Publikační činnost Katedry hornického inženýrství a bezpečnosti / Publications of Department of Mining Engineering and Safety (542)

Permanent URI for this collectionhttp://hdl.handle.net/10084/64808

Kolekce obsahuje bibliografické záznamy publikační činnosti (článků) akademických pracovníků Katedry hornického inženýrství a bezpečnosti (542) v časopisech registrovaných ve Web of Science od roku 2003 po současnost.
Do kolekce jsou zařazeny:
a) publikace, u nichž je v originálních dokumentech jako působiště autora (adresa) uvedena Vysoká škola báňská-Technická univerzita Ostrava (VŠB-TUO),
b) publikace, u nichž v originálních dokumentech není v adrese VŠB-TUO uvedena, ale autoři prokazatelně v době jejich zpracování a uveřejnění působili na VŠB-TUO.

Bibliografické záznamy byly původně vytvořeny v kolekci Publikační činnost akademických pracovníků VŠB-TUO, která sleduje publikování akademických pracovníků od roku 1990.

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Now showing 1 - 20 out of 83 results

Evaluation of safe operating envelope for CO2 injection under uncertain rock mechanical parameters and earth stresses
(Elsevier, 2024) Nermoen, Anders; Shchipanov, Anton; Porzer, Michal Matloch; Šancer, Jindřich; Berenblyum, Roman
Carbon Capture and Storage (CCS) is a pre-requisite to decarbonize CO2 emissions from industrial sectors and as an industry capable of compensating for hard-to-abate emissions in a net zero scenario. A method was developed to evaluate the geomechanical constraints and safe operating envelope as function of pore pressure and temperature. The probability of failure was estimated from uncertain input stiffness and strength data, and as cooling and re-pressurization shifts the in-situ effective stresses, the safe operating envelope was determined, here given by pressure and temperature. Onshore storages nearby industrial clusters enable energy and cost-effective handling of CO2. In the SouthEastern European region, onshore depleted oil and gas fields located nearby high-emitting industries may developed into CO2 storages. This paper describes a method for determining maximum fluid pressure as function of temperature from geomechanical restrictions. The method was employed on a practical example used to evaluate the safe operation envelope for a pilot CO2 injection site into a depleted onshore naturally fractured carbonate oil and gas field. The tool uses Monte Carlo simulations to perform geomechanical stability analyses by sampling from the inherent uncertainty of the input parameters to probability of failure as function of pressure and temperature. The risk of re-opening natural fractures, induced fracturing and fault reactivation are evaluated so the safe operating envelope can be obtained. The uncertainty of the input parameters is thus directly reflected in the safe operating envelope - thus providing an effective communication of value information to external stake holders when maturing a CO2 storage pilot.
Strength and deformation of pillars during mining in the shaft pillar
(MDPI, 2024) Šancer, Jindřich; Petroš, Vladimír; Hudeček, Vlastimil; Zapletal, Pavel
first_pagesettingsOrder Article Reprints Open AccessArticle Strength and Deformation of Pillars during Mining in the Shaft Pillar by Jindřich ŠancerORCID,Vladimír Petroš,Vlastimil Hudeček andPavel Zapletal *ORCID Department of Mining Engineering and Safety, Faculty of Mining and Geology, VSB Technical University Ostrava, 17 Listopadu 2172-15, 70800 Ostrava, Czech Republic * Author to whom correspondence should be addressed. Appl. Sci. 2024, 14(12), 5003; https://doi.org/10.3390/app14125003 Submission received: 24 April 2024 / Revised: 31 May 2024 / Accepted: 5 June 2024 / Published: 8 June 2024 (This article belongs to the Topic Complex Rock Mechanics Problems and Solutions) Downloadkeyboard_arrow_down Browse Figures Review Reports Versions Notes Abstract This study of the strength and deformation of coal samples was triggered by the need to define the stress–strain characteristics of pillars during room and pillar mining in the shaft protective pillar at the ČSM Mine. It was probably the world’s deepest deployment of this mining method in a coal mine. In order to solve the bearing capacity of pillars, the dependence of coal strength on the slenderness ratio is used. For this reason, coal samples with different slenderness ratios were investigated. After considering the purpose of this research, slenderness ratios (width/height) of 1 to 7.7 were chosen. At the same time, the modulus of deformation as a function of the slenderness ratio was determined, and the vertical deformation of the pillars and the safety factor were calculated. Attention is also paid to the influence of sampling on the results of measured coal strengths.
New equipment for determining friction parameters in external conditions: Measurements for the design
(MDPI, 2023) Žídek, Martin; Vaněk, Filip; Jezerská, Lucie; Prokeš, Rostislav; Gelnar, Daniel
Friction parameters such as the angle of internal friction and the external friction of soils (bulk materials) show the possibilities of further material use. These are, for example, possibilities for soil processing, handling, and storage. The determination of friction parameters is usually carried out under laboratory conditions. For the possibility of determining the properties of soils outside the laboratory in terms of immediate material response, a laboratory prototype was developed. The main objective for its development was to determine the effect of the shape of the friction surface when “sliding” on the soil. This was achieved with the help of validation equipment designed to measure, test, and validate the processes of raking, material piling, material transfer and removal, and tool movement or sliding on or in a material. It was found that by using an appropriate speed and normal load, the Jenike method can be applied to determine the angle of external friction over a shorter distance with an error of about 6–7.5% from the values measured on a calibrated shear machine. The results also showed that the method can be applied to detect the shear stresses that arise when a tool is plunged into a material, and thus predict the possible increase in energy loss during the process.
Possibilities of exploitation of graphite deposit in the Czech republic
(Technická univerzita Košice, Fakulta baníctva, ekológie, riadenia a geotechnológií, 2023) Hudeček, Vlastimil; Šancer, Jindřich; Zubíček, Václav
This article deals with mining technical proposals for the renewal of graphite raw material mining in the immediate vicinity of the town of Český Krumlov, where there are three sub-locations called Městský Vrch, Lazec-Křenov and Bíca. These sites are significant in terms of the quantity of natural graphite reserves, a raw material listed as a critical raw material by the EU. This list is regularly updated to reflect changing economic importance and supply challenges based on industrial availability. The article describes possible alternatives for the resumption of graphite mining in the Český Krumlov deposit (Městský Vrch and Lazec – Křenov localities). It describes the initial situation at the Český Krumlov deposit after the end of mining and the alternatives for the design of opening and mining operations. The authors conclude by comparing the advantages and disadvantages of the proposed alternatives.
Disposal of the abandoned mine workings of uranium mines - Case study of Rožná I mine, Czech Republic
(Technická univerzita Košice, Fakulta baníctva, ekológie, riadenia a geotechnológií, 2023) Vokurka, Michal; Zapletal, Pavel; Kříž, Petr
Having abandoned mine workings, the closure strategy of mine working openings is important in terms of maintaining long-term stability. The paper describes the process of closing the mine workings in the uranium deposit Rožná using unconsolidated backfill. Before backfilling, it is vital to carry out preparatory work underground for ecological, technological or economic reasons. The mine workings backfilling using unconsolidated backfill is preceded by calculations to determine the quantity of the backfill. The stability of the mine workings opening is achieved using a closing sinking platform made of reinforced concrete. The abandonment procedure is framed within the legislation of the Czech Republic, grounded in the handbook by the National Coal Board of Great Britain (NCB, 1982), and has been gradually amended according to the experience with disused mine workings. The Czech legislation dealing with mine abandonment is very advanced and may be applied to modify foreign legislation. The abandonment procedure based on Decree 52 (1997) proposed in this paper is complemented by safety features such as micropilots in the sinking platform or shaft lining check-up before the backfill. The proposed method is applicable in mines with analogous specific conditions, such as mines free of gas hazards and coal dust. The paper concludes with an analysis of risks likely to occur due to incorrect mine closures.
Maximizing the electrochemical performance of supercapacitor electrodes from plastic waste
(Elsevier, 2023) Dědek, Ivan; Bartusek, Stanislav; Dvořáček, Josef Jan; Nečas, Jan; Petruš, Josef; Jakubec, Petr; Kupka, Vojtěch; Otyepka, Michal
The management of the increasing volume of plastic waste has become a key challenge for society. A promising strategy now consists in the transformation of plastic waste into high-value materials that can be utilized in energy storage devices such as batteries and supercapacitors. In this study, we demonstrate a two-step procedure, involving pyrolysis, followed by chemical activation that will convert common plastic waste into activated carbons (ACs). This technique makes ACs suitable for supercapacitor electrode materials. Further, the electrochemical performance of ACs is outstanding in terms of capacitance, energy density, and cycling stability. Besides the well-established parameters, including a specific surface area and micropore volume, we found that other critical factors such as polymer glass transition temperature, polymer-activating agent miscibility, activating agent (K2CO3):AC ratio, and AC water dispersion stability also play a crucial role in determining the supercapacitors performance. Controlling these parameters, we obtained ACs as supercapacitor electrodes from a range of plastic waste materials with a competitive electrochemical performance. Specifically, the ACs exhibited a specific capacitance of 220 F g(-1) (at a current density of 1 A g(-1)), energy and power densities of 61.1 Wh kg(-1) and 36.9 kW kg(-1), respectively, and excellent cycling stability (95 % retention after 30,000 cycles). Our findings provide a pathway towards transforming plastic waste into valuable electrode materials for supercapacitors.
Nanoscale porosity of high surface area gadolinium oxide nanofoam obtained with combustion synthesis
(Wiley, 2023) de Boer, Roos M.; Chen, Xiaodan; Cvejn, Daniel; Peterek Dědková, Kateřina; van Huis, Marijn A. A.; Mendes, Rafael G.
Nanoscale gadolinium oxide (Gd2O3) is a promising nanomaterial with unique physicochemical properties that finds various applications ranging from biomedicine to catalysis. The preparation of highly porous Gd2O3 nanofoam greatly increases its surface area thereby boosting its potential for functional use in applications such as water purification processes and in catalytic applications. By using the combustion synthesis method, a strong exothermic redox reaction between gadolinium nitrate hexahydrate and glycine causes the formation of crystalline nanoporous Gd2O3. In this study, the synthesis of Gd2O3 nanofoam is achieved with combustion synthesis at large scale (grams). Its nanoscale porosity is investigated by nitrogen physisorption and its nanoscale 3D structure by electron tomography, and the formation process is investigated as well by means of in situ heating inside the transmission electron microscope. The bulk nanofoam product is highly crystalline and porous with a surface area of 67 m(2) g(-1) as measured by physisorption, in good agreement with the electron tomographic 3D reconstructions showing an intricate interconnected pore network with pore sizes varying from 2 to 3 nm to tens of nanometers. In situ heating experiments point to many possibilities for tuning the porosity of the Gd2O3 nanofoam by varying the experimental synthesis conditions.
The pelletization and torrefaction of coffee grounds, garden chaff and rapeseed straw
(Elsevier, 2023) Jezerská, Lucie; Sassmanová, Veronika; Prokeš, Rostislav; Gelnar, Daniel
Waste biomass pelletization is a suitable process for obtaining energy dense solid fuel. If the pellets are further processed by torrefaction, both their qualitative and energy parameters are changed. Therefore, the objective of this study is to investigate the effect of the torrefaction process on pellets made from coffee grounds, garden chaff and rapeseed straw. Mechanical parameters, such as the pellet durability index, the wettability index of the pellets, their water moisture resistance, hardness, or specific and bulk density were determined for evaluation. Furthermore, pellet energy parameters such as the heat of combustion, calorific value, or elemental analysis were compared. Pelletization of the above-mentioned waste biomass and the torrefaction of the pellets were carried out in pilot plants. The first results showed that the torrefaction process for all samples increased the values of the heat of combustion or the values of the carbon content. The energy value of the pellets increases. The higher heating value of torrefied coffee ground pellets reached 26 MJ kg−1. The ash content also increases with these values. A simple energy balance has been carried out. Therefore, the study shows an insight into the energy use of coffee grounds and chaff from the garden compared to the results of the rapeseed straw pellets for the pelletization and torrefication process.
Analysis and modelling of single domain core-shell (αFeNi/chromite) nanoparticles emitted during selective laser melting, and their magnetic remanence
(Elsevier, 2023) Dvorský, Richard; Kukutschová, Jana; Pagáč, Marek; Svoboda, Ladislav; Šimonová, Zuzana; Peterek Dědková, Kateřina; Bednář, Jiří; Mendes, Rafael Gregorio; Matýsek, Dalibor; Malina, Ondřej; Tuček, Jiří; Vilamová, Zuzana; Kiselev, Sergei; Gemming, Thomas; Filip, Peter
Despite recent intense implementation of increasingly eco-friendly additive manufacturing, the properties of nanoparticulate pollutants emitted during Laser Powder Bed Fusion are still not fully understood, and have generally been overlooked. This study aims to fill this gap in current research by providing new insights into distinct metal/oxide core-shell nanoparticles (3–36 nm) that are produced during 3D printing using stainless steel. It also suggests possible ways for the removal of these potentially harmful by-products. Further, this research also provides a newly developed kinetic model that predicts a metal core growth time of below 200 μs and confirms the predicted theory for the formation of these by-products. In the current study it was found that the cores produced during this process are purely metallic and consist of meteoroid phase kamacite (αFeNi). Within this study there was found to be a complete dominance of single-domain cores of kamacite with prevailing particles below the superparamagnetic threshold showing strong magnetic response and remanence. This new knowledge can be used to minimize potential health risks and reduce contamination of raw materials by this nanoparticulate pollutant, which can adversely affect the quality of printed metal parts, the environment, and the health of the operator. These findings also provide a new possibility of targeted efficient production of superparamagnetic core-shell nanoparticles with a metallic kamacite core during laser powder bed fusion of austenitic steel 316L powder, which can be used in the production of sensors.
Thermodynamic theory of the most energy-efficient natural repose angle
(Springer Nature, 2023) Zegzulka, Jiří; Maršík, František; Nečas, Jan; Hlosta, Jakub; Žurovec, David; Ivan, Igor
This paper describes the formation of the natural repose angle of non-cohesive bulk materials. The repose angle of particulates alpha is the angle between the tangent plane to the surface of the slope and the solid base. The paper presents a thermodynamic theory for the formation of the most energy-efficient natural slope alpha asymptotic to 30 degrees that can be found very often both in nature and industry. The theoretical foundation is based on Janssen theory of the statistical distribution of vertical and horizontal stress and adds its own consideration about dissipative work during the movement of material as a slope is being formed. The presented model is expanded to include an experimental part describing four methods of creation of a natural repose angle on three sand samples. The experiments performed demonstrated the validity of the submitted theory and the thermodynamic model with certain deviations derived from the essence of the experiments performed. These experiments explain a frequent occurrence of natural slopes with a repose angle of around 30 degrees.
3D printed laboratory equipment to measure bulk materials in extreme conditions
(Springer Nature, 2022) Diviš, Jan; Hlosta, Jakub; Žurovec, David; Rozbroj, Jiří; Kruszelnicka, Weronika; Nečas, Jan; Zegzulka, Jiří
Due to relatively new solutions in the field of 3D printing, there are few studies on the possibility of using printed elements in measuring devices. The aim of this study was to investigate the possibility of using instruments made by material extrusion 3D printing method for measurement of selected mechanical-physical properties of bulk materials. Study explores the feasibility of measuring bulk material mechanical-physical properties when there are obstacles for printing original or modified measuring instruments in common practice. To achieve the goals a series of experiments such as Schulze's ring shear tests, Freeman's FT4 shear tests, compressibility tests, and Flow Rate and Stability tests were performed with use of original aluminium or steel made instruments and 3D printed instruments from polylactic acid and acrylic styrene acrylonitrile materials, using lunar regolith simulants LHS-1 and LMS-1 produced by CLASS Exolith Lab as a sample material. The results obtained from tests with original and printed instruments were then compared. The compared values of tests showed applicability of the 3D printed measuring instruments in a 5% range of measurement deviation. The biggest advantages of the 3D printed measuring instruments were the lower weight, the ability to print on the spot, to replace a damaged part with a new 3D printed part on-demand if extremely fast results are needed or due to the logistical unavailability, customization of the standardized tests for better understanding the behaviour of the particulate materials, and cheaper manufacturing costs.
Notes on the abrasive water jet (AWJ) machining
(MDPI, 2021) Gembalová, Lucie; Hlaváč, Libor M.; Spadło, Sławomir; Geryk, Vladan; Oros, Luka
The aim of the research was to investigate changes of abrasive grains on metals observing the kerf walls produced by the Abrasive Water Jet (AWJ). The microscopy observations of the sidewalls of kerfs cut by the AWJ in several metal materials with an identical thickness of 10 mm are presented. The observed sizes of abrasive grains were compared with the results of research aimed at the disintegration of the abrasive grains during the mixing process in the cutting head during the injection AWJ creation. Some correlations were discovered and verified. The kerf walls observations show the size of material disintegration caused by the individual abrasive grains and also indicate the size of these grains. One part of this short communication is devoted to a critical look at some of the conclusions of the older published studies, namely regarding the correlation of the number of interacting particles with the acoustic emissions measured on cut materials. The discussion is aimed at the abrasive grain size after the mixing process and changes of this size in the interaction with the target material.
Hard gelatine capsules: DEM supported experimental study of particle arrangement effect on properties and vibrational transport behaviour
(Elsevier, 2022) Jezerská, Lucie; Prokeš, Rostislav; Gelnar, Daniel; Zegzulka, Jiří
Hard gelatine capsules remain a relevant dosage form for today's pharmaceutical manufacturing. A wide range of colour and print options supports marketing, brand image and patient loyalty. However, the filling of these cap-sules with various modern dosage forms and combinations thereof may affect their further processing. Therefore, a detailed study was carried out to assess the effect of mechanical-physical properties on the behaviour of differ-ently filled hard gelatine capsules. Capsules filled with powder, free or fixed particles presenting drug microforms and also hard gelatine capsules themselves were evaluated. Basic mechanical-physical characterisation was per -formed on all samples. Furthermore, their transport on the vibrating conveyor was assessed and simulated using DEM. The results showed a significant influence mainly by the degree of capsule imbalance, i.e., the arrangement of particles in the capsule. It was found that the hard gelatine capsules showed an average of 15.6 degrees lower values for the effective angle of internal friction compared to the powdered vitamin mixture, and in parallel, an average of 14.7 degrees lower values for the static angle of repose were also recorded. The results of the experiments on the vi-brating conveyor at a frequency setting of 15 Hz showed three times longer transport time for the vitamin mix-ture compared to the capsules. Increasing the frequency evened out these differences.
Shear lid motion in DEM shear calibration and the effect of particle rearrangement on the internal friction angle
(Elsevier, 2022) Nečas, Jan; Rozbroj, Jiří; Hlosta, Jakub; Diviš, Jan; Kaprálek, Jiří; Žurovec, David; Zegzulka, Jiří
Shear cell tests are now commonly applied in particulate calibration procedures for the discrete element method. Usually, only the shear stresses at the shear plane in the particle bed are examined in short-time instances. This work aimed to find the regularities between the internal friction angle, the vertical position of the shear lid, and the rearrangements of particles in the layers during the shear test with the time instance duration of tens to hundreds of seconds. The Schulze RST Ring Shear Tester was used to compare real experiments to numerical DEM models of non-cohesive materials. The shear tests were investigated for different contact models and DEM input parameters. We also simultaneously monitored the overall specimen stiffness, material dilatancy during calibration, and shear stress. Particle bed stiffness increases with increasing shear modulus and coefficient of static friction for two contact models. The internal friction angle, which is a bulk property of the material determined by a set of particle properties, determines the ability (or resistance) to make displacements of rigid nondeformable particles in the shear testing process. The angle of the resultant of the vector of particle motion in space from the horizontal plane correlates with the angle of internal friction (at each location of the shear cell).
Influence of the auxiliary air-duct outlet and the brattice location on the methane hazard-numerical simulations
(MDPI, 2022) Niewiadomski, Adam P.; Pach, Grzegorz; Różański, Zenon; Wrona, Paweł; Musioł, Dariusz; Zapletal, Pavel; Šofranko, Marian
The article presents the results of research into the influence of the location of auxiliary ventilation devices on the distribution of methane concentrations at the outlet of the longwall in an underground mine. Since this area is crucial from the point of view of explosion risk, the existence of an optimal arrangement of these devices could lead to improved safety of the crew working in the area. The aim of conducted study was to examine if the impact of this devices placement is significant. The research was carried out with the use of computational fluid dynamics (CFD) modeling-Ansys Fluent. The analyses took into account the location of the two most commonly used devices: a brattice and an auxiliary air-duct. The numerical model has been prepared and validated based on in situ measurements. Thirty-two cases of device configurations were analysed. The length and position of the brattice, as well as the height and position air-duct outlet along tailgate, were modified. It has been shown that although the presented solutions are an effective risk mitigation method, contrary to the common opinion of many practitioners, the impact of their exact placement, provided it is compliant with the regulations, is not significant for the registered methane concentration distribution at a longwall outlet.
The influence of atmospheric pressure on methane drainage from mines in the Upper Silesian Coal Basin
(Inderscience, 2022) Zapletal, Pavel; Pach, Grzegorz; Kosowski, Maciej
This article presents the impact of various factors on the parameters of gas drainage using a methane drainage station. This problem has been poorly researched so far; the widest presentation was offered in the article by Myszor (1972). We decided to investigate the mutual correlations of gas drainage factors and parameters. Having measured the atmospheric pressure and the composition of mine gas at two mines, Pniowek in Poland and Paskov in the Czech Republic, correlations were found between individual parameters. The measurements were obtained using an automatic chromatograph NGC8200 and the INMAT 66 system. Based on the research results, we found that the atmospheric pressure on the surface of the mine had the greatest impact on drainage gas, which allows us to conclude that it is possible to create a computer model enabling the prediction of methane drainage station operating parameters. Thus, it will be possible to predict the quality and quantity of mine gas, based on which the entire energy system and cooperation of individual sources will be effectively managed.
Case study of using the geothermal potential of mine water for central district heating - The Rozna deposit, Czech Republic
(MDPI, 2022) Vokurka, Michal; Kunz, Antonín
This paper analyzes the possibility of using the thermal energy of discharged environmentally friendly mine water for the heat supply of a selected locality. There are few cases of industrial use of geothermal water in the Czech Republic, but mine water has never been the source. Based on this fact, an analysis of the usability of mine water at the Rozna I Mine was carried out. The analysis showed that the energy output of this pumped water was sufficient for the selected location of the municipality of Dolni Rozinka, where long-term annual average consumptions are at a level of 4350 GJ. The theoretical maximum output of this source is calculated as 837.4 kW; therefore, it exceeds the output required to satisfy the energy needs of this location several times over. Based on this input information, a technical and economic model of the heating system installation project was developed with three options. The case study aimed to find and propose an optimal alternative solution to replace the current unsatisfactory state of heat supply in the village of Dolni Rozinka. In the final part of this paper, the most optimal option is identified by a comparative method, which replaces the existing central district heating based on the production of heat energy from natural gas, i.e., fossil fuels. This study was motivated by a strategy to replace fossil energy sources with renewable energy sources wherever conditions are suitable.
Geomontaneous tourism and the possibilities of utilizing abandoned mine workings in the Czech Republic
(Springer Nature, 2022) Koudelková, Jaroslava; Urbanec, Vítězslav; Korandová, Beáta; Hummel, Martin
This article deals with old mine workings as geoheritage and geomontaneous tourism places in the Czech Republic. A legislative solution for old mine workings is presented, and essential questions of their importance for development in regions are solved in this paper. The article is devoted to answering important questions of evaluating this potential. The reader is made acquainted with some facts regarding old mine workings and abandoned mines. This input addresses the legislative solution of these problems, including the coverage of mined-out minerals and the specific determination of their yield. Some statistical data are presented, and potential areas concerning the utilization of old and abandoned mine workings are identified in this paper.
Internal friction angle model of particles
(Springer Nature, 2022) Zegzulka, Jiří; Nečas, Jan; Rozbroj, Jiří; Gelnar, Daniel; Ramírez-Gómez, Álvaro; Jezerská, Lucie
Currently, pressure from industry to streamline processes by creating their simulation models, and thus to gradual digitization is increasing. The essence of representative simulation models of bulk materials is to understand the principles and laws of the real behavior of particles. The aim of this study is therefore to find and quantify the possibilities and principles of how particles can change their position relative to other particles. The possibilities of particle displacements were expressed using their specific trajectories and work ratios, or internal friction angle values. This created a new comprehensive model of the internal friction angle of particles independent of particle size. It enables the interpretation of the determined values of the angles of internal friction of particles and its application in the field of simulations of mass and process models. The model can be used to determine the basic composition of particles in volume and the dominant ways of their mutual displacements.
Využití geotermálního potenciálu důlních vod z ložiska Rožná k centrálnímu zásobování teplem sídliště v Dolní Rožínce : Studie proveditelnosti
(Vysoká škola báňská – Technická univerzita Ostrava. Fakulta materiálově – technologická, 2022) Vokurka, Michal; Kunz, Antonín
Předmětem studie proveditelnosti je zhodnocení možnosti využití důlních vod z ložiska Rožná. Důlní vody jsou v rámci provozních činností čerpány z dolu na povrch, následně čištěny a vypouštěny bez dalšího využití do místní vodoteče. Množství a teploty důlních vod, se kterými je takto nakládáno, představují zajímavý energetický potenciál pro praktické využití. Možnost praktické aplikace nabízí centrální plynová kotelna v Dolní Rožínce, která zajišťuje centrální zásobování teplem části obce Dolní Rožínka. Vzhledem ke stáří kotelny a nízkým odběrům tepla je jeho distribuce neefektivní a kotelna vyžaduje výraznou modernizaci. Tento stav vede k vypracování studie proveditelnost využití energetického potenciálu čerpaných důlních vod z Dolu Rožná I, který je v jeho blízkosti, pro účely centrálního zásobování teplem. Cílem studie proveditelnosti je prověřit technickou možnost konverze kotelny na technologii využívající obnovitelné zdroje energie (OZE) a prověřit ekonomickou smysluplnost takové konverze pro dodávky tepelné energie do stávajících objektů prostřednictvím centrálního zásobování teplem (CZT).

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