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Browsing by Author "Złotkowski, Albert"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    A study of hydraulic characteristic for borehole heat exchangers
    (2017) Śliwa, Tomasz; Jaszczur, Marek; Kruszewski, Michał; Sapińska-Śliwa, Aneta; Bieda, Anna; Kowalski, Tomasz Wojciech; Złotkowski, Albert
    Thermal Response Test (TRT) is a standard test performed in borehole heat exchangers (BHE), which provides thorough understanding of thermal parameters of surrounding rock mass. Following work consists of calculations for hydraulic power and pressure losses along the BHE’s length. Analysis was carried out in eight BHE’s with different diameters, lengths and heat carriers in various areas throughout Poland. In accordance with TRT results, potential power exchanged between BHE and rock mass was determined. In order to find relations between pressure losses and volumetric flow rate, hydraulic tests in average static temperature of rock mass and during heating period were investigated. Proportions between hydraulic power and total power exchange with rock mass are also presented in following research.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    An analysis of a temperature change in a cross-section of borehole heat exchanger
    (2013) Złotkowski, Albert; Szczesiul, Patrycja
    Underground heat exchangers (BHE) are used witch elements to transport energy between the ground and other objects on the surface of the land. For simplification described in mathematical apparatus, they works are explain how linear heat source. The temperature is the same in all bodies of this model. This reduction to let easy describe theoretical changes temperature in BHE through transporting energy to / from rock in analytic mathematic method. The bad effect of this method is present by the same value of temperature in horizontal cross-section and along BHE. The analysis of change of temperature field in the sealing cement BHE is a possibility for numerical simulation or laboratory model. Computer simulation needed according energy transport law. It to say about quantity of energy conducting between horizontal cross-section of BHE cells, on which is divided. The second method obtains value of temperature points of the sealing cement. This is to be realized by sensors set up in to the horizontal cross-section of BHE of laboratory model. This is possible thanks constructed the model of cross-section of BHE.
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    Item type:Thesis, Access status: Restricted ,
    Analiza możliwości pozyskiwania i wykorzystanie energii oraz wód termalnych w Busku Zdroju
    (Data obrony: 2019-09-27) Kita, Paweł
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Analiza pracy geotermalnych pomp ciepła
    (Data obrony: 2020-12-04) Jania, Dawid
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Analiza redukcji strat ciepła podczas przepływu wody geotermalnej przez otwory wiertnicze
    (Data obrony: 2020-10-09) Gleń, Paweł
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analysis of energy transfer between pipes of U-type borehole heat exchanger
    (Wydawnictwa AGH, 2017) Złotkowski, Albert; Druzgała, Angelika; Zeljaś, Dagmara
    Use of low-temperature energy accumulated in the ground for heating buildings requires the borehole heat exchangers. The amount of heat exchanged (by the heat exchanger with the urethane) depends on the construction material parameters used to make the exchanger. One of the problems with the efficiency of the heat exchanger is the amount of heat transferred between the borehole pipes. This phenomenon can be described using numerical simulations or by studying a laboratory model. This article shows the results of laboratory measurements of the heat flux permeating between the pipes of the heat exchanger.
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    Item type:Article, Access status: Open Access ,
    Analysis of technological parameters of cement slurries used for sealing casing in the Lublin Basin area
    (2016) Stryczek, Stanisław; Wiśniowski, Rafał; Kremieniewski, Marcin; Rzepka, Marcin; Kotwica, Łukasz; Złotkowski, Albert
    Both fresh and hardened cement slurries should meet respective standards. Recently the Faculty of Drilling, Oil and Gas AGH UST and Oil and Gas Institute – National Research Institute have recently realized works within the OPTIDRILLTEC project aimed at the modification of the existing and working out of new 9 recipes of slurries to be used for sealing wells on shale deposits. For this reason a crew of specialists realized scientific analyses with the use of high class control and measuring systems. These are, among others, pressure consistometers, filtration presses, viscometers, apparatus for measuring permeability and migration of gas, mercury porosimeter, ultrasound cement analyzer, strength testing machine. The investigations of cement slurries are aimed at working out recipes of slurries for sealing casing in wellbores drilled in shale gas formations.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analysis of technological parameters of cementing slurries for horizontal casing works in Pomeranian Basin
    (2015) Stryczek, Stanisław; Wiśniowski, Rafał; Kotwica, Łukasz; Złotkowski, Albert; Rzepka, Marcin; Kremieniewski, Marcin; Skrzypaszek, Krzysztof
    Paper presents results of investigation on the properties of cement slurries used in casing works in horizontal wells. Six slurries were investigated. Each slurry was optimized to fulfill the demands of a particular well drilled in Pomeranian Basin in northern Poland. Slurries were designed the way to obtain flow diameter in the range 240-270 mm and exhibiting no sedimentation. Special emphasis was put on the stability of the slurries, due to high requirements for stability of slurries used in casing works in horizontal wells. Slurries were cured in conditions characteristic for particular wells (pressure in the range between 35 and 49 MPa, temperature in the range between 80 and 90 degrees of Celsius). For hardened slurries mechanical properties were determined. Phase composition of hardened slurries was determined with XRD and thermal analysis. In addition microstructural observations were done in order to determine the influence of temperature on microstructure of hardened cement matrix.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Badania stwardniałych zaczynów cementowych z dodatkiem grafitu
    (2011) Śliwa, Tomasz; Sowa, Mirosław; Stryczek, Stanisław; Gonet, Andrzej; Złotkowski, Albert; Sapińska-Śliwa, Aneta; Knez, Dariusz
    High conductivity of borehole plugging is advantageous for borehole heat exchangers. There is described in the paper results of laboratory tests of hardened cement grout with graphite. Graphite causes concrete to happen growing heat conductivity.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Badania stwardniałych zaczynów uszczelniających do otworowych wymienników ciepła
    (Data obrony: 2020-08-11) Londzin, Łukasz
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Badania stwardniałych zaczynów uszczelniajacych pod kątem przewodnictwa cieplnego
    (Data obrony: 2020-01-17) Cekus, Dominik
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Badania stwardniałych zaczynów uszczelniajacych pod kątem przewodnictwa cieplnego
    (Data obrony: 2020-01-17) Bugajny, Adrian
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Badania stwardniałych zaczynów uszczelniajacych pod kątem przewodnictwa cieplnego
    (Data obrony: 2020-01-17) Zajączkowski, Szymon
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Badania właściwości zaczynów cementowych modyfikowanych syntetycznymi dodatkami
    (Data obrony: 2020-01-31) Gnilichenko, Ivan
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Badania wpływu wilgotności stwardniałych zaczynów uszczelniających na ich przewodność cieplną
    (Data obrony: 2020-09-29) Czyż, Sylwia
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Determining the actual temperature of the side of a borehole heat exchanger
    (Wydawnictwa AGH, 2017) Złotkowski, Albert; Druzgała, Angelika
    Borehole heat exchangers (BHE) are made as hydraulic systems consolidated by cement slurry in boreholes. They mediate in heat exchange between the receiver on the surface (heat pump), and the reservoir of thermal energy (rock mass). In the analytical description of temperature changes accompanying energy download and return to the rock mass, the temperature of the entire borehole heat exchanger is assumed to be the same. In fact, the exchanger temperature changes both in the vertical and horizontal cross-sectional view of the exchanger. Accordingly, the temperature of the interface of the hardened cement slurry and the rock mass differs from the one which was adopted for design calculations. The article shows the differences between the theoretical and actual state, when the temperature was measured with a thermal imaging camera. It also includes suggestions regarding the mathematical description of temperature changes on the side surface of the heat exchanger. Measurements were made by a model of a BHE equipped with a single U-tube.
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    Item type:Thesis, Access status: Restricted ,
    Efektywność energetyczna otworowych wymienników ciepła
    (Data obrony: 2019-12-20) Juruś, Bartłomiej
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Influence of fluidal ashes from lignite on technological properties of slurries based on G-class drilling cements
    (2013) Stryczek, Stanisław; Gonet, Andrzej; Wiśniowski, Rafał; Złotkowski, Albert; Ziaja, Jan
    New generation fly ashes are a produced during coal combustion in fluidized bed furnaces with simultaneous sulphur removal from the gas. This process is held at temperature of about 850 degrees of Celsius. The generated ashes basically differ in their physicochemical properties from traditional silica ashes. Fluidal ashes produced during lignite combustion consist of active puzzolana in the form of dehydrated clayey minerals and active components activating the process of hydration of, e.g. $CaO$, anhydrite II and $CaCO_{3}$ ashes. The paper presents the results of laboratory analyses of the influence of ashes coming from the combustion of lignite on technological properties of fresh and set sealing slurries based on drilling cement.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Interpretacja testów reakcji termicznej otworowych wymienników ciepła
    (Data obrony: 2020-12-04) Plizga, Ziemowit
    Wydział Wiertnictwa, Nafty i Gazu
  • thumbnail.journal.alt
    Item type:Patent, Access status: Open Access ,
    Kompozycja uszczelniająca przeznaczona do stosowania w pracach geoinżynieryjnych
    (Urząd Patentowy Rzeczypospolitej Polskiej, 2025-05-26) Stryczek, Stanisław; Wiśniowski, Rafał; Złotkowski, Albert; Małolepszy, Jan; Kotwica, Łukasz; Wieczorek, Michał; Pichniarczyk, Paweł; Akademia Górniczo-Hutnicza im. Stanisława Staszica (Kraków); Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych