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Search results for: ENERGIA SŁONECZNA
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Chemistry induced by low-energy electrons in condensed multilayers of pure small organic acids
PublicationPrzedstawiono reakcje indukowane przez niskoenergetyczne elektrony (0.7 - 20 eV) w kondensowanych warstwach kwasu mrówkowego (HCOOH), częściowo deuterowanego kwasu octowego (CH3COOD) oraz kwasu trifluorooctowego (CF3COOD).
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Energy resolution and non-proportionality of the light yield of pure CsI at liquid nitrogen temperatures
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Donor–acceptor nonradiative energy transfer mediated by surface plasmons on ultrathin metallic films
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Mechanisms shaping the synergism of zeaxanthin and PsbS in photoprotective energy dissipation in the photosynthetic apparatus of plants
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Spatial Heterogeneity Impacts of Bilateral Foreign Direct Investment on Green Energy Efficiency in China
PublicationAt present, green energy transformation and climate policy are increasingly connected. The need to improve national competitiveness and implement climate and energy strategies means that an energy-consuming country like China must rapidly enhance its green energy efficiency (GEE) and energy consumption structure. The following paper contributes to the existing literature by analyzing the effects of bilateral FDI on GEE from...
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Multiaxial fatigue life assessment in notched components based on the effective strain energy density
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Efficient parallel algorithms in global optimization of potential energy functions for peptides, proteins, and crystals
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Ultrathin NiO confined within hollow carbon sphere for efficient electrochemical energy storage
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Bond-graphs based modelling of hybrid energy systems with permanent magnet brushless machines
PublicationW referacie przedstawiono metodę grafów wiązań (GW) w zastosowaniu do modelowania hybrydowych systemów energetycznych z bezszczotkowymi maszynami elektrycznymi o magnesach trwałych. W części pierwszej referatu omówiono ogólne formalizm GW. Następnie przedstawiono kolejno: ogólną strukturę modelu hybrydowego systemu energetycznego w ujęciu GW; założenia modelowania maszyn elektrycznych w ujęciu GW, model silnika bezszczotkowego...
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Bond-graphs based modelling of hybrid energy systems with permanent magnet brushless machines
PublicationW referacie przedstawiono metodę grafów wiązań (GW) w zastosowaniu do modelowania hybrydowych systemów energetycznych z bezszczotkowymi maszynami elektrycznymi o magnesach trwałych. W części pierwszej referatu omówiono ogólne formalizm GW. Następnie przedstawiono kolejno: ogólną strukturę modelu hybrydowego systemu energetycznego w ujęciu GW; założenia modelowania maszyn elektrycznych w ujęciu GW, model silnika bezszczotkowego...
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Analysis of energy recovery from surplus water pressure of municipal heat distribution network
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Förster Resonance Energy Transfer-Activated Processes in Smart Nanotheranostics Fabricated in a Sustainable Manner
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Power Hardware In-the-Loop validation of DC-DC power converter for offshore wind energy
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Modelling changes in the energy efficiency of buildings using neural networks on the example of Zielona Góra
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Emisja rtęci z polskiej energetyki = Mercury emission from polish energy sector
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Review of Linear Electric Motor Hammers—An Energy-Saving and Eco-Friendly Solution in Industry
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The use of a static electrical energy meter as a transducer of active power to a pulse frequency signal
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Damage to Model DNA Fragments from Very Low-Energy (<1 eV) Electrons
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The saturation of the excess electron binding energy in AlnF3n+1- (n= 1–5) anions
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Utilization of rapeseed pellet from fatty acid methyl esters production as an energy source
PublicationRapeseed pellet – crushed seed residue from oil extraction is a by-product of fatty acid methyl esters production process. As other types of biomass, it can either be burned directly in furnaces or processed to increase its energetic value. Biomass is renewable, abundant and has domestic usage; the sources of biomass can help the world reduce its dependence on petroleum products, fossil coal and natural gas. Energetically effective...
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Low-energy positron scattering from DNA nucleobases: the effects from permanent dipoles
PublicationAb initio quantum calculations for low-energy positron scattering from gas-phase isolated molecular nucleobases which are part of the DNA structure are presented and discussed over the range of 1 eV to 25 eV. The calculations report the integral cross sections (ICSs) and the momentum-transfer cross sections (MTCSs) for Adenine, Guanine, Thymine and Cytosine. The calculations show very clearly the important role of the dominant...
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Energy savings by application of supercapacitor storage in trolleybus supplying station - analysis of experimental results
PublicationStorage devices can be divided into two groups: on-board energy storage devices, which are placed in the vehicles and off-board energy storage devices situated in traction substations or between them. Current research is focused mainly on two objectives. The first is to reduce the energy demand by introducing on-board energy storages in light electric vehicles like trams, trolleybuses or electrobuses. The latter is to provide a...
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Triplet energy exchange between fluorescent and phosphorescent organic molecules in a solid state matrix.
PublicationW pracy przedstawiono model wymiany energii trypletów na podstawie mechanizmu Dextera i zweryfikowano go w układzie dwuamina TPD : organiczny komleks Ir(ppy)3: matryca poliwęglanowa, mierząc czasy życia emisji Ir(ppy)3 przy różnych koncentracjach molekuł TPD.
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The effect of low energy impact on the tensile strength of coated and uncoated glass particulate composites.
PublicationPrzedstawiono model teoretyczny pozwalający przewidywać poudarową wytrzymałość na rozciąganie w funkcji parametrów materiałowych i budowy kompozytu. Określono eksperymentalnie poudarową wytrzymałość na ściskanie kompozytów zbrojonych ciągłym włóknem szklanym w osnowie żywicy epoksydowej napełnianej mikrokulkami szklanymi w celu obniżenia skłonności do powstawania dużych zniszczeń przy udarze o niskiej energii. Wyniki eksperymentalnie...
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Effects of metallic silver particles on resonance energy transfer between fluorophores bound to DNA.
PublicationZbadano wpływ filmów wysepek metalicznego srebra na rezonansowe przekazywanie energii między fluoroforami związanymi z DNA. Donorem i akceptorem były odpowiednio 4´,6 diamidyno-2-fenylindon i jodek propydyny. Zmierzone dla tego układu czasy zaniku i widma fluorescencji pokazują, że sąsiedztwo cząstek srebra dramatycznie zwiększa promień Forstera, a tym samym i przekazywanie energii w znakowanym DNA.
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Energy quality improvement by ultra rapid L. V. fault current limiting andinterrupting.
PublicationPrzedstawiono możliwość ograniczania rozprzestrzeniania się zapadów napięcia w sieciach elektroenergetycznych przy zwarciach przez zastosowanie łączników hybrydowych do ultra szybkiego ograniczania i wyłączania prądów zwarciowych. Referat ma na celu przedstawienie dotychczasowych osiągnięć prac badawczych w dziedzinie łączników ultra szybkich, a także poznanie opinii elektroenergetyki i odbiorców na temat celowości wprowadzenia...
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Game theory-based virtual machine migration for energy sustainability in cloud data centers
PublicationAs 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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Born–Oppenheimer potential energy curves of NaK from the optimised atomic basis sets
PublicationThe article presents adiabatic potential energy curves of the ground and excited electronic states for the diatomic NaK molecule. The calculations were made using the ab initio computational methods to include electron correlation. The studied molecule was calculated as the effective two-electron problem, in which only the valence electrons of the molecule are explicitly taken into account. The remaining electrons with atomic nuclei...
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ANALYSIS OF THE FEATURES OF EFFECTIVE IMPLEMENTATION OF SOLAR POWER PLANTS IN LOCAL ENERGY SUPPLY SYSTEMS
PublicationПоказано, що відновлені джерела енергії (ВДЕ) у багатьох країнах дедалі більше домінують на ринку електроенергії, при цьому обсяги генерації електроенергії сонячними електростанціями (СЕС) останніми роками зростають рекордними темпами. Зазначено, що хоча частка ВДЕ продовжує зростати і фотоелектрична індустрія стрімко розвивається, однак галузь все ще стикається з багатьма проблемами, зокрема як продовжувати знижувати нормовану...
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The effect of new non-cross resistant antitumor agents on the energy state of human erythrocytes
PublicationPrzebadano pochodne benzoperimidynowe i antrapirydonowe odnośnie ich wpływu na stan energetyczny ludzkich erytrocytów. Stwierdzono, że poziom nukleotydów jak i wartość AEC erytrocytów nie zmienił się w ciągu 24 h inkubacji z powyższymi związkami. Jest to wynik obiecujący w odniesieniu do ich zastosowania jako związków aktywnych w pokonywaniu oporności wielolekowej.
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Bond-graphs based modelling of hybrid energy systems with permanent magnet brushless machines
PublicationW referacie przedstawiono metodę grafów wiązań (GW) w zastosowaniu do modelowania hybrydowych systemów energetycznych z bezszczotkowymi maszynami o magnesach trwałych (BMMT). W części pierwszej referatu omówiono ogólne formalizm GW. Następnie przedstawiono kolejno: ogólną strukturę modelu hybrydowego systemu energetycznego w ujęciu GW; założenia modelowania maszyn elektrycznych w ujęciu GW, model SBMT w ujęciu GW dla potrzeb modelowania...
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Consideration of Pseudo Strain Energy in Determination of Fatigue Life and Microdamage Healing of Asphalt Mastics
PublicationRest periods between cyclic loads can lead to recovery of damage and extension of fatigue life. This phenomenon is referred to as healing. Healing is clearly observed in bituminous materials, such as asphalt mastics, which belong to the components of asphalt mixtures. Due to the nature of road pavement traffic loading, which is characterized by series of intermittent pulses with rest periods, consideration of healing is necessary...
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Influence of conductive carbon and MnCo2O4 on morphological and electrical properties of hydrogels for electrochemical energy conversion
PublicationIn this work, a strategy for one-stage synthesis of polymer composites based on PNIPAAm hydrogel was presented. Both conductive particles in the form of conductive carbon black (cCB) and MnCo2O4 (MCO) spinel particles were suspended in the three-dimensional structure of the hydrogel. The MCO particles in the resulting hydrogel composite acted as an electrocatalyst in the oxygen evolution reaction. Morphological studies confirmed...
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Förster Resonance Energy Transfer and Trapping in Selected Systems: Analysis by Monte-Carlo Simulations
PublicationMetoda symulacji Monte Carlo została opisana i zastosowana jako efektywne narzędzie do analizy wyników pomiarów transferu energii w wybranych układach, dla których zastosowanie podejścia analitycznego jest ograniczone lub nawet niemożliwe. Pokazano, że symulacja Monte Carlo pozwala obliczyć tzw. czynnik orientacyjny dla układów częściowo uporządkowanych oraz szereg innych wielkości ważnych do opisu zjawiska transferu energii, które...
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A method of vibration surveillance with a use of the optimal control at energy performance index and the acceleration feedback
PublicationDokonano twórczej modyfikacji metody nadzorowania drgań za pomocą sterowania optymalnego przy energetycznym wskaźniku jakości. Zaproponowano oryginalną modyfikację, która polega na bezpośrednim powiązaniu sygnału pomiarowego z akcelerometru i optymalnego sygnału sterującego. Przewidziano obiecujące perspektywy zastosowań praktycznych zmodyfikowanej metody do przypadków frezowania szybkościowego.
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Isothermal Calorimetry and Compressive Strength Tests of Mortar Specimens for Determination of Apparent Activation Energy
PublicationThe hydration process of cementitious materials involves a thermally activated reaction that depends on the composition of the mixture and the curing temperature. The main parameter affecting the temperature variation of cast-in-place concrete is the apparent activation energy, which can be used for the efficient prediction of the temperature evolution and maturity index of hardening concrete. This paper discusses two methods to...
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Onboard Energy Storage and Power Management Systems forAll-Electric Cargo Vessel Concept
PublicationThis paper presents an innovative approach to the design of a forthcoming, fully electric-powered cargo vessel. This work begins by defining problems that need to be solved when designingvessels of this kind. Using available literature and market research, a solution for the design of apower management system and a battery management system for a cargo vessel of up to 1504 TEUcapacity was developed. The proposed solution contains...
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Sustainable energy system combined biogas-feedSolid Oxide Fuel Cell and Microalgae technology
PublicationIn the new frontier of energy and environmental safety, new efficient and clean safe energy conversion systems are required. In this sense, the present work is framed within the context of Circular Economy and proposes a multidisciplinary study for the development of more efficient, economically viable and non-polluting energy conversion systems, based on the synergetic combination of different technologies: fuel cells, biofuels,...
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The energy approach to fatigue crack growth of S355 steel welded specimens subjected to bending
PublicationThe study presents the results of the research on the rate of fatigue crack growth subjected to bending in the ferritic-pearlitic structure. The studies were carried out at a constant amplitude of the moment and at various values of the load ratios R and at the operating frequency of the machine of 28.4 Hz. Flat specimens made of S355 steel and with fillet welds and with double-sided blunt external notches as well as concave...
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Household Ability of Expenditures on Electricity and Energy Resources in the Countries That Joined the EU after 2004
PublicationThe purpose of the following article is to present the situation of the energy market from a household perspective between 2010 and 2020 in selected EU countries (the group of member states which joined EU after 2004). The selected countries when joining the EU had similar economic indicators and to some extent were similar in other macro-economic situations (personal income, unemployment rate, GDP level and annual growth). This...
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Modeling nutrient removal and energy consumption in an advanced activated sludge system under uncertainty
PublicationActivated sludge models are widely used to simulate, optimize and control performance of wastewater treatment plants (WWTP). For simulation of nutrient removal and energy consumption, kinetic parameters would need to be estimated, which requires an extensive measurement campaign. In this study, a novel methodology is proposed for modeling the performance and energy consumption of a biological nutrient removal activated sludge system...
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Analysis of accumulation possibility of energy dissipated in the braking process of train driven by hybrid locomotive
PublicationW tradycyjnym procesie hamowania cała energia kinetyczna lub potencjalna pociągu napędzanego lokomotywą z silnikiem spalinowym jest rozpraszana do otoczenia w postaci energii cieplnej. W lokomotywach hybrydowych istnieje możliwość odzyskania części tej energii przez przekazanie jej do akumulatorów i ponowne wykorzystanie do napędu pociągu. W pracy przedstawiono model układu napędowego lokomotywy hybrydowej z silnikiem spalinowym,...
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Ukrainian Market of Electrical Energy: Reforming, Financing, Innovative Investment, Efficiency Analysis, and Audit
PublicationThe aim of this research is to determine the influence of electrical energy market regulation reform in Ukraine on the competitive environment, the reproduction processes of financial and innovative support, and the energy efficiency of the national economy. The authors have put forward and verified the hypothesis that, under conditions of institutional maturity of the Ukrainian electrical energy market, its liberalization and...
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Energy Efficiency Study of Audio-video Content Consumption on Selected Android Mobile Terminals
PublicationMobile devices are widely used by billions of users worldwide. Thanks to their main advantage, which is portability, they should be fully operational as long as possible, without the need to recharge or connect them to external power sources. This paper describes a study, carried out on four different mobile devices, with different hardware and software parameters, running the Android operating system. The research campaign involved...
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An inclination in Thermal Energy Using Nanoparticles with Casson Liquid Past an Expanding Porous Surface
PublicationPhysical aspects of inclined MHD nanofluid towards a stretching sheet embedded in a porous medium are visualized. Two types of nanoparticles are used named as copper and alumna dioxide with water as base fluid. Similarity transformations are used to convert the partial differential equations into the set of ordinary differential equation. Closed solutions are found to examine the velocity and the temperature profiles. It is examined...
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The Dilemmas of Choosing a Suitable Technology for Low Energy and Passive Houses in the Context of their Overheating Issues
PublicationIn compliance with European Union directives, numerous countries are introducing increasingly stricter legal limits on the estimated energy consumption of newly designed residential buildings. However, the fact, that regulations and designers' efforts are focused on decreasing energy consumption (and consequently carbon dioxide emissions) only at the post-occupancy stage, may lead to a significant increase in the carbon footprint...
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Energy Loss Coefficients ki in a Displacement Pump and Hydraulic Motor used in Hydrostatic Drives
PublicationThe article aims at defining and analysing the energy loss coefficients in design solutions of rotating displacement machines, with a piston machine as an example. The energy losses observed in these machines include mechanical loss, volumetric loss, and pressure loss. The scale and relations between these losses in different machines depend on machine design and manufacturing quality, and on operating parameters. The operating...
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Emisja rtęci z polskiej energetyki = Mercury emission from polish energy sector
PublicationEnergetyka jest głównym źródłem emisji rtęci- według krajowej inwentaryzacji emisji metali ciężkich. Jednak podawana emisja z elektrowni i elektrociepłowni spalających węgiel kamienny wydaje się być zawyżona. Najnowsze badania wykazują niższą zawartość rtęci w węglu kamiennym (50-150 ppb) niż w węglu brunatnym (120-370ppb). Istnieje zatem potrzeba weryfikacji stosowanych wskaźników emisji dla procesów spalania węgla, które służą...
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Extended investigation of performance-energy trade-offs under power capping in HPC environments
Publication—In the paper we present investigation of performance-energy trade-offs under power capping using modern processors. The results are presented for systems targeted at both server and client markets and were collected from Intel Xeon E5 and Intel Xeon Phi server processors as well as from desktop and mobile Intel Core i7 processors. The results, when using power capping, show that we can find various interesting combinations of...
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Energy-Aware High-Performance Computing: Survey of State-of-the-Art Tools, Techniques, and Environments
PublicationThe paper presents state of the art of energy-aware high-performance computing (HPC), in particular identification and classification of approaches by system and device types, optimization metrics, and energy/power control methods. System types include single device, clusters, grids, and clouds while considered device types include CPUs, GPUs, multiprocessor, and hybrid systems. Optimization goals include various combinations of...