Sapińska-Śliwa, Aneta
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inżynieria środowiska, górnictwo i energetyka
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Item type:Article, Access status: Open Access , Analysis of the potential heating of selected student residences at The AGH University Of Krakow using the earth’s heat(Wydawnictwa AGH, 2023) Sapińska-Śliwa, Aneta; Kunasz, Remigiusz; Śliwa, TomaszThe aim of this study was to adapt the operating parameters of a geothermal heat pump system to the required average power needed to meet the energy for central heating and domestic hot water of selected student residences. Calculations of the average power required by the dormitories in the AGH University Student Campus were carried out, as well as modelling of the deep borehole heat exchanger for the heating load. The designed heating system for the student residences in the AGH University Student Campus using a deep borehole heat exchanger – is sufficient to cover the base heat demand for five four-storey dormitories. During the writing of the paper, the main problem was the low availability of articles on deep borehole heat exchangers. This is due to the continuous development and testing of new engineering ideas. Deep borehole heat exchangers can be use as new boreholes or wells prepared for liquidation. Also use of closed boreholes sometimes is possible, depending on project of liquidation. The future districy heating will use low-temperature heat carrier for heating and cooling. Use borehole fields as rockmass use for heat and/or cool ,storage will be common.Item type:Article, Access status: Open Access , Geological and drilling aspects of construction and exploitation geothermal systems HDR/EGS(2015) Sapińska-Śliwa, Aneta; Kowalski, Tomasz Wojciech; Knez, Dariusz; Śliwa, Tomasz; Gonet, Andrzej; Bieda, AnnaThe article presents an overview of developing unconventional geothermal systems, such as Hot Dry Rock Systems (HDR), where is used the heat of dry rock and enhanced system with smali water tributary called Enhanced Geothermal Systems (EGS). These systems provide utilization of geothermal energy in reservoirs (i.a. granites) where conventional methods are not possible to use. Operation HDR/EGS involves the use rock heating through warming medium, which flowing between the production and injection boreholes. In most cases medium introduced artifically by hydraulic fracturing. Currently, most of the projects HDR/EGS is in the implementation phase. Based on gathered materials an analysis of the construction and exploitation geothermal systems. Take into account geological and drilling aspects.Item type:Article, Access status: Open Access , Rock mass thermal analysis in underground thermal energy storage (UTES)(2012) Śliwa, Tomasz; Skowroński, Daniel; Sapińska-Śliwa, Aneta; Gonet, AndrzejIn the article, there has been described research conducted in underground thermal energy storage (UTES). There have been also presented temperature measurements led in thermo-piezometric boreholes. On the basis of the measurements, the correctness assessment of borehole heat exchangers (BHE) arrangement has been accomplished.Item type:Article, Access status: Open Access , New borehole heat exchangers in the Geoenergetics Laboratory at the Faculty of Drilling, Oil and Gas, AGH UST in Krakow(Wydawnictwa AGH, 2018) Śliwa, Tomasz; Gonet, Andrzej; Sojczyńska, Anna; Złotkowski, Albert; Kowalski, Tomasz Wojciech; Sapińska-Śliwa, AnetaThe Geoenergetics Laboratory at the Faculty of Drilling, Oil and Gas in Krakow is presented in this paper to mark its 10th anniversary. The origins of the Laboratory, its equipment and the design of borehole heat exchangers belonging to the field research station are also discussed. Recently, the construction of 14 new borehole heat exchangers was designed and the boreholes will be drilled in the area of AGH University. They will perform heating and cooling for the new S1 building of the University. Every borehole heat exchanger will be tested, with the effective thermal conductivity and borehole thermal resistivity calculated after a thermal response test on every borehole. The differ? ence between boreholes should show the difference of borehole thermal resistivity, but the effective thermal conductivity should be the same.Item type:Article, Access status: Open Access , Hydraulic fracturing in systems of geothermal energy utilization (EGS, HDR)(2012) Śliwa, Tomasz; Szura, Marcin; Gonet, Andrzej; Sapińska-Śliwa, AnetaThis work reviews possibility of using the heat from impermeable hot dry rock formations. Significant development in hydraulic fracturing technique in a last few years have a result in making accessible sources of energy from impermeable rocks, including hot dry rocks, which wasn't possible before. This paper presents the idea of utilization the EGS system which is based on forced and closed water circulation in a natural and permeable geological reservoir or in a reservoir, where the fractured zone was created artificially by for example hydraulic fracturing treatment. The article shows also an examples of recent EGS/HDR systems around the world.Item type:Article, Access status: Open Access , Specifying the number of borehole heat exchangers based on thermal response test and geoenergetic analysis(2017) Śliwa, Tomasz; Sapińska-Śliwa, Aneta; Gonet, Andrzej; Jezuit, Zbigniew; Bieda, Anna; Kowalski, Tomasz Wojciech; Ozimek, Jarosław; Złotkowski, AlbertFor the correct design, the number and the location of borehole heat exchangers, it is necessary to know thermal properties of rocks and the exchanger. This applies particularly to larger installations, more than 100 kW. One of the methods of determining these values is Thermal Response Test. This method is based on measurements in the first drilled borehole heat exchanger. Based on results of the TRT geothermal analysis is made. The analysis defines: the number of wells, the arrangement of wells, and the parameters of temperature of heat carrier after long-term use. This analysis based on calculations using specialist software. This paper presents the determination of the number of borehole heat exchangers and working conditions (temperature of the heat carrier) of an underground heat reservoir accessed using borehole heat exchangers for the building of the Primary School in Myszków.Item type:Article, Access status: Open Access , Comparative analysis of borehole heat exchanger use in different climatic conditions(2016) Śliwa, Tomasz; Decan, Gilles; Sapińska-Śliwa, Aneta; Bieda, Anna; Kowalski, Tomasz WojciechThe climatic conditions and the heating and cooling load between Ghent, Belgium, and Krakow, Poland, are compared. The cost of heating and cooling is calculated and compared. Heating in Belgium is done by using natural gas, just like in Poland, but due to higher gas prices, cost of heating is higher in Belgium than in Poland. That is why an interesting alternative for heating and cooling, namely borehole heat exchanger coupled with a heat pump, is calculated. This seems to be an economic and environmentally friendly alternative for heating and cooling.Item type:Article, Access status: Open Access , The analysis of heating output evaluation methods for borehole heat exchangers(2016) Śliwa, Tomasz; Grygieńcza, Andrzej; Bieda, Anna; Sapińska-Śliwa, Aneta; Gonet, Andrzej; Jaszczur, Marek; Kowalski, Tomasz WojciechProjects involving borehole heat exchangers more often need to undergo a series of tests before implementation. Inserted pipes and cement in the borehole may have diff erent thermal properties. Until recently, such values were determined in approximate, based on values taken from the literature. Special methods are used more often to perform this type of work in order to correctly determine the properties of a borehole heat exchanger. The aim of the study was to present an analysis of thermal properties of borehole heat exchangers with the main emphasis on parameters such as thermal conductivity and thermal resistance.The analyzed data was obtained through the use of three methods:– analysis of the lithological profi le with rock conductivity based on the literature,– analysis of natural temperature profi le in aborehole heat exchanger (logger NIMO-T),– thermal response test.Item type:Article, Access status: Open Access , The impact of graphite on the thermal conductivity of solidified grout(Wydawnictwa AGH, 2017) Śliwa, Tomasz; Kowalski, Tomasz Wojciech; Stryczek, Stanisław; Wiśniowski, Daniel; Bieda, Anna; Piwowarczyk, Sara; Beszłej, Jan; Naklicki, Mateusz; Sapińska-Śliwa, AnetaThe fast development of low-temperature geothermal energy affects the search for newer and newer solutions and materials used in the construction of borehole heat exchangers. One of the most important factors affecting the correct operation of heat pump systems with borehole heat exchangers is appropriately selected solidified grout. Solidifies grout has to be characterized by the highest thermal conductivity and good sealing borehole heat exchangers. The paper will present the impact of graphite on the thermal conductivity of solidified grout.Item type:Article, Access status: Open Access , The application of Vacuum Insulated Tubing in Deep Borehole Heat Exchangers(2017) Śliwa, Tomasz; Kruszewski, Michał; Assadi, Mohsen; Sapińska-Śliwa, AnetaThe world’s demand for energy is constantly increasing mainly due to population growth and improved living standards. Currently, the share of electricity generation is 37% of the global primary energy consumption. Fossil-based electricity production is accounted for 68% of the total generation with coal, the most carbon-intensive fossil fuel, being the largest contributor (41%) to the world’s electricity supply in 2012. Electricity demand is projected to grow rapidly and is also expected to be 70% higher in 2035, than the current demand. The Polish energy sector is heavily dependent on coal, resulting in large $CO_2$ emission per capita. Poland has considerable potential for geothermal energy production, as there is a large number of deep, abandoned wells that might be utilized for geothermal energy production. Utilizing these resources would contribute to the $CO_2$ emission reduction without negative impact on security of energy supply. Following paper describes method of reconstructing negative or abandoned oil and gas wells for Deep Borehole Heat Exchangers (DBHE). In many old boreholes, exploiting underground geothermal waters is impossible, thus adaptation for DBHE is sometimes the only option to utilize geothermal heat reservoirs. The insulated coaxial inner column which enables the circulation of heat carrier plays the crucial role in effective functioning of DBHE systems. Vacuum Insulated Tubing (VIT) can improve heat production as well as increase efficient energy use. This technique found plethora of applications in offshore and onshore deep drilling and production. Throughout recent years, VIT technology is being more commonly applied in geothermal industry. Negative or abandoned wells could be reconstructed for DBHE. To maximize the heat uptake from such boreholes, it is advised to use inner column made from material with lowest possible thermal conductivity coefficient. Article deals with possible application of vacuum pipes as inner column in deep coaxial borehole heat exchangers.