Yazar "Jakubowski, Tomasz" seçeneğine göre listele

Listeleniyor 1 - 9 / 9
  • [ X ]
    Öğe
    Analysis of Greenhouse Gas Emissions and Energy Consumption Depending on the Material and Construction Solutions and the Energy Carrier Used-A Case Study
    (Mdpi, 2024) Nawalany, Grzegorz; Sokolowski, Pawel; Jakubowski, Tomasz; Atilgan, Atilgan
    The article presents the results of research on the impact of material and construction solutions on energy demand and greenhouse gas emissions. Field research was conducted in an existing free-standing greenhouse located in southern Poland. The research period covered the entire calendar year. The measurement data were used in the next step to validate the computational model using the numerical method of elementary balances. The data distribution was also analyzed in terms of basic statistics. The validated and verified model was used in the further part of the analysis to conduct computer simulations for three variants, differing in terms of material and construction solutions. The variants included: no foundation insulation, extruded polystyrene (XPS) insulation and the use of single-chamber polycarbonate panels with thermal insulation of the foundations. The obtained results showed a high agreement between theoretical and real data (85-89% for the coefficient of determination (R2) and 84-88% for the GOF method). In the case of variant 1, which in terms of material and construction solutions corresponded to the actual construction of the greenhouse, it was found that the annual energy demand for heating purposes amounted to 153,234 kWh/year. In variant 2, in which additional thermal insulation relative to the zero state was used, the energy demand for heating purposes was lower and amounted to 147,704 kWh/year. The lowest heat load was characteristic of variant 3, in which 116,294 kWh/year was required to cover heating needs. The variant with polycarbonate and foundation insulation brought energy savings of 24% and a reduction of CO2 emissions by 24%. In addition, replacing fuel from hard coal with natural gas brought significant benefits, reducing pollutant emissions by 51%. The paper is a new approach to the use of the mentioned numerical method for the assessment of gaseous pollutant emissions in this type of building based on numerical simulations of energy consumption.
  • [ X ]
    Öğe
    Determination of Performance of Different Pad Materials and Energy Consumption Values of Direct Evaporative Cooler
    (Mdpi, 2024) Jakubowski, Tomasz; Boyaci, Sedat; Kociecka, Joanna; Atilgan, Atilgan
    The purpose of this study is to determine the performances of luffa and greenhouse shading netting (which can be used as alternatives to commercial cellulose pads, that are popular for cooling greenhouses), the contribution of external shading to the evaporative cooling performance, and the energy consumption of the direct evaporative cooler. In this experiment, eight different applications were evaluated: natural ventilation (NV), natural ventilation combined with external shading net (NV + ESN), cellulose pad (CP), cellulose pad combined with external shading net (CP + ESN), luffa pad (LP), luffa pad combined with external shading net (LP + ESN), shading net pad (SNP), and shading net pad combined with external shading net (SNP + ESN). The cooling efficiencies of CP, CP + ESN, LP, LP + ESN, SNP, and SNP + ESN were found to be 37.6%, 45.0%, 38.9%, 41.2%, 24.4%, 29.1%, respectively. Moreover, their cooling capacities were 2.6 kW, 3.0 kW, 2.8 kW, 3.0 kW, 1.7 kW, 2.0 kW, respectively. The system water consumption values were 2.9, 3.1, 2.8, 3.2, 2.4, 2.4 l h-1, respectively. The performance coefficients of the system were determined to be 10.2, 12.1, 11.3, 11.9, 6.6, 7.8. The system's electricity consumption per unit area was 0.15 kWh m-2. As a result of the study, it was determined that commercially used cellulose pads have advantages over luffa and shading net materials. However, luffa pads can be a good alternative to cellulose pads, considering their local availability, initial cost, cooling efficiency, and capacity.
  • [ X ]
    Öğe
    Effect of stimulation with variable magnetic field of wheat seeds for various technological purposes
    (Wydawnictwo Sigma-Not Sp Zoo, 2022) Jakubowski, Tomasz; Syrotyuk, Serhiy; Lopushniak, Vasyl; Atilgan, Atilgan
    The aim of the study was to determine the reaction of wheat (Triticum aestivum L.) seeds for various technological purposes to a variable magnetic field. In the experiment, a stand with the RC OSCILLATOR TYPE G502 system generating sinusoidal and square signals with frequencies in the range of 0-100 Hz was used. The magnitude of the magnetic field induction was used: 10, 40 and 70 mT and the seed exposure time: 10, 600 and 1800 s. A significant influence of the alternating magnetic field on some ontogenetic parameters of plants was demonstrated.
  • [ X ]
    Öğe
    Numerical Analysis of the Effect of Floor Depression on the Extent of Thermal Interaction with the Ground and Energy Management Using a Vegetable Cold Store as an Example
    (Mdpi, 2024) Sokolowski, Pawel; Jakubowski, Tomasz; Nawalany, Grzegorz; Atilgan, Atilgan; Syrotyuk, Serhiy
    The thermal interaction between cooling facilities and the ground is most often discussed in terms of the appropriate insulation of building partitions. Unfortunately, there is little information about the potential of using ground thermal accumulation to support the shaping of the microclimate in cooling facilities by embedding them in the ground. This problem is particularly important in the context of striving to reduce the energy demand of buildings. The article discusses a new scientific problem related to the effect of vegetable cold storage floors being recessed into the ground on the surrounding land's impact range and on its energy management. Validation of the numerical model was performed based on actual year-round field surveys. These surveys were conducted in a free-standing vegetable cold storage facility located in southern Poland. The results of the study allowed us to determine the contribution of the land to the energy balance of the cold storage. A floor recessed into the ground doubled the ground's contribution to the energy balance. The most important research results showed that the range of thermal impact on the surrounding ground also increased by 2.0 m more than that of a building with the floor located at ground level. An evaluation of the heat flow between the cold storage and the ground in the cases analyzed was also carried out. The analysis of the ground heat exchange balance on an annual basis showed high energy gains of 2055 kWh. The total energy demand for cooling was 1723 kWh, while it was 1204 kWh for heating. The results of the analysis of the heat exchange intensity between the indoor air and the ground showed that the ground contribution accounted for 16.6% of the total energy balance of the cold storage. The highest energy gains from the ground were found in October and amounted to 478 kWh. Due to the summer shutdown, there was an intense heat flow to the ground in July, which amounted to 588 kWh.
  • [ X ]
    Öğe
    Numerical analysis of the heat exchange model with the ground on the example of a complex of industrial halls
    (Elsevier Science Sa, 2023) Nawalany, Grzegorz; Sokolowski, Pawel; Lendelova, Jana; Zitnak, Miroslav; Jakubowski, Tomasz; Atilgan, Atilgan
    This paper describes the process of validation of the numerical model and its calibration, based on long-term field studies that were carried out at a growing tunnel system for Agaricus bisporus in southern Poland. A verification of uncertainty indices was undertaken, based on which the applicability of the model for further research and analysis was assessed according to commonly used guidelines. WUFI (R) plus software was applied based on the numerical elementary balance method (EBM). The HVAC system was also simulated in order to reflect actual conditions as accurately as possible. The correctness of the model was assessed by means of uncertainty indicators in the form of the normalised mean deviation error (NMBE) and the Coefficient of Variation of the Root Mean Square Error CV (RMSE). The analysis provided an opportunity to highlight the validity of the calculations, considered reliable under the criteria adopted. It also pointed out some limitations of the model applied, resulting in negative calibration results for a small number of selected measurement monitors. Using the validated calculation model, heat flows from the ground to the building and the other way around were estimated. The specifics of the building contributed to the occurrence of heat gain from the ground being 20 times larger compared to energy losses to the ground. This opens up a potential path for extending the numerical analysis to optimise energy management for the investigated facility and to determine the thermal interaction between buildings in the surveyed area.
  • [ X ]
    Öğe
    Numerical Analysis of Thermal Impact between the Cooling Facility and the Ground
    (Mdpi, 2022) Sokolowski, Pawel; Nawalany, Grzegorz; Jakubowski, Tomasz; Popardowski, Ernest; Lopushniak, Vasyl; Atilgan, Atilgan
    The article presents the results of research on the range of the impact of a cooling facility on the surrounding ground. An analysis of the heat exchange with the ground and through the building partitions was carried out. The analysis was carried out on the basis of the results of actual field tests carried out throughout the measurement year. The object of the research was an agricultural cold store located in southern Poland. The computational analysis of the interaction between the cooling facility and the ground was based on the numerical elementary balances method. The validation of the calculation model was performed based on the adopted boundary conditions. Calculations for the analyzed variants were carried out on the basis of a geometric model of the cooling facility built in the WUFI (R) plus program, corresponding to the actual dimensions. The analysis of the energy balance of the studied facility showed that the share of energy flow through the floor to the ground constitutes 8.2% of all energy flows through other partitions and the ventilation system. In order to maintain the set air temperature inside the studied building, intensive cooling was required with an energy demand of 5184.5 kWh/year. The results of the research showed that the range of the thermal impact of the building changes depending on the location of the studied ground area in terms of cardinal direction. The external and internal microclimate characteristics also affect the extent of the impact of the cooling facility on the surrounding ground. Under the assumption of stable values of circle minus(i) within a range of 0.0-4.0 degrees C, the largest range of influence (4.0 m) occurs in the summer.
  • [ X ]
    Öğe
    Response of Solanum tuberosum L. to drip irrigation and nitrogen application: productivity, nutrition composition, bioactive compounds, antioxidant activity
    (Inst Ochrony Roslin, Panstwowy Inst Badawczy, 2024) Jakubowski, Tomasz; Stanislaw, Rolbiecki; Roman, Rolbiecki; Dorota, Wichrowska; Anna, Figas; Barbara, Jagosz; Atilgan, Atilgan
    Sustainable crop cultivation is a crucial goal in modern agriculture, aiming to attain high productivity while conserving natural resources. This requires the implementation of rational cultivation techniques, with proper irrigation and fertilization practices playing a crucial role in ensuring plant well-being and providing natural protection against biotic and abiotic stresses. The health-promoting properties of crops are also significantly influenced by irrigation and fertilization. This study investigated the productivity, nutritional composition, bioactive compounds, and antioxidant capacity of Vineta early potato cultivar tubers under drip irrigation conditions, combined with nitrogen fertilization through fertigation or broadcasting. Two-factor trials included drip irrigation (control or drip) and nitrogen application (broadcast or fertigation). Precise treatments, such as drip irrigation and N-fertigation were found to enhance all productivity traits. Both practices positively impacted tuber nutrient content. The highest levels of total polyphenols and chlorogenic acid were observed in non-irrigated and broadcasted tubers. Drip-irrigated and N-fertigated tubers exhibited high levels of vitamin C and antioxidant activity. In summary, the combination of drip irrigation with appropriate fertilization methods positively influenced potato crops, as evidenced by an increase in productivity and the quality of tubers.
  • [ X ]
    Öğe
    Result of seeds Lepidium sativum L. exposure to ionizing radiation
    (Wydawnictwo Sigma-Not Sp Zoo, 2022) Ciechanowski, Marek; Bolewski, Andrzej; Dudala, Joanna; Jakubowski, Tomasz; Syrotyuk, Serhiy; Lopushniak, Vasyl; Atilgan, Atilgan
    Ionizing radiation causes ionization and / or excitation of atoms of the material medium with which it interacts. Depending on the mechanism of interaction, we speak of direct and indirect ionizing radiation. The first group includes electrically charged particles (alpha, beta, protons), which ionize mainly by Coulomb interactions. On the other hand, neutral particles (e.g. neutrons) and high-energy electromagnetic radiation (X and. rays) interact with matter indirectly through the photoelectric effect, Compton scattering, electron-positron pair production, and also by nuclear reactions. The paper presents the result of an experiment in which seeds Lepidium sativum L. were exposed to neutron radiation. A commercial Cf-252 neutron source was used in the experiment (source activity on the day of the experiment A = 11 MBq, yield of neutron source W = 1.34E + 6 n/s,) [5-7]. The exposure time ranged from 5 seconds to 11 hours.
  • [ X ]
    Öğe
    The Benefits of Green Roofs and Possibilities for Their Application in Antalya, Turkey
    (Mdpi, 2025) Ertop, Hasan; Atilgan, Atilgan; Jakubowski, Tomasz; Kociecka, Joanna
    Rapid population growth, urbanization, and industrialization have many negative environmental effects. These adverse effects are felt more in urban areas than in rural areas. Considering the high rate of urban development, the idea that green roof structures can be used on rooftops is important in reducing the current negative effects. In addition, water retention on these roof areas can be helpful in the face of drought periods. In this study, the amount of water that can be retained on a 100 m2 roof area in Antalya Province, Turkey was calculated. As a result, it was determined that August is the month when the least water can be retained due to rainfall. It was calculated that between 0.168 m3 and 0.363 m3 of water can be retained in August. Furthermore, the month in which the most water can be retained due to rainfall is December, and the amounts of water that can be retained are between 5.762 m3 and 21.640 m3. These calculated values are anticipated to be important in understanding how much water can be retained in the planned green roofs. In addition, it has been determined that the energy savings that can be made for heating purposes in a 100 m2 green roof area can be between 3900 kWh and 11,250 kWh.