Wyniki wyszukiwania - BazTech

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Analysis of the potential of electro-waste as a source of hydrogen to power low-emission vehicle powertrains

Wesołowski Mateusz, Hamid Mohamad, Mońka Piotr, Janicka Anna

Combustion Engines

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2024

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R. 63, nr 1

126--133

EN

The decarbonisation of transport is one of the key aspects in the context of environmental protection. These emissions are particularly noticeable in highly urbanised areas, where the possibility of dispersal of harmful substances is much lower. A way to improve emission factors is the introduction of hydrogen vehicles. Burning hydrogen in engines significantly reduces emissions of harmful substances into the atmosphere compared to the combustion of conventional fuels used today. Hydrogen can be obtained by gasifying waste in a steam atmosphere. Electronic waste is a special type of waste characterised by a high degree of commingling, which makes it difficult to treat. The volume of this type of waste is increasing year on year. As a result of this process, we are able to obtain syngas. This gas, after separation processes, can be a source of hydrogen, an energy carrier that could prove crucial in low-carbon energy or transport applications. This paper presents the results of the gasification of electronic waste, the composition of the syngas obtained in the process and an assessment of the potential of this waste treatment technology to power means of transport.

2

Wpływ sposobu regulacji natężenia przepływu wody w Recyrkulacyjnych Systemach Akwakulturowych (RAS) na straty energii

Józefowicz Łukasz, Janicka Anna, Zawiślak Maciej, Sobianowska-Turek Agnieszka

Gaz, Woda i Technika Sanitarna

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2023

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Nr 9

21--25

PL

Recyrkulacyjne systemy akwakultury (RAS) stają się przyszłością intensywnej hodowli owoców morza i ryb, ponieważ tylko w RAS możliwa jest intensywna hodowla owoców morza i ryb w pełni kontrolowanym środowisku, przy oszczędnej gospodarce zasobami pierwotnymi. Recyrkulacyjny system akwakultury jest hodowlą biodynamicznym, z jednoczesnym znikomym wpływem na otaczające go ekosystemy, wpisującym się idealnie w gospodarka o obiegu zamkniętym (GOZ). W mniejszej pracy zaprezentowano wyniki wpływ sposobu regulacji natężenia przepływu wody w Recyrkulacyjnych Systemach Akwakulturowych (RAS) na straty energii wykazując, że pod kątem strat energii optymalną metodą regulacji natężenia przepływu wśród przebadanych jest wykorzystanie zaworu gilotynowego. Metoda ta charakteryzuje się najmniejszymi stratami energii w całym zakresie regulacji, umożliwia płynne sterowanie natężeniem przepływu, a dzięki sposobowi ustawiania stopnia zamknięcia zaworu za pomocą wysuwania dźwigni daje prosty sposób uzyskania żądanego stopnia introwersji.

EN

Recirculating aquaculture systems (RAS) are becoming the future of intensive seafood and fish farming, because only in RAS is it possible to intensively farm seafood and fish in a fully controlled environment with efficient management of primary resources. The recirculating aquaculture system is biodynamic farming with a minimal impact on the surrounding ecosystems, which fits perfectly into the circular economy (circular economy). A smaller paper presents the results of the influence of the method of regulating the water flow rate in Recirculating Aquaculture Systems (RAS) on energy losses, showing that in terms of energy losses, the optimal method of regulating the flow rate among those tested is the use of a guillotine valve. This method is characterized by the lowest energy losses over the entire adjustment range, enables smooth control of the flow rate, and thanks to the method of setting the valve closing degree by extending the lever, it provides a simple way to obtain the desired degree of introversion.

3

Numerical optimization of the BAT-CELL Bio-Ambient-Tests method for engine exhausts toxicity evaluation

Kęska Aleksandra, Janicka Anna, Zawiślak Maciej

Combustion Engines

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2023

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R. 62, nr 1

19--25

EN

The BAT-CELL Bio-Ambient-Tests method is based on the assessment of the influence of the actual toxicity of various types of gas mixtures on living cells, taking into account the additive synergism. Work has been carried out on the application of the BAT-CELL method for testing engine exhaust gases. The application of computational fluid mechanics using Ansys Fluent made it possible to analyse the flow of engine exhaust gases through the aspiration system used, including analysis of shear stress values and their uniformity distribution on the bottom wall of the sampler containing cell culture on the bottom wall of the sampler. The appropriate flow rate of exhaust gases through the aspiration system and the shape of aspiration tubing for the sampler were selected in order to enable uniform contact of gas particles with the cell surface and not to damage them mechanically. The simulation results were verified in real-life tests and confirmed the theoretical assumptions.

4

Optimization of the electric bus radiator design in terms of noise emissions and energy consumption by computational fluid dynamics

Janicka Anna, Zawiślak Maciej, Głogoza Artur, Włostowski Radoslaw

Combustion Engines

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2022

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R. 61, nr 4

41--50

EN

The paper presents the numerical optimization of an innovative radiator for use in electric buses in terms of energy consumption and noise emission. Computational fluid dynamics simulations were performed. The flow of the cooling medium was modeled using the RANS method. The two-equation k-ɛ turbulence model, the heat transfer model and the acoustic model were used. According to the research results, the separation of the air stream in individual fan sections contributes to the improvement of energy efficiency and reduces noise emissions. As a result of the simulation, it was found that the best solution in terms of noise emission as well as the occurring flow phenomena caused about a 2 dB decrease of maximum values of the noise level and allowed the equalization of the cooling medium velocity (prevailing velocity range between 4 and 9 m/s). The results of the simulations were verified under laboratory and field conditions, showing a very good convergence of the model with the results of the experiments (i.e. the maximum noise level was estimated at 57 dB, under measurement conditions for the same operating point at 59 dB) while maintaining the baseline energy demand, which indicates a new approach in the method of shaping internal elements of electric vehicle coolers.

5

Designing a Small Water Power Plant in Poland in the Aspect of Minimizing the Impact on River Ecosystem

Janicka Anna, Molska Justyna, Świeściak Joanna, Włostowski Radosław, Włóka Adriana, Zawiślak Maciej

Rocznik Ochrona Środowiska

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2021

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Tom 23

332--345

EN

A small hydro-power plant designing in aspect of current legislation is an interdisciplinary problem because of the fact that efficiency priority is not so important as ecological one. In this article the regulations concerning permissions for plant operation are discussed. The small hydro-power plant designing criteria are presented in the aspect of a plant impact on the river ecosystem.

6

Researches on a photocatalytic device for toxic hydrocarbons removal from IC engine exhausts

Górniak Aleksander, Janicka Anna, Michniewicz Daniel, Molska Justyna, Skrętowicz Maria, Świeściak Joanna, Włostowski Radoslaw, Zawiślak Maciej

Combustion Engines

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2019

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R. 58, nr 4

151--155

EN

Hydrocarbons, especially aromatic volatile organic compounds (AVOCs) and polyaromatic hydrocarbons (PAHs), emitted by IC engines, indisputably have a negative impact on the environment and public health. Even though current legislation strongly impacts on their low concentration in the exhausts, not quantity but the quality of those substances determines fumes toxicity. The paper presents results of the researches on a photocatalytic device dedicated to BTX (benzene-toluene-xylene) removal from IC engine exhausts, which can be applied in a vehicle cabin ventilation system. According to the results, the system is able to decrease toxic compounds concentration (caused by mobile emission sources) in inlet-air delivered to the vehicle interior. In effect, the system application reduces the users of a vehicle to exposure on contaminants.