Thematische Bibliographien / Energetical optimization

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Auswahl der wissenschaftlichen Literatur zum Thema „Energetical optimization“

Autor: Grafiati

Veröffentlicht am 23. März 2023

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Zeitschriftenartikel zum Thema "Energetical optimization"

S\^arbu, Ioan, und Gabriel Ostafe. „Energetical optimization of water distribution systems in large urban centers“. Periodica Polytechnica Mechanical Engineering 52, Nr. 2 (2008): 93. http://dx.doi.org/10.3311/pp.me.2008-2.09.

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Suzuki, A. „Cascade Connection of Solar Collectors for Effective Energy Gain“. Journal of Solar Energy Engineering 108, Nr. 3 (01.08.1986): 172–77. http://dx.doi.org/10.1115/1.3268089.

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The theoretical analysis and optimization of two different types of solar collectors connected in series are presented. The energetical approach to the cascade system with two types of collectors has revealed the importance of the product of the collector efficiency factor and the optical efficiency. If the value of the first collector is larger than that of the succeeding one, then the cascade system is found to be more effective than using either one of the collectors alone. Furthermore, the optimum operating conditions for the system including the determination of the suitable area ratio can be uniquely obtained from the consideration of the maximum exergy gain.

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Entezari, Ashkan, Ali Manizadeh und Rouhollah Ahmadi. „Energetical, exergetical and economical optimization analysis of combined power generation system of gas turbine and Stirling engine“. Energy Conversion and Management 159 (März 2018): 189–203. http://dx.doi.org/10.1016/j.enconman.2018.01.012.

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Hervieu, Alexandre, Arnaud Le Bris und Clément Mallet. „FUSION OF HYPERSPECTRAL AND VHR MULTISPECTRAL IMAGE CLASSIFICATIONS IN URBAN α–AREAS“. ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences III-3 (06.06.2016): 457–64. http://dx.doi.org/10.5194/isprs-annals-iii-3-457-2016.

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An energetical approach is proposed for classification decision fusion in urban areas using multispectral and hyperspectral imagery at distinct spatial resolutions. Hyperspectral data provides a great ability to discriminate land-cover classes while multispectral data, usually at higher spatial resolution, makes possible a more accurate spatial delineation of the classes. Hence, the aim here is to achieve the most accurate classification maps by taking advantage of both data sources at the decision level: spectral properties of the hyperspectral data and the geometrical resolution of multispectral images. More specifically, the proposed method takes into account probability class membership maps in order to improve the classification fusion process. Such probability maps are available using standard classification techniques such as Random Forests or Support Vector Machines. Classification probability maps are integrated into an energy framework where minimization of a given energy leads to better classification maps. The energy is minimized using a graph-cut method called quadratic pseudo-boolean optimization (QPBO) with &alpha;-expansion. A first model is proposed that gives satisfactory results in terms of classification results and visual interpretation. This model is compared to a standard Potts models adapted to the considered problem. Finally, the model is enhanced by integrating the spatial contrast observed in the data source of higher spatial resolution (i.e., the multispectral image). Obtained results using the proposed energetical decision fusion process are shown on two urban multispectral/hyperspectral datasets. 2-3% improvement is noticed with respect to a Potts formulation and 3-8% compared to a single hyperspectral-based classification.

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Dechesne, C., C. Mallet, A. Le Bris und V. Gouet-Brunet. „SEMANTIC SEGMENTATION OF FOREST STANDS OF PURE SPECIES AS A GLOBAL OPTIMIZATION PROBLEM“. ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-1/W1 (30.05.2017): 141–48. http://dx.doi.org/10.5194/isprs-annals-iv-1-w1-141-2017.

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Forest stand delineation is a fundamental task for forest management purposes, that is still mainly manually performed through visual inspection of geospatial (very) high spatial resolution images. Stand detection has been barely addressed in the literature which has mainly focused, in forested environments, on individual tree extraction and tree species classification. From a methodological point of view, stand detection can be considered as a semantic segmentation problem. It offers two advantages. First, one can retrieve the dominant tree species per segment. Secondly, one can benefit from existing low-level tree species label maps from the literature as a basis for high-level object extraction. Thus, the semantic segmentation issue becomes a regularization issue in a weakly structured environment and can be formulated in an energetical framework. This papers aims at investigating which regularization strategies of the literature are the most adapted to delineate and classify forest stands of pure species. Both airborne lidar point clouds and multispectral very high spatial resolution images are integrated for that purpose. The local methods (such as filtering and probabilistic relaxation) are not adapted for such problem since the increase of the classification accuracy is below 5%. The global methods, based on an energy model, tend to be more efficient with an accuracy gain up to 15%. The segmentation results using such models have an accuracy ranging from 96% to 99%.

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Saramak, Agnieszka, und Daniel Saramak. „Coal Modeling Investigations in International Collaboration in the Light of Bibliometric Analysis of the Problem“. Energies 15, Nr. 16 (20.08.2022): 6040. http://dx.doi.org/10.3390/en15166040.

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The article concerns an analysis of records registered in Web of Science (WoS) database related to the problem of coal modeling. All publications registered in the WoS from the time period 1951–2021 were analyzed, mostly in terms of international collaboration, merit content and research areas. It appeared that international scientific cooperation on this topic is differently considered, depending on the country. The leader in terms of the number of documents remains China, while the highest citation counts were gained by research teams, with the USA as the leader. Several sub-categories within research areas could be also divided on the basis of key words, while the most popular topic is connected with energetical aspects of coal utilization.

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Hülsemann, Benedikt, Torsten Mächtig, Marcel Pohl, Jan Liebetrau, Joachim Müller, Eberhard Hartung und Hans Oechsner. „Comparison of Biological Efficiency Assessment Methods and Their Application to Full-Scale Biogas Plants“. Energies 14, Nr. 9 (22.04.2021): 2381. http://dx.doi.org/10.3390/en14092381.

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For calculation of biological efficiency of a biogas plant (BP), it is required to determine the specific methane potential (SMP) of the substrate. A study comparing available methods for determination of SMP and the comparison with data of full-scale BPs is missing but necessary according to the differences in process conditions between both. Firstly, mass and mass associated energy balances of 33 full-scale BPs were calculated and evaluated. The results show plausible data for only 55% of the investigated BPs. Furthermore, conversion and yield efficiencies were calculated according to six different methods for SMP determination. The results show a correlation between the measured on-site specific methane yield and the calculated SMP by methods based on biological degradability. However, these methods underestimate the SMP. Calculated SMPs based on calorific values are higher, but less sensitive. A combination of biochemical and energetical methods is a promising approach to evaluate the efficiency.

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Wong, Jeremy D., Jessica C. Selinger und J. Maxwell Donelan. „Is natural variability in gait sufficient to initiate spontaneous energy optimization in human walking?“ Journal of Neurophysiology 121, Nr. 5 (01.05.2019): 1848–55. http://dx.doi.org/10.1152/jn.00417.2018.

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In new walking contexts, the nervous system can adapt preferred gaits to minimize energetic cost. During treadmill walking, this optimization is not usually spontaneous but instead requires experience with the new energetic cost landscape. Experimenters can provide subjects with the needed experience by prescribing new gaits or instructing them to explore new gaits. Yet in familiar walking contexts, people naturally prefer energetically optimal gaits: the nervous system can optimize cost without an experimenter’s guidance. Here we test the hypothesis that the natural gait variability of overground walking provides the nervous system with sufficient experience with new cost landscapes to initiate spontaneous minimization of energetic cost. We had subjects walk over paths of varying terrain while wearing knee exoskeletons that penalized walking as a function of step frequency. The exoskeletons created cost landscapes with minima that were, on average, 8% lower than the energetic cost at the initially preferred gaits and achieved at walking speeds and step frequencies that were 4% lower than the initially preferred values. We found that our overground walking trials amplified gait variability by 3.7-fold compared with treadmill walking, resulting in subjects gaining greater experience with new cost landscapes, including frequent experience with gaits at the new energetic minima. However, after 20 min and 2.0 km of walking in the new cost landscapes, we observed no consistent optimization of gait, suggesting that natural gait variability during overground walking is not always sufficient to initiate energetic optimization over the time periods and distances tested in this study. NEW & NOTEWORTHY While the nervous system can continuously optimize gait to minimize energetic cost, what initiates this optimization process during every day walking is unknown. Here we tested the hypothesis that the nervous system leverages the natural variability in gait experienced during overground walking to converge on new energetically optimal gaits created using exoskeletons. Contrary to our hypothesis, we found that participants did not adapt toward optimal gaits: natural variability is not always sufficient to initiate spontaneous energy optimization.

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Hrechyn, Bohdan, Yevhen Krykavskyy und Jacek Binda. „The Development of a Model of Economic and Ecological Evaluation of Wooden Biomass Supply Chains“. Energies 14, Nr. 24 (20.12.2021): 8574. http://dx.doi.org/10.3390/en14248574.

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This scientific publication is dedicated to the development of scientific methodological and practical recommendations about the formation of ecologistics approaches towards usage of the energetical potential of wooden biomass as a promising trend of economic activity subject development. The hierarchy of ecological chain build-up is established, which will allow one to effectively organize the logistics of supply of biomass to the place of energy production. The methodological approaches to modeling of economic and ecological evaluation of wooden mass supply chain were improved. It is aimed to the calculation of expanses and harmful emissions that depend on specific logistics processes in implementation of perspective actions of collection and recycling of wooden biomass and substitution of non-renewable energy sources by it, which, on the one hand, analyzes the actual state of affairs of knowledge in the field of ecological processes evaluation, and on the other hand, however, identifies restrictions on the amounts of potential provision of biomass. Due to the proposed model of economic and ecological evaluation of the supply chain of wooden biomass and the development of software with a database that covers information on specific logistics processes, it will be possible to conduct economic and ecological evaluation on each step of the logistics chain, present specific processes in cash equivalents, depict ecological effectiveness, and identify the most vulnerable points of the logistics system, opening vast opportunities for improvement of other supply systems.

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MANNSFELD, STEFAN C. B., und TORSTEN FRITZ. „ADVANCED MODELLING OF EPITAXIAL ORDERING OF ORGANIC LAYERS ON CRYSTALLINE SURFACES“. Modern Physics Letters B 20, Nr. 11 (10.05.2006): 585–605. http://dx.doi.org/10.1142/s0217984906011189.

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A fine balance between weak molecule-molecule interactions and usually only weakly laterally varying molecule-substrate interactions governs the physical structure of organic-inorganic and organic-organic heteroepitaxial thin films. Therefore, it is important to investigate the energetics of realistically large overlayer domains. So far, Potential calculations for large domains of organic overlayers on crystalline substrates were computationally demanding due to the vast number of atoms to be considered. Here, we present a technique which for the first time enables the calculation of both the molecule-substrate interaction potential and the molecule-molecule interaction potential for large molecular domains (up to several thousands of rather large molecules) by utilizing potential energy grid files. This technique does not only allow the investigation of the substrate influence but also full Monte-Carlo based structural optimizations, if applied to 2D crystalline overlayers. Furthermore, it provides an estimate for the energetic gain combined with the differently aligned overlayer domains. In several examples we will discuss the usefulness of this method. As a general result, we will provide evidence that energetically favorable lattice structures in OMBE systems are not restricted to commensurate unit cells or coincident super cells.

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Dissertationen zum Thema "Energetical optimization"

Baysset, Guillaume. „Modélisation et simulation thermique de différentes architectures de chaine de traction d'un véhicule hybride“. Electronic Thesis or Diss., Ecole centrale de Nantes, 2022. http://www.theses.fr/2022ECDN0022.

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Afin de réduire les émissions de polluants et de CO2 les constructeurs automobiles se tournent de plus en plus versdes solutions de chaîne de traction électrifiées. Cette électrification des véhicules augmente la complexité des systèmes à concevoir. Les outils MBSE basés sur une approche système peuvent être utilisés pour gérer cette complexité grandissante. Une optimisation globale nécessite de s’intéresser aux trois niveaux de conception suivants : architecture, composant et contrôle. L’objectif de cette thèse est de développer une méthode d’optimisation globale pour la conception de systèmes de refroidissement pour véhicules hybrides. A partir d’un jeu de composants et d’exigences systèmes à satisfaire, la méthode commence par générer automatiquement toutes les solutions possibles. La génération d’architectures est basée sur un concept d’arbre de décision. Chaque solution est ensuite optimisée d’un point de vue énergétique sous des contraintes hydrauliques, thermiques et d’intégration. Enfin, une optimisation multicritère permetd’aider les ingénieurs à prendre des décisions sur les choix de solution en phase amont de projet. L’application de la méthode globale d’optimisation de circuit de refroidissement pour véhicule HEV sur un projet existant chez Renault a montré que le système est porté par ses exigences. Une modification des exigences système est susceptible de modifier la solution d’architecture système optimale par rapport au cahier des charges
To reduce CO2 and pollutant emissions, automotive manufacturers tend to turn increasingly towards electrified powertrains solutions, such as Hybrid Vehicles (HEV). Model Based System engineering (MBSE) and computational tools are useful to support the development of HEV systems. Global optimization needs to investigate the following system design level: architecture, component and control. The aim of this thesis is to develop a global optimization framework to design cooling system for hybrid vehicles. The methodology starts from a set of component and system requirements to automatically generate all possible system architectures. The generation of solution is based on a concept of decision tree. An energentical optimisation under hydraulic, thermal and integration cosntraitns is done on each solution generated. Finally, amulticritetria optimization is used as decision making tool to support engineers on system archtiecture choices early in the development process. This framework has been applied on a Renault project. Results showed that the system is highly dependent on its requirements. Changing system requirements can potentially modify the optimal system architecture regarding the system specifications

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Kiran, Bangalore Ravi. „Energetic-lattice based optimization“. Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1091/document.

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La segmentation hiérarchique est une méthode pour produire des partitions qui représentent une même image de manière de moins en moins fine. En même temps, elle sert d'entrée à la recherche d'une partition optimale, qui combine des extraits des diverses partitions en divers endroits. Le traitement hiérarchique des images est un domaine émergent en vision par ordinateur, et en particulier dans la communauté qui étudie les images hyperspectrales et les SIG, du fait de son capacité à structurer des données hyper-dimensionnelles. Le chapitre 1 porte sur les deux concepts fondamentaux de tresse et de treillis énergétique. La tresse est une notion plus riche que celle de hiérarchie de partitions, en ce qu'elle incorpore, en plus, des partitions qui ne sont pas emboîtées les unes dans les autres, tout en s'appuyant globalement sur une hiérarchie. Le treillis énergétique est une structure mixte qui regroupe une tresse avec une énergie, et permet d'y définir des éléments maximaux et minimaux. Lorsqu'on se donne une énergie, trouver la partition formée de classes de la tresse (ou de la hiérarchie) qui minimise cette énergie est un problème insoluble, de par sa complexité combinatoriale. Nous donnons les deux conditions de h-croissance et de croissance d'échelle, qui garantissent l'existence, l'unicité et la monotonie des solutions, et conduisent à un algorithme qui les détermine en deux passes de lecture des données. Le chapitre 2 reste dans le cadre précédent, mais étudie plus spécifiquement l'optimisation sous contrainte. Il débouche sur trois généralisations du modèle Lagrangien. Le chapitre 3 applique l'optimisation par treillis énergétique au cas de figure où l'énergie est introduite par une « vérité terrain », c'est à dire par un jeu de dessins manuel, que les partitions optimales doivent serrer au plus près. Enfin, le chapitre 4 passe des treillis énergétiques à ceux des courbes de Jordan dans le plan euclidien, qui définissent un modèle continu de segmentations hiérarchiques. Il permet entre autres de composer les hiérarchies avec diverses fonctions numériques
Hierarchical segmentation has been a model which both identifies with the construct of extracting a tree structured model of the image, while also interpreting it as an optimization problem of the optimal scale selection. Hierarchical processing is an emerging field of problems in computer vision and hyper-spectral image processing community, on account of its ability to structure high-dimensional data. Chapter 1 discusses two important concepts of Braids and Energetic lattices. Braids of partitions is a richer hierarchical partition model that provides multiple locally non-nested partitioning, while being globally a hierarchical partitioning of the space. The problem of optimization on hierarchies and further braids are non-tractable due the combinatorial nature of the problem. We provide conditions, of h-increasingness, scale-increasingness on the energy defined on partitions, to extract unique and monotonically ordered minimal partitions. Furthermore these conditions are found to be coherent with the Braid structure to perform constrained optimization on hierarchies, and more generally Braids. Chapter 2 demonstrates the Energetic lattice, and how it generalizes the Lagrangian formulation of the constrained optimization problem on hierarchies. Finally in Chapter 3 we apply the method of optimization using energetic lattices to the problem of extraction of segmentations from a hierarchy, that are proximal to a ground truth set. Chapter 4 we show how one moves from the energetic lattice on hierarchies and braids, to a numerical lattice of Jordan Curves which define a continous model of hierarchical segmentation. This model enables also to compose different functions and hierarchies

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Kaczmarczyk, Václav. „Optimální metody řízení energetické spotřeby budov“. Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-233629.

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This thesis discusses the operational coordination of electrical appliances and devices in a smart home. At present, the diminishing volume of fossil fuels and the increasing pressure to use renewable sources of energy necessitate the integration of such volatile sources into electrical grids. This process, however, results in higher energy costs, and the consumers are thus more willing to change their behaviour to either reduce the expenses or maintain them at a reasonable level. One of the relatively few customer-oriented options to optimise energy costs consists in the demand – response principle, which utilises external information to minimise energy consumption during high price periods. Assuming the constantly changing conditions in electrical grids, and thus also the varying demands, it is vital to provide for automatic optimisation excluding the need of user intervention. The thesis presents a method which, after being implemented into the control member, will facilitate the optimal use of appliances and devices within a smart home. As the behaviour considered optimal from the perspective of demand - response is often inconsistent with the consumer‘s requirements for comfortable use of the appliances, the proposed technique offers a compromise through enabling the consumer to select the appropriate strategy. Five universal optimisation models are designed within the thesis; these models facilitate description of common home appliances and local electricity sources. The core of the method lies in formulating and optimising a mixed integer quadratic problem (MIQP). The optimisation task yields an operational schedule for the individual appliances, and this scheme considers the energy costs, the working cycle of the appliance, the user’s demands, the system restrictions and/or other input data. Furthermore, the author extends the above-discussed general technique, enabling it to adopt robust behaviour. The method then secures the preset strategy even during a marked change of the input conditions, and its robustness is a viable precondition for the overall applicability of the technique in the real control member.

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Hošek, Jaromír. „Optimalizační modely pro energetické využití odpadu“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232178.

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The main aim of this thesis is to create a sequence of mathematical optimization models with different levels of complexity for the efficient management and waste energy utilization. Stochastic programming approach was utilized to deal with random demand and uncertain heating values. Hence, more applicable model of the waste-to-energy plant has been developed. As the next step, the model is enhanced by heating plant extension. Computations are realized for real-world data and optimal solution is found by using GAMS implementation.

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Carreras, Ubach Joan. „Mathematical programming for energetic, economic and environmental optimization of building design“. Doctoral thesis, Universitat Rovira i Virgili, 2016. http://hdl.handle.net/10803/396315.

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L’objectiu d’aquesta tesis és desenvolupar eines sistemàtiques de suport per la presa de decisions basades en mètodes matemàtics pel disseny òptim d’edificis amb mínim cost i mínim impacte ambiental. Avui en dia la societat és cada vegada més conscient de la importància que té respectar el medi ambient. Com a resultat, les autoritats i moltes empreses i consumidors estan interessats en productes econòmicament eficients però també respectuosos amb el medi ambient. En aquest context l’eficiència energètica hi juga un paper molt important. L’aïllament d’edificis és particularment interessant, ja que fa disminuir el consum d’energia i, conseqüentment, permet reduir també l’impacte ambiental. El problema general que pretenem solucionar en aquesta tesis és el disseny d’edificis ambientalment respectuosos amb el mínim cost econòmic, centrant-nos en l’optimització de l’aïllament tèrmic exterior. Per tal de demostrar les possibilitats de les nostres eines, considerem un cas d’estudi: Una casa tipus cubicle localitzada a la regió de Lleida. No obstant les nostres metodologies són suficientment generals per treballar amb diferents models d’edifici, variables de decisió i funcions objectiu. Els nostres mètodes s’han desenvolupat amb la intenció d’ajudar als agents involucrats en el disseny d’edificis.
El objetivo de esta tesis es desarrollar herramientas sistemáticas de soporte para la toma de decisiones basadas en métodos matemáticos para el diseño óptimo de edificios con mínimo coste y mínimo impacto ambiental. Hoy en día la sociedad es cada vez más consciente de la importancia que tiene respetar el medio ambiente. Como resultado, las autoridades y muchas empresas y consumidores están interesados en productos económicamente eficientes pero también respetuosos con el medio ambiente. En este contexto la eficiencia energética juega un papel muy importante. El aislamiento de edificios es particularmente interesante, ya que hace disminuir el consumo de energía y, consecuentemente, permite reducir también el impacto ambiental. El problema general que pretendemos solucionar en esta tesis es el diseño de edificios ambientalmente respetuosos con el mínimo coste económico, centrándonos en la optimización del aislamiento térmico exterior. Para demostrar las posibilidades de nuestras herramientas, consideramos un caso de estudio: Una casa tipo cubículo localizada en la región de Lleida. No obstatnte nuestras metodologías son suficientemente generales para trabajar con diferentes modelos de edificio, variables de decisión y funciones objetivo. Nuestros métodos se han desarrollado con la intención de ayudar a los agentes involucrados en el diseño de edificios.
The goal of this thesis is to provide systematic mathematical decision-support tools for the design of optimal buildings with minimum cost and minimum environmental impact. Nowadays the society is becoming more aware of the importance of being environmentally conscious. As a result, the authorities and many companies and consumers seek for products that are cost efficient but also environmentally friendly. Here energy efficiency plays an important role. Building insulation is particularly appealing, since it decreases the energy demand, thereby leading to significant environmental savings. The general problem we aim to solve in this thesis is the design of environmentally friendly buildings with the lowest possible cost focusing on the optimization of the external thermal insulation. To illustrate the capabilities of our approaches, we consider a case study: A house-like cubicle located in the Lleida region. However our methodology is general enough to work with different building models, decision variables and objective functions. Our methods are intended to assist decision-makers in the design of buildings.

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Rulíšková, Pavla. „Energetická optimalizace polyfunkčního objektu“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226835.

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Contain of master´s thesis is a energy assessment of multifunctional building in Komňátka. The theoretical part deals with the analysis of legislativ documents, current technical solution and practical application to the specified building. In the practical part thesis focus on experimental determination of the heat transfer coefficient using thermography.

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Novotný, Jan. „Energetická bilance čistíren odpadních vod“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226166.

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This masters thesis is dealing with energetic evaluation of selected municipal WWTP – WWTP Polička. First chapter, introduction explains basic terms and goals of thesis. Second chapter explains energy audit, energy audit process its scope and contents. Third chapter deals with assesing life cycle using LCA (life cycle assesment). Fourth chapter deal with energy consumption at WWTP in Czech Republic as well as in the world. Fifth chapter describes technology of WWTP Polička and its fundamental objects. Sixth chapter is assesment of WWTP Polička from hydraulic point of view and assesment of selected machinery. Further there is summation of capital and operational costs followed by capital investment return.

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Čížová, Barbora. „Energetická bilance městských čistíren odpadních vod“. Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227739.

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The research part of the diploma thesis is focused on an issue of energy consumption in sludge treatment at wastewater treatment plants divided by the number of population equivalent. The aim of the practical part is to set indicators and propose evaluative criteria concerning energy performance of urban wastewater treatment plants. The verification of proposed criteria and energetic analysis result from data of the wastewater treatment plant in Novy Jicin.

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Achilli, Isabella. „Study of a conventional Savonius rotor and optimization of a helical prototype“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15339/.

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The aim of this Master Thesis is to study numerically the aerodynamic performance of two small examples of horizontal axis domestic wind turbines: a conventional Savonius rotor, designed and built by a group of students of the Polytech of Tours (France), and its optimization, a helical Savonius rotor. In the first research project, the exploration is conducted even experimentally, testing the turbine in a wind tunnel present in the Polytech. The numerical investigation is carried out by the use of a software based on Computational Fluid Dynamics named Star CCM+, which helps studying the main fluid dynamics aspects as flow velocity, pressure and coefficients of performance. The second project consists in a helical Savonius rotor: according to the literature, the helical shape, comparing with the conventional Savonius rotor, usually shows better performances. After the 3D design on Catia, the turbine was printed using the 3D printer, on a reduced scale. CFD simulations allow to study the fluid dynamic features. Afterwards, thanks to a comparison between the two Savonius models, the performance enhancement of the new one is shown, together with a practical understanding gained of the parameters influencing aerodynamics the most. By means of the simulations, the helical rotor presents a power coefficient of 10%, which is better than the one of the conventional rotor, found at 7% for the same Tip Speed Ratio. Consequently, even the power produced by the new turbine, resulted to be better than the conventional windmill.

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Šomplák, Radovan. „Efektivní plánování investic do technologií pro energetické využití odpadů“. Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-240797.

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PhD thesis deals with the application of the simulation and optimization methods in the waste-to-energy field. An introduction describes the current state of the waste management in the EU with the focus on the Czech Republic. In the following chapter the evaluation criteria for investment intentions and the basic principles of stochastic programming are discussed. The core of the work lays in the mathematical models for the planning and operation of the process plants as well as in the mathematical models for the waste collection. The transportation problem involves all considered technological elements and therefore it is possible to simulate the waste streams between the producers and processors. This approach is demonstrated with five case studies. In the first three studies the calculations for the potential investor are presented. The main outcome of these case studies is the determination of the level of attractiveness of investment and the identification the greatest risks. Another case study is devoted to an analysis with the focus on perspective of government policies and in the last case study the issue of the waste management is analyzed in detail from the perspective of the waste producers. Developed computational tools are flexible and can be further developed and adapted based on the objectives of the specific tasks.

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Buchteile zum Thema "Energetical optimization"

Caldwell, Gary W., und Zhengyin Yan. „Isothermal Titration Calorimetry Characterization of Drug-Binding Energetics to Blood Proteins“. In Optimization in Drug Discovery, 123–49. Totowa, NJ: Humana Press, 2004. http://dx.doi.org/10.1385/1-59259-800-5:123.

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Benbekhti, Fatiha, S. Tahiraoui, H. Khouani und A. Baroudi. „Optimization and Characterization of Nanowires Semiconductor Based-Solar Cells“. In Artificial Intelligence in Renewable Energetic Systems, 409–17. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73192-6_43.

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Saib, Samia, Ahmed Gherbi und Ramazan Bayindir. „Optimization Study of Hybrid Renewable Energy System in Autonomous Site“. In Artificial Intelligence in Renewable Energetic Systems, 431–38. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73192-6_45.

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Abokersh, Mohamed Hany, Abdelghani A. Elimam und Mohamed El-Morsi. „Energetic Optimization of the Flat Plate Solar Collector“. In The Role of Exergy in Energy and the Environment, 559–71. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89845-2_39.

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Chabni, Fayçal, Rachid Taleb und Mustapha Hatti. „Application of Simulated Annealing Optimization Algorithm in Selective Harmonic Elimination Problem“. In Artificial Intelligence in Renewable Energetic Systems, 375–82. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73192-6_39.

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Aissat, A., A. Bahi Azzououm, F. Benyettou und A. Laidouci. „Optimization of Copper Indium Gallium Diselenide Thin Film Solar Cell (CIGS)“. In Artificial Intelligence in Renewable Energetic Systems, 479–85. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73192-6_50.

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Sciubba, E. „Allocation of Finite Energetic Resources Via an Exergetic Costing Method“. In Thermodynamic Optimization of Complex Energy Systems, 151–62. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4685-2_10.

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Zahr, Matthew J., und Per-Olof Persson. „Energetically Optimal Flapping Wing Motions via Adjoint-Based Optimization and High-Order Discretizations“. In Frontiers in PDE-Constrained Optimization, 259–89. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-8636-1_7.

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Binante, Vincenzo. „Crack Extension Energy Rate and Energetic Approaches in Elastic–Plastic Fracture Mechanics“. In Springer Optimization and Its Applications, 51–66. Boston, MA: Springer US, 2012. http://dx.doi.org/10.1007/978-1-4614-2435-2_3.

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Riccietti, Elisa, Stefania Bellavia und Stefano Sello. „Numerical Methods for Optimization Problems Arising in Energetic Districts“. In Progress in Industrial Mathematics at ECMI 2016, 35–42. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63082-3_4.

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Konferenzberichte zum Thema "Energetical optimization"

Trancossi, Michele, Antonio Dumas und Mauro Madonia. „Energy and Mission Optimization of an Airship by Constructal Design for Efficiency Method“. In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63448.

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It is possible to define a novel design method, which aims overcoming both traditional, the traditional Multidisciplinary Design Optimization, and to solve a fundamental issue relating to the actual formalization of the Constructal optimization method. It aims only to enhance and integrate the constructal design method and aims to produce designs, which could be, optimized both at system level and subsystem definition. This novel method is based on the second principle of thermodynamics and the constructal law. It aims to produce a design process based on two steps. The first step aims producing a theoretical design of a system to reach energetic and operative optimization. The second aims to optimize the subcomponents of the system according the bottom up approach defined by constructal design optimization. A third step relating to the readiness against technology analysis is necessary to develop an effective industrial design. This method has named Constructal Design for Efficiency. In this paper the authors, starting from the experience produced by the MAAT EU FP7, about the design of a cruiser-feeder and energy self sufficient airship for transport has produced the optimization of a medium altitude airship for transport, focused on the optimization of flying vehicle architecture to minimize by design the energy consumption during flight. The produced results allow defining a novel airship concept, which optimizes the airship shape to reach three fundamental energetic goals: energy consumption minimization; photovoltaic energy production maximization; definition of the conditions for energetically self-sufficient flight. The defined architecture can maximize the operative possibilities realizing an airship, which can ensure a point-to-point ground, based logistic models without any airport infrastructure with potential breakthrough impacts because of a better integration with any other terrestrial, maritime and aerial transport mode. Notwithstanding the use of hydrogen, it ensures an increased perception of safety by potential customers. It presents a safer ballooning architecture, without internal air ballonets, a cabin not directly attached to the bottom part of the balloon, which can be detached and piloted safely on the ground in case of serious accident during flight.

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Zampilli, Mauro, Gianni Bidini, Paolo Laranci und Francesco Fantozzi. „Externally Fired Gas Turbine: Layout Optimization for Micro CHP Generation With Residual Biomass Firing“. In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57969.

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The Externally Fired Gas Turbine (EFGT) systems allows the use of unrefined fuels, such as biomass and waste in cogeneration arrangement for adequate efficiencies and high reliability, with respect to internal combustion systems based on gasification. The technology has some technological barriers related to thermal and mechanical resistance of the high temperature heat exchanger (HTHE), which is subject to fouling and corrosion phenomena of the parts exposed to flue gas and fly ash deposits. In this paper an investigation aimed to optimize a 100 kWel, Externally Fired micro Gas Turbine (EFmGT) for combined heat and power generation is presented and discussed. A techno-economic analysis was performed for different plant layouts which are energetically analysed for the case of complete external combustion and co-firing with natural gas, comparing power production, electrical and global efficiency. Each layout was studied by means of mass and energy balance. An economic analysis is also provided, focused on a comparison of initial investment, NPV and IRR. In the economic analysis the best feed in tariff for energetic valorisation of residual biomass was used to calculate the revenue of electric energy generated from biomass.

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Elweddad, Mohamed, Muhammet Tahir Guneser und Ziyodulla Yusupov. „Energy management and optimization of microgrid system using particle swarm optimization algorithm“. In 2ND INTERNATIONAL CONFERENCE ON ENERGETICS, CIVIL AND AGRICULTURAL ENGINEERING 2021 (ICECAE 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0113501.

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Faes, Willem, Jarissa Maselyne, Michel De Paepe und Steven Lecompte. „Modelling the energetic performance of a pig stable“. In 34th International Conference on Efficiency, Cost, Optimization, Simulation and Environment Impact of Energy Systems. Tokyo, Japan: ECOS 2021 Program Organizers, 2022. http://dx.doi.org/10.52202/062738-0081.

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Airimitoaie, T. B., D. Popescu und C. Dimon. „Advanced control and optimization for thermo-energetic installations“. In 2009 5th International Symposium on Applied Computational Intelligence and Informatics (SACI). IEEE, 2009. http://dx.doi.org/10.1109/saci.2009.5136217.

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Nancy, Mubina, und S. Elizabeth Amudhini Stephen. „Particle swarm optimization (PSO), crow search algorithm (CSA), charged system search algorithm (CSSA) and big-bang big crunch optimization (B-BBCO) - Optimization methods – A critical review“. In 2ND INTERNATIONAL CONFERENCE ON ENERGETICS, CIVIL AND AGRICULTURAL ENGINEERING 2021 (ICECAE 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0117138.

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Littlefield, David L., Kenneth C. Walls und David E. Lambert. „Development of Reactive Flow Models for Energetic Materials“. In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-78098.

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In order to make the process of material model development more systematic for energetic materials, we have developed a procedure that makes use of nonlinear optimization to derive optimal values of parameters in the material models. A framework has been developed that makes use of the optimization software package DAKOTA driving the hydrocode CTH (both CTH and DAKOTA are developed and maintained at Sandia National Laboratories). CTH was used to model a set of characterization experiments that were used as the basis for the calibration of a particular model; for example, the cylinder test was used to calibrate the JWL equation of state, and the wedge test for the HVRB reactive burn model. As a verification test of the framework, we have determined material model constants for TNT and compared them to values published in the literature.

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Rejula, Mercy J., und S. Elizabeth Amudhini Stephen. „Weight minimization of a hollow shaft using non-traditional optimization“. In 2ND INTERNATIONAL CONFERENCE ON ENERGETICS, CIVIL AND AGRICULTURAL ENGINEERING 2021 (ICECAE 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0115550.

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Wilfred, C. Bazil, S. Elizabeth Amudhini Stephen und K. Rebecca Jebaseeli Edna. „Optimization of tropical tamarillo extract as a complete dietary supplement“. In 2ND INTERNATIONAL CONFERENCE ON ENERGETICS, CIVIL AND AGRICULTURAL ENGINEERING 2021 (ICECAE 2021). AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0115263.

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Trancossi, Michele, Antonio Dumas und Mauro Madonia. „Morfoplane: Energetic Analysis of a Novel Green Aerial Vehicle Concept“. In ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18166.

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Costs of Helium are increasing more rapidly than provided by economic analysts because of the high demanded if compared with actual production possibilities. These economic disadvantages are slowing many airship projects, because of the necessary costs that need to be faced for initial inflation. They are forcing the definition of novel airship architectures which could use hydrogen as buoyant gas with a higher level of safety than in the past. This paper starts from those economic issues to define a general model based on the variable volume airship defined in the MAAT cruiser-feeder airship project. It defines a future hydrogen airships concept which could avoid the disasters of the past and maximize the safety of people and goods. The model has been compared with the results of an optimization of the very general airship conceptual design based on Constructal theory. The goal of the optimization has been defined in terms of maximization of solar energy caption possibility, minimization of frontal area, volume, and energy consumption at a predefined operative altitude. A surprising accordance of the proposed model with the results of the Constructal optimization results has been obtained. A comparison with a traditional model of airship has been performed and results have been validated by CFD simulation at different altitudes.

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