Filters
total: 7642
-
Catalog
- Publications 6053 available results
- Journals 211 available results
- Conferences 2 available results
- Publishing Houses 2 available results
- People 190 available results
- Inventions 12 available results
- Projects 61 available results
- Laboratories 3 available results
- Research Teams 14 available results
- Research Equipment 8 available results
- e-Learning Courses 374 available results
- Events 28 available results
- Open Research Data 684 available results
displaying 1000 best results Help
Search results for: ENERGY%20EFFICIENCY
-
POWER EFFICIENCY OF POWER PLANTS ON TRAILING SUCTION HOPPER DREDGERS
PublicationThis paper presents the notion of operational power efficiency and compares it with the classical definition of power efficiency. There are presented also calculation results of power efficiency for a selected suction hopper dredger and also influence of power system type of suction hopper dredger on magnitude of power efficiency of its power plant has been highlighted.
-
A role of the heat and work uncompensatedtransformations in the balance of entropy and theturbomachinery efficiency
PublicationIn the paper we have presented a procedure of estimating a role of the uncompensated transformation of heat and work in ow of viscous and heat conducting uid. The procedure was introduced by Professor Romuald Puzyrewski and is essential in local, in time and space, balance of entropy. Furthermore this unique approach leads to redenition the eciency of uid-ow machinery in three-dimensional modeling using CFD (Computational Fluid...
-
Efficiency of acoustic heating produced in the thermoviscous flow of a fluid with relaxation
PublicationInstantaneous acoustic heating of a fluid with thermodynamic relaxation is the subject of investigation. Among others, viscoelastic biological media described by the Maxwell model of the viscous stress tensor, belong to this type of fluid. The governing equation of acoustic heating is derived by means of the special linear combination of conservation equations in differential form, allowing the reduction of all acoustic terms in...
-
Improving medical experts’ efficiency of misinformation detection: an exploratory study
PublicationFighting medical disinformation in the era of the pandemic is an increasingly important problem. Today, automatic systems for assessing the credibility of medical information do not offer sufficient precision, so human supervision and the involvement of medical expert annotators are required. Our work aims to optimize the utilization of medical experts’ time. We also equip them with tools for semi-automatic initial verification...
-
Methodology of experimental research on efficiency of hydro-mechanical automatic gearbox
PublicationThe article shortly describes the design and principle of operation of the hydromechanical gearbox and presents the methodology and design of test stands used for testing hydromechanical proto-type gearbox developed at Technical University of Gdansk. The article presents an approach according to which, in order to obtain reliable measurement data, it is necessary to separate the tests of the hydraulic and mechanical parts of the...
-
Evaluation of Street Lighting Efficiency Using a Mobile Measurement System
PublicationThe issue concerns the initial stage of work on a method for performing a rapid assessment of the energy efficiency and illuminance of a street lighting installation. The proposed method is based on simultaneous measurement of illuminance from three lux meters placed on the roof of the vehicle. The data are acquired in road traffic, while the vehicle is driving. The proposed solution will allow in the future to quickly and reproducibly...
-
Possibilities of Increasing the Overall Efficiency of Gas-steam CHP Microplant
PublicationThe paper presents ways to increase the efficiency of a gas-steam micro power plant by modifying the cycle combination. The modification consists in partial release of the fluid downstream of the gas turbine and using it for ORC fluid overheating and evaporation. Advantages of this solution over the simplest gas and steam cycles’ combination are demonstrated.
-
Focus on Misinformation: Improving Medical Experts’ Efficiency of Misinformation Detection
PublicationFighting medical disinformation in the era of the global pandemic is an increasingly important problem. As of today, automatic systems for assessing the credibility of medical information do not offer sufficient precision to be used without human supervision, and the involvement of medical expert annotators is required. Thus, our work aims to optimize the utilization of medical experts’ time. We use the dataset of sentences taken...
-
WAYS TO IMPROVE THE EFFICIENCY OF WASTEWATER TREATMENT OF A CARDBOARD AND PAPER MILL
PublicationThe results of research on physical and chemical methods for the preliminary treatment of wastewater of a cardboard and paper factory in Khmelnytskyi region of Ukraine are presented. At the cardboard and paper factory, wastewater is treated at a sewage treatment plant, which includes sand traps, primary radial sedimentation tanks, aeration tanks with activated sludge regenerators, secondary radial sedimentation tanks, and bioponds....
-
Efficiency of Electret Polycarbonate Nonwovens in Respiratory Protection Against Nanoparticles
Publication -
Energy shift of the Lβ2 line as an ionization diagnostic for the dense plasma in the PFRP
Publication -
Superconducting Energy Gap in Hole-Doped Graphene Beyond the Migdal's Theory
Publication -
Optimization of Parameters in Macromolecular Potential Energy Functions by Conformational Space Annealing
Publication -
Evolution of physics-based methodology for exploring the conformational energy landscape of proteins
Publication -
Fragmentation of isoxazole molecules by electron impact in the energy range 10–85eV
Publication -
Perspective of High Energy Heating Implementation for Steel Surface Saturation with Carbon
Publication -
Market value of PV battery systems for autonomous rural energy supply
Publication -
Determination of the rigidity and deformation energy of the technological machine load-carrying systems
Publication -
Energy Policy until 2050—Comparative Analysis between Poland and Germany
Publication -
The optical properties and band gap energy of nanocrystalline La0.4Sr0.6TiO3 thin films
PublicationW pracy zbadano wpływ mikrostruktury na właściwości optyczne La0.4Sr0.6TiO3 przygotowanego w postaci cienkiego filmu. Gęsty film o grubości 200nm i wielkości krystalitów 14-30nm został przygotowany na szafirze.
-
Energy conversion in small water plants with variable speed PM generator
Publication -
A possibility of vibration surveillance of linear unsteady systems at energy performance index
PublicationW pracy przedstawiono metodę nadzorowania drgań za pomocą sterowania optymalnego przy energetycznym wskaźniku jakości. Rozważano sterowanie w liniowych układach niestacjonarnych pełnych oraz zredukowanych. Rozważania zilustrowano przykładem nadzorowania drgań pomostów wagi kolejowej podczas ważenia dynamicznego wagonów. Wykazano użyteczność oraz przydatność praktyczną proponowanej metody nadzorowania drgań w układzie pierwotnym...
-
Modal energy identification of large stucture idealised by the finite element method
PublicationPrzedstawiono metodę określania energii drgań układów dyskretnych otrzyma-nych w wyniku modelowania metodą elementów skończonych wybranych fragmentów konstrukcji samochodów. W odróżnieniu od poprzednio stosowanych podejść, ro-zważa się całkowite energie mechaniczne odpowiadające poszczególnym posta-ciom drgań własnych. Całkowitą energię mechaniczną oblicza się na podstawie parametrów modelu modalnego. Energię mechaniczną można...
-
Modal control at energy performance index in reduced non-conservative system
PublicationW pracy rozważa się drgania niestacjonarnych układów mechanicznych modelowa-nych dyskretnie. Jednym ze sposobow nadzorowania tych drgań jest sterowanie optymalne przy energetycznym wskażniku jakości. Tymczasowe założenie o stac-jonarności układu daje możliwość wyznaczenia w trybie on-line optymalnego sygnału sterującego poszczególnymi postaciami drgań swobodnych układu a nas-tepnie - sterowanie układu niestacjonarnego wyznaczonym...
-
Efficient sampling of high-energy states by machine learning force fields
Publication -
Impact of Infant and Maternal Factors on Energy and Macronutrient Composition of Human Milk
Publication -
Elastic electron scattering by argon in the vicinity of the high-energy critical minimum.
PublicationZostały obliczone różniczkowe przekroje czynne na sprężyste rozpraszanie elektronów na argonie. Przedział energetyczny rozpraszanych elektronów został tak dobrany, aby zbadać położenie tzw. minimum krytycznego.
-
Energy consumption estimation of low-power devices using an integrating coulombmeter
PublicationThe main problem in designing devices powered with Energy Harvesting is an estimation of energy demand of low-power devices as well as quantity of energy provided by the selected energy transducer in the assumed work conditions. Due to the work characteristic of each block of the device and properties of the measured signal, measurement is not trivial. The paper presents the proposal of the micro-charge measurement device based...
-
Low-power device simulator for micro-energy measurement methods testing
PublicationThe paper presents low-power device simulator designed for testing of micro-energy measurement methods. Such kind methods can be used for evaluation of power systems based on Energy Harvesting. The device allows to set the current consumption characteristic over the time, thus making possible playing the role of different types of low-power devices e.g. simulating sensor network node.
-
Power and energy measurement problems in transmission line between Poland-Lithuania
PublicationThe paper discusses problem of power and energy metering in double circuit overhead transmission line. Considerations are based on example of transmission line connecting Polish substation Bis Elk and Lithuanian substation Alytus.
-
Review and Indication of Key Activities for Energy Management Improvement in DC Microgrids
PublicationDC MicroGrids (MG) must have Energy Management Systems (EMS) to guarantee efficient, dependable, and environmentally friendly electricity. The application of Model Predictive Control (MPC), proved to be helpful due to its adaptability and capacity to use non-linear models. This paper, based on an extensive literature review, identifies and discusses the three key activities to improve the characteristics of DC microgrids, i.e.:...
-
AC-DC-DC Converter for Small Power Energy Storage Systems
PublicationThe energy transformation driven by the development of renewable energy sources has become a reality for all power grid users. Prosumer energy, primarily utilizing photovoltaic installations, is one of the fastest-growing market segments. The advancement of technology, a decrease in electrochemical energy storage prices, and changes in the legal framework governing energy billing for grid-fed power have led to a growing interest...
-
ANALYSIS AND OPTIMIZATION OF ELECTRIC VEHICLE CHARGING PROCESSES IN TRANSACTIVE ENERGY SYSTEMS
PublicationThe implementation of smart charging of electric vehicles allows operators of local power networks and electricity suppliers to implement new business models for the interaction of electric vehicles with the network. In addition to the optimal selection of Microgrid capacities when charging electric vehicles, it is also important to use different charging methods. To satisfy the interests of all participants of local systems from...
-
Sawing frozen wood with narrow kerf saws: Energy and quality effects.
PublicationOpór skrawania zależy podczas przecinania nie tylko od wilgotności drewna lecz również od jego temperatury. W pracy przedstawiono wyniki badań eksperymentalnych przecinania drewna sosnowego zmrożonego na pilarce ramowej wielopiłowej. Dla porównania wykonano również testy dla drewna o temperaturze pokojowej. Czynnikami badanymi były: moc skrawania, dokładność przecinania w postaci grubości elementów, a także chropowatość powierzchni....
-
Threshold photoelectron spectra of tetrahydrofuran over the energy range 9-29eV
PublicationWykonano pomiary fotoelektronowe widm progowych tetrahydrofuranu C4H8O w zakresie energii fotonów 9-29 eV przy użyciu promieniowania synchrotronowego. Zaobserwowano nowe pasma jonizacyjne w zakresie energii 16-26eV
-
Examples of a use of the optimal control at energy performance index in mechatronic approach
PublicationW pracy zaprezentowano przykłady zastosowania sterowania optymalnego przy energetycznym wskaźniku jakości w rozwiązaniach mechatronicznych. Rozważano układy mechaniczne modelowane dyskretnie. Metody sterowania optymalnego znalazły zastosowanie w robotyce (kołowe roboty mobilne jako układy silnie nieliniowe) oraz obróbce szybkościowej przedmiotów podatnych frezem kulistym.
-
Planning for sustainable development of energy infrastructure: fast – fast simulation tool
Publication -
Energy-Saving Inertial Drive for Dual-Frequency Excitation of Vibrating Machines
Publication -
The Role of Crypto Trading in the Economy, Renewable Energy Consumption and Ecological Degradation
Publication -
Effects of Base π-Stacking on Damage to DNA by Low-Energy Electrons
Publication -
Computer -Aided Local Energy Planning Using ALEP-PL Software
PublicationThe issue of energy system planning, including the planning of local energy systems, is critical, since it affects the security of energy supplies in communities, regions, and consequently the security of energy supply within the country. Energy planning is a complex process that requires integration of different goals i.e. improvement of energy efficiency, increase in the share of renewables in the energy balance and CO2} emission...
-
RAPESEED PELLET - A BYPRODUCT OF BIODIESEL PRODUCTION - AS AN EXCELLENT RENEWABLE ENERGY SOURCE
PublicationVegetable oils are renewable feedstock currently being used for production of biofuels from sustainable biomass resources. The existing technology for producing diesel fuel from plant oils, such as rapeseed, soybean, canola and palm oil are largely centered on transesterification of oils with methanol to produce fatty acid methyl esters (FAME) or biodiesel. Rapeseed pellet - crushed seed residue from oil extraction is a byproduct...
-
Selected Problems of Cogeneration Energy Systems Designing, Fueled with Landfill Biogas
PublicationThe article discusses the impact of the quality of biogas fuel for operation of generating sets with internal combustion engines. There are presented selected investigation results of landfill biogas fueled gensets operation. The article includes also discussion of the possibility of increasing the efficiency of biogas fuelled cogeneration systems. It also presents guidelines for the optimal design of landfill biogas fueled engines,...
-
Red Algae – An Alternative Source of Carbon Material for Energy Storage Application
PublicationNew electrode material obtained by pyrolysis of aquatic biomass macro (red algae) soaked with glucose solution has been characterized by SEM, EDX and Raman spectroscopy. Graphitized carbon was identified by Raman spectroscopy. Galvanostatic cyclic polarization of the materials in contact with 1M LiPF6 electrolyte in EC:DMC (1:1 v/v) and Li as a counter electrode was performed. Specific capacity of the novel material was enhanced...
-
Reactions in nanofilms of trifluoroacetic acid (CF3COOH) driven by low energy electrons
PublicationBadano modyfikacje chemiczne indukowane przez niskoenergetyczne elektrony (0-20eV) w cienkich warstwach skondensowanych molekuł CF3COOH. Do badań zastosowano dwie metody: desorpcję jonów w wyniku bombardowania elektronami (ESD - Electron Stimulated Desorption) oraz termiczną desorpcję jonów (TDS - Thermal Desorption Spectroscopy).
-
Innovative Gathering and Energy Management System Integrated within PV Module
PublicationThe dynamic development of battery technology and design based on the flow of lithium ions, mainly driven by the needs of the automotive industry leads to the Conclusion That they are becoming a more viable alternative to traditional lead-acid batteries. Their use is driven by the ability it quickly charge and discharge times higher durability, maintenance-free operation and much smaller dimensions as well as weight. The emergence...
-
Electron ionization and low energy electron attachment to molecules of biological interest
PublicationEthylenediaminetetraacetic acid (EDTA) and 2-amino-2-(hydroxymethyl)-1,3-propanediol (TRIS) were investigated by electron impact ionization and low energy electron attachment. Both compounds are components of biological buffers and often are used as DNA stabilizers in irradiation studies. hus it is of a great importance to understand their potential interactions with radiation. Our results revealed that at least one of them, EDTA, may...
-
Optimal control of 2-wheeled mobile robot at energy performance index
PublicationThe paper presents the application of the optimal control method at the energy perfor- mance index towards motion control of the 2-wheeled mobile robot. With the use of the proposed method of control the 2-wheeled mobile robot can realise effectively the desired trajectory. The problem of motion control of mobile robots is usually neglected and thus performance of the realisation of the high level control tasks is limited.
-
Magnetizabilities of relativistic hydrogenlike atoms in some arbitrary discrete energy eigenstates
PublicationWe present the results of numerical calculations of magnetizability of the relativistic hydrogenlike atoms. Exploiting the analytical formula for $\chi$ we have found the values of the magnetizability for the ground state and for the first and the second set of excited states of the atom. The results for ions with the atomic number $0
-
Research and Development at the Department of Energy and Industrial Apparatus of Gdansk University of Technology
PublicationIn the paper presented are the research and development activities at the Department of Energy and Industrial Apparatus of Gdansk University of Technology