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Artykuły (CN-jge)

Permanent URI for this collectionhttps://repo.agh.edu.pl/handle/AGH/102803

Artykuły czasopisma Journal of Geotechnology and Energy

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2021 - 202545

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Preliminary comparative analysis of underground thermal energy storage, shallow and deep geothermal energy solutions for sustainable district heating in Poland
    (Wydawnictwa AGH, 2025) Hałaj, Elżbieta 
    This paper explores shallow and deep energy technologies supporting Poland’s district heating transition, focusing on aquifer thermal energy storage (ATES), borehole thermal energy storage (BTES), deep geothermal energy, and energy piles. Heating accounts for a major share of energy consumption and emissions in Poland, where district heating networks are essential for urban energy supply. National policies promote renewable energy integration and energy security, presenting opportunities for geothermal and underground thermal storage solutions. ATES and BTES offer seasonal heat storage by cycling thermal energy in subsurface aquifers and boreholes respectively, balancing variable heat demand and renewable supply. Deep geothermal energy provides stable base- -load heat via extraction from deep reservoirs, contributing reliable renewable heat despite requiring significant investment and geological specificity. Energy piles represent an innovative technology, combining building foundation piles with embedded heat exchangers, enabling efficient ground heat use for heating and cooling without additional land or deep drilling. This method is especially suited for urban environments and contributes to cost-effective decarbonization. The paper compares technical principles, geological conditions, performance, economic and environmental aspects of these technologies, highlighting their complementary roles in enhancing heat network flexibility, efficiency, and sustainability. The findings inform strategic planning and policy development to optimize Poland’s renewable heat infrastructure, supporting climate targets and energy independence for widespread adoption.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    The impact of reservoir parameters and well construction on gas well productivity
    (Wydawnictwa AGH, 2025) Blicharski, Jacek; Dybaś, Izabela
    The aim of this paper was to present the influence of selected reservoir parameters and well construction on the productivity of a gas well, using the example of a natural gas reservoir with high nitrogen content. Data from an exemplary well were used to carry out a variant assessment of the productivity of wells at different stages of reservoir exploitation, taking into account single- and two-phase gas-condensate mist flow in the well. The reservoir development process is briefly described at the beginning. Subsequently, the issues of gas inflow to the well, gas flow in the well and nodal analysis were discussed. The last part of the paper focuses on the variant assessment of the productivity at different stages of reservoir exploitation using a computational algorithm for single-phase and two-phase gas-condensate mist flow in the well.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analysis of the possibility of an incorrect shift of the mechanical index of a diaphragm gas meter working under vibration
    (Wydawnictwa AGH, 2025) Hofman, Radosław
    The article discusses the operation of bellows gas meters, commonly used to measure household gas consumption. It was noted that their testing and certification scope covers laboratory conditions, including work in vibration-free conditions, while vibrations occur in actual situations. It should be noted that the presented analysis is part of analyzing illegal gas consumption – UAG (unaccounted for gas), which is the subject of scientific research both in Poland and globally. The Oil and Gas Institute itself states [1] that it has received approximately 1,400 expert opinions, in which the gas meter user indicated that the counter had been skipped, while laboratory tests of the gas meter did not confirm any irregularities. The author, therefore, addresses the topic by asking whether the design of bellows gas meters with a mechanical counter may contain a design defect that may cause the counter to skip and then “disappear”. As part of the research, an analysis was made of whether vibrations had any impact on the operation of the gas meter, and after confirming the implications, the counter was dismantled, and an attempt was made to determine the causes of the impact of vibrations. Finally, it was indicated what values of forces and acceleration are sufficient to cause measurement errors, and it was recommended that the construction of the counter be modified to prevent this phenomenon from occurring. The conclusions show that if the gas meter is used outside the scope of its certification, the counter may jump. Still, this jump will not leave any mechanical traces, and the gas meter may ultimately function appropriately after the vibrations stop.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    The concept of a deep borehole heat exchanger at the AGH University Student Campus
    (Wydawnictwa AGH, 2025) Kunasz, Remigiusz; Śliwa, Tomasz; Sapińska-Śliwa, Aneta
    The paper provides an introduction to deep borehole heat exchangers, their use and completed projects worldwide. The aim of the study is to design a deep borehole heat exchanger at the AGH University Campus, more specifically its design, casing and internal heat exchanger pipe concept with a view to minimizing temperature losses. It goes on to describe the location of the project, including the geology of the area and the solution to the design problem, i.e. the casing of the borehole and the design concepts for the deep borehole heat exchanger. In the following section, the design of a deep borehole heat exchanger is presented. During the research, the main problem was the limited availability of articles on deep borehole heat exchangers. This is due to the continuous development and testing of new engineering ideas and the high implementation costs compared to the energy effects obtained. The publication only deals with technical issues, financial issues were not considered, among other things due to the current global geopolitical situation in 2023.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    The influence of the trajectory of a borehole heat exchanger on the power exchanged with the rock mass
    (Wydawnictwa AGH, 2025) Kowalski, Tomasz
    The article presents the influence of the trajectory of a borehole heat exchanger on the power exchanged with the rock mass. The focus is on the thermal parameters of rocks, which include thermal conductivity. This parameter can be determined using literature, laboratory tests or in-situ using a thermal response test. The design of the borehole heat exchanger as an inclined borehole maximizes the power exchanged with the rock mass by increasing the length of the borehole exchanger in the layer with the best thermal parameters. Mathematical calculations and thermal response tests show the advantage of inclined wells over vertical borehole heat exchangers in terms of the amount of power obtained from the rock mass.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Possibilities of using inclined boreholes in shallow drilling
    (Wydawnictwa AGH, 2025) Kowalski, Tomasz; Artym, Rafał; Toczek, Przemysław
    The article presents the possibilities of using inclined boreholes. Three cases were considered: backfill boreholes, hydrogeological boreholes, and borehole heat exchangers. The advantages and disadvantages of these solutions are described. In the case of an inclined backfill borehole, the time required for backfill material injection is minimized. In the case of an inclined hydrogeological borehole, the active filter area is increased, improving efficiency. In the case of inclined borehole heat exchangers, the unit power exchange with the rock mass is increased by increasing the length of the borehole in the layer with the best thermal conductivity.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Enhancing building energy efficiency through the implementation of renewable energy sources
    (Wydawnictwa AGH, 2025) Kowalska-Kubsik, Iwona
    Considering increasing sustainability requirements and the urgent need to reduce greenhouse gas emissions, improving the energy efficiency of buildings has become a key challenge in the construction sector. One of the most promising approaches involves the integration of renewable energy sources (RES) as alternatives to traditional, high-emission energy systems. This paper presents an analysis of the potential for using RES – such as solar, geothermal, and biomass energy – to enhance the energy efficiency of residential and public buildings. The economic and environmental benefits of implementing modern energy technologies are discussed, along with examples of technical solutions and hybrid system models. Legal, technical, and social aspects related to the implementation of such systems are also considered. The results of the analysis indicate that well-designed and properly managed RES systems can significantly reduce the demand for primary energy and CO? emissions while increasing the energy independence of buildings.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Possibilities of applying the vom Berg rheological model in research on polymer-modified drilling muds
    (Wydawnictwa AGH, 2025) Skrzypaszek, Krzysztof
    This article examines the potential application of the Vom Berg rheological model in the technology of polymer-modified drilling muds. In recent years, intensive research has been conducted at the Faculty of Drilling, Oil, and Gas to optimize procedures for selecting rheological models for technological fluids used in drilling operations. One of the key outcomes of this research is the proprietary RheoSolution methodology, applied in this study to assess the adaptability of the Vom Berg rheological model. Originally developed for analyzing the rheology of cement slurries in civil engineering, this model has been utilized here to describe the relationship between shear stress and shear rate in polymer-modified drilling muds. As part of the research, laboratory experiments were conducted at the Drilling Fluids Laboratory of the Faculty of Drilling, Oil, and Gas, focusing on drilling muds modified with xanthan biopolymer. The obtained results served as the basis for a comparative analysis of the classical API methodology and the proposed RheoSolution approach in determining the rheological parameters of the tested fluids. Special attention was given to the applicability of the Vom Berg model as a tool for a more precise characterization of drilling mud behavior under dynamic conditions. This article is part of a broader series of publications aimed at demonstrating the utility and potential advantages of the RheoSolution methodology in studies on the rheological properties of technological drilling muds.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Analysis of hydrogen gas saturation in sedimentary sequences of Volyn-Podillya (Ukraine)
    (Wydawnictwa AGH, 2025) Hubych, Ihor; Krupskyi, Yuii; Tsikhon, Serhii
    With the aim of using hydrogen energy by the Ukrainian industry, the paper considers the general patterns of hydrogen distribution in the sedimentary sequences of Volyn-Podillya. The general features of the distribution of water-dissolved and sorbed gases in rocks within productive and water-saturated complexes are analyzed. The genetic relationships between individual components of natural gases have been established, which allows us to identify depth intervals where hydrogen predominates in the well section. The latter, when used for regional forecasting, makes it possible to establish zones, and thus directions for the search for hydrogen accumulations in the sedimentary cover in Volyn-Podillya.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Economic analysis model for lithium production by Direct Lithium Extraction (DLE) method from a single well
    (Wydawnictwa AGH, 2025) Zwierzyński, Adam Jan
    The article presents an economic model enabling the assessment of the profitability of lithium extraction using the direct lithium extraction (DLE) method from geothermal brines from a single well. The model enables a preliminary simplified assessment of the profitability of DLE projects, which can be helpful in selecting the optimal locations for such projects and drilling production wells. The article also presents the critical role of lithium as a raw material for the decarbonization of the world economy, methods of its extraction and the economic prospects of the market for this raw material. It also presents exemplary DLE projects in the world.