ciepłownictwo, Ogrzewnictwo, Wentylacja, 2012
Ciepłownictwo, Ogrzewnictwo, Wentylacja, 2011
Advances in Renewable Energy Research, 2017
Solar Energy, Dec 1, 2019
Abstract The paper presents the results of the laboratory testing and numerical simulations of ce... more Abstract The paper presents the results of the laboratory testing and numerical simulations of ceramic solar panels. The experimental research was carried out in artificial (laboratory) operating conditions. Rise in temperature and pressure drop of the fluid flowing through the collector was measured. As a result of the tests, the linear relationship between efficiency and reduced temperature difference was determined. While the pressure drop was approximated by the exponential function. Another research method based on numerical modelling using Computational Fluid Dynamics (CFD) algorithms was applied in this study. The three-dimensional geometric model of the ceramic panel was developed using the application included in the Ansys v. 19.2 package. The data obtained from computer simulations were compared with the results of the experiment to validate the numerical model. In order to find potential opportunities to increase the efficiency and due to the fact that the ceramic panel can be made in various inlet and outlet configurations, three simulation cases were considered: diagonal, top – bottom, and left – right. As the results of numerical calculations showed, the largest flow irregularity occurred in the last configuration. Based on the analysis of the test results, it can be concluded that, in spite of some disadvantages, ceramic panels can compete with traditional solar collectors currently available on the market.