2023 - Repozytorium publikacji - Politechnika Gdańska

Pokaż publikacje z roku

Publikacje z roku 2023

Pokaż wszystkie

Modern era fortifications as public places = Fortyfikacje nowożytne jako miejskie przestrzenie publiczne
- Grzegorz Bukal
2023 Pełny tekst Ochrona Dziedzictwa Kulturowego
Fortyfikacje nowożytne tworzyły systemy budowli ziemnych oraz szerokich fos. Ich powierzchnia przekraczała często powierzchnię otoczonego nimi miasta. Utrata znaczenia obronnego oraz tendencje do wzrostu terytorialnego miast spowodowały konieczność zmiany funkcji fortyfikacji. W XIX i XX wieku były one rozbierane, a ich tereny zabudowywane lub przekształcane w przestrzeń publiczną. Zagospodarowanie i konserwacja tych obiektów są jednak problematyczne, zarówno ze względu na ich charakterystykę techniczną, jak i związane z ich przekształceniem konflikty interesów ekonomicznych, prawno-administracyjnych, urbanistycznych, krajobrazowych i ekologicznych.
Modifications to the anaerobic digestion model no. 1 (ADM1) for enhanced understanding and application of the anaerobic treatment processes – A comprehensive review
- Rongrong Mo
- Wenjie Guo
- Damien Batstone
- Jacek Mąkinia
- Yongmei Li
2023 WATER RESEARCH
Anaerobic digestion (AD) is a promising method for the recovery of resources and energy from organic wastes. Correspondingly, AD modelling has also been developed in recent years. The International Water Association (IWA) Anaerobic Digestion Model No. 1 (ADM1) is currently the most commonly used structured AD model. However, as substrates become more complex and our understanding of the AD mechanism grows, both systematic and specific modifications have been applied to the ADM1. Modified models have provided a diverse range of application besides AD processes, such as fermentation and biogas upgrading processes. This paper reviews research on the modification of the ADM1, with a particular focus on processes, kinetics, stoichiometry and parameters, which are the major elements of the model. The paper begins with a brief introduction to the ADM1, followed by a summary of modifications, including extensions to the model structure, modifications to kinetics (including inhibition functions) and stoichiometry, as well as simplifications to the model. The paper also covers kinetic parameter estimation and validation of the model, as well as practical applications of the model to a variety of scenarios. The review highlights the need for improvements in simulating AD and biogas upgrading processes, as well as the lack of full-scale applications to other substrates besides sludge (such as food waste and agricultural waste). Future research directions are suggested for model development based on detailed understanding of the anaerobic treatment mechanisms, and the need to recover of valuable products.
Modified Peptide Molecules As Potential Modulators of Shelterin Protein Functions; TRF1
- Wioletta Brankiewicz
- Umesh Kalathiya
- Monikaben Padariya
- Katarzyna Wegrzyn
- Maciej Prusinowski
- Joanna Żebrowska
- Agnieszka Zylicz-Stachula
- Piotr Skowron
- Marek Drab
- Mariusz Szajewski
- Maciej Ciesielski
- Małgorzata Gawrońska
- Anoop Kallingal
- Mariusz Makowski
- Maciej Bagiński
2023 Pełny tekst CHEMISTRY-A EUROPEAN JOURNAL
In this work, we present studies on relatively new and still not well-explored potential anticancer targets which are shelterin proteins, in particular the TRF1 protein can be blocked by in silico designed "peptidomimetic" molecules. TRF1 interacts directly with the TIN2 protein, and this protein-protein interaction is crucial for the proper functioning of telomere, which could be blocked by our novel modified peptide molecules. Our chemotherapeutic approach is based on assumption that modulation of TRF1-TIN2 interaction may be more harmful for cancer cells as cancer telomeres are more fragile than in normal cells. We have shown in vitro within SPR experiments that our modified peptide PEP1 molecule interacts with TRF1, presumably at the site originally occupied by the TIN2 protein. Disturbance of the shelterin complex by studied molecule may not in short term lead to cytotoxic effects, however blocking TRF1-TIN2 resulted in cellular senescence in cellular breast cancer lines used as a cancer model. Thus, our compounds appeared useful as starting model compounds for precise blockage of TRF proteins.
MOF/TiO2 erythrocyte-like heterostructures decorated by noble metals for use in hydrogen photogeneration and pollutant photodegradation
- Mateusz Baluk
- Paweł Mazierski
- Aleksandra Pieczyńska
- Kostiantyn Nikiforow
- Grzegorz Trykowski
- Tomasz Klimczuk
- Adriana Zaleska-Medynska
- Mateusz Adam Baluk
2023 Catalysis Science & Technology
Various metal–organic framework (MOF)/TiO2 heterostructures can be obtained by the partial hydrolysis or calcination of Ti-based MOFs. By adjusting the hydrolysis and calcination steps of NH2-MIL-125 (Ti), a novel photoactive material composed of a MOF (NH2-MIL-125 (Ti)) and TiO2, with a unique “erythrocyte” shape, was developed. Furthermore, modification of the composition prepared by the partial hydrolysis of NH2- MIL-125 (Ti) (h-MOF) using Au, Ag, Pt, or Pd metal nanoparticles resulted in a significant increase in the efficiency of hydrogen photogeneration. Higher photocatalytic properties are associated with the excitation of MOFs and TiO2, electron transfer, and electron accumulation on nanoparticles. Using the optimal hMOF/Au photocatalyst, 117 μmol g−1 h−1 of hydrogen was produced. On the other hand, composites (chMOFs) obtained by calcination of h-MOFs after modification with Au showed high efficiency in the photodegradation of phenol under the threshold of visible radiation (over 42 μmol dm−3 h−1 ). These properties are related to the generation of electrons by Au nanoparticles because of the corresponding localized surface plasmon resonance. This results in the formation of reactive oxygen species (hydroxyl and superoxide radicals) that decompose organic pollutants. Overall, the obtained materials have high porosity and photocatalytic stability, which are important for photocatalytic processes.
Molecular mechanism and energetics of coupling between substrate binding and product release in the F 1 -ATPase catalytic cycle
- Michał Badocha
- Miłosz Wieczór
- Antoni Marciniak
- Cyprian Kleist
- Helmut Grubmüller
- Jacek Czub
2023 Pełny tekst PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
F1-ATPase is a motor protein that couples the rotation of its rotary γ subunit with ATP synthesis or hydrolysis. Single-molecule experiments indicate that nucleotide binding and release events occur almost simultaneously during the synthesis cycle, allowing the energy gain due to spontaneous binding of ADP to one catalytic β subunit to be directly harnessed for driving the release of ATP from another rather than being dissipated as heat. Here, we examine the unknown mechanism of this coupling that is critical for an exceptionally high mechanochemical efficiency of F1-ATPase by means of all-atom free-energy simulations. We find that nondissipative and kinetically fast progression of the motor in the synthesis direction requires a concerted conformational change involving the closure of the ADP-binding β subunit followed by the gradual opening of the ATP-releasing β subunit over the course of the 30 to 40° rotary substep of the γ subunit. This rotary substep, preceding the ATP-dependent metastable state, allows for the recovery of a large portion of the ADP binding energy in the conformation of ATP-bound β that gradually adopts the low-affinity conformation, captured also by the recent cryo-EM structure of this elusive state. The release of ATP from this nearly open conformation leads to its further opening, which enables the progression of the motor to the next catalytic metastable state. Our simulations explain this energy conversion mechanism in terms of intersubunit and ligand–protein interactions.
Monitoring of a historic sacral building on an example Basilica St. Nicholas in Gdańsk
- Tomasz Majewski
- Maciej Niedostatkiewicz
2023 Pełny tekst Inżynieria Bezpieczeństwa Obiektów Antropogenicznych
he paper describes the case of monitoring the technical condition of a historic sacral building after a failure and during renovation works. In order to monitor the condition of the building, safely conduct diagnostic work, identify the causes of failures andsafely carry out renovation works, a detailed Facility Monitoring Program has been developed, which has been implemented, is operational and is a source of valuable data used to assess the current condition of the facility.
Monitorowanie oddziaływania ruchu kolejowego na środowisko - koncepcje i metody realizacji.
- Piotr Chrostowski
- Andrzej Wilk
- Krzysztof Karwowski
- Sławomir Grulkowski
- Roksana Licow
- Wojciech Rafajłowicz
- Adam Ratajczak
- Radosław Idzikowski
- Marek Szafrański
- Tadeusz Widerski
- Karol Daliga
- Jacek Skibicki
- Leszek Jarzębowicz
- Michał Michna
- Sławomir Judek
- Paweł Bawolski
- Roman Grot
- Julia Omilianowicz
2023
W artykule przedstawiono podstawowe założenia projektu badawczego, realizowanego w ramach Wspólnego Przedsięwzięcia NCBR i PKP PLK pn. „Badania i Rozwój w Infrastrukturze Kolejowej – BRIK 2”, dotyczącego opracowania systemu monitorującego, integrującego i przetwarzającego gromadzone dane związane z hałasem i drganiami na potrzeby zarządzania procesami utrzymaniowymi i inwestycyjnymi zarządcy infrastruktury kolejowej. W efekcie końcowym powstanie prototyp przenośnego, elastycznego funkcjonalnie systemu pomiarowego, złożonego z zestawu odpowiednich sensorów rozlokowanych w przestrzeni obejmującej wyselekcjonowany obszar wzdłuż linii kolejowej. W rezultacie powstanie kompleksowe narzędzie do pomiaru, analizy i automatycznego wsparcia procesów decyzyjnych.
Monolithic capsule phase microextraction prior to gas chromatography-mass spectrometry for the determination of organochlorine pesticides in environmental water samples
- Antonio Ferracane
- Natalia Manousi
- Abuzar Kabir
- Kenneth G. Furton
- Peter Q. Tranchida
- George A. Zachariadis
- Justyna Płotka-Wasylka
- Luigi Mondello
- Victoria F. Samanidou
- Erwin Rosenberg
2023 MICROCHEMICAL JOURNAL
In this study, a capsule phase microextraction (CPME) protocol followed by gas chromatography-mass spectrometry is proposed for the accurate and sensitive monitoring of organochlorine pesticides (OCPs) in environmental water samples. Different monolithic sol–gel encapsulated sorbents were compared and monolithic sol–gel poly(ethylene glycol)-based sorbent incorporated into porous microextraction capsules resulted in the highest extraction efficiency. Following the selection of the microextraction device, the CPME conditions were optimized, while linearity, limits detection (LODs), limits of quantification (LOQs), accuracy, and precision were the figures-of-merit measured. Under optimum conditions the LODs for the OCPs ranged between 0.01 ng mL−1 and 0.03 ng mL−1. The relative standard deviations were better than 5.3 % and 9.2 % for intra-day and inter-day study, respectively. The relative recoveries ranged between 90.5 and 105.2 % (intra-day) and 93.0–105.0 % (inter-day), demonstrating good method trueness. Finally, the proposed protocol was implemented for the monitoring of OCPs in tap, river, pond, and lake water. The developed method presents better analytical features than existing methods.
Monte Carlo simulations of the fracture resistance degradation of asphalt concrete subjected to environmental factors
- Cezary Szydłowski
- Łukasz Smakosz
- Marcin Stienss
- Jarosław Górski
2023 Pełny tekst Archives of Civil Engineering
The paper presents the results of laboratory tests of SCB (semi-circular beam) samples of asphalt concrete, subjected to the destructive effect of water and frost as well as the aging processes. The determined values of material parameters show significant dispersions, which makes the design of mixtures difficult. Statistical analysis of the test results supplemented by computer simulations made with the use of the proprietary FEM model was carried out. The main distinguishing feature of the model is the assignment of material parameters of coarse aggregate and bituminous mortar to randomly selected finite elements. The parameters of the mortar are selected by trial and error to match the numerical results to the experimental ones. The stiffness modulus of the bituminous mortar is, therefore, a substitute parameter, taking into account the influence of many factors, including material degradation resulting from the aging and changing environmental conditions, the influence of voids, and contact between the aggregate and the bituminous mortar. The use of the Monte Carlo method allows to reflect the scattering of the results obtained based on laboratory tests. The computational algorithm created in the ABAQUS was limited only to the analysis of the global mechanical bending response of the SCB sample, without mapping the failure process in detail. The combination of the results of laboratory tests usually carried out on a limited number of samples and numerical simulations provide a sufficiently large population of data to carry out a reliable statistical analysis, and to estimate the reliability of the material designed.
Morphology control through the synthesis of metal-organic frameworks
- Justyna Łuczak
- Malwina Kroczewska
- Mateusz Baluk
- Jakub Sowik
- Paweł Mazierski
- Adriana Zaleska-Medynska
- Mateusz Adam Baluk
2023 Pełny tekst ADVANCES IN COLLOID AND INTERFACE SCIENCE
Designable morphology and predictable properties are the most challenging goals in material engineering. Features such as shape, size, porosity, agglomeration ratio significantly affect the final properties of metal- organic frameworks (MOFs) and can be regulated throughout synthesis parameters but require a deep under- standing of the mechanisms of MOFs formation. Herein, we systematically summarize the effects of the indi- vidual synthesis factors, such as pH of reaction mixture, including acidic or basic character of modulators, temperature, solvents types, surfactants type and content and ionic liquids on the morphology of growing MOFs. We identified main mechanisms of MOFs’ growth leading to different morphology of final particles and next systematically discuss the effect of miscellaneous parameters on MOFs morphology based on the main mecha- nisms related to the nucleation, growth and formation of final MOFs structure, including coordination modu- lation, protonation/deprotonation acting and modulation by surfactants or capping agents. The effect of microwaves and ultrasound employment during synthesis is also considered due to their affecting especially nucleation and particles growing steps during MOFs formation
MoS2-containing composite membranes for separation of environmental energy-relevant liquid and gas mixtures: A comprehensive review
- Farooque Janjhi
- Imamdin Chandio
- Dahar Janwery
- Ayaz Ali Memon
- Khalid Hussain Thebo
- Grzegorz Boczkaj
- Vahid Vatanpour
- Roberto Castro Munoz
2023 CHEMICAL ENGINEERING RESEARCH & DESIGN
Molybdenum sulfide (MoS2) materials adapted into membranes have demonstrated potential for different areas dealing with molecular separations. For instance, MoS2-based membranes have been proposed for distinct environmental applications, such as water treatment, seawater desalination, gas separation, and solvent separation. Emergently, such membranes have been ultimately investigated for energy-relevant gas separation mixtures, such as CO2 separation, H2 purification, and bioethanol upgrading, among others. Therefore, this review elucidates the latest research (over the last three years) on MoS2-based membranes facing previous approaches. Firstly, a brief introduction to the physiochemical properties of MoS2-based materials. Secondly, a particular emphasis has been devoted to fabrication procedures and their effects on molecular separation in membrane processes, highlighting the most relevant outcomes and the transport mechanism reported by the research community in water treatment and purification, gas separation, and pervaporation. Finally, an analysis is conducted on the separation and stability mechanisms associated with membranes consisting of layer-stacked MoS2. This research endeavor progressions in MoS2-based membranes, consequently fostering the advancement of further membranes derived from two-dimensional materials. These membranes exhibit potential for improving efficiency and mitigating the energy consumption linked to water treatment and purification processes.
Most Kolejowy im. Ernesta Malinowskiego przez rzekę Wisłę w Toruniu. Eksperymentalna identyfikacja współczynnika dynamicznego elementów pomostu.
- Krzysztof Żółtowski
- Przemysław Kalitowski
- Mikołaj Binczyk
2023
W artykule omówiono problematykę obliczania współczynnika dynamicznego poprzecznicy końcowej klasycznego mostu kratowego z jezdnią otwartą. Zwrócono uwagę na możliwość obliczenia współczynnika dynamicznego w zależności od źródła naprężeń. Przykład obliczeniowy wykazał 30% redukcję wartości naprężeń od ruchomych obciążeń w SGN przy nierównomiernym współczynniku dynamicznym. Obliczenia numeryczne i badania terenowe przeprowadzono z wykorzystaniem czujników tensometrycznych. Walidację numerycznego modelu MES przeprowadzono poprzez porównanie obliczeń dynamicznych dla pociągu testowego z wynikami pomiarów. W badaniach terenowych rozpatrywanego mostu uzyskano znacznie niższe wartości współczynników przewyższenia dynamicznego niż te, które podyktował normowy współczynnik dynamiczny. Przeprowadzono również obliczenia numeryczne przy użyciu pociągów HSLM i Real Trains w celu zidentyfikowania współczynnika wzmocnienia dynamicznego.
Motion Trajectory Prediction in Warehouse Management Systems: A Systematic Literature Review
- Jakub Belter
- Marek Hering
- Paweł Weichbroth
2023 Pełny tekst Applied Sciences-Basel
Background: In the context of Warehouse Management Systems, knowledge related to motion trajectory prediction methods utilizing machine learning techniques seems to be scattered and fragmented. Objective: This study seeks to fill this research gap by using a systematic literature review approach. Methods: Based on the data collected from Google Scholar, a systematic literature review was performed, covering the period from 2016 to 2023. The review was driven by a protocol that comprehends inclusion and exclusion criteria to identify relevant papers. Results: Considering the Warehouse Management Systems, five categories of motion trajectory prediction methods have been identified: Deep Learning methods, probabilistic methods, methods for solving the Travelling-Salesman problem (TSP), algorithmic methods, and others. Specifically, the performed analysis also provides the research community with an overview of the state-of-the-art methods, which can further stimulate researchers and practitioners to enhance existing and develop new ones in this field.
Możliwości integracji projektów sztuki nowych mediów w procesy odnowy przestrzeni miejskiej
- Katarzyna Szakajło
2023 Pełny tekst
Zadaniem badawczym podjętym w rozprawie było wykazanie możliwość integracji projektów sztuki nowych mediów w procesy odnowy przestrzeni miejskiej. Wyodrębniono cztery etapy procesów odnowy miast: diagnozę, planowanie, realizację oraz ewaluację. Wskazano, że na etapie diagnozy sztuka nowych mediów może między innymi wspierać proces zbierania i wizualizacji danych, informować mieszkańców o stanie środowiska miejskiego. Na etapie planowania sztuka nowych mediów może pomóc włączać mieszkańców w procesy partycypacyjne, wzmacniać identyfikację z przestrzenią oraz służyć jako projekty pilotażowe. Na etapie realizacji obiekty sztuki nowych mediów okazują się być pomocniczym narzędziem w aktywizacji mieszkańców czy tworzeniu nowych połączeń pomiędzy rozdzielonymi fragmentami miasta. Na etapie ewaluacji wspierają monitoring wpływu podjętych działań na funkcjonowanie przestrzeni i jej odbiór. W pracy wykazano, że dla każdego etapu procesu odnowy dopasować można szczególnie efektywnie wspierający go rodzaj sztuki nowych mediów. Określono trzy parametry: tryb interakcji użytkownika z obiektem sztuki, poziom zaangażowania użytkownika oraz rodzaj interfejsu pośredniczącego w interakcji użytkownika z obiektem sztuki nowych mediów. Parametry te szczegółowo określają zależność pomiędzy oczekiwanym efektem oddziaływania sztuki nowych mediów a rodzajem obiektu, który służy osiągnięciu tego efektu.
Multi-Channel Virtual Instrument for Measuring Temperature—A Case Study
- Romuald Maśnicki
- Dariusz Świsulski
2023 Pełny tekst Electronics
The article presents the hardware and software configuration of the developed multi-channel temperature measurement system as well as calibration procedures and measurement results verifying the properties of measurement channels. The system has been developed and dedicated primarily for measuring the temperature distribution in a laboratory model simulating underground power lines. With the adopted configuration of the analog part of each measurement channel, the main functions in the system developed as a virtual instrument are performed in its software. The instrument input circuits contain NTC (negative temperature coefficient) thermistors used as temperature sensors. The resistance of each of the thermistors connected in the voltage divider circuits is converted into a voltage. The obtained voltages in the measurement channels, after analog-to-digital conversion (ADC), are processed in subsequent operations in the instrument’s software. In addition to the basic function of the device, which is the multi-channel temperature measurement, the operations of identifying the characteristics of the thermistors used and calibrating each of the individual measurement channels are performed. The article contains sample results of the calibration of measurement channels and temperature verification measurements used to evaluate the properties of the developed system. The obtained inaccuracy of the temperature measurement in each of the channels is less than 0.4 °C.
Multifunctional Bandpass Filter/Displacement Sensor Component
- Zahra Shaterian
- Michał Mrozowski
2023 Pełny tekst IEEE Access
This paper presents the design and realization of a multifunctional bandpassfilter/displacement-sensor using an edge-coupled microstrip bandpass filter loaded by a pair of split ring resonators (SRRs). It is shown that while the structure acts as a bandpass filter at its operating frequency, the phase of the reflection coefficient from a movable loading resonator at the resonance frequency of the resonator can be used for displacement sensing. With this aim, and to avoid any interference with the filter functionality, the resonance frequency of the SRRs is chosen within the stopband of the bandpass filter, where all the input signal is reflected back to the input port. Therefore, moving the loading resonators does not have any adverse effect on the filtering performance. To validate the concept, a fifth-order Chebyshev bandpass filter with a feed line loaded with a pair of SRRs is designed and the numerical evaluation of the proposed multifunctional bandpass-filter/displacement-sensor is provided. The proposed multifunctional component is also validated through fabrication and measurement. It is shown that the proposed component has a sensitivity of 8◦ /mm at the designed frequency of SRRs. However, the sensitivity can be increased by scaling the SRRs to resonate at a higher frequency within the upper stopband of the filter.
Multifunctional catalyst-assisted sustainable reformation of lignocellulosic biomass into environmentally friendly biofuel and value-added chemicals
- Muhammad Naeem
- Muhammad Imran
- Shoomaila Latif
- Adnan Ashraf
- Nazim Hussain
- Grzegorz Boczkaj
- Wojciech Smułek
- Teofil Jesionowski
- Muhammad Bilal
2023 CHEMOSPHERE
Rapid urbanization is increasing the world's energy demand, making it necessary to develop alternative energy sources. These growing energy needs can be met by the efficient energy conversion of biomass, which can be done by various means. The use of effective catalysts to transform different types of biomasses will be a paradigm change on the road to the worldwide goal of economic sustainability and environmental protection. The development of alternative energy from biomass is not easy, due to the uneven and complex components present in lignocellulose; accordingly, the majority of biomass is currently processed as waste. The problems may be overcome by the design of multifunctional catalysts, offering adequate control over product selectivity and substrate activation. Hence, this review describes recent developments involving various catalysts such as metallic oxides, supported metal or composite metal oxides, char-based and carbon-based substances, metal carbides and zeolites, with reference to the catalytic conversion of biomass including cellulose, hemicellulose, biomass tar, lignin and their derivative compounds into useful products, including bio-oil, gases, hydrocarbons, and fuels. The main aim is to provide an overview of the latest work on the use of catalysts for successful conversion of biomass. The review ends with conclusions and suggestions for future research, which will assist researchers in utilizing these catalysts for the safe conversion of biomass into valuable chemicals and other products.
Multi-functional monodispersed SiO2-TiO2 core-shell nanostructure and TEOS in the consolidation of archaeological lime mortars surfaces
- Abdelrhman Fahmy
- Anna Gołąbiewska
- Wiktoria Wojnicz
- Alicja Stanisławska
- Jakub Kowalski
- Justyna Łuczak
- Adriana Zaleska-Medynska
- Salvador Bella Domínguez-
- Javier Martínez-lópez
- Eduardo Molina-piernas
2023 Journal of Building Engineering
Archaeological traditional lime mortars are susceptible to many environmental conditions such as the impact of water (rain, humidity, groundwater, etc.), variation of temperatures' degrees, wind and/or pollution. Accordingly, this research aims to provide newly assessed multifunctional Nano-coating for the purpose of archaeological lime mortar protection. For this, the study combined physicochemical and mechanical characterizations in performance assessment of 3%, 5%, and 7% of the synthesized SiO2–TiO2 core-shell nanostructure and TEOS as consolidants on the surfaces of the experimental lime mortars. A series of techniques and tests were fulfilled for the evaluation. For analysis, X-ray diffraction and UV–Vis along with scanning electron microscopy were used to identify microstructure. Furthermore, wettability, colorimetric, self-cleaning, petrophysical, Nano-indentation, and uniaxial compressive strength tests were performed to select the most durable consolidant between 3%, 5%, and 7% SiO2–TiO2/TEOS. Durability assessments were carried out through salt weathering, thermal and UV aging tests. The results showed that 3% and 5% of SiO2–TiO2/TEOS enhanced the physical and mechanical properties of the lime mortars. On the other hand, 7% SiO2–TiO2/TEOS proved their insufficient efficacy in improving the surfaces of lime mortars for the high amount of TiO2 and its behavior for aggregation.
Multimedia industrial and medical applications supported by machine learning
- Andrzej Czyżewski
2023
This article outlines a keynote paper presented at the Intelligent DecisionTechnologies conference providing a part of the KES Multi-theme Conference “Smart Digital Futures” organized in Rome on June 14–16, 2023. It briefly discusses projects related to traffic control using developed intelligent traffic signs and diagnosing the health of wind turbine mechanisms and multimodal biometric authentication for banking branches to provide selected examples of industrial applications of intelligent decision technologies. In addition, the developed medical applications for communicating with the surroundings by unconscious people, advanced analyzing disordered speech, and an advanced noncontact respiratory-circulatory radar are presented, using intelligent data analysis and machine learning.
Multi-objective optimization of the ORC axial turbine for a waste heat recovery system working in two modes: cogeneration and condensation
- Łukasz Witanowski
- Piotr Klonowicz
- Piotr Lampart
- Paweł Ziółkowski
2023 ENERGY
Due to the demand of the district heating network and electric power grid ORC turbines can operate in the condensation and cogeneration modes. This approach requires the design of an expander which is characterized by high efficiency in each mode of operation. The paper is devoted to a multi-objective efficiency optimization of a one stage axial ORC turbine working on MM (Hexamethyldisiloxane). An Implicit Filtering algorithm (IF) is used to find a flowpath with maximum efficiency. During the optimization the rotor profiles (at the hub and shroud) and the shape of endwall contours of the rotor domain are changed. Five optimization tasks are carried out with different weights of the efficiency of both modes of operation. Pareto fronts are obtained and a decision- making method is used to select an optimum solution. The optimization of the rotor row allows for significant efficiency improvements in two regimes of operation, with respect to a baseline geometric configuration designed with the help of classical methods