Dissertations / Theses on the topic 'Energy systems and analysis'
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Dale, Michael Anthony Joseph. "Global Energy Modelling : A Biophysical Approach (GEMBA)." Thesis, University of Canterbury. Mechanical Engineering, 2010. http://hdl.handle.net/10092/5156.
Full textChohan, Ghulam Yasin. "Statistical energy analysis of nonconservative dynamical systems." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239507.
Full textOmu, Akomeno. "Integrated analysis of distributed energy resource systems." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708238.
Full textSisler, Nicholas Daniel. "Systems analysis of major consumer energy decisions." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68859.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 53-55).
American consumers make a number of decisions that significantly impact their energy use. Some of the most important of these decisions were identified and analyzed for the purpose of including them in a Consumer Energy Decisions Model (CEDM). These decisions included housing choices that affect space heating, water heating, solar photovoltaic and transportation. The CEDM was used to calculate values of recurring and capital cost for all permutations of all the decision components for New York City, Minneapolis and Seattle. These results were analyzed using Pareto plots of recurring versus capital cost. There was a wide range of costs associated with the different solutions, indicating that there is tremendous value in making good energy decisions. The type of vehicle showed the most notable effect on return on investment. Four vehicles were analyzed, a Toyota Camry, Camry Hybrid, Jetta Turbo Diesel (TDI) and an electric Nissan Leaf. The hybrid showed the worst return on investment relative to the Camry with a payback rate of about 9 years, while the TDI and Leaf had payback rates of 1-2 and 6-10 years relative to the Camry, with the added benefits of using less energy and emitting less CO₂. Housing choices were the next most favorable investments, with payback rates around 10 years for the most economical choices. They showed good returns at some points but showed diminishing returns as continued improvements were made. Finally, the solar PV and solar hot water options are bad investments for the sites analyzed, which receive much less sunlight than other parts of the country. The effects of incentives and tax credits were not analyzed in this study.
by Nicholas Daniel Sisler.
S.B.
Yost, Keith A. "Decision analysis for geothermal energy." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70417.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 151).
One of the key impediments to the development of enhanced geothermal systems is a deficiency in the tools available to project planners and developers. Weak tool sets make it difficult to accurately estimate the cost and schedule requirements of a proposed geothermal plant, and thus make it more difficult for those projects to survive an economic decision-making process. This project, part of a larger effort led by the Department of Energy, seeks to develop a suite of decision analysis tools capable of accurately gauging the economic costs and benefits of geothermal projects with uncertain outcomes. In particular. this project seeks to adapt a set of existing tools, the Decision Aids for Tunnelling, to the context of well-drilling, and make them suitable for use as a core software set around which additional software models can be added. We assess the usefulness of the Decision Aids for Tunnelling (DAT) by creating two realistic case studies to serve as proofs of concept. These case studies are then put through analyses designed to reflect project risks to which geothermal wells are vulnerable. We find that the DAT have sufficient flexibility to model geothermal projects accurately and provide cost and schedule distributions on potential outcomes of geothermal projects, and recommend methods of usage appropriate to well drilling scenarios.
by Keith A. Yost..
S.M.in Technology and Policy
Cvetkovic, Igor. "Modeling, Analysis and Design of Renewable Energy Nanogrid Systems." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/34994.
Full textMaster of Science
Rivano, Giuseppina. "Analysis of offshore hybrid energy systems for improved dispatchability of wave energy." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.
Find full textGonzález, López Jaime Rafael. "Relational analysis of energy systems: Theory and applications." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/667868.
Full textThis thesis presents a novel framework for the biophysical energetic analysis of social-ecological systems based on complexity theory. Through the implementation of MuSIASEM and Relational Analysis, it generates information useful for policy discussion in a complex world where understanding sustainability is necessary. Also, it is useful for contesting agendas at integrating non-equivalent information. With the integration of the functional and structural perspective of complex systems, questions like where, how, why and what are addressed. This framework is demonstrated with some examples mainly in the Mexican Energy Reform context. You can find that al examples cover a broad diversity of energetic systems: biomass, oil and gas, electricity, and it also is argued why this framework is necessary compared to the most popular methodologies in the contemporary era. Reducing sustainability into some ratios is avoided. This thesis embraces complexity by analyzing the non-linear relations among the different social-ecological systems with the environment and within themselves. How these relations affect different outcomes and by these the anticipation which is necessary to understand when making plans for the systems under dispute. The First Chapter presents an application of the Relational Analysis and MuSIASEM to the metabolism of a village. This village is in the transition from biomass to fossil fuel, and thus implies many adjustments over functional and structural elements in the village, due to the change from subsistence into a market-based village. Within the chosen analytical framework this change can be related to the change of type of fuel and changes in social practices within the economy. The Second Chapter presents an application of the Relational Analysis and MuSIASEM to the oil and gas sector of Mexico; the analysis is used to comment on the current Energy Reform in Mexico. This chapter brings a biophysical analysis of the oil & gas sector of Mexico. Looking at the current pattern of oil and gas production in Mexico it discusses whether Mexico should remain with the same pattern or change it. It also shows the importance of complementing the economic analysis with other types of analysis dealing with issues such as energy sovereignty, environmental impact and geographic location of economic activities. In short, it shows the importance of complementing reductionist analysis when planning. Third Chapter presents an application of the Relational Analysis and MuSIASEM to the electricity production in Mexico. The analysis of the relations between structural and functional elements allow studying the nexus between land, energy, and emissions. In particular, it elucidates the spatial constraints that can be associated with the expansion of alternative sources of electricity. In the past, we emancipated from the need of using a lot of land for energy purposes by using fossil fuels. But how strong is this emancipation when relying on intermittent electricity (wind and PV)? To answer this question, we have to address the increasing demand for importation of natural gas as a back-up of the intermittent sources of electricity, and the potential rebound effect of this solution, if the pattern of consumption remains the same. In the Fourth Chapter I demonstrate how the functional perspective can be used to introduce a novel approach to energy system analysis This application shows the weakness of assessments based on ratios (EROEI for example) if we want to address the complexity associated with sustainability. Radical simplifications of indicators of energy performance (simplistic definitions of energy) can be useful for those interested in “technofixes” but not for understanding the functioning of the system. For this reason, a systemic analysis of structural and functional relations should be incorporated in the energy analysis if we want to make it useful for the understanding of the interaction of socioecological systems.
Gong, Mei, Göran Wall, and Sven Werner. "Energy and exergy analysis of district heating systems." Högskolan i Halmstad, Energiteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-20298.
Full textChavarria, Reyes Elias. "Energy modeling and analysis in heterogeneous cellular systems." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54299.
Full textLøken, Espen. "Multi-Criteria Planning of Local Energy Systems with Multiple Energy Carriers." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1490.
Full textBackground and Motivation
Unlike what is common in Europe and the rest of the world, Norway has traditionally met most of its stationary energy demand (including heating) with electricity, because of abundant access to hydropower. However, after the deregulation of the Norwegian electricity market in the 1990s, the increase in the electricity generation capacity has been less than the load demand increase. This is due to the relatively low electricity prices during the period, together with the fact that Norway’s energy companies no longer have any obligations to meet the load growth. The country’s generation capacity is currently not sufficient to meet demand, and accordingly, Norway is now a net importer of electricity, even in normal hydrological years. The situation has led to an increased focus on alternative energy solutions.
It has been common that different energy infrastructures – such as electricity, district heating and natural gas networks – have been planned and commissioned by independent companies. However, such an organization of the planning means that synergistic effects of a combined energy system to a large extent are neglected. During the last decades, several traditional electricity companies have started to offer alternative energy carriers to their customers. This has led to a need for a more comprehensive and sophisticated energy-planning process, where the various energy infrastructures are planned in a coordinated way. The use of multi-criteria decision analysis (MCDA) appears to be suited for coordinated planning of energy systems with multiple energy carriers. MCDA is a generic term for different methods that help people make decisions according to their preferences in situations characterized by multiple conflicting criteria.
The thesis focuses on two important stages of a multi-criteria planning task:
- The initial structuring and modelling phase
- The decision-making phase
The Initial Structuring and Modelling Phase
It is important to spend sufficient time and resources on the problem definition and structuring, so that all disagreements among the decision-maker(s) (DM(s)) and the analyst regarding the nature of the problem and the desired goals are eliminated. After the problem has been properly identified, the next step of a multi-criteria energy-planning process is the building of an energy system model (impact model). The model is used to calculate the operational attributes necessary for the multi-criteria analysis; in other words, to determine the various alternatives’ performance values for some or all of the criteria being considered. It is important that the model accounts for both the physical characteristics of the energy system components and the complex relationships between the system parameters. However, it is not propitious to choose/build an energy system model with a greater level of detail than needed to achieve the aims of the planning project.
In my PhD research, I have chosen to use the eTransport model as the energy system model. This model is especially designed for planning of local and regional energy systems, where different energy carriers and technologies are considered simultaneously. However, eTransport can currently provide information only about costs and emissions directly connected to the energy system’s operation. Details about the investment plans’ performance on the remaining criteria must be found from other information sources. Guidelines should be identified regarding the extent to which different aspects should be accounted for, and on the ways these impacts can be assessed for each investment plan under consideration. However, it is important to realize that there is not one solution for how to do this that is valid for all kind of local energy-planning problems. It is therefore necessary for the DM(s) and the analyst to discuss these issues before entering the decision-making phase.
The Decision-Making Phase
Two case studies have been undertaken to examine to what extent the use of MCDA is suitable for local energy-planning purposes. In the two case studies, two of the most well-known MCDA methods, the Multi-Attribute Utility Theory (MAUT) and the Analytical Hierarchy Process (AHP), have been tested. Other MCDA methods, such as GP or the outranking methods, could also have been applied. However, I chose to focus on value measurement methods as AHP and MAUT, and have not tested other methods. Accordingly, my research cannot determine if value measurement methods are better suited for energy-planning purposes than GP or outranking methods are.
Although all MCDA methods are constructed to help DMs explore their ‘true values’ – which theoretically should be the same regardless of the method used to elicit them – our experiments showed that different MCDA methods do not necessarily provide the same results. Some of the differences are caused by the two methods’ different ways of asking questions, as well as the DMs’ inability to express clearly their value judgements by using one or both the methods. In particular, the MAUT preference-elicitation procedure was difficult to understand and accept for DMs without previous experience with the utility concept. An additional explanation of the differences is that the external uncertainties included in the problem formulation are better accounted for in MAUT than in AHP. There are also a number of essential weaknesses in the theoretical foundation of the AHP method that may have influenced the results using that method. However, the AHP method seems to be preferred by DMs, because the method is straightforward and easier to use and understand than the relatively complex MAUT method.
It was found that the post-interview process is essential for a good decision outcome. For example, the results from the preference aggregation may indicate that according to the DM’s preferences, a modification of one of the alternatives might be propitious. In such cases, it is important to realize that MCDA is an iterative process. The post-interview process also includes presentation and discussion of results with the DMs. Our experiments showed that the DMs might discover inconsistencies in the results; that the results do not reflect the DM’s actual preferences for some reason; or that the results simply do not feel right. In these cases, it is again essential to return to an earlier phase of the MCDA process and conduct a new analysis where these problems or discrepancies are taken into account.
The results from an MAUT analysis are usually presented to the DMs in the form of expected total utilities given on a scale from zero to one. Expected utilities are convenient for ranking and evaluation of alternatives. However, they do not have any direct physical meaning, which quite obviously is a disadvantage from an application point of view. In order to improve the understanding of the differences between the alternatives, the Equivalent Attribute Technique (EAT) can be applied. EAT was tested in the first of the two case studies. In this case study, the cost criterion was considered important by the DMs, and the utility differences were therefore converted to equivalent cost differences. In the second case study, the preference elicitation interviews showed, quite surprisingly, that cost was not considered among the most important criteria by the DMs, and none of the other attributes were suitable to be used as the equivalent attribute. Therefore, in this case study, the use of EAT could not help the DMs interpreting the differences between the alternatives.
Summarizing
For MCDA to be really useful for actual local energy planning, it is necessary to find/design an MCDA method which: (1) is easy to use and has a transparent logic; (2) presents results in a way easily understandable for the DM; (3) is able to elicit and aggregate the DMs' real preferences; and (4) can handle external uncertainties in a consistent way.
Awopone, Albert Kotawoke. "Optimising energy systems of Ghana for long-term scenarios." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/14752.
Full textYing, Song. "Energy analysis for a snow-free surface : A technical analysis of the benefits of insulation under the heating pipes." Thesis, Högskolan i Gävle, Energisystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-26910.
Full textSelvaraj, Rajkumar. "Plant-wide energy assessment using a systems approach." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3125.
Full textTitle from document title page. Document formatted into pages; contains vi, 97 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 97).
Soundararajan, Ranjith. "Energy system analysis." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-12001.
Full textKaya, Firat Ayse. "Early growth technology analysis : case studies in solar energy and geothermal energy." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62107.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 85-87).
Public and private organizations try to forecast the future of technological developments and allocate funds accordingly. Based on our interviews with experts from MIT's Entrepreneurship Center, Sloan School of Management, and IBM, and review of literature, we found out that this important fund allocation process is dominated by reliance on expert opinions, which has important drawbacks alongside its advantages. In this Thesis, we introduce a data-driven approach, called early growth technology analysis, to technology forecasting that utilizes diverse information sources to analyze the evolution of promising new technologies. Our approach is based on bibliometric analysis, consisting of three key steps: extraction of related keywords from online publication databases, determining the occurrence frequencies of these keywords, and identifying those exhibiting rapid growth. Our proposal goes beyond the theoretical level, and is embodied in software that collects the required inputs from the user through a visual interface, extracts data from web sites on the fly, performs an analysis on the collected data, and displays the results. Compared to earlier software within our group, the new interface offers a much improved user experience in performing the analysis. Although these methods are applicable to any domain of study, this Thesis presents results from case studies on the fields of solar and geothermal energy. We identified emerging technologies in these specific fields to test the viability of our results. We believe that data-driven approaches, such as the one proposed in this Thesis, will increasingly be used by policy makers to complement, verify, and validate expert opinions in mapping practical goals into basic/applied research areas and coming up with technology investment decisions.
by Ayse Kaya Firat.
S.M.in Technology and Policy
Kifleyesus, Biniam Okbaendrias. "Eneregy Management In Industries : Analysis of Energy Saving potential by Steam conedensate recovery." Thesis, Högskolan i Gävle, Energisystem, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-25090.
Full textColpan, Can Ozgur. "Exergy Analysis Of Combined Cycle Cogeneration Systems." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605993/index.pdf.
Full textMolinari, Marco. "Exergy Analysis in Buildings : A complementary approach to energy analysis." Licentiate thesis, KTH, Civil and Architectural Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11537.
Full textThough mandatory to be pursued, improved energy efficiency is not the only target to reach. The quality of energy has to be assessed as well. Most of the overall energy use in residential building is for low temperature heat, i.e. temperatures relatively close to the outdoor conditions. From a thermodynamic point of view, this is a degraded form of energy with low potential to be converted into work. On the other hand energy demand is mostly met with high quality energy, such as electricity and natural gas. There is a mismatch between supply and demand, which is not clearly shown by the sole energy analysis. Target of this thesis is to analyze the energy use in buildings from the point of view of its quality, to provide effective theoretical and calculation tools to investigate this mismatch, to assess its magnitudo and to propose improvements aiming at a more rational use of the energy. The idea behind the quality is clarified with the concept of exergy.
The potential for improvement in space heating is shown. In no heating system the overall exergy efficiency is above 20%, with fossil fuels. Using direct electricity heating results in exergy efficiency below 7%. Most of the household appliances processes have low-exergy factors but still are supplied with electricity. This results in poor exergy efficiencies and large exergy losses.
Systems are poorly performing because little consideration is explicitly given to energy quality. Policies to lower the energy demand, though vital as first step towards an improved use of energy, should not neglect the exergy content.
The problem is then shifted to find suitable supplies. Electricity can be exploited with low exergy losses with high-COP heat pumps. Use of fossil fuels for heating purposes should be avoided. District heating from cogeneration and geothermal proves to be a suitable solution at the building level. The issues connected to its exploitation forces to shift the boundary layers of the analysis from the building level to the community level. A rational use of energy should address the community level. The system boundaries have to be enlarged to a dimension where both the energy conversion and use take place with reduced energy transportation losses. This is a cost-effective way to avoid the waste of the exergy potential of the sources with exergy cascade and to make it possible the integration of with renewable sources. Exergy efficiency of the buildings is a prerequisite for a better of energy in this field.
IEA ECBCS Annex 49: Low Exergy Systems for High Performance Buildings and Communities
ESF Cost C24: Analysis and Design of Innovative Systems for Low-EXergy in the Built Environment: COSTeXergy
Mo, Weiwei. "Water's Dependence on Energy: Analysis of Embodied Energy in Water and Wastewater Systems." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4374.
Full textTorre, Andoni. "Energy analysis of a house and proposals for improvements." Thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30133.
Full textEld, Jonas, and Jens Melin. "Test Grids for Reliability analysis : Analysing interruptions and developing test grids based on Mälarenergi Elnät distribution grid." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-35925.
Full textAnheden, Marie. "Analysis of gas turbine systems for sustainable energy conversion." Doctoral thesis, KTH, Chemical Engineering and Technology, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2914.
Full textIncreased energy demands and fear of global warming due tothe emission of greenhouse gases call for development of newefficient power generation systems with low or no carbondioxide(CO2) emissions. In this thesis, two different gasturbine power generation systems, which are designed with theseissues in mind, are theoretically investigated and analyzed.Inthe first gas turbine system, the fuel is combusted using ametal oxide as an oxidant instead of oxygen in the air. Thisprocess is known as Chemical Looping Combustion (CLC). CLC isclaimed to decrease combustion exergy destruction and increasethe power generation efficiency. Another advantage is thepossibility to separate CO2without a costly and energy demanding gasseparation process. The system analysis presented includescomputer-based simulations of CLC gas turbine systems withdifferent metal oxides as oxygen carriers and different fuels.An exergy analysis comparing the exergy destruction of the gasturbine system with CLC and conventional combustion is alsopresented. The results show that it is theoretically possibleto increase the power generation efficiency of a simple gasturbine system by introducing CLC. A combined gas/steam turbinecycle system with CLC is, however, estimated to reach a similarefficiency as the conventional combined cycle system. If thebenefit of easy and energy-efficient CO2separation is accounted for, a CLC combined cyclesystem has a potential to be favorable compared to a combinedcycle system with CO2separation.
In the second investigation, a solid, CO2-neutral biomass fuel is used in a small-scaleexternally fired gas turbine system for cogeneration of powerand district heating. Both open and closed gas turbines withdifferent working fluids are simulated and analyzed regardingthermodynamic performance, equipment size, and economics. Theresults show that it is possible to reach high power generationefficiency and total (power-and-heat) efficiency with thesuggested system. The economic analysis reveals that the costof electricity from theEFGT plant is competitive with the moreconventional alternatives for biomass based cogeneration in thesame size range (<10 MWe).
Keywords:power generation, Chemical Looping Combustion,CO2separation, oxygen carrier, biomass fuel, closedcycle gas turbine, externally fired gas turbine
Mitcheson, Paul D. "Analysis and optimisation of energy-harvesting micro-generator systems." Thesis, Imperial College London, 2005. http://hdl.handle.net/10044/1/4325.
Full textAhmed, Imran. "Design and analysis of energy harvesting wireless communication systems." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63766.
Full textApplied Science, Faculty of
Engineering, School of (Okanagan)
Graduate
Ezanno, Philippe. "Vibration localization and statistical energy analysis in coupled systems." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-06112009-063056/.
Full textFernando, Anton Tharanga Deshan. "Embodied Energy Analysis of New Zealand Power Generation Systems." Thesis, University of Canterbury. Electrical and Computer Engineering, 2010. http://hdl.handle.net/10092/5213.
Full textVecci, Roberta <1978>. "Theoretical and Experimental Analysis of micro-CHP Energy Systems." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5814/.
Full textSiddiqui, Arooj Mubashara. "Design and performance analysis of energy harvesting communications systems." Thesis, Lancaster University, 2017. http://eprints.lancs.ac.uk/88131/.
Full textBaz, Abdullah Omar Mohammad. "Design and analysis of SRAMs for energy harvesting systems." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2497.
Full textWENG, CHIYUAN. "Transient Stability Analysis of Power Systems with Energy Storage." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1348453228.
Full textBaier, Christel, Philipp Chrszon, Clemens Dubslaff, Joachim Klein, and Sascha Klüppelholz. "Energy-Utility Analysis of Probabilistic Systems with Exogenous Coordination." Springer, 2018. https://tud.qucosa.de/id/qucosa%3A70851.
Full textBozzolani, Emanuele. "Techno-economic analysis of compressed air energy storage systems." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/6786.
Full textTyner, Gene T. "Net energy analysis of nuclear and wind power systems /." Full-text version available from OU Domain via ProQuest Digital Dissertations, 1985.
Find full textWollein, Jonathan. "Investment analysis for solar PV cells in Sweden." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-34087.
Full textChavan, Raviraj Ratnakar. "Analysis of energy consumption in continuous galvanizing lines." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4731.
Full textTitle from document title page. Document formatted into pages; contains vii, 83 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 80-82).
Hutton, Barbara. "Energy transfer studies in polymer and dye scintillator systems." Thesis, Lancaster University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282378.
Full textkollappillai, Murugan Sai Varun. "Analysis of Hybrid Offshore Floating Wind and Marine Power." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-36861.
Full textSmpokos, Georgios. "Performance Analysis in Wireless HetNets: Traffic, Energy, and Secrecy Considerations." Licentiate thesis, Linköpings universitet, Kommunikations- och transportsystem, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-174244.
Full textFunding agencies: Europen Union's Horizon 2020 Marie Sk lodowska-Curie Actionsproject WiVi-2020 (H2020-MSCA-ITN-2014-EID 642743-WiVi-2020)
Grubb, M. J. "The integration and analysis of intermittent sources on electricity supply systems." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382217.
Full textLee, Heechang. "An analysis of the impact of datacenter temperature on energy efficiency." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/76590.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 65-66).
The optimal air temperature for datacenters is one of ways to improve energy efficiency of datacenter cooling systems. Many datacenter owners have been interested in raising the room temperature as a quick and simple method to increase energy efficiency. The purpose of this paper is both to provide recommendations on maximizing the energy efficiency of datacenters by optimizing datacenter temperature setpoint, and to understand the drivers of datacenter costs. This optimization and the potential energy savings used in cooling system can drive higher energy use in IT equipment and may not be a good trade off. For this reason, this paper provided a detailed look at the overall effect on energy of temperature changes in order to figure out the optimal datacenter temperature setpoint. Since this optimal temperature range varies by equipment and other factors in the datacenter, each datacenter should identify its appropriate temperature based on the optimization calculation in this paper. Sensitivity analysis is used to identify the drivers of the cost of ownership in a datacenter and to identify opportunities for datacenter efficiency improvement. The model is also used to evaluate potential datacenter efficiency.
by Heechang Lee.
S.M.in Engineering and Management
Niaparast, Shervin. "ENERGY ANALYSIS OF A SOLAR BLIND CONCEPT INTEGRATED WITH ENERGY STORAGE SYSTEM." Thesis, KTH, Kraft- och värmeteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-131419.
Full textHalter, Megaera C. "Energy-turns analysis for a scramjet powered missle." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43753.
Full textA reduced order model describing the energy and heading angle
dynamics of a scramjet missile is developed using a singular
perturbation technique. The cruise analysis is briefly reviewed to
determine the conditions at which the missile will cruise most
efficiently. The turn and climb performance of the missile over the
conditions of interest is then examined and a family of extremal
trajectories is constructed which asymptotically approach the cruise at
an intermediate altitude.
Master of Science
Akeyo, Oluwaseun M. "ANALYSIS AND SIMULATION OF PHOTOVOLTAIC SYSTEMS INCORPORATING BATTERY ENERGY STORAGE." UKnowledge, 2017. http://uknowledge.uky.edu/ece_etds/107.
Full textMudulodu, Sai Sankar. "A systems analysis of pyrolysis systematics to serve energy requirements." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1001171.
Full textMcGlashan, Kelsey Bekr. "An Economic Analysis of Injecting Energy Storage into Power Systems Containing Renewables." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-theses/911.
Full textLu, Xin. "Analysis and optimal design of micro-energy harvesting systems for wireless sensor nodes." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/11011.
Full textFlett, Graeme. "Modelling and analysis of energy demand variation and uncertainty in small-scale domestic energy systems." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27959.
Full textZhou, Fengquan 1969. "Modeling and analysis of wind farm impacts on power systems." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82650.
Full textThe focus of this research is on the modeling of wind farms and the issues related to the interconnection of wind farms with the utility grid. Voltage stability problems are investigated for both strong and weak interconnections. Furthermore, the model and control of the Superconducting Magnetic Energy Storage (SMES) system is introduced into the wind farms to improve the power quality of wind farms. The study is conducted firstly, on a single wind energy conversion system, followed by addition of the issues of voltage stability and VAr compensation, and finally the investigation of the impact of wind farms on power quality are discussed in detail.
Glass, Alexander. "Analysis of building-integrated renewable energy systems in modern UK homes." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/analysis-of-buildingintegrated-renewable-energy-systems-in-modern-uk-homes(cbe439a3-2e3b-4d07-af3b-af3d6bd8031a).html.
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