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Wyniki wyszukiwania dla: ENERGY CONVERSION/SYSTEMS

Wyniki wyszukiwania dla: ENERGY CONVERSION/SYSTEMS

  • Impedance monitoring of corrosion degradation of plasma electrolytic oxidation coatings (PEO) on magnesium alloy

    Publikacja

    Impedance technique based on continuous multisinusoidal current perturbation was used to explain degradation process of plasma electrolytic oxidation coatings (PEO) on magnesium alloy. An obtained impedance spectrum was fitted by electrical equivalent circuit to describe properties of conversion layer on magnesium alloy. Additionally, galvanostatic mode maintained during experiment, with DC current equal to zero, allowed to achieve...

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  • Characterization of d-xylose reductase, XyrB, from Aspergillus niger

    Publikacja
    • A. Terebieniec
    • T. Chroumpi
    • A. Dilokpimol
    • M. V. Aguilar-Pontes
    • M. R. Mäkelä
    • R. de Vries

    - Biotechnology Reports - Rok 2021

    D-xylose reductase is a member of the aldo-keto reductase family, and is involved in D-xylose and L-arabinose conversion through the Pentose Catabolic Pathway (PCP) in fungi. In this study, we biochemically characterized a newly identified second D-xylose reductase (XyrB) from Aspergillus niger. This NADPH-dependent reductase is able to efficiently convert D-xylose and L-arabinose, and it has the highest affinity for these sugars...

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  • Solar Photovoltaic Energy Optimization and Challenges

    Publikacja

    - Frontiers in Energy Research - Rok 2022

    The study paper focuses on solar energy optimization approaches, as well as the obstacles and concerns that come with them. This study discusses the most current advancements in solar power generation devices in order to provide a reference for decision-makers in the field of solar plant construction throughout the world. These technologies are divided into three groups: photovoltaic, thermal, and hybrid (thermal/photovoltaic)....

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  • [AEiE] Selected topics of electrical engineering - models of electrical machines

    Kursy Online
    • A. Wilk
    • R. Jankowski
    • Z. Krzemiński

    {mlang pl} Dyscyplina: automatyka, elektronika i elektrotechnika Zajęcia fakultatywne dla doktorantów II roku Prowadzący:  dr hab. inż. Andrzej Wilk, prof. PG, prof. dr hab. inż. Zbigniew Krzemiński Liczba godzin: 15 Forma zajęć: wykład {mlang} {mlang en} Discipline: control, electronic and electrical engineering Facultative course for 2nd-year PhD students Academic teachers: dr hab. inż. Andrzej Wilk, prof. PG, prof....

  • Diamondized carbon nanoarchitectures as electrocatalytic material for sulfate-based oxidizing species electrogeneration

    Publikacja

    - ELECTROCHIMICA ACTA - Rok 2022

    The introduction of nanotechnology seems to be an imperative factor to intensify the synergic effects of electrocatalytic materials to produce strong oxidant species or to increase the active sites on their surfaces as well as to enhance the conversion yield in a fuel cell, high-added value products, electrolytic treatment for environmental protection or the detection limit in electroanalysis. Recently, a new type of 3D-diamond...

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  • Electrochemical Production of Sodium Hypochlorite from Salty Wastewater Using a Flow-by Porous Graphite Electrode

    Publikacja

    - ENERGIES - Rok 2023

    The production of sodium hypochlorite (NaOCl) from salty wastewater using an electrochemical cell has several advantages over other methods that often require hazardous chemicals and generate toxic waste, being more sustainable and environmentally friendly. However, the process of producing sodium hypochlorite using an electrochemical cell requires careful control of the operating conditions, such as the current density, flow rate,...

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  • OSC - domain oriented ontology creation system

    Publikacja

    Ontologies are, as part of semantic web, a basic component to enrich content available in the Internet with a meaning understandable for computers. In this publication an architecture and functionality of a domain oriented web portal for collaborative creation and storage of ontologies is presented. The system is being created by Gdańsk University of Technology Electronics, Telecommunications and Informatics faculty's Department...

  • Wastewater Engineering 2021/22 (Environmental Engineering, II stopnia, stacjonarne, II semestr))

    Kursy Online
    • K. Czerwionka
    • J. Mąkinia

    Wastewater sources and flows Wastewater characterization based on physical and biodegradation criteria Preliminary treatment unit operations (screens, grit chambers, primary clarifiers) Biological processes (suspended growth vs. attached growth, hybrid systems, granular sludge) for wastewater treatment Principles of biological nutrient removal (nitrification, denitrification, enhanced biological P removal, anammox) Implementation...

  • Wastewater Engineering 2022/23 (Environmental Engineering, II stopnia, stacjonarne, II semestr))

    Kursy Online
    • K. Czerwionka
    • J. Mąkinia

    Wastewater sources and flows Wastewater characterization based on physical and biodegradation criteria Preliminary treatment unit operations (screens, grit chambers, primary clarifiers) Biological processes (suspended growth vs. attached growth, hybrid systems, granular sludge) for wastewater treatment Principles of biological nutrient removal (nitrification, denitrification, enhanced biological P removal, anammox) Implementation...

  • Wastewater Engineering 2023/24 (Environmental Engineering, II stopnia, stacjonarne, II semestr)

    Kursy Online
    • J. Mąkinia

    Wastewater sources and flows Wastewater characterization based on physical and biodegradation criteria Preliminary treatment unit operations (screens, grit chambers, primary clarifiers) Biological processes (suspended growth vs. attached growth, hybrid systems, granular sludge) for wastewater treatment Principles of biological nutrient removal (nitrification, denitrification, enhanced biological P removal, anammox) Implementation...

  • Metody strojenia regulatorów typu PID z wykorzystaniem technologii syntezy regulatorów od stanu

    Układy sterujące typu PID są jednymi z najbardziej popularnych regulatorów wykorzystywanych w układach regulacji. W związku z tym znanych jest szereg metod doboru wartości ich parametrów (nastaw). Obok różnych metod inżynierskich czy analitycznych strojenia tego typu regulatorów, dostępne są również podejścia bazujące na optymalizacji. Wskaźnikiem jakości znajdującym w nich zastosowanie jest np. całka z kwadratu uchybu. W artykule...

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  • Wpływ ekologicznych czynników roboczych na efektywność układu sprężarkowej pompy ciepła (The impact of environmentally friendly refrigerants on heat pump efficiency)

    Artykuł poświęcony jest zagadnieniu symulacji pracy układu sprężarkowej pompy ciepła. Prawidłowe zaprojektowanie instalacji oraz jej właściwe użytkowanie pozwala na zmniejszenie kosztów eksploatacji. Dokładna analiza techniczno-ekonomiczna umożliwia natomiast dobór elementów systemu o możliwie największej sprawności, a zatem niskim zapotrzebowaniu na energię. Zastosowanie układów opartych o perspektywiczne, proekologiczne czynniki...

  • Collaborative development model and strategies of multi-energy industry clusters: Multi-indicators analysis affecting the development of coastal energy clusters

    Publikacja

    - ENERGY - Rok 2024

    The paper explores Coastal Energy-Based Industrial Clusters (EBICs) and their role in advancing energy efficiency and sustainability through collaborative innovation. Economic growth theory and energy sustainability have been introduced into industrial clusters to illustrate indicators that have a greater impact on the development of EBICs. This paper proposes an EBICs development model based on the Cobb-Douglas function, in which...

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  • ENERGY AND BUILDINGS

    Czasopisma

    ISSN: 0378-7788 , eISSN: 1872-6178

  • Adaptacyjny system oświetlania dróg oraz inteligentnych miast

    Publikacja

    - Rok 2024

    Przedmiotem rozprawy jest zbadanie praktycznej możliwości wykrywania w czasie rzeczywistym anomalii w systemie oświetlenia drogowego w oparciu o analizę danych ze inteligentnych liczników energii. Zastosowanie inteligentnych liczników energii elektrycznej (Smart Meter) w systemach oświetlenia drogowego stwarza nowe możliwości w zakresie automatycznej diagnostyki takich niepożądanych zjawisk jak awarie lamp, odstępstwa od harmonogramu...

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  • Transient States during Short-circuit in a Line Powered by UPS and its Impact on Earth Fault Loop Impedance Measurement and Power Quality

    Publikacja

    The short-circuit in a line powered by Uninterruptible Power Supply (UPS) during different UPS operation modes is presented in the article. The transient state condition related to the short-circuit in a line fed from double conversion On-line UPS is discussed in detail. The results of the measurements of earth fault loop impedance (FLI) in circuits powered by UPS with the instruments of various manufacturers are presented. The...

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  • Liquefaction of macroalgae Enteromorpha biomass for the preparation of biopolyols by using crude glycerol

    This article describes the liquefaction process of macroalgae Enteromorpha with the use of crude glycerol as a solvent and a reagent, aimed at obtaining of new bio-polyols, which are characterized with respect to their chemical structure, physical and thermal properties. Six different biopolyols were prepared. In order to optimize the liquefaction of algal biomass for the best bio-polyol properties, two catalysts (sulfuric or orthophosphoric...

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  • APPLICATION OF THE HIGH FREQUENCY LINEARIZATION OF THE EAR IN PATIENTS WITH TINNITUS . Metoda linearyzacji narządu słuchu u osób cierpiących z szumami usznymi

    Publikacja

    - Rok 2013

    This paper summarises the problem of tinnitus, hypotheses on its causes and the treatment methods. Moreover, a hypothesis on tinnitus origins is explained, based on the mechanisms of the analog-to-digital conversion and quantization. In addition, this paper describes methods of determining the acoustic intensity and spectra of low- level ultrasonic signals, as well as impedance characteristics of an ultrasound transducer. Furthermore,...

  • Piotr Jasiński prof. dr hab. inż.

    Piotr Jasinski obtained MSc in electronics in 1992 from the Gdansk University of Technology (GUT), Poland. Working at GUT, he received PhD in 2000 and DSc in 2009. Between 2001 and 2004 Post Doctoral Fellow at Missouri University of Science and Technology, while between 2008 and 2010 an Assistant Research Professor. Currently is an Associate Professor at Gdansk University of Technology working in the field of electronics, biomedical...

  • Clean energy in the European Union: Transition or evolution?

    Publikacja

    In this paper, we analyse two phenomena. First, the relationship between greenhouse gases emission and effectiveness of the European Union energy policies and second the transition from the fossil fuels to renewable energy sources. We run two-step data analysis concerning 25 European Union member states in the period from 1990 to 2018. We use information on greenhouse gases emission, introduction of new energy policies, source...

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  • Przegląd systemów ładowania elektrycznych osobowych pojazdów i koncepcja dwukierunkowej ładowarki pokładowej

    Aktualnie trwa intensywny rozwój pojazdów elektrycznych (EV) i hybrydowych typu plug-in (PHEV) z pokładowymi bateriami akumulatorów. Badania w tej dziedzinie skupiają się na maksymalizowaniu sprawności oraz minimalizowaniu masy i objętości systemów ładowania baterii. W artykule przedstawiono podział systemów ładowania osobowych pojazdów typu EV/PHEV. Opisano systemy ładowania przewodowego z podziałem na ładowarki pokładowe i zewnętrzne, systemy...

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  • Charakterystyka eksploatacyjna pomp ciepła zainstalowanych w oczyszczalni ścieków

    Publikacja

    - Instal - Rok 2015

    W artykule przedstawiono charakterystykę eksploatacyjną sprężarkowych pomp ciepła zainstalowanych w oczyszczalni komunalnej i wykorzystujących ścieki oczyszczone jako dolne źródło ciepła. Zastosowanie ścieków oczyszczonych jest uzasadnione ich dostępnością oraz stosunkowo wysoką temperaturą (10-25°C). Prawidłowa eksploatacja układu wymaga zastosowania pośredniego obiegu parowacza oraz regularnych zabiegów czyszczenia wymiennika...

  • A unified approach to the analysis of electric energy and fuel consumption of cars in city traffic

    Publikacja

    - ENERGY - Rok 2019

    Forecasting fuel and electricity consumption is an important factor determining the direction of changes in road engineering solutions, traffic management, selection of routes for public transport and development more efficient car drive systems. With a reliable and easy-to-use computational tool, it is possible to reduce the consumption of primary energy sources and reduce the emission of toxic compounds in cities. An analysis...

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  • Energy policy and the role of bioenergy in Poland

    Publikacja

    - ENERGY POLICY - Rok 2006

    Przedstawiono sytuacje energetyczną kraju. Omówiono poszczególne sektory wytwarzania energii oraz zapotrzebowania na energię i paliwa. Omówiono przekształcenia sektorów energetycznych w Polsce na przestrzeni lat 1990-2002. Na tym tle przedstawiono techniczne, ekonomiczne, społeczne i prawne aspekty rozwoju energetyki źródeł odnawialnych a w szczególności opartych o bioenergię. Przedstawiono wnioski dla Polski płynące z dotychczasowych...

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  • Carbon Resources Conversion

    Czasopisma

    ISSN: 2588-9133

  • Potential of Explainable Artificial Intelligence in Advancing Renewable Energy: Challenges and Prospects

    Publikacja
    • V. N. N. Nhanh Van
    • W. Tarełko
    • S. Prabhakar
    • A. S. El-Shafay
    • W. Chen
    • P. Q. P. Nguyen
    • N. X. Phuong
    • T. A. Nguyen

    - ENERGY & FUELS - Rok 2024

    Modern machine learning (ML) techniques are making inroads in every aspect of renewable energy for optimizationand model prediction. The effective utilization of ML techniques for the development and scaling up of renewable energy systemsneeds a high degree of accountability. However, most of the ML approaches currently in use are termed black box since their work isdifficult to comprehend. Explainable artificial intelligence (XAI)...

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  • RENEWABLE ENERGY

    Czasopisma

    ISSN: 0960-1481

  • Piotr Szczuko dr hab. inż.

    Dr hab. inż. Piotr Szczuko w 2002 roku ukończył studia na Wydziale Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej zdobywając tytuł magistra inżyniera. Tematem pracy dyplomowej było badanie zjawisk jednoczesnej percepcji obrazu cyfrowego i dźwięku dookólnego. W roku 2008 obronił rozprawę doktorską zatytułowaną "Zastosowanie reguł rozmytych w komputerowej animacji postaci", za którą otrzymał nagrodę Prezesa Rady...

  • Time variable gain for long range sonar with chirp sounding signal

    The main purpose of applaying Time Variable Gain (TVG) in active sonars with digital signal processing is to reduce dynamic range of echo signal and adapt it to the dynamic range of the analogue to digital conversion. With high transmission losses level, the dynamic range of the input signal in long range sonars can be very high and even exceed 200dB. When chirp sounding signals with matched filtration are used, sonars can raech...

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  • Obtaining of coumarone-indene resins based on light fraction of coal tar 2. Coumarone-indene resins with epoxy groups

    Publikacja

    - Chemistry & Chemical Technology - Rok 2018

    Coumarone-indene resins (CIR) with carboxy groups were synthesized via cooligomerization of unsaturated compounds presented in light fraction of coal tar and its fraction boiling out within 423–463 K with the addition of such industrial monomers as styrene, maleic anhydride, glycidyl methacrylate and methacrylic acid. 2,2`-Azobis(2-methylpropionitrile) in the form of 0.2 M solution in toluene was used as an initiator. The effect...

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  • Self-Testing of Analog Parts Terminated by ADCs Based on Multiple Sampling of Time Responses

    A new approach for self-testing of analog parts terminated by analog-to-digital converters in mixed-signal electronic microsystems controlled by microcontrollers is presented. It is based upon a new fault diagnosis method using a transformation of the set of voltage samples of the time response of a tested analog part to a square impulse into localization curves placed in a multidimensional measurement space. The method can be used...

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  • Modelowanie dynamiki odbieraka prądu pojazdu kolejowego do celów diagnostycznych

    Publikacja

    Niewłaściwa współpraca odbieraka prądu i sieci trakcyjnej, w trudnych warunkach lokalnych, może prowadzić do uszkodzenia sieci trakcyjnej i pantografu. W ramach rozwoju metod monitoringu i diagnostyki dla tych podsystemów, tworzone są nowe i dokładniejsze narzędzia symulacyjne, których zakres obejmuje modelowanie zarówno napowietrznej sieci trakcyjnej i pantografu, a także ich dynamicznego oddziaływania. Głównym celem jest dokładniejsza...

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  • Kacper Szturgulewski mgr inż.

    Specjalista naukowo-techniczny w Politechnice Gdańskiej, wiodącej technicznej uczelni badawczej w Polsce.  W chwili obecnej zajmuje się wysokoefektywnymi systemami energetycznymi z wykorzystaniem odnawialnych źródeł energii oraz technologii magazynowania energii. Uczestniczę w międzynarodowym projekcie Horizon Europe - 2LIPP (2nd Life for Power Plants), będącym częścią inicjatywy BRIDGE. Dodatkowo, aktywnie angażuje się w inicjatywy...

  • Enriching the Context: Methods of Improving the Non-contextual Assessment of Sentence Credibility

    Publikacja

    - Rok 2019

    This paper presents several methods of automatic context enrichment of sentences that need to be evaluated, tagged or fact-checked by human judges. We have created a corpus of medical Web articles. Sentences from this corpus have been fact-checked by medical experts in two modes: contextually (reading the entire article and evaluating sentence by sentence) and without context (evaluating sentences from all articles in random order)....

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  • Computer-assisted pronunciation training—Speech synthesis is almost all you need

    Publikacja

    - SPEECH COMMUNICATION - Rok 2022

    The research community has long studied computer-assisted pronunciation training (CAPT) methods in non-native speech. Researchers focused on studying various model architectures, such as Bayesian networks and deep learning methods, as well as on the analysis of different representations of the speech signal. Despite significant progress in recent years, existing CAPT methods are not able to detect pronunciation errors with high...

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  • The energy concept of money

    Purpose: This paper aims to provide the literature review seeking an answer whether energy can be used as a universal equivalent instead of money. Methodology: The author conducted a review of available literature and data sources related to the money theory and energy concept of money. Findings: It was found that the definition of energy as a general equivalent has a contextual and dynamic nature, and this field’s consolidation...

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  • Arsalan Muhammad Soomar Doctoral Student

    Osoby

    Hi, I'm Arsalan Muhammad Soomar, an Electrical Engineer. I received my Master's and Bachelor's Degree in the field of Electrical Engineering from Mehran University of Engineering and Technology, Jamshoro, Sindh, Pakistan.  Currently enrolled as a Doctoral student at the Gdansk University of Technology, Gdansk, Poland. Also worked in Yellowlite. INC, Ohio  as a Solar Design Engineer.   HEADLINE Currently Enrolled as a Doctoral...

  • A Convenient Way to Methylated 2-Imidazolines. Syntheses of Fluorene and Triazine Cyclic Diamidines

    Publikacja

    One N-methyl- and 4-substituted 2-imidazolines are described. Fluorene bisimidazolines were obtained in good yield (64-92%), starting from 2,7-dicyanofluorene and ammonium sulfide. In a two-step procedure the crude bisthioamide was reacted with excess diaminoalkane-ethanol (1:1 mixt.) in an oil bath. This new procedure is superior over std. methods. For the sake of comparison, a new triazine bisimidazoline (I) was prepd. by...

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  • Influence of excitons interaction with charge carriers on photovoltaic parameters in organic solar cells

    We report on theoretical analysis of excitons annihilation on charge carriers in organic solar cells. Numerical calculations based on transient one-dimensional drift-diffusion model have been carried out. An impact of three quantities (an annihilation rate constant, an exciton mobility and a recombination reduction factor) on current density and concentrations of charge carriers and excitons is investigated. Finally, we discuss...

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  • Synthesis of novel dinuclear ruthenium polypyridine dye for dye-sensitized solar cells application

    Publikacja
    • M. Zalas
    • B. Gierczyk
    • M. Klein
    • K. Siuzdak
    • T. Pędziński
    • T. Łuczak

    - POLYHEDRON - Rok 2014

    A new dinuclear ruthenium(II) polypyridine complex has been successfully synthesized. The new compound has been characterized by spectroscopic and electrochemical methods. Its potential application as a sensitizing dye in dye-sensitized solar cells has been checked under AM 1.5 G irradiation conditions (100 mW cm−2) and its performance was compared to that of a commercially available mononuclear analogous dye. The overall light-to-electricity...

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  • The Development of a Conceptual Framework for Knowledge Sharing in Agile IT Projects

    Publikacja

    - CYBERNETICS AND SYSTEMS - Rok 2022

    Organizations must adapt their resources to meet the challenges associated with changes in the work environment in order to remain competitive in the information era. Several research findings identify knowledge sharing as a means for an organization to improve its competitiveness. Knowledge sharing can be defined in a variety of ways, but it essentially refers to the exchange of knowledge from an information giver to an information...

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  • Potential energy curves of LiCs dimer

    Dane Badawcze
    open access

    This data presents potential energy curves of LiCs dimer in Hund's case (a). Calculated using Born-Oppenheimer approximation with scalar relativistic effects are included via large effective core potentials. Custom basis sets, core polarization potentials and MRCI method are used to accurately describe electron correlation. Dataset consists of 22 potential...

  • Wybrane aspekty modelowania matematycznego kolejowego odbieraka prądu

    Nieprawidłowa współpraca odbieraka z siecią jezdną, w niekorzystnych warunkach lokalnych, prowadzi do uszkodzeń sieci lub odbieraka. Może być to spowodowane niewłaściwym wykonaniem lub utrzymaniem tych istotnych elementów układu zasilania. Tego typu sytuacje awaryjne powodują duże opóźnienia w ruchu pociągów i generują olbrzymie koszty. Wskazuje to na duże znaczenie odpowiednich rozwiązań konstrukcyjnych sieci i odbieraków oraz...

  • EMI attenuation in a DC-DC buck converter using GaN HEMT

    A dc-dc buck converter using gallium nitride (GaN) high electron mobility transistors (HEMT) is experimentally investigated at the discontinuous current mode (DCM) and at the triangular current mode (TCM) operation. The paper objective is to specify the power conversion efficiency and attenuation of common mode (CM) and differential mode (DM) noise voltage, measured at the line impedance stabilization network (LISN) for compared...

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  • Dual functionality of amphiphilic 1-alkyl-3-methylimidazolium hydrogen sulfate ionic liquids: surfactants with catalytic function

    Publikacja

    - RSC Advances - Rok 2016

    A series of amphiphilic 1-alkyl-3-methylimidazolium hydrogen sulfate ionic liquids were synthesized. Acidic hydrogen sulfate ionic liquids with the alkyl chains C6–C14 are characterized by good surface properties. Their surface properties (adsorption and micellization parameters, degree of ionization of micelles, Krafft temperatures and thermodynamic parameters) were determined. Synthesized ionic liquids were applied as a co-catalyst...

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  • Game theory-based virtual machine migration for energy sustainability in cloud data centers

    Publikacja
    • F. J. Maldonado-Carrascosa
    • S. García-Galán
    • M. Valverde-Ibáñez
    • T. Marciniak
    • M. Szczerska
    • N. Ruiz-Reyes

    - APPLIED ENERGY - Rok 2024

    As the demand for cloud computing services increases, optimizing resource allocation and energy consumption has become a key factor in achieving sustainability in cloud environments. This paper presents a novel approach to address these challenges through an optimized virtual machine (VM) migration strategy that employs a game-theoretic approach based on particle swarm optimization (PSO) (PSO-GTA). The proposed approach leverages...

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  • Decentralized Microgrid Energy Management System with Market-Based Energy Trade System

    Publikacja

    This paper presents a decentralized energy management system for a power microgrid, which integrates individual users, who own renewable energy sources and energy storages. The purpose of the system is to make optimal use of available resources to cover the electricity needs of the whole microgrid. Thanks to the energy exchange system, in addition to exchanges with the distribution network, the system also allows trades within...

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  • Ti3C2 MXenes-based catalysts for the process of α-pinene isomerization

    Publikacja

    - RSC Advances - Rok 2023

    In this study, the catalytic performance of Ti3C2 MXene materials in the reaction of α-pinene isomerization was demonstrated. The influence of etching agents (HF, HF/H2SO4, and HF/HCl; weight ratios of mixed acids: 1 : 3, 1 : 4, and 1 : 5) on removing Al atoms from MAX phase, creation of an accordion-like structure typical...

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  • Energy recovery effectiveness in trolleybus transport

    Publikacja

    - ELECTRIC POWER SYSTEMS RESEARCH - Rok 2014

    Nowadays the issue of electric energy saving in public transport is becoming a key area of interest whichis connected both with a growth in environmental awareness of the society and an increase in the pricesof fuel and electricity. One of the possibilities to reduce energy consumption in urban public transport isto increase the extent of regenerative braking energy utilization. This can be achieved by its accumulationin the supercapacitors...

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  • ENERGY & FUELS

    Czasopisma

    ISSN: 0887-0624 , eISSN: 1520-5029