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Dissertations / Theses on the topic 'Energy Packet'

Author: Grafiati

Published: 14 March 2023

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1

Nilsson, Samuel, and Joakim Eriksson. "Estimating Application Energy Consumption Through Packet Trace Analysis." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110348.

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The advancement of mobile clients and applications makes it possible for people to always stayconnected, sending and receiving data constantly. The nature of the 3G technology widelyused, however, causes a high battery drain in cellular phones and because of that a lot of toolsfor measuring mobile phones energy consumption has been developed. In this report we lookinto the trace-driven tool EnergyBox and find out how we can use it to estimate the energyconsumption of 3G transmissions for an application we’ve developed ourselves. We beginwith identifying the types of traffic our application gen

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2

Sanjuan, Joseba. "3G Energy-Efficient Packet Handling Kernel Module for Android." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-84507.

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The use of mobile devices is increasing due to the constant development of more advanced and appealing applications and computing features. However, these new features are very power hungry leading to short battery lifetimes. Research shows that a major reason for fast battery depletion is the excessive and inefficient use of the wireless interfaces. This thesis studies how we can attempt to increase the battery lifetime of the devices without having to sacrifice the usage of these advanced features in some applications. The thesis focuses on adapting the traffic pattern characteristics of mob

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Oto, Mert Can. "Energy-efficient Packet Size Optimization For Cognitive Radio Sensor Networks." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613040/index.pdf.

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Cognitive Radio (CR) has emerged as the key technology to enable dynamic spectrum access. Capabilities of CR can meet the unique requirements of many wireless networks. Hence, Cognitive Radio Sensor Networks (CRSN) is introduced as a promising solution to address the unique challenges of Wireless Sensor Networks (WSN) which have been widely used for reliable event detection for many applications. However, there exist many open research issues for the realization of CRSN. Among others, determination of optimal packet size for CRSN is one of the most fundamental problems to be addressed. The exi

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Mobin, Iftekharul. "Energy efficient packet size optimization for wireless ad hoc networks." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8769.

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Energy efficiency is crucial for ad hoc networks because of limited energy stored in the battery. Recharging the nodes frequently is sometimes not possible. Therefore, proper energy utilization is paramount. One possible solution of increasing energy efficiency is to optimize the transmitted packet size. But, we claim that only optimal packet size can not boost the energy efficiency in the noisy channel due to high packet loss rate and overhead. Hence, to reduce the overhead size and packet loss, compression and Forward Error Correction (FEC) code are used as remedy. However, every method has

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5

Kassab, Hisham Ibrahim. "low-energy mobile packet radio networks : routing, scheduling, and architecture." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9121.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2000.<br>Includes bibliographical references (leaves 171-176).<br>Packet Radio Networks (PRNETs), which are also called ad-hoc networks, have the capability of fast (and ad-hoc) deployment and set-up, and therefore potentially have several useful civilian and military applications. Building low-energy PRNETs is an important design goal, because the communication devices are typically powered by batteries, and therefore are useless when the batteries are depleted. We choose to l

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Reza, C. M. F. S. "Design of Energy Mixer and Router for DC Power Packet Distribution System." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/20137.

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Energy internet (EI) is introduced recently aiming to improve power system reliability, security and efficiency through advanced information and power electronic technologies. A power packet distribution system (PPDS) is a promising candidate for the EI implementation, as it transfers information alongside the distribution of electric power. The PPDS can be realized for both DC and AC power distribution. This thesis has made four key contributions to the DC-PPDS: (1) A revised PP structure is proposed, which has a reduced footer bit and hence reduction in power switching losses. A routing sche

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7

Morfopoulou, Christina. "Queuing analysis and optimization techniques for energy efficiency in packet networks." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/11681.

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Energy efficiency in all aspects of human life has become a major concern, due to its significant environmental impact as well as its economic importance. Information and Communication Technology (ICT) plays a dual role in this; not only does it constitute a major consumer itself (estimated 2-10% of the global consumption), but is also expected to enable global energy efficiency through new technologies tightly dependent on networks (smart grid, smart homes, cloud computing etc.). To this purpose, this work studies the problem of energy efficiency in wired networks. As this subject has recentl

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8

Eriksson, Daniel, and Axel Persson. "Energy Optimization of Scheduling and Packet Loss in Wireless Sensor Networks." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214699.

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We study the data aggregation of Wireless SensorNetworks (WSN). This is done by considering two problemformulations. The problems examine two different parts of thenetworks and their impact on its energy consumption. The firstproblem looks at the impact of packet loss and the secondproblem on the impact of network scheduling. The reason behindthis is that WSN usually operate on battery power and may beplaced in locations where they are hard to replace. Thus if itis possible to reduce the energy consumption of a WSN, thetotal lifespan of it will be increased. This led to the formulationof a NP-

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Sachdeva, Gitanjali. "Measuring and Optimizing Energy Efficiency in Internet Communication : Implementing a Packet-Level Energy Model for Content Delivery Networks." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for telematikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22693.

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Green ICT (Information and Communication Technology) aims at reducing the environmental impacts of ICT operations, maximizing energy efficiency and promoting recyclability. The ICT industry is resource intensive with rapidly increasing demands for more infrastructure and power. It is heavily dependent on full-time network connectivity. Therefore, networks play a crucial role in the overall green ICT initiatives. Various research efforts are being made by network equipment manufacturers as well as researchers to promote energy efficiency in the networks. The target of this master thesis is to d

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10

Nawata, Shinya. "Design of Electrical Energy Network Based on Power Packetization." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225598.

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11

Baek, Seong Cheol. "Dynamical Analysis and Decentralized Control of Power Packet Network." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263664.

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Prevedi, Andrea. "Energy Communities in Italy." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21973/.

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Citizens are expected to have a great role in the future global energy transition toward a low-carbon economy and climate neutrality. The creation of energy communities can empower citizens, who become prosumers, providing flexibility and ancillary services, reducing losses and grid investment deferral. It also brings environmental and social benefits, activating virtuous circles in the local economy. The purpose of this work is to analyze the current regulatory framework energy community; a deeper analysis is performed on renewable energy community whose regulation has been already transpose

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Mostowfi, Mehrgan. "Packet Coalescing and Server Substitution for Energy-Proportional Operation of Network Links and Data Servers." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4732.

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Electricity generation for Information and Communications Technology (ICT) contributes over 2% of the human-generated CO2 to the atmosphere. Energy costs are rapidly becoming the major operational expense for ICT and may soon dwarf capital expenses as software and hardware continue to drop in price. In this dissertation, three new approaches to achieving energy-proportional operation of network links and data servers are explored. Ethernet is the dominant wireline communications technology for Internet connectivity. IEEE 802.3az Energy Efficient Ethernet (EEE) describes a Low Power Idle (LPI)

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Erkal, Hakan. "Optimization Of Energy Harvesting Wireless Communication Systems." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613937/index.pdf.

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In an energy harvesting communication system, energy is derived from outside sources and becomes partially available at different points in time. The constraints induced by this property on energy consumption plays an active role in the design of efficient communication systems. This thesis focuses on the optimal design of transmission and networking schemes for energy harvesting wireless communication systems. In particular, an energy harvesting transmitter broadcasting data to two receivers in an AWGN broadcast channel assuming that energy harvests and data arrivals occur at known instants i

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Ajibesin, Adeyemi Abel. "Novel approaches to performance evaluation and benchmarking for energy-efficient multicast: empirical study of coded packet wireless networks." Doctoral thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20323.

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With the advancement of communication networks, a great number of multicast applications such as multimedia, video and audio communications have emerged. As a result, energy efficient multicast in wireless networks is becoming increasingly important in the field of Information and Communications Technology (ICT). According to the study by Gartner and Environmental Protection Agency (EPA) report presented to United State Congress in 2007,energy consumption of ICT nodes accounts for 3% of the worldwide energy supply and is responsible for 2% of the global Carbon dioxide (CO2) emission. However,

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Ozcelik, Fatih Mehmet. "Optimal And Implementable Transmission Schemes For Energy Harvesting Networks." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614636/index.pdf.

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Progress in energy harvesting technology and the increasing need for the energy efficient and environmentally friendly applications have called for reconsideration of communication systems. This reconsideration results in new problem formulations regarding the recent developments on energy harvesting systems. Recently, optimal strategies for various types of energy harvesting networks have been developed based on different harvesting models. This thesis reports the results of our research to develop the optimal scheduling structures on an energy harvesting broadcast and fading channels, and to

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Phan, V. V. (Vinh V. ). "Smart packet access and call admission control for efficient resource management in advanced wireless networks." Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514276779.

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Abstract Efficient management of rather limited resources, including radio spectrum and mobile-terminal battery power, has been the fundamental design challenge of wireless networks and one of the most widespread research problems over the years. MAC (Medium Access Control) for packet access and CAC (Call Admission Control) for connection-oriented service domains are commonly used as effective tools to manage radio resources, capacity and performance of wireless networks while providing adequate QoS (Quality of Service) to mobile users. Hence, analysis and synthesis of efficient MAC and CAC sc

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Bacinoglu, Tan Baran. "Finite-horizon Online Energy-efficient Transmissionscheduling Schemes Forcommunication Links." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615468/index.pdf.

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The proliferation of embedded systems, mobile devices, wireless sensor applications and in- creasing global demand for energy directed research attention toward self-sustainable and environmentally friendly systems. In the field of communications, this new trend pointed out the need for study of energy constrained communication and networking. Particularly, in the literature, energy efficient transmission schemes have been well studied for various cases. However, fundamental results have been obtained mostly for offline problems which are not applicable to practical implementations. In contras

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Guegan, Loic. "Scalable end-to-end models for the time and energy performance of Fog infrastructures." Thesis, Rennes, École normale supérieure, 2021. http://www.theses.fr/2021ENSR0025.

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L'informatique géo-distribuée (Fog Computing) désigne la migration des ressources de calcul et de stockage du nuage (Cloud) vers les utilisateurs. Cette migration des ressources permet de réduire la latence des terminaux utilisateurs afin de répondre à l'évolution des usages de l'Internet. En parallèle, le nombre de terminaux ne cesse de croître avec le développement de l’Internet des objets. Cette croissance des infrastructures et du nombre d’objets connectés à Internet entraîne une hausse de la consommation électrique globale liée au numérique.Cependant, cette consommation est très distribué

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Suciu, Ioana. "Energy aware optimization for low power radio technologies." Doctoral thesis, Universitat Politècnica de Catalunya, 2020. http://hdl.handle.net/10803/668889.

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The explosive growth of IoT is pushing the market towards cheap, very low power devices with a strong focus on miniaturization, for applications such as in-body sensors, personal health monitoring and microrobots. Proposing procedures for energy efficiency in IoT is a difficult task, as it is a rapidly growing market comprised of many and very diverse product categories using technologies that are not stable, evolving at a high pace. The research in this field proposes solutions that go from physical layer optimization up to the network layer, and the sensor network designer has to select the

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Mostowfi, Mehrgan. "Improving the Energy Efficiency of IEEE 802.3az EEE and Periodically Paused Switched Ethernet." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3623.

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It is estimated that networked devices consumed about 150 TWh of electricity in 2006 in the U.S. which has cost around $15 billion and contributed about 225 billion lbs of CO 2 to greenhouse gas emissions. About 13.5% of this energy is consumed by network equipment such as switches and routers. This thesis addresses the energy consumption of Ethernet, and designs and evaluates improvements on existing methods to reduce the energy consumption of Ethernet links and switches. Energy Efficient Ethernet (EEE) is an emerging IEEE 802.3 standard which allows Ethernet links to sleep when idle. In thi

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Antepli, Mehmet Akif. "A Study On Certain Theoretical And Practical Problems In Wireless Networks." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612603/index.pdf.

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The aim of the thesis is to investigate the design of efficient wireless networks through practical as well as theoretical considerations. We constructed a wireless sensor network (WSN) testbed with battery operated nodes capable of RF communication. The system is a centralized tree-based WSN to study challenges of target modeling, detection, and localization. The testbed employed magnetic sensors, on which relatively few results have been reported in the literature. A ferrous test target is modeled as magnetic dipole by validating experimentally. The problem of sensor sensitivity variation i

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23

Haneberg-Diggs, Dominique Miguel. "Seismic attributes of the Clinton interval reservoir in the Dominion East Ohio Gabor gas storage field near North Canton, Ohio." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1418759184.

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Samoud, Wiem. "Analyse de performance d'un commutateur de paquets hybride opto-électronique." Thesis, Paris, ENST, 2016. http://www.theses.fr/2016ENST0058/document.

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La fibre optique demeure le support de transmission le plus utilisé, portant le trafic à une énergie par bit relativement faible. Cependant, à cause de l’absence de mémoire toutoptique pratique, la commutation de paquets est toujours exécutée électriquement. Les conversions Optiques Électriques Optiques (O-E-O) nécessaires font de la commutation l’un des domaines les plus consommateurs d’énergie. Ce problème est de plus en plus important spécialement avec la croissance exponentielle du trafic dans les réseaux optiques. Un défi majeur à prendre en considération dans la conception de futurs rése

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Chibumba, Aubrey Muyeke. "Characterisation of thermal coefficients in packed beds." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303543.

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Hall, Stephen. "Optimisation of biogas production from percolating packed bed anaerobic digesters." Thesis, University of South Wales, 1986. https://pure.southwales.ac.uk/en/studentthesis/optimisation-of-biogas-production-from-percolating-packed-bed-anaerobic-digesters(6825c6bf-4ee7-439e-832a-28aa8b7cd4d3).html.

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Percolating packed bed digesters were operated successfully in a batch mode using a wheat straw - dairy manure substrate of between 21 and 27% total solids. The vessels used had a nominal 10 1 volume and were constructed of perspex. Temperatures of 25-35°C were used, recirculation rates of 0-15 litres.hr-1 (the digesters having a diameter of 0.18 metres thus corresponding to superficial flow rates of between O and 0.382 l/m2 /hr), solid : liquid ratios of 1:1 to 4:1 and bed heights of 0.26 to 2.05 metres. The optima found were a temperature of 35°C, recirculation rate of 3 litres.hr1-, a solid

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Abou-Ziyan, H. Z. Z. "Heat and momentum transfer in porous material used for thermal energy storage." Thesis, University of Leeds, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233826.

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Edwards, Jacob N. "Thermal energy storage for nuclear power applications." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/36238.

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Master of Science<br>Department of Mechanical and Nuclear Engineering<br>Hitesh Bindra<br>Storing excess thermal energy in a storage media that can later be extracted during peak-load times is one of the better economical options for nuclear power in future. Thermal energy storage integration with light water-cooled and advanced nuclear power plants is analyzed to assess technical feasibility of different storage media options. Various choices are considered in this study; molten salts, synthetic heat transfer fluids, and packed beds of solid rocks or ceramics. In-depth quantitative assessment

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Maidadi, Mohaman Bello. "Packed-bed rock thermal energy storage for concetrated solar power: enhancement of storage time and system efficiency." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020914.

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Solar thermal energy harvesting is a promising solution to offset the electricity demands of a growing population. The use of the technology is however still limited and this can most likely be attributed to the capital cost and also the intermittent nature of solar energy which requires incorporation of a storage system. To make the technology more attractive and effective, cheap means of harvesting solar energy and the development of efficient and inexpensive thermal energy storage devices will improve the performance of solar energy systems and the widespread use of solar energy. Heat stora

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Allen, Kenneth Guy. "Performance characteristics of packed bed thermal energy storage for solar thermal power plants." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4329.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Solar energy is by far the greatest energy resource available to generate power. One of the difficulties of using solar energy is that it is not available 24 hours per day - some form of storage is required if electricity generation at night or during cloudy periods is necessary. If a combined cycle power plant is used to obtain higher efficiencies, and reduce the cost of electricity, storage will allow the secondary cycle to operate independently of the primary cycle. This stu

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Bang, Jang Young. "Generalized uncertainty principle and Gaussian wave packets in discrete quantum phase space." [Bloomington, Ind.] : Indiana University, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3380062.

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Thesis (Ph.D.)--Indiana University, Dept. of Physics, 2009.<br>Title from PDF t.p. (viewed on Jul 19, 2010). Source: Dissertation Abstracts International, Volume: 70-12, Section: B, page: 7630. Adviser: Micheal S. Berger.

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Yeboah, Siegfried Kwame. "An integrated packed bed-oscillating heat pipe system for energy efficient isothermal adsorption processes." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/48342/.

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Energy use in buildings accounts for a large portion of global and regional energy demand and energy-related CO2 emissions. To steer the world towards a low carbon future, the development of new and more efficient technologies is required. In hot and humid climates, the high latent heat loads results in uncomfortable and unhealthy indoor environments, accounting for 30% to 50% of standard air conditioning energy requirements. Physical adsorption of water vapour on solid desiccants is found to offer an energy efficient alternative to conventional dehumidification process using standard air cond

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Grüner, Barbara, Martin Schlesinger, Philipp Heister, Walter T. Strunz, Frank Stienkemeier, and Marcel Mudrich. "Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-138750.

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The vibrational wave-packet dynamics of diatomic rubidium molecules (Rb2) in triplet states formed on the surface of superfluid helium nanodroplets is investigated both experimentally and theoretically. Detailed comparison of experimental femtosecond pump–probe spectra with dissipative quantum dynamics simulations reveals that vibrational relaxation is the main source of dephasing. The rate constant for vibrational relaxation in the first excited triplet state 13Σ+g is found to be constant γ ≈ 0.5 ns−1 for the lowest vibrational levels v [less, similar] 15 and to increase sharply when exciting

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Krist, Thomas. "Optimalizace zásobníku tepla typu "packed bed"." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417062.

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Tato diplomová práce se zabývá tématem výměny tepla v zásobníku tepla typu ”packed bed”. Cílem je popsat přenos tepla v zásobníku tepla obsahující kamínky malých průměrů, skrz který proudí horký vzduch. Toto je modelováno v prostředí MATLAB. Na začátku je krátký úvod do problematiky zahrnující ukládání tepla a jeho možné využití. Dále je uveden krátký přehled o základech přenosu tepla, typech přenosu tepla a termofyzikální vlastnosti systému vzduch-kámen. Ve třetí kapitole je představen zásobník tepla typu ”packed bed” a rozličné modely a dané podmínky jsou vysvětleny. Další kapitola se zabývá

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Rohrdanz, Mary A. "Intermolecular communication via lattice phonons, probed by ultrafast spectroscopy /." view abstract or download file of text, 2005. http://wwwlib.umi.com/cr/uoregon/fullcit?p3190543.

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Thesis (Ph. D.)--University of Oregon, 2005.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 79-80). Also available for download via the World Wide Web; free to University of Oregon users.

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Gamble, Stephanie Nicole. "Conical Intersections and Avoided Crossings of Electronic Energy Levels." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/101899.

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We study the unique phenomena which occur in certain systems characterized by the crossing or avoided crossing of two electronic eigenvalues. First, an example problem will be investigated for a given Hamiltonian resulting in a codimension 1 crossing by implementing results by Hagedorn from 1994. Then we perturb the Hamiltonian to study the system for the corresponding avoided crossing by implementing results by Hagedorn and Joye from 1998. The results from these demonstrate the behavior which occurs at a codimension 1 crossing and avoided crossing and illustrates the differences. These soluti

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Grüner, Barbara, Martin Schlesinger, Philipp Heister, Walter T. Strunz, Frank Stienkemeier, and Marcel Mudrich. "Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets." Royal Society of Chemistry, 2011. https://tud.qucosa.de/id/qucosa%3A27778.

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The vibrational wave-packet dynamics of diatomic rubidium molecules (Rb2) in triplet states formed on the surface of superfluid helium nanodroplets is investigated both experimentally and theoretically. Detailed comparison of experimental femtosecond pump–probe spectra with dissipative quantum dynamics simulations reveals that vibrational relaxation is the main source of dephasing. The rate constant for vibrational relaxation in the first excited triplet state 13Σ+g is found to be constant γ ≈ 0.5 ns−1 for the lowest vibrational levels v [less, similar] 15 and to increase sharply when exciting

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Al-Chalaby, K. A. J. "Heat transfer in a packed bed using a fluid near its critical point for solar energy applications." Thesis, University of Sussex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377058.

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Alam, Tanvir E. "Experimental Investigation of Encapsulated Phase Change Materials for Thermal Energy Storage." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5632.

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Thermal energy storage (TES) is one of the most attractive and cost effective solutions to the intermittent generation systems like solar, wind and other renewable sources, compared to alternatives. It creates a bridge between the power supply and demand during peak hours or at times of emergency to ensure the continuous supply of energy. Among all the TES systems, latent heat thermal energy storage (LHTES) draws lots of interests as it has high energy density and can store or retrieve energy isothermally. Two major technical challenges associated with the LHTES are low thermal conductivity of

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Rashidian, Babak. "Deflector effects in fixed bed (biomass) combustors and non-combusting packed beds." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2016. https://ro.ecu.edu.au/theses/1937.

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Combustion can be used to thermally process biomass fuels and yield both heat and power in a sustainable manner. At present, direct combustion of solid biomass is the primary approach for generating electricity and heat when these fuels are used at a commercial scale. Deflectors have been used in the freeboard section of industrial combustors to reduce radiant heat loss through flue gases and for particle emissions abatement. Freeboard deflectors can also influence emissions and freeboard temperature distributions by changing the flow dynamics. Despite much research into laboratory scale bioma

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Nyman, Johan, and Amy Rankka. "Energy Efficient, Electric-Hydraulic Power Pack." Thesis, Linköpings universitet, Fordonssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119477.

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Along with increased oil prices and rising environmental issues, a demand for alternatives to combustion engine driven hydraulic applications has risen. In the field of mobile hydraulics, the hydraulic applications have traditionally been driven by the combustion engine of the vehicle on which they are mounted. By instead using a battery driven power pack the hydraulic application is able to operate without the engine running, saving fuel costs and reducing sound levels. In this thesis, the concept of using an electric-hydraulic power pack with a variable-speed electric motor and a fixed-displ

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Prenzel, Marco [Verfasser]. "Scale-up of horizontal packed bed thermal energy storage units: An in-depth experimental and numerical investigation / Marco Prenzel." Düren : Shaker, 2021. http://d-nb.info/1233548050/34.

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Diego, García Ramón Ignacio. "Análisis wavelet aplicado a la medida de armónicos, interarmónicos y subarmónicos en redes de distribución de energía eléctrica." Doctoral thesis, Universidad de Cantabria, 2006. http://hdl.handle.net/10803/10636.

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El análisis de Fourier es el método fundamental para la medida de armónicos e interarmónicos en señales eléctricas y es el principio de análisis que establece la International Electrotechnical Commission para los instrumentos de medida. Con el objetivo de superar las limitaciones que lo hacen poco efectivo en determinadas condiciones se han propuesto otras técnicas de análisis como las wavelets. En esta tesis doctoral se explora esta alternativa en el campo de la calidad del suministro de energía eléctrica.Como aportación principal se presenta un nuevo método de medida de armónicos e interarmó

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Bäckebo, Markus. "The influence of particle size distribution on bio-coal gasification rate as related to packed beds of particles." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79084.

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This thesis is a part of a collaboration between Höganäs AB and Luleå University of Technology, aiming at replacing fossil process coal with bio-coal in their sponge iron process. The difference in gasification reactivity, i.e. reaction rate, between fossil coals and bio-coals is the major challenge in the endeavor to decrease the climate impact of the existing process. The goal of this thesis is to develop a model of reaction rate for bio-coals in relation to particle size distribution. Different particle size distributions were combined and tested to see how that affects the effective reacti

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Congiu, Brian Alexander. "Conversion of Carbon Dioxide and Hydrogen into Methane in Bench-scale Microcosms and Packed Column Reactors." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1292783980.

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Thomson, Sean Richard. "Methane Production by a Packed-Bed Anaerobic Digester Fed Dairy Barn Flush Water." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1329.

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Packed-bed digesters are an alternative to covered lagoon digesters for methane production and anaerobic treatment of dilute wastewaters such as dairy barn flush water. The physical media of packed-beds retain biofilms, often allowing increased treatment rates. Previous studies have evaluated several types of media for digestion of dilute wastewaters, but cost and media fouling have setback commercial development. A major operational cost has been effluent recirculation pumping. In the present effort, a novel approach to anaerobic digestion of flush dairy water was developed at pilot-scale:

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Trahan, Jamie. "A Technical and Economic Comparative Analysis of Sensible and Latent Heat Packed Bed Storage Systems for Concentrating Solar Thermal Power Plants." Scholar Commons, 2015. https://scholarcommons.usf.edu/etd/5598.

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Though economically favorable when compared to other renewable energy storage technologies, thermal energy storage systems for concentrating solar thermal power (CSP) plants require additional cost reduction measures to help transition CSP plants to the point of grid-parity. Thermocline packed bed storage is regarded as one potential low cost solution due to the single tank requirement and low cost storage media. Thus sensible heat storage (SHS) and latent heat storage (LHS) packed bed systems, which are two thermocline varieties, are frequently investigated. LHS systems can be further classif

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Rocco, Arthur Betti. "Processo decisório da União Europeia : um estudo sobre o Pacote Clima-Energia 2020." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/24230.

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Dissertação (mestrado)—Universidade de Brasília, Instituto de Relações Internacionais, Programa de Pós-Graduação em Relações Internacionais, 2017.<br>Submitted by Raquel Almeida (raquel.df13@gmail.com) on 2017-06-21T19:08:13Z No. of bitstreams: 1 2017_ArthurBettiRocco.pdf: 2452335 bytes, checksum: 5ec0124eea5fadc7b997a0b19f88ed8f (MD5)<br>Approved for entry into archive by Raquel Viana (raquelviana@bce.unb.br) on 2017-08-22T19:00:41Z (GMT) No. of bitstreams: 1 2017_ArthurBettiRocco.pdf: 2452335 bytes, checksum: 5ec0124eea5fadc7b997a0b19f88ed8f (MD5)<br>Made available in DSpace on 2017-08-22T19

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Thiem, Stefanie. "Electronic and Photonic Properties of Metallic-Mean Quasiperiodic Systems." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-83831.

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Understanding the connection of the atomic structure and the physical properties of materials remains one of the elementary questions of condensed-matter physics. One research line in this quest started with the discovery of quasicrystals by Shechtman et al. in 1982. It soon became clear that these materials with their 5-, 8-, 10- or 12-fold rotational symmetries, which are forbidden according to classical crystallography, can be described in terms of mathematical models for nonperiodic tilings of a plane proposed by Penrose and Ammann in the 1970s. Due to the missing translational symmetry of

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Falola, Bamidele Daniel. "TRANSITION METAL COATINGS FOR ENERGY CONVERSION AND STORAGE; ELECTROCHEMICAL AND HIGH TEMPERATURE APPLICATIONS." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/dissertations/1354.

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Energy storage provides sustainability when coupled with renewable but intermittent energy sources such as solar, wave and wind power, and electrochemical supercapacitors represent a new storage technology with high power and energy density. For inclusion in supercapacitors, transition metal oxide and sulfide electrodes such as RuO2, IrO2, TiS2, and MoS2 exhibit rapid faradaic electron–transfer reactions combined with low resistance. The pseudocapacitance of RuO2 is about 720 F/g, and is 100 times greater than double-layer capacitance of activated carbon electrodes. Due to the two-dimensional

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