Relevant bibliographies by topics / Energy conservation / Dissertations / Theses
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Dissertations / Theses on the topic 'Energy conservation'

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Published: 4 June 2021
Last updated: 1 August 2024

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1

Nyathi, Nongezile Sibhekile. "Water conservation through energy conservation." Diss., Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-08282007-124154.

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Thesis (M.Eng.)(Chemical Engineering)--University of Pretoria, 2006.
Accompanied by a CD-ROM: Appendix B. Cooling tower model results. Includes bibliographical references. Available on the Internet via the World Wide Web.
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2

Li, Ka-ming, and 李家明. "Energy audit for building energy conservation." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31253192.

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Li, Ka-ming. "Energy audit for building energy conservation /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B14723244.

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4

Todd, Stephen. "Conservatories and energy conservation." Thesis, University of Salford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258551.

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5

Zou, Fan. "Energy Saving Curtain : ENERGY INVENTORY AND CONSERVATION POSSIBILITIES." Thesis, University of Gävle, Department of Technology and Built Environment, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-398.

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This paper presents the energy saving curtains, in order to make the

consumers be more aware of the energy efficiency of the energy saving

curtains, the paper gave related analysis and conclusions.

The work was performed by using the Parasol Program, developed by Lunds University, Sweden. The Program is used for quantifying the influence of window size, glass type, textile type, wall thermal insulation and sun shading on annual energy use and indoor thermal comfort. The results which are obtained from the calculations are applicable to similar climatic and environment conditions. Calculations were performed to investigate the potential for using sunshade devices to reduce annual energy demand for cooling and heating. Different materials and dimensions of the energy saving

curtain are used as variables in the analysis. The results indicated that for the current climatic conditions and other related factors, the total reduction rate of the annual energy consumption of office used buildings in Stockholm is estimated generally 20% -30% lower comparing to those buildings without energy saving curtain system. That means at least 20% of energy cost can be saved by the energy saving curtain system.

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6

Patchett, Roy Anthony. "Energy conservation in Methylophilus methylotrophus." Thesis, University of Leicester, 1986. http://hdl.handle.net/2381/35123.

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7

Dorling, John. "Industrial Energy Analysis and Conservation." Thesis, Cranfield University, 1989. http://hdl.handle.net/1826/4189.

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This work is concerned with the analysis of industrial energy use for the purposes of reducing that use to a minimum within the constraints imposed by the existing plant. The work is divided into two parts. Firstly, a general analysis of the energy used in an industrial plant is made for the year 1986. Based on monthly records of energy consumption and environmental parameters, it is primarily intended to heighten management awareness of energy flows and the relative contributions from each energy type towards the total annual consumption and cost. It is performed using a suite of interactive linked computer programs and the data is reduced to a graphical form for presentation in a report. The analysis is a first approximation, assuming steady state conditions with many parameters time and space averaged, but is justified by the findings that monetary savings approaching 5% of the annual energy bill could be made with changes to operational procedures alone. As a result of this work, it was revealed that the boiler-house supplying the majority of the plant with high pressure hot water for process and space heating requirements used more than half of the total annual energy requirements and that potential energy savings were likely. Secondly, a detailed analysis of the energy used by the boiler-house is- carried out. A real time monitoring and targeting system which records and displays boiler, environmental and plant parameters is developed and installed. Data gathered over a period of six months enables (i) specific cases of energy wastage resulting from operational procedures to be identified and (ii) trends of performance indicating poor energy efficiency to be traced. The system developed may be used to provide the information necessary to enable improved control. A general result which may be inferred from this work would be that the combined approaches of a topdown general analysis and a bottom-up detailed analysis of energy use can provide significant opportunities for energy conservation resulting solely from the improved operation of large energy consuming plant. The work was performed at a major manufacturing plant in the U. K. with an annual energy consumption of the order of 600 gigawatt-hours and an annual energy bill of the order of E10 million.
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8

Kadam, Rohit. "Net Zero Building Energy Conservation." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/825.

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AN ABSTRACT OF THE THESIS OF Rohit Kadam, for the Master of Science degree in MECHANICAL ENGINEERING, presented on DECEMBER 2, 2011, at Southern Illinois University Carbondale. (Do not use abbreviations.) TITLE: NET ZERO BUILIND ENERGY CONSERVATION MAJOR PROFESSOR: Dr. Emmanuel Nsofor This research deals with energy studies performed as part of a net-zero energy study for buildings. Measured data of actual energy utilization by a building for a continuous period of 33 months was collected and studied. The peak design day on which the building consumes maximum energy was found. The averages of the energy consumption for the peak month were determined. The DOE EnergyPlus software was used to simulate the energy requirements for the building and also obtain peak energy requirements for the peak month. Alternative energy sources such as ground source heat pump, solar photovoltaic (PV) panels and day-lighting modifications were applied to redesign the energy consumption for the building towards meeting net-zero energy requirements. The present energy use by the building, DOE Energy software simulations for the building as well as the net-zero model for the building were studied. The extents of the contributions of the individual energy harvesting measures were studied. For meeting Net Zero Energy requirement, it was found that the total energy load for the building can be distributed between alternative energy methods as 5.4% to daylighting modifications, 58% to geothermal and 36.6% to solar photovoltaic panels for electricity supply and thermal energy. Thus the directions to proceed towards achieving complete net-zero energy status were identified.
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9

Kobori, Satoru. "Development of energy conservation technology in Japan, 1920–1970: specific examination of energy intensive industries and energy conservation policy." 名古屋大学大学院経済学研究科附属国際経済政策研究センター, 2014. http://hdl.handle.net/2237/20961.

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10

Trusler, Bonnie R. "Energy watch: an energy conservation project for elementary schools." CSUSB ScholarWorks, 1994. https://scholarworks.lib.csusb.edu/etd-project/38.

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The goal of this project was to organize and implement an energy conservation program for second and fifth grade students that would increase their overall awareness and understanding of energy concepts and energy conservation.
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11

Velthuijsen, Jan Willem. "Determinants of investment in energy conservation /." Amsterdam : Stichting voor Economisch Onderzoek der Universiteit van Amsterdam, 1995. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=007038794&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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12

Sadighi, Amir Abbas. "Energy conservation for I.R. in Iran." Thesis, University of Surrey, 1998. http://epubs.surrey.ac.uk/843253/.

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In 1973 and again in 1979 oil prices increased dramatically forcing many developed and developing nations to begin programmes of energy conservation in different areas of industry. I.R Iran as an oil producing and exporting country never felt the full effect of these global oil shortages. Therefore, it was one of the few countries in the world not to invest much time or money in the study of energy conservation. Recent studies have shown that in less than two decades domestic oil consumption and Iranian oil production will balance. When this happens Iran will lose its revenue from oil exports, upon which it is dependent for foreign currency, and may even have to begin to import energy. Therefore, Iran is not only behind most countries in the investigation of energy conservation technology but is facing severe shortages. This thesis studies Iran's energy production, consumption, and outlines the possibilities for energy conservation in Iran. Chapters 1 through 4 of this work introduce Iran, its geography and location and also provide a synopsis of its current energy situation. Chapter 2 explains Iran's energy balance, outlining the production and consumption of the different fuels used in Iran. Chapter 3 looks at energy demand forecasts as well as price and income elasticities. It is this chapter that highlights Iran's impending energy crisis. Chapter 4 discusses the general energy efficiency potential and obstacles to that energy efficiency in Iran. This chapter touches on the subjects of fuel prices and the institutions set up to control energy. Chapter 5 looks at energy conservation in Industry. It is divided into two main parts; first, a general look at industrial energy conservation techniques and practices in developed and developing nations; second, a specific look at energy conservation in Iranian industry. The latter section is itself divided into three parts; one, an energy audit of the National Industries Organization; two, energy conservation in the cement industry with a specific case study done at the Tehran cement factory; and, three, a general look at energy conservation in the glass industry, with a specific case study done at the Ghazvin Glass Company. Chapter 6 examines energy conservation in Transportation. It opens with a general overview of technical and managerial aspects of energy conservation in transportation in general around the world. Next, it discusses potential for energy conservation related to transportation in Iran. Chapter 7 discusses energy conservation in Mining. There has been very little work done on this subject, especially when compared to the information available on energy conservation in transportation and industry. Therefore, a special study was carried out in this field. This study identified a number of possible areas of energy conservation in mining. A separate section of Chapter 7 describes the Iranian mining sector and notes that its growth will necessitate quite a lot of work on energy conservation in that sector. Chapters 8 and 9 examine Employment and the Environmental aspects of energy conservation. First the subjects are examined in a general way and then they are discussed specifically for the case of Iran. Chapter 10 contains the conclusion and recommendations for every chapter of this work. The study of energy production and use in Iran which is described and discussed in this thesis is related to recommended actions for the future. It is shown that energy conservation can play an important role in the Iranian economy. Not only can it have positive environmental and employment effects, but it can delay the time when Iran ceases to be a net exporter of oil.
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13

Vincent, Patrick J. "Energy conservation in wirless sensor networks." Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Jun%5FVincent.pdf.

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Dissertation (Ph.D. in Electrical Engineering)--Naval Postgraduate School, June 2007.
Thesis Advisor(s): Murali Tummala. "June 2007." Includes bibliographical references (p. 171-179). Also available in print.
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14

Matthews, L. J. "Energy conservation in central urban buildings." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332430.

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15

Vincent, Patrick J. "Energy conservation in wireless sensor networks." Monterey, California. Naval Postgraduate School, 2007, 2007. http://hdl.handle.net/10945/10228.

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This dissertation presents a system-level approach for minimizing the power expended in achieving communication between a ground-based sensor network and an overhead Unmanned Aerial Vehicle (UAV). A subset of sensor nodes, termed a transmit cluster, aggregates data gathered by the network and forms a distributed antenna array, concentrating the radiated transmission into a beam aimed towards the UAV. We present a method for more uniformly distributing the energy burden across the sensor network, specifying the time that should elapse between reassignments of the transmit cluster and the number of hops that should be placed between successive transmit clusters. We analyze the performance of two strategies for reconfiguring the communication burden between the sensor network and the UAV in order to bring the UAV and the sensor network's beam into alignment quickly, while minimizing the energy expenditure. We analyze the optimal number of nodes that should participate in a beamforming process in order to minimize the energy expended by the network, and we provide a framework to analyze the minimum energy expended in a simple beamforming algorithm. Finally, we analyze the probability that an arbitrarily selected sensor node is connected to a specified number of other nodes and we present an algorithm for the formation of near-linear arrays given random placement of nodes.
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16

Mei, Xinxin. "Energy conservation techniques for GPU computing." HKBU Institutional Repository, 2016. https://repository.hkbu.edu.hk/etd_oa/298.

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The emerging general purpose graphics processing units (GPGPU) computing has tremendously speeded up a great variety of commercial and scientific applications. The GPUs have become prevalent accelerators in current high performance clusters. Though the computational capacity per Watt of the GPUs is much higher than that of the CPUs, the hybrid GPU clusters still consume enormous power. To conserve energy on this kind of clusters is of critical significance. In this thesis, we seek energy conservative computing on the GPU accelerated servers. We introduce our studies as follows. First, we dissect the GPU memory hierarchy due to the fact that most of the GPU applications are suffering from the GPU memory bottleneck. We find that the conventional CPU cache models cannot be applied on the modern GPU caches, and the microbenchmarks to study the conventional CPU cache become invalid for the GPU. We propose the GPU-specified microbenchmarks to examine the GPU memory structures and properties. Our benchmark results verify that the design goal of the GPU has transformed from pure computation performance to better energy efficiency. Second, we investigate the impact of dynamic voltage and frequency scaling (DVFS), a successful energy management technique for CPUs, on the GPU platforms. Our experimental results suggest that GPU DVFS is still promising in conserving energy, but the patterns to save energy strongly differ from those of the CPU. Besides, the effect of GPU DVFS depends on the individual application characteristics. Third, we derive the GPU DVFS power and performance models from our experimental results, based on which we find the optimal GPU voltage and frequency setting to minimize the energy consumption of a single GPU task. We then study the problem of scheduling multiple tasks on a hybrid CPU-GPU cluster to minimize the total energy consumption by GPU DVFS. We design an effective offline scheduling algorithm which can reduce the energy consumption significantly. At last, we combine the GPU DVFS and dynamic resource sleep (DRS), another energy management technique, to further conserve the energy, for the online task scheduling on hybrid clusters. Though the idle energy consumption increases significantly compared to the offline problem, our online scheduling algorithm still achieves more than 30% of energy conservation with appropriate runtime GPU DVFS readjustments.
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17

Huang, Ke Colin. "ELECTRORHEOLOGY FOR ENERGY PRODUCTION AND CONSERVATION." Diss., Temple University Libraries, 2010. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/64954.

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Physics
Ph.D.
Recently, based on the physics of viscosity, we developed a new technology, which utilizes electric or magnetic fields to change the rheology of complex fluids to reduce the viscosity, while keeping the temperature unchanged. The method is universal and applicable to all complex fluids with suspended particles of nano-meter, sub-micrometer, or micrometer size. Completely different from the traditional viscosity reduction method, raising the temperature, this technology is energy-efficient, as it only requires small amount of energy to aggregate the suspended particles. In this thesis, we will first discuss this new technology in detail, both in theory and practice. Then, we will report applications of our technology to energy science research. Presently, 80% of all energy sources are liquid fuels. The viscosity of liquid fuels plays an important role in energy production and energy conservation. With an electric field, we can reduce the viscosity of asphalt-based crude oil. This is important and useful for heavy crude oil and off-shore crude oil production and transportation. Especially, since there is no practical way to raise the temperature of crude oil inside the deepwater pipelines, our technology may play a key role in future off-shore crude oil production. Electrorehology can also be used to reduce the viscosity of refinery fuels, such as diesel fuel and gasoline. When we apply this technology to fuel injection, the fuel droplets in the fuel atomization become smaller, leading to faster combustion in the engine chambers. As the fuel efficiency of internal combustion engines depends on the combustion speed and timing, the fast combustion produces much higher fuel efficiency. Therefore, adding our technology on existing engines improves the engine efficiency significantly. A theoretical model for the engine combustion, which explains how fast combustion improves the engine efficiency, is also presented in the thesis.
Temple University--Theses
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18

Lai, Hung-kit. "Energy conservation in building services in Hong Kong /." [Hong Kong : University of Hong Kong], 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13813596.

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19

Marshall, Eileen. "Conservation and economics." Thesis, University of Surrey, 1988. http://epubs.surrey.ac.uk/2720/.

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20

Hawthorne, Colin. "Energy conservation in swimming pools and supermarkets." Thesis, University of Ulster, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359655.

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21

Durbeck, Lisa J. "Global Energy Conservation in Large Data Networks." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/78291.

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Seven to ten percent of the energy used globally goes towards powering information and communications technology (ICT): the global data- and telecommunications network, the private and commercial datacenters it supports, and the 19 billion electronic devices around the globe it interconnects, through which we communicate, and access and produce information. As bandwidth and data rates increase, so does the volume of traffic, as well as the absolute amount of new information digitized and uploaded onto the Net and into the cloud each second. Words like gigabit and terabyte were needless fifteen years ago in the public arena; now, they are common phrases. As people use their networked devices to do more, to access more, to send more, and to connect more, they use more energy--not only in their own devices, but also throughout the ICT. While there are many endeavors focused on individual low-power devices, few are examining broad strategies that cross the many boundaries of separate concerns within the ICT; also, few are assessing the impact of specific strategies on the global energy supply: at a global scale. This work examines the energy savings of several such strategies; it also assesses their efficacy in reducing energy consumption, both within specific networks and within the larger ICT. All of these strategies save energy by reducing the work done by the system as a whole on behalf of a single user, often by exploiting commonalities among what many users around the globe are also doing to amortize the costs.
Ph. D.
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22

Kaplan, David B., Sanjay Reddy, and Srimoyee Sen. "Energy conservation and the chiral magnetic effect." AMER PHYSICAL SOC, 2017. http://hdl.handle.net/10150/625167.

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We analyze the chiral magnetic effect in a homogeneous neutral plasma from the point of view of energy conservation, and construct an effective potential for the growth of maximally helical perturbations of the electromagnetic field. We show that a negative curvature at the origin of the potential, indicating instability of the plasma, is induced by a chiral asymmetry in electron Fermi energy, as opposed to number density, while the potential grows at large field value. It follows that the ground state for a plasma has zero magnetic helicity; a nonzero electron mass will allow an excited state of a plasma with nonzero helicity to relax to that ground state quickly. We conclude that a chiral plasma instability triggered by weak interactions is not a viable mechanism for explaining magnetic fields in stars except possibly when dynamics drives the system far from equilibrium.
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23

Felts, Anne Phillips Ronald G. "Home energy conservation psychological and environmental worldviews /." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/5746.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on September 22, 2009). Thesis advisor: Ronald G. Phillips. Includes bibliographical references.
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24

Jeter, Teresa M. "A model residential energy efficiency program." Virtual Press, 1995. http://liblink.bsu.edu/uhtbin/catkey/941726.

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The opportunity for reducing energy expenditures in homes has never been greater nor has the need been more pressing. Based on the current analysis of weatherization programs, millions of houses do not receive energy efficiency measures and houses that are being weatherized are not receiving the kinds of measures that generate the greatest energy savings. Many of these problems are attributed to program policies, regulations and funding limitations. Given these critical issues. The creative project is a model residential energy efficiency program. Its purpose is to serve as a guide for planning, designing, developing and implementing the kinds of residential energy efficiency programs that will maximize services and benefits. More specifically, the model will assist in the design and implementation of programs that are effective, efficient and can deliver the “right” energy measures to “any” house that needs them. A community in a small Midwestern city was selected to help demonstrate the various components of the model program.
Department of Urban Planning
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25

Aunan, K. "Reduced damage to health and environment from energy saving : a methodology for integrated assessment applied to a case study in Hungary /." Oslo, Norway : Center for International Climate and Environmental Research, 1998. http://www.cicero.uio.no/media/184.pdf.

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26

Kwok-hip, Ngan. "Building energy conservation : an overview of building energy performance in Hong Kong /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B14723098.

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Ngan, Kwok-hip, and 顔國協. "Building energy conservation: an overview of building energy performance in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31253234.

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28

Kilpatrick, Yvonne Younis. "Daylighting and high efficiency lighting : the effects on heating and cooling loads." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/21810.

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29

Oehler, Dirk [Verfasser]. "Energy conservation in syntrophic acetate oxidation / Dirk Oehler." Konstanz : Bibliothek der Universität Konstanz, 2015. http://d-nb.info/1081016477/34.

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30

Hastie, Michele. "Energy and Water Conservation in Biodiesel Purification Processes." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20384.

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Biodiesel purification processes generate wastewater streams that require a large amount of energy when distillation is used as a treatment technology. Process simulation software was used to show that an alternative water treatment process involving ion exchange would require only 31% of the energy used by distillation. Experiments showed that multiple washing stages were required to meet the standard specification for sodium, an impurity present in crude biodiesel, when washing biodiesel made from used frying oil. A comparison was made between washing biodiesel in a cross-current washing configuration and a counter-current configuration. Both configurations met the specification for sodium within three washing stages; however, the counter-current configuration required less water, making it the more efficient process. Lastly, the removal of sodium from wastewater samples using an ion exchange resin was experimentally investigated. The results validated the use of ion exchange to reduce energy consumption in biodiesel purification.
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Cochrane, R. F. "Energy conservation in the zinc-lead blast furnace." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383056.

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Lai, Hung-kit, and 黎鴻傑. "Energy conservation in building services in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31252862.

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33

Skipper, Jack. "Energy conservation for the Euler equations with boundaries." Thesis, University of Warwick, 2018. http://wrap.warwick.ac.uk/106455/.

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In this thesis we study energy conservation for the incompressible Euler equations that model non-viscous fluids. This has been a topic of interest since Onsager conjectured regularity conditions for solutions to conserve energy in 1949. Very recently the full conjecture has been resolved in the case without boundaries. We first perform a study of the different conditions used to ensure energy conservation for domains without boundaries. Results are presented in Chapter 2, as well as an analysis of the similarities between the weakest of these conditions and the conditions we use later with a boundary. We then study the time regularity in Chapter 3 and present a detailed proof for energy conservation without boundaries imposing the conditions ꭒ Ꞓ2 LꝪ (0; T ; L3 ) and Lim │y│→0 1│y│ ∫ ꓔ 0 ∫ │ꭒ(x + y) −u(x│3 dx dt = 0: In Chapters 4 and 5 we consider the easiest case of a at finite boundary corresponding to the domain T2x R+. In Chapter 4 we use an extension argument and impose a condition of continuity at the boundary to prove energy conservation under the conditions that ꭒ Ꞓ2 LꝪ (0; T ; L3 (T2x R+)), Lim │y│∫T0 T2∫∞ │u(x + y) . u(x)j3 dx3dx2dx1dt = 0; ꭒ ꞒL3 (0; T ; L∞ (T2 x[0;ẟ )) and u is continuous at the boundary. We then improve this result further by making it a local method in Chapter 5 and use a different definition of a weak solution where there is no pressure term involved. Chapter 6 considers various different definitions of weak solutions for the incompressible Euler equations on a bounded domain. We study the relations between these varying definitions with and without pressure terms. We then use the recent work of Bardos & Titi (2018), who showed energy conservation with pressure terms included, to get a condition for energy conservation when we consider a weak solution without reference to the pressure term.
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HÄGGQVIST, JACOB, and ERIK WEDIN. "Smart Curtain : An Innovative System for Energy Conservation." Thesis, KTH, Maskinkonstruktion (Inst.), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-191199.

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The goal of the thesis was constructing a control system for a curtain that would regulate its position between up- and down states depending on out/indoor temperature and incoming solar radiation in order to be more energy efficient. A curtain hanging in front of a window creates a pocket of air, which in tandem with the curtain insulates the window and decreases heat loss, but at the same time it vastly decreases how much solar energy enters the room. A considerable part of a households total heat energy loss occurs through its windows. In order to lower this outflow and maximize the inflow of solar energy, it was decided upon to build a system that regulates the state of a window’s curtain. A scaled down prototype was constructed, consisting of a Styrofoam box with a window on one side, and a curtain in front of it. It was used to measure actual energy savings and also compare theoretical coefficients with experimentally procured ones, and extrapolate the results unto a larger scale. Heat transfer rates both with and without the curtain were experimentally tested. This data was then used to implement a computer program, which was developed specifically for the project. It took input arguments needed for the calculations and output whichever curtain state would be most beneficial at any given moment. The program input was partially collected from two temperature sensors and one light sensor. The output was then used to control an actuator in the form of a stepper motor to change the curtain state. Finally, wireless controlling and monitoring of the system utilizing a dashboard accessible via the internet was implemented to permit tracking of data and overriding of the control system’s decisions, should the user desire. It was found that a system of this type could deliver energy savings on the magnitude of tenths of a kilowatt-hour per day during the winter in central Sweden.
Målet med denna kandidattes var att konstruera ett kontrollsystem åt en rullgardin för att reglera dess position mellan upp- och nedfällt läge, beroende på inne- och utetemperatur samt inkommande solstrålning för att spara energi. En gardin som hänger framför ett fönster ger upphov till en luftficka, som tillsammans med gardinen bidrar till att isolera fönstret och minskar värmeförluster, samtidigt som det drastiskt minskar solinstrålning in i rummet. En väldigt stor del av en byggnads totala värmeförluster sker via dess fönster. För att minska detta utflöde och maximera inflöde av solenergi, beslöts det att bygga ett system som reglerar en gardins läge. En prototyp i reducerad skala konstruerades, beståendes av en cellplastlåda med ett fönster med gardin på ena sidan. Den användes för att mäta energibesparingar och för att jämföra teoretiska koefficienter med koefficienter framtagna ur egna experiment, och extrapolera resultaten till en större skala. Värmeöverföringshastighet både med och utan gardin testades experimentellt. Dessa data användes sedan för att implementera ett datorprogram speciellt framtaget för projektet. Det tog emot indata som krävdes för beräkningar, och gav utdata i form av vilket gardinläge som skulle vara mest fördelaktigt vid varje givet tillfälle. Indata hämtades delvis från två temperatursensorer och en ljussensor. Utsignalen användes sedan för att styra en aktuator i form av en stegmotor för att ändra gardinpositionen. Slutligen infördes trådlös styrning och övervakning av systemet via en internet dashboard som samverkar med en MQTT-mäklare, för att tillåta kontroll av data och manuell styrning av gardinen. Slutsatsen nåddes att ett system av denna typ kunde leverera energibesparingar med en magnitud på tiondelars kilowattimmar per dag under vintern i centrala Sverige.
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35

Mardikar, Yogesh Mukesh. "Energy analysis, diagnostics, and conservation in semiconductor manufacturing." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3748.

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Thesis (M.S.)--West Virginia University, 2004.
Title from document title page. Document formatted into pages; contains viii, 152 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 106-108).
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36

Lam, Siu-fai Raymond. "An analysis of the policy of energy efficiency and conservation in Hong Kong in the 1990s." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19709833.

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37

Wong, Chun-hung Samuel. "Opportunities for building energy conservation in Hong Kong (residential buildings) /." Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1873439X.

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38

Bothma, Johan. "Landscape and architectural devices for energy-efficient South Africa suburban residential design." Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-01122005-070827.

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39

Blair, Cynthia Gail. "Developing an inservice on energy and energy conservation for teachers, grades kindergarten-eight." CSUSB ScholarWorks, 1991. https://scholarworks.lib.csusb.edu/etd-project/37.

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40

Rothbauer, Scott Joseph. "Facility energy survey." Online version, 2002. http://www.uwstout.edu/lib/thesis/2002/2002rothbauers.pdf.

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41

Shabo, Daniel Joseph. "Evaluation of operating parameters for chillers, cooling towers, and air-handlers in a large commercial building." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/17848.

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42

Barakat, Magdi H. "Computation of indoor airflow for thermal comfort in residential buildings." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/23308.

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43

Fore, Elizabeth K. "An analysis regarding energy efficiency in metro Atlanta's private office buildings." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29663.

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Thesis (M. S.)--Building Construction, Georgia Institute of Technology, 2009.
Committee Chair: Kathy Roper; Committee Member: Daniel Castro-Lacouture; Committee Member: Linda Thomas-Mobley. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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44

Larmer, Robert A. "Philosophy and the principle of the conservation of energy." Thesis, University of Ottawa (Canada), 1985. http://hdl.handle.net/10393/5035.

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45

Pereira, de Araujo Joao Lucas. "Promoting residential energy conservation through real-time consumption feedback /." Connect to resource, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1164833138.

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46

Raphoto, Mosoaboli Sarel. "Effective teaching of conservation of mechanical energy / M.S. Raphoto." Thesis, North-West University, 2008. http://hdl.handle.net/10394/3635.

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The understanding of the scientific meaning of the concept of energy and the principle of the conservation of mechanical energy is affected by various connotations and meanings that the concept and principle have in everyday language use. Young children develop and formulate their own conceptual meanings and understanding of the concepts that often differ from the scientific meanings. These preconceived ideas are termed alternative conceptions of the learners. Learners associate the concept of energy with living and moving objects, in other words, the difficulties experienced by learners in comprehending the scientific concept of energy and its conservation are embedded in their anthropocentric and anthropomorphic views. Focusing on the nature and origins of these alternative conceptions held by learners, a literature study of contemporary constructivist teaching and learning strategies was conducted. The theoretical investigations led to an empirical study. A quantitative action research methodology was undertaken. Firstly, a questionnaire was designed and administered to grade 10 learners to diagnose their alternative conceptions about the concept of energy and the principle of conservation of energy. The results of the questionnaire were analyzed to determine the nature of the alternative conceptions held by the learners. Secondly, an intervention program was designed. During the intervention various factors that might contribute to learners' conceptualization of the concept of energy were exploited. Contemporary teaching-learning approaches and strategies, which are constructivist in nature, were used. Inquiry teaching was implemented through the 5E instructional model. The teaching and learning experiences were contextualized, i.e., they were designed using situations and experiences that were familiar to the learners. Thirdly, the success of the intervention to accomplish conceptual change was assessed. The analysis of the results of the empirical study shows a significant improvement of the learners' understanding of energy and its conservation. This was reflected in the calculated normalized learning gain of 68%. The results show the importance for teachers to continuously do active research on various aspects of the educational environment like learners' alternative conceptions, contemporary teaching-learning strategies and contextual factors that might influence effective teaching and learning.
Thesis (M.Ed.)--North-West University, Potchefstroom Campus, 2009.
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Sheldrick, W. J. "Local authority involvement with energy conservation in the U.K." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375367.

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48

Gutierrez, Lagos Luis Daniel. "Advanced voltage control for energy conservation in distribution networks." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/advanced-voltage-control-for-energy-conservation-in-distribution-networks(2718dcf1-f5db-45df-84e2-4890956ba8b1).html.

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The increasing awareness on the effect of carbon emissions in our planet has led to several countries to adopt targets for their reduction. One way of contributing to this aim is to use and distribute electricity more efficiently. In this context, Conservation Voltage Reduction (CVR), a well-known technique that takes advantage of the positive correlation between voltage and demand to reduce energy consumption, is gaining renewed interest. This technique saves energy by only reducing customer voltages, without relying on customer actions and, therefore, can be controlled by the Distribution Network Operator (DNO). CVR not only brings benefits to the electricity system by reducing generation requirements (fewer fossil fuel burning and carbon emissions), but also to customers, as energy bill reductions. The extent to which CVR can bring benefits mainly depends on the customers load composition and their voltages. While the former dictates the voltage-demand correlation, the latter constraints the voltage reduction that can be applied without violating statutory limits. Although CVR has been studied for many years, most of the studies neglect the time-varying voltage-demand characteristic of loads and/or do not assess end customer voltages. While these simplifications could be used to estimate CVR benefits for fixed and limited voltage reductions, realistic load and network models are needed to assess the performance of active CVR schemes, where voltages are actively managed to be close to the minimum limit. Moreover, distribution networks have been traditionally designed with limited monitoring and controllability. Therefore, CVR has been typically implemented by adopting conservative voltage reductions from primary substations, for both American and European-style networks. However, as new infrastructure is deployed in European-style LV networks (focus of this work), such as monitoring and on-load tap changers (OLTCs), the opportunity arises to actively manage voltages closer to end customer (unlocking further energy savings). Although these technologies have shown to effectively control voltages in LV networks, their potential for CVR has not been assessed before. Additionally, most CVR studies were performed in a context where distributed generation (DG) was not common. However, this has changed in many countries, with residential photovoltaic (PV) systems becoming popular. As this is likely to continue, the interactions of residential PV and CVR need to be studied. This thesis contributes to address the aforementioned literature gaps by: (i) proposing a simulation framework to characterise the time-varying voltage-demand correlation of individual end customers; (ii) developing a process to model real distribution networks (MV and LV) from DNO data; (iii) adopting a Monte Carlo-based quantification process to cater for the uncertainties related to individual customer demand; (iv) assessing the CVR benefits that can be unlocked with new LV infrastructure and different PV conditions. To accomplish (iv), first, a simple yet effective rule-based scheme is proposed to actively control voltages in OLTC-enabled LV networks without PV and using limited monitoring. It is demonstrated that by controlling voltages closer to customers, annual energy savings can increase significantly, compared to primary substation voltage reductions. Also, to understand the effect of PV on CVR, a centralized, three-phase AC OPF-based CVR scheme is proposed. This control, using monitoring, OLTCs and capacitors across MV and LV networks, actively manages voltages to minimize energy consumption in high PV penetration scenarios whilst considering MV-LV constraints. Results demonstrate that without CVR, PV systems lead to higher energy imports for customers without PV, due to higher voltages. Conversely, the OPF-based CVR scheme can effectively manage voltages throughout the day, minimising energy imports for all customers. Moreover, if OLTCs at secondary substations are available (and managed in coordination with the primary substation OLTC), these tend to regulate customer voltages close to the minimum statutory limit (lower tap positions), while the primary OLTC delivers higher voltages to the MV network to also reduce MV energy losses.
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49

Pereira-de-Araujo, Joao Lucas. "Promoting residential energy conservation throught real-time consumption feedback." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1164833138.

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50

Demigha, Oualid. "Energy Conservation for Collaborative Applications in Wireless Sensor Networks." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0058/document.

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Les réseaux de capteurs sans fil est une technologie nouvelle dont les applications s'étendent sur plusieurs domaines: militaire, scientifique, médicale, industriel, etc. La collaboration entre les noeuds capteurs, caractérisés par des capacités minimales en termes de capture, de transmission, de traitement et d'énergie, est une nécessité pour réaliser des tâches aussi complexes que la collecte des données, le pistage des objets mobiles, la surveillance des zones sensibles, etc. La contrainte matérielle sur le développement des ressources énergétiques des noeuds capteurs est persistante. D'où la nécessité de l'optimisation logicielle dans les différentes couches de la pile protocolaire et du système d'exploitation des noeuds. Dans cette thèse, nous approchons le problème d'optimisation d'énergie pour les applications collaboratives via les méthodes de sélection des capteurs basées sur la prédiction et la corrélation des données issues du réseau lui-même. Nous élaborons plusieurs méthodes pour conserver les ressources énergétiques du réseau en utilisant la prédiction comme un moyen pour anticiper les actions des noeuds et leurs rôles afin de minimiser le nombre des noeuds impliqués dans la tâche en question. Nous prenons l'application de pistage d'objets mobiles comme un cas d'étude. Ceci, après avoir dresser un état de l'art des différentes méthodes et approches récentes utilisées dans ce contexte. Nous formalisons le problème à l'aide d'un programme linéaire à variables binaires dans le but de trouver une solution générale exacte. Nous modélisons ainsi le problème de minimisation de la consommation d'énergie des réseaux de capteurs sans fil, déployé pour des applications de collecte de données soumis à la contrainte de précision de données, appelé EMDP. Nous montrons que ce problème est NP-Complet. D'où la nécessité de solutions heuristiques. Comme solution approchée, nous proposons un algorithme de clustering dynamique, appelé CORAD, qui adapte la topologie du réseau à la dynamique des données capturées afin d'optimiser la consommation d'énergie en exploitant la corrélation qui pourrait exister entre les noeuds. Toutes ces méthodes ont été implémentées et testées via des simulations afin de montrer leur efficacité
Wireless Sensor Networks is an emerging technology enabled by the recent advances in Micro-Electro-Mechanical Systems, that led to design tiny wireless sensor nodes characterized by small capacities of sensing, data processing and communication. To accomplish complex tasks such as target tracking, data collection and zone surveillance, these nodes need to collaborate between each others to overcome the lack of battery capacity. Since the development of the batteries hardware is very slow, the optimization effort should be inevitably focused on the software layers of the protocol stack of the nodes and their operating systems. In this thesis, we investigated the energy problem in the context of collaborative applications and proposed an approach based on node selection using predictions and data correlations, to meet the application requirements in terms of energy-efficiency and quality of data. First, we surveyed almost all the recent approaches proposed in the literature that treat the problem of energy-efficiency of prediction-based target tracking schemes, in order to extract the relevant recommendations. Next, we proposed a dynamic clustering protocol based on an enhanced version of the Distributed Kalman Filter used as a prediction algorithm, to design an energy-efficient target tracking scheme. Our proposed scheme use these predictions to anticipate the actions of the nodes and their roles to minimize their number in the tasks. Based on our findings issued from the simulation data, we generalized our approach to any data collection scheme that uses a geographic-based clustering algorithm. We formulated the problem of energy minimization under data precision constraints using a binary integer linear program to find its exact solution in the general context. We validated the model and proved some of its fundamental properties. Finally and given the complexity of the problem, we proposed and evaluated a heuristic solution consisting of a correlation-based adaptive clustering algorithm for data collection. We showed that, by relaxing some constraints of the problem, our heuristic solution achieves an acceptable level of energy-efficiency while preserving the quality of data
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