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Search results for: ENERGY PERFORMANCE OF BUILDINGS
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Systems for storing and reducing energy consumption in residential buildings
PublicationW pracy przeprowadzany został przegląd różnych koncepcji magazynów energii cieplnej zintegrowanych z budynkiem mieszkalnym. Przedstawione zostały warianty różniące się między sobą pod względem kształtu, rozmiaru, wypełnienia, sposobu instalacji itp. Opisany został sposób zintegrowania systemów magazynujących z odnawialnymi źródłami energii. Następnie wskazane zostały inne rozwiązania projektowe umożliwiające redukcję zapotrzebowania...
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Influence of external climate on natural ventilation performance in buildings
PublicationNatural ventilation is driven by either buoyancy forces or wind pressure forces or their combinations that inherit stochastic variation into ventilation rates [ CITATION Hun99 \l 1045 ]. We now that these factors have influence on air flow speed and thermal comfort inside building. This work examines the relationship between external climate and natural ventilation including thermal comfort. The work tries in the first instance...
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Social and Infrastructural Conditioning of Lowering Energy Costs and Improving the Energy Efficiency of Buildings in the Context of the Local Energy Policy
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Analysis of the Dependence between Energy Demand Indicators in Buildings Based on Variants for Improving Energy Efficiency in a School Building
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Machine learning-based seismic response and performance assessment of reinforced concrete buildings
PublicationComplexity and unpredictability nature of earthquakes makes them unique external loads that there is no unique formula used for the prediction of seismic responses. Hence, this research aims to implement the most well-known Machine Learning (ML) methods in Python software to propose a prediction model for seismic response and performance assessment of Reinforced Concrete Moment-Resisting Frames (RC MRFs). To prepare 92,400 data...
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An Innovative Decision Support System to Improve the Energy Efficiency of Buildings in Urban Areas
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DEPO: A dynamic energy‐performance optimizer tool for automatic power capping for energy efficient high‐performance computing
PublicationIn the article we propose an automatic power capping software tool DEPO that allows one to perform runtime optimization of performance and energy related metrics. For an assumed application model with an initialization phase followed by a running phase with uniform compute and memory intensity, the tool performs automatic tuning engaging one of the two exploration algorithms—linear search (LS) and golden section search (GSS), finds...
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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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Improved energy management technique in pipe-embedded wall heating/cooling system in residential buildings
PublicationEffective and environmentally responsive techniques of energy management in residential buildings are desirable for the resulting reduction of energy costs and consumption. In this paper, an improved and efficient technique of energy management in pipe-embedded wall heating/cooling systems, called the Thermal Barrier, is described. Specifically, the Thermal Barrier is a technique focused on the management and control of heat...
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Improved energy management technique in pipe-embedded wall heating/cooling system in residential buildings
PublicationEffective and environmentally responsive techniques of energy management in residential buildings are desirable for the resulting reduction of energy costs and consumption. In this paper, an improved and efficient technique of energy management in pipe-embedded wall heating/cooling systems, called the Thermal Barrier, is described. Specifically, the Thermal Barrier is a technique focused on the management and control of heat supply...
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Energy-Aware Scheduling for High-Performance Computing Systems: A Survey
PublicationHigh-performance computing (HPC), according to its name, is traditionally oriented toward performance, especially the execution time and scalability of the computations. However, due to the high cost and environmental issues, energy consumption has already become a very important factor that needs to be considered. The paper presents a survey of energy-aware scheduling methods used in a modern HPC environment, starting with the...
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Modeling of Performance, Reliability and Energy Efficiency in Large-Scale Computational Environment
PublicationLarge scale of complexity of distributed computational systems imposes special challanges for prediction of quality in such systems.Existing quality models for lower-scale systems include functionality,performance,reliability,flexibility and usability.Among these attributes,performance and reliability have a particular significance to the large-scale systems computing quality modeling due to their strong dependence on the system...
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Modeling of Performance, Reliability and Energy Efficiency in Large-Scale Computational Environments
PublicationLarge scale of complexity of distributed computational systems imposes special challenges for prediction of quality in such systems. Existing quality models for lower-scale systems include functionality, performance, reliability, flexibility and usability. Among these attributes, performance and reliability have a particular significance to the large-scale systems computing quality modeling due to their strong dependence on the...
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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.
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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.
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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...
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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...
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Three-wheeled mobile platform powered by LabVIEW at energy performance index
PublicationW pracy opisano trójkołową platformę mobilną własnej konstrukcji, zbudowaną i kontrolowaną z wykorzystaniem środowiska LabVIEW. W celu realizacji ruchu platformy oraz zapewnienia jego nadzorowania w czasie rzeczywistym, zastosowano sterownik NI cRIO. Zastosowane równolegle techniki projektowania mechatronicznego, tj. wirtualne prototypowanie, symulacje w trybie HILS oraz szybkie prototypowanie na obiekcie docelowym, umożliwiły...
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Performance/energy aware optimization of parallel applications on GPUs under power capping
PublicationIn the paper we present an approach and results from application of the modern power capping mechanism available for NVIDIA GPUs to the bench- marks such as NAS Parallel Benchmarks BT, SP and LU as well as cublasgemm- benchmark which are widely used for assessment of high performance computing systems’ performance. Specifically, depending on the benchmarks, various power cap configurations are best for desired trade-off of performance...
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A modified method of vibration surveillance by using the optimal control at energy performance index
PublicationA method of vibration surveillance by using the optimal control at energy performance index has been creatively modified. The suggested original modification depends on consideration of direct relationship between the measured acceleration signal and the optimal control command. The paper presents the results of experiments and Hardware- in-the-loop simulations of a new active vibration reduction algorithm based on the energy...
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Effect of Vascular Lumen Reduction on the Performance and Energy Consumption of an Innovative Implantable LVAD
PublicationThis paper presents the results of a study on the effect of vascular lumen reduction on the performance of an innovative implantable LVAD (left ventricular assist device). It details the pressures in the individual cardiac chambers as a function of device frequency. In addition, mass flow rates and energy consumption of the device are examined, varying with lumen reduction and operating frequency. While the lumen reduction of the...
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A possibility of vibration surveillance of the hybrid systems by the optimal control at energy performance index.
PublicationPraca poświęcona jest nadzorowaniu drgań niestacjonarnych układów mechanicznych modelowanych metodą elementów skończonych. W celu redukcji poziomu drgań wprowadzono zewnętrzne sygnały sterujące. Zdefiniowano uzmienniony w czasie energetyczny wskaźnik jakości. Uwzględnienie założenia o możliwości podziału układu na podukład modalny, podukład strukturalny oraz podukład łączący umożliwiło opis układu sterowanego we współrzędnych hybrydowych....
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Enhancing seismic performance of steel buildings having semi-rigid connection with infill masonry walls considering soil type effects
PublicationUnpreventable constructional defects are the main issues in the case of steel Moment-Resisting Frames (MRFs) that mostly occur in the rigidities of beam-to-column connections. The present article aims to investigate the effects of different rigidities of structures and to propose Infill Masonry Walls (IMWs) as retrofitting strategy for the steel damaged buildings. A fault or failure to meet a certain consideration of the soil type...
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Grid-Forming Operation of Energy-Router Based on Model Predictive Control with Improved Dynamic Performance
PublicationThe focus of this study is on the grid-forming operation of the Energy Router (ER) based on Model Predictive Control (MPC). ER is regarded as a key component of microgrids. It is a converter that interfaces the microgrid (s) with the utility grid. The ER has a multiport structure and bidirectional energy flow control. The ER concept can be implemented in Nearly Zero-Energy Buildings (NZEB) to provide flexible energy control. A...
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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...
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Optimal control at energy performance index of the mobile robots following dynamically created trajectories
PublicationIn practice, the problem of motion control of the wheeled mobile robots is often neglected. Wheeled mobile robots are strongly nonlinear systems and restricted by non-holonomic constraints. Motion control of such systems is not trivial task and usage of non-optimal control signals can lead to deterioration of the overall robot system’s performance. In case of autonomous application of the mobile robots all parts of its control...
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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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Performance and Energy Aware Training of a Deep Neural Network in a Multi-GPU Environment with Power Capping
PublicationIn this paper we demonstrate that it is possible to obtain considerable improvement of performance and energy aware metrics for training of deep neural networks using a modern parallel multi-GPU system, by enforcing selected, non-default power caps on the GPUs. We measure the power and energy consumption of the whole node using a professional, certified hardware power meter. For a high performance workstation with 8 GPUs, we were...
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Performance of the AMOEBA Water Model in the Vicinity of QM Solutes: A Diagnosis Using Energy Decomposition Analysis
PublicationThe importance of incorporating solvent polarization effects into the modeling of solvation processes has been well-recognized, and therefore a new generation of hybrid quantum mechanics/molecular mechanics (QM/MM) approaches that accounts for this effect is desirable. We present a fully self-consistent, mutually polarizable QM/MM scheme using the AMOEBA force field, in which the total energy of the system is variationally minimized...
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Grid-Forming Operation of Energy-Router Based on Model Predictive Control with Improved Dynamic Performance
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Symmetric Supercapacitors Based on MnOOH‐Coated Nanoporous Carbon toward High Energy‐Storage Performance
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A frequency-domain surveillance of the robot's structural vibration with a use of modal control at energy performance index
PublicationRozważano drgania niestacjonarnego układu nośnego robota IRb-6. W celu nadzorowania drgań zastosowano algorytm sterowania modalnego przy energetycznym wskaźniku jakości w dziedzinie częstotliwości. Podejście takie umożliwia wykorzystanie elementów projektowania mechatronicznego do nadzorowania drgań, którego celem jest minimalizacja amplitudy drgań końcówek manipulacyjnych, a w konsekwencji - poprawa dokładności i powtarzalności...
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Mechatronics in the design of three wheeled mobile platform controlled by surveillance system at energy performance index
PublicationPraca jest poświęcona projektowaniu mechatronicznemu trójkołowej platformy mobilnej, sterowanej systemem nadzorowania bazującym na energetycznym wskaźniku jakości. Zdefiniowany zakres badań i silna nieliniowość obiektu wymagały niezawodnego systemu sterowania. Warunki deterministyczne i zastosowany algorytm wpłynęły na wybór metody opracowania systemu. Przedstawione techniki projektowania mechatronicznego i przeprowadzone warianty...
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Modification of the structural model of manipulator's carrying system for a use of modal control at energy performance index.
PublicationW pracy rozważa się drgania niestacjonarnego układu nośnego manipulatora IRb-6 modelowanego dyskretnie metodą sztywnych elementów skończonych. Z uwagi na gwałtowne ruchy (start, zatrzymanie) poszczególnych członów manipulatora, jest to problem o dużym znaczeniu praktycznym. Jednym ze sposobów nadzorowania tych drgań jest wykorzystanie sterowania modalnego przy energetycznym wskaźniku jakości. Uwzględnia on zmianę w czasie względem...
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Archives of civil engineering. Intelligent graphic modeler integrating FE analisys of transient heat transfer with early computer-aided design of energy-efficient buildings
PublicationW pracy zaprezentowano nowatorski Modeler Rozmyty, w którym zaimplementowano unikalną koncepcję rozpoznawania. Modeler Rozmyty dokonuje ekstrakcji danych geometrycznych poprzez rozpoznanie i identyfikację niedokładnych i niejednorodnych rysunków, złożonych z prostych obiektów graficznych.
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HILS for the Design of Three-Wheeled Mobile Platform Motion Surveillance System with a Use of Energy Performance Index
PublicationCurrent tendency in mechatronic design requires the use of comprehensive development of an environment, which gives the possibility to prototype, design, simulate and integrate with dedicated hardware. The paper discusses the Hardware-In-the-Loop Simulations (HILS) mechatronic technique, used during the design of the surveillance system based on energy performance index. The presented test configuration (physical controller – emulated...
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Air-cooled photovoltaic roof tile as an example of the BIPVT system – An experimental study on the energy and exergy performance
PublicationThe air-cooled photovoltaic tile is a subject of presented investigations, which focused on improving the overall system efficiency of PV tiles with heat recovery. The operational efficiency of a PV roof tile, together with the construction optimising the air cooling efficiency, were the main points of plans realized at this research stage. The article describes the experimental research consisting of the assessment of electrical,...
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Tailoring a low-energy ball milled MnCo2O4 spinel catalyst to boost oxygen evolution reaction performance
PublicationThe development of cost-efficient oxygen evolution reaction (OER) catalysts is one of the most important tasks facing modern techniques for hydrogen production. In this work, for the first time, a low-energy ball milling process of MnCo2O4 (MCO) spinel powders, with a mechanical modification time exceeding 1 day was used. After 6 days of ball-milling, the obtained overpotential of the electrocatalyst reached the value of 375 mV...
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GPU Power Capping for Energy-Performance Trade-Offs in Training of Deep Convolutional Neural Networks for Image Recognition
PublicationIn the paper we present performance-energy trade-off investigation of training Deep Convolutional Neural Networks for image recognition. Several representative and widely adopted network models, such as Alexnet, VGG-19, Inception V3, Inception V4, Resnet50 and Resnet152 were tested using systems with Nvidia Quadro RTX 6000 as well as Nvidia V100 GPUs. Using GPU power capping we found other than default configurations minimizing...
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Dynamic GPU power capping with online performance tracing for energy efficient GPU computing using DEPO tool
PublicationGPU accelerators have become essential to the recent advance in computational power of high- performance computing (HPC) systems. Current HPC systems’ reaching an approximately 20–30 mega-watt power demand has resulted in increasing CO2 emissions, energy costs and necessitate increasingly complex cooling systems. This is a very real challenge. To address this, new mechanisms of software power control could be employed. In this...
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Analyzing energy/performance trade-offs with power capping for parallel applications on modern multi and many core processors
PublicationIn the paper we present extensive results from analyzing energy/performance trade-offs with power capping observed on four different modern CPUs, for three different parallel applications such as 2D heat distribution, numerical integration and Fast Fourier Transform. The CPU tested represent both multi-core type CPUs such as Intel⃝R Xeon⃝R E5, desktop and mobile i7 as well as many-core Intel⃝R Xeon PhiTM x200 but also server, desktop...
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The optimal control at energy performance index as a rule for vibration surveillance in the hybrid system by on example of milling flexible details
PublicationPraca dotyczy nadzorowania drgań w niestacjonarnych układach mechanicznych za pomocą sterowania optymalnego pry energetycznym wskaźniku jakości. W układzie drgającym wyodrębniono podukłady: modalny, strukturalny oraz łączący. Dynamikę układu sterowanego opisano we współrzędnych hybrydowych. Przedstawiono przykład nadzorowania drgań podczas obróbki przedmiotów podatnych smukłym frezem kulistym. Paramatry obliczeniowego modelu modalnego...
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Influence of hydrochloric acid concentration and type of nitrogen source on the electrochemical performance of TiO2/N-MoS2 for energy storage applications
PublicationIn this work, nitrogen-doped molybdenum sulfide was directly deposited on titanium dioxide nanotubes substrate (TiO2/N-MoS2) during hydrothermal synthesis. The study focuses on the influence of hydrochloric acid concentration used for the synthesis, with the results indicating its essential role in thioacetamide hydrolysis and thus in the effectiveness of the N-MoS2 deposition. The electrode material itself is characterized by...
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The method for determining the theoretical operation of ship diesel engines in terms of energy and assessment of the real operation of such engines, including indicators of their performance
PublicationDziałanie dowolnego silnika o zapłonie samoczynnym rozumiane jest jako przekazywanie odbiornikowi energii w ustalonym czasie, w którym energia jest przetwarzana i przenoszona na sposób (w formie) pracy i ciepła. Wartościowanie działania silników spalinowych instalowanych w siłowniach okrętowych, zaproponowane przez autora tego artykułu, polega na przyrównaniu działania tego rodzaju silników do wielkości fizycznej, której jednostką...
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On the rising extra storage capacity of ultra-small Fe3O4particles functionalized with HCS and their potential as high-performance anode material for electrochemical energy storage
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Computer simulation of vibration surveillance of discretely idealised mechanical systems. Part I: Optimal control at the energy performance index for open non-stationary systems
PublicationPraca dotyczy sposobów nadzorowania drgań mechanicznych z wykorzystanie elementów teorii sterowania, optymalizacji dynamicznej, nowoczesnych metod symulacji komputerowej oraz technik pomiarowych. Do modelowania niestacjonarnego układu sterowanego zastosowano mieszaną metodą sztywnych i odkształcalnych elementów skończonych. Opracowano metodę nadzorowania drgań w dziedzinie czasu, z wykorzystaniem sterowania optymalnego przy energetycznym...
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Boundary conditions for non-residential buildings from the user’s perspective: literature review
PublicationBackground and objective: This paper aims to review the boundary conditions (B/C) in specific categories (energy, building use, and lighting) within non-residential buildings to pave the way to a better understanding of users’ requirements and needs of the built environment. For this paper, B/C are understood as unique preconditions, specific characteristics for use, determining specific features of buildings, enabling an accurate...
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Thermal Barrier as a technique of indirect heating and cooling for residential buildings
PublicationW artykule zaprezentowano koncept pośredniego ogrzewania i chłodzenia budynków mieszkalnych promieniowaniem słonecznym zwany barierą termiczną. System składa się z polipropylenowych rurek umieszczonych w ścianach zewnętrznych, w których znajduje się płyn. Koncept jest zastosowany do stabilizacji i redukcji przepływu ciepła w kierunku prostopadłym do ścian. Wykonano obszerne obliczenia MES z zastosowaniem nowego systemu kontroli,...
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Lighting conditions in Home Office and occupant’s perception: an international study
PublicationThe global pandemic and physical distancing restrictions are forcing us to rethink how residential buildings are used regarding the visual environment. This paper describes home office lighting conditions within different countries and continents. The aim is to define the current limitations of home offices in providing a resilient visual environment. The work was developed by a team of international experts working together on...