Дисертації з теми "Offshore geothermal energy system"
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Erceg, Ivan P. "Mathematical Analysis of a Geothermal System." Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1225138202.
Повний текст джерелаPomerancevs, Juris. "Geothermal function integration in ice rinks with CO2 refrigeration system." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-273166.
Повний текст джерелаIshallar är energikrävande industriella applikationer. En typisk ishall i Sverige använder cirka 1000 MWh / säsong. Ett toppmodernt ishallsystem kan använda mindre än 500 MWh / säsong, vilket indikerar stora förbättringsmöjligheter. Enligt flera undersökningar har CO2-kylsystem med värmeåtervinning visat sig vara energieffektivt och kostnadseffektivt i ishallar.För att ytterligare förbättra effektiviteten kan geotermisk funktion läggas till. Syftet med denna studie är att utvärdera den geotermiska funktionen ur ett tekno-ekonomiskt perspektiv för en typisk ishall i Sverige. En modellering av flera scenarier har utförts. Resultaten antyder att CO2-kylsystem med 2-steg värmeåtervinning, om det uppgraderas med geotermisk funktion, kan spara mellan 1,7 och 6,8% energi årligen. I bästa fall antyder denna studie att den geotermiska funktionen skulle betala tillbaka om 16,4 år.
Atkinson, Trevor Alex. "Geochemical Characterization of the Mountain Home Geothermal System." DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4599.
Повний текст джерелаFisher, Kevin Perry. "A case study to identify and evaluate the pricing policy for geothermal energy in the San Bernardino Municipal Geothermal District heating system." CSUSB ScholarWorks, 1989. https://scholarworks.lib.csusb.edu/etd-project/532.
Повний текст джерелаCorr, Mandi Lee. "Renewable energy in Montana system applications and technlogy /." [Missoula, Mont.] : The University of Montana, 2008. http://etd.lib.umt.edu/theses/available/etd-04212009-123850/unrestricted/Mandi_Corr_Thesis.pdf.
Повний текст джерелаBARALIS, MATTEO. "Optimisation of geothermal resources in urban areas." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2842491.
Повний текст джерелаLundin, Rasmus, and Benjamin Beitler-Dorch. "Modelling and Analysis of Mobile Energy Transmission for Offshore Wind Power : An analysis of flow batteries as an energy transmission system for offshore wind power." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-40082.
Повний текст джерелаIlisei, Gheorghe. "Numerical analysis using simulations for a geothermal heat pump system. : Case study: modelling an energy efficient house." Thesis, Högskolan i Gävle, Energisystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29101.
Повний текст джерелаThe presentation was made via Skype due to the programme being online based
Beyene, Mussie Abraham. "Modelling the Resilience of Offshore Renewable Energy System Using Non-constant Failure Rates." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445650.
Повний текст джерелаAlshareef, Ahmed Shehab. "Technology Assessment Model of Developing Geothermal Energy Resources for Supporting Electrical System: the Case for Oregon." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3515.
Повний текст джерелаYekoladio, Peni Junior. "Thermodynamic optimization of sustainable energy system : application to the optimal design of heat exchangers for geothermal power systems." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/31615.
Повний текст джерелаDissertation (MEng)--University of Pretoria, 2013.
Mechanical and Aeronautical Engineering
unrestricted
Eriksson, Douglas. "Investigation of the energy saving potential for an office building complex : A study on the viability of an on-site combined heat- and power supply system." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-39888.
Повний текст джерелаVedin, Felix. "System analysis of a fossil free steel manufacturing plant powered by an offshore wind power farm." Thesis, KTH, Kraft- och värmeteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299938.
Повний текст джерелаDet sker stora förändringar inom Sveriges elkraftsystem och stålindustri. Den nuvarande regeringen har genom politiska överenskommelser satt nationella mål på 100% förnybar elproduktion, och nollnetto GHG utsläpp inom industrin, tills 2040. Det ska nås genom att öka förnyelsebar elproduktion, huvudsakligen vindkraft. I stålindustrin har ståltillverkningskoncernerna börjat övergå till en elektrifierad ståltillverkningsprocess för att minska utsläppen. Den svenska stålkoncernen SSAB, och gruvdriftskoncernen LKAB, tillsammans med Vattenfall utvecklar en alternativ ståltillverkningsprocess som är fri från fossila källor. Det heter HYBRIT, och är en alternativ metod för att reducera järnmalm med vätgas, i stället för kol som används idag. Genom att producera vätgas med elektrolys, installera vätgasreduktionsteknik, och ersätta de koldrivna masugnarna med eldrivna ljusbågsugnar för att smälta stålet, är det möjligt att skapa en grön och miljövänlig stålindustri. Denna teknik simulerades i en datormodell där elektricitetsflöden och begränsningarna på kapaciteten på systemkomponenterna beräknades. Simuleringen gjordes på ett existerande stålverk i Oxelösund. Ett hypotetiskt fall sattes upp där verket har inkorporerat hela HYBRIT stålproduktionskedjan. Den huvudsakliga kraftkällan var en närliggande havsbaserad vindkraftspark som är ett föreslagit projekt av Svea Vind Offshore. Tidigare studier har simulerat ståltillverkning med HYBRIT teknik i datamodeller. Men, det finns ingen liknade studie som har studerat hur dessa system fungerar med en varierande tillgänglighet på förnyelsebar effekt. Utifrån två studerade vindkraftsparkdesigner blev resultatet en relation mellan den behövda elektrolyskapaciteten som en funktion av andelen återvunnet stål i processen samt det årliga stålproduktionsbehovet. Genom att använda SSAB:s framtida mål där de använder 50% återvunnet stål som referens, beräknades det att 286 – 309 MW elektrolysenheter behövs för en årlig produktion på 1.6 millioner ton stål.
Gross, Paul A. II. "Commercial Program Development for a Ground Loop Geothermal System: Energy Loads, GUI, Turbulent Flow, Heat Pump Model and Grid Study." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1324258915.
Повний текст джерелаFaley, Katherine A. "Control System Design for Offshore Wind Turbines Under Extreme Icy/Tide-Variable Weather Conditions." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1321990494.
Повний текст джерелаRahm, Magnus. "Ocean Wave Energy : Underwater Substation System for Wave Energy Converters." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-112915.
Повний текст джерелаPerez-Collazo, Carlos. "Evaluation of the WEC sub-system of a hybrid wind-wave energy converter." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9485.
Повний текст джерелаFredriksson, Victor, and Bane Gluhajic. "Heating systems in small houses : A comparison between geothermal heating and district heating." Thesis, KTH, Byggteknik och design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-253799.
Повний текст джерелаFjärrvärme och bergvärme är idag två etablerade värmesystem som ofta ställs mot varandra. Syftet med det här arbetet är att redogöra vilka faktorer som påverkar valet av värmesystem under projekteringsstadiet och vilka kostnaderna som finns för respektive system. I arbetet har en typisk husmodel tagits fram och använts som grund för jämförelsen av båda systemen. Jämförelsen har dels gjorts i form av energiberäkningar i energiberäkningsprogrammet BV2 där värmebehov och myndighetskrav på energiprestanda har jämförts i olika geografiska områden i Sverige. Vidare har kostnadsberäkningar genomförts utifrån energiberäkningarnas resultat där investeringskostnader och årliga kostnader har ställts mot varandra. Resultatet av arbetet visar hur måttet på energiprestanda skiljer sig från den faktiska mängden köpt energi på grund ut av geografiska förhållanden. I de södra delarna i Sverige där den geografiska korrigeringsfaktorn understiger 0 straffas konsumenter genom att primärenergitalet höjs, till skillnad mot de norra delarna där primärenergitalet istället sänks. Utifrån kostnadsberäkningarna kan man dra slutsatsen att fjärrvärme, när den finns tillgänglig, är mer ekonomiskt fördelaktigt på kort sikt. Bergvärme å andra sidan är ett mer lönsamt alternativ på lång sikt.
Alghamdi, Jamal Khaled. "CFD Simulation Methodology for Ground-Coupled Ventilation System." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35736.
Повний текст джерелаMaster of Science
Castellucci, Valeria. "Sea Level Compensation System for Wave Energy Converters." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-295603.
Повний текст джерелаChavarria, Dana, Rubi Ramos, and Carlos Raymundo. "Development of a hybrid heating system based on geothermal–photovoltaic energy to reduce the impact of frosts on inhabitants of rural areas in the ring of fire, southern Peru." Springer Science and Business Media Deutschland GmbH, 2019. http://hdl.handle.net/10757/656249.
Повний текст джерелаThe recent climate change has forced people to live in extreme conditions, either excessive heat or cold, implying that they must adapt to survive in these situations. However, there are people who, because of their geographical condition and lack of resources, lack the means and tools to combat these climate changes. The context of this study is provided in a rural town located in the Arequipa region (Peru), whose inhabitants have to fight against frosts of up to −20 °C in an area without electricity. A viable solution to this problem is found through the design and implementation of a heating system using geothermal and photovoltaic energy, which are resources found in the area, according to a report of the Ministry of Energy and Mines. This study analyzes and researches the geographical and meteorological conditions of the region, for validating, through theory and simulations, whether the proposed system can supply the thermal energy required to maintain the indoor temperature at a minimum of 15 °C under extreme conditions. The system is designed after analyzing the best technological options and techniques currently available in the context studied for its ultimate financing and establishing guidelines and indicators for monitoring results.
Charoenvisal, Kongkun. "Energy Performance and Economic Evaluations of the Geothermal Heat Pump System used in the KnowledgeWorks I and II Buildings, Blacksburg, Virginia." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/33942.
Повний текст джерелаIn collaboration with the Virginia Tech Corporate Research Center, Inc., this research studies the energy consumption and cost benefits of the Geothermal Heat Pump System that has been integrated and operated in the KnowledgeWorks I and II buildings located on the Virginia Tech campus.
The purpose of this thesis is to understand the energy and cost benefits of the Geothermal Heat Pumps System when compared to the conventional package variable air volume (VAV) with hot water coil heating and air-source heat pump systems using computer simulation and statistical models. The quantitative methods of building energy performance and life-cycle cost analyses are applied to evaluate the results of simulation models, the in-situ monitoring data, and the associated documents. This understanding can be expanded to the higher level of architectural systems integration.
Master of Science
Heidari, Shayan. "Economic Modelling of Floating Offshore Wind Power : Calculation of Levelized Cost of Energy." Thesis, Mälardalens högskola, Industriell ekonomi och organisation, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36130.
Повний текст джерелаAlfadil, Mohammad Omar. "Design Tool for a Ground-Coupled Ventilation System." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/100604.
Повний текст джерелаDoctor of Philosophy
Jonsson, Forsblad Nils. "Evaluating the Potential for Floating Offshore Wind Power in Skagerrak : The Golden Triangle." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-303672.
Повний текст джерелаLindroth, [formerly Tyrberg] Simon. "Buoy and Generator Interaction with Ocean Waves : Studies of a Wave Energy Conversion System." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160085.
Повний текст джерелаKaramanov, Anton. "Utilization of Horizontal-Axis Tidal Stream Turbines As a Main Power Supply System On Offshore Remote Oil&Gas Platforms." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263161.
Повний текст джерелаMagisteruppsatsen innehåller 97 sidor, 29 tabeller, 33 figurer och 43 litteraturkällor. I papperet presenteras en studie om att effektiviteten i kraftförsörjningen av avlägsna offshore olje- och gasanläggningar ökar genom användning av horisontella axiella tidvattenströmsturbiner. En generell teoretisk beskrivning av flytande halvdämpbara borriggar och en mer detaljerad beskrivning av semi-submersible borrningsenhet 6000/200 typ "Hylla" presenteras. En teoretisk beskrivning av olika anordningar som omvandlar den kinetiska energin hos vatten till elkraft presenteras också, och horisontella axiella tidvattenströmsturbiner behandlas mer detaljerat. Den tekniska beräkningen för att bestämma parametrarna för turbiner utförs. Beräkningen användes för det fall där en eller flera turbiner används. Ekonomisk analys utfördes med olika indikatorer, nämligen: priset på dieselbränsle, priset på utrustning, belastningsfaktorn för hydrageneratorer, diskonteringsräntan och borrningens produktivitet. En analys av minskningen av koldioxidutsläpp gjordes också. Slutsatser presenterades om effektiviteten av införandet av denna metod för energiförsörjning.
Savin, Andrej. "Experimental Measurement of Lateral Force in a Submerged Single Heaving Buoy Wave Energy Converter." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-159519.
Повний текст джерелаWoolley, O. A. "Developing a system of ecological governance : a legal framework for determining offshore wind energy’s role in the formation and implementation of an ecologically coherent energy policy." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1344104/.
Повний текст джерелаPaniah, Crédo. "Approche multi-agents pour la gestion des fermes éoliennes offshore." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112067/document.
Повний текст джерелаRenewable Energy Sources (RES) has grown remarkably in last few decades. Compared to conventional energy sources, renewable generation is more available, sustainable and environment-friendly - for example, there is no greenhouse gases emission during the energy generation. However, while electrical network stability requires production and consumption equality and the electricity market constrains producers to contract future production a priori and respect their furniture commitments or pay substantial penalties, RES are mainly uncontrollable and their behavior is difficult to forecast accurately. De facto, they jeopardize the stability of the physical network and renewable producers competitiveness in the market. The Winpower project aims to design realistic, robust and stable control strategies for offshore networks connecting to the main electricity system renewable sources and controllable storage devices owned by different autonomous actors. Each actor must embed its own local physical device control strategy but a global network management mechanism, jointly decided between connected actors, should be designed as well.We assume a market participation of the actors as an unique entity (the coalition of actors connected by the Winpower network) allowing the coalition to facilitate the network management through resources aggregation, renewable producers to take advantage of controllable sources flexibility to handle market penalties risks, as well as storage devices owners to leverage their resources on the market and/or with the management of renewable imbalances. This work tackles the market participation of the coalition as a Cooperative Virtual Power Plant. For this purpose, we describe a multi-agent architecture trough the definition of intelligent agents managing and operating actors resources and the description of these agents interactions; it allows the alliance of local constraints and objectives and the global network management objective.We formalize the aggregation and planning of resources utilization as a Markov Decision Process (MDP), a formal model suited for sequential decision making in uncertain environments. Its aim is to define the sequence of actions which maximize expected actual incomes of the market participation, while decisions over controllable resources have uncertain outcomes. However, market participation decision is prior to the actual operation when renewable generation still is uncertain. Thus, the Markov Decision Process is intractable as its state in each decision time-slot is not fully observable. To solve such a Partially Observable MDP (POMDP), we decompose it into a classical MDP and an information state (a probability distribution over renewable generation errors). The Information State MDP (IS-MDP) obtained is solved with an adaptation of the Backwards Induction, a classical MDP resolution algorithm.Then, we describe a common simulation framework to compare our proposed methodology to some other strategies, including the state of the art in renewable generation market participation. Simulations results validate the resources aggregation strategy and confirm that cooperation is beneficial to renewable producers and storage devices owners when they participate in electricity market. The proposed architecture is designed to allow the distribution of the decision making between the coalition’s actors, through the implementation of a suitable coordination mechanism. We propose some distribution methodologies, to this end
Strömstedt, Erland. "Submerged Transmission in Wave Energy Converters : Full Scale In-Situ Experimental Measurements." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-179740.
Повний текст джерелаPublished is a preprint version of the full text and should be combined by the errata.
The Lysekil Wave Power Project
NOVO, RICCARDO. "Setting-up the decarbonisation of islands: models and technologies for the energy transition." Doctoral thesis, Politecnico di Torino, 2022. https://hdl.handle.net/11583/2972786.
Повний текст джерелаPitron, Jiří. "Možnosti využití alternativních decentralizovaných zdrojů energie." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220682.
Повний текст джерелаÖhlund, Martin. "Ekonomisk Optimering av Systemtemperaturer i Radiatorsystem." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176210.
Повний текст джерелаThe choice of temperatures in heating systems has long been a question for debate in Sweden. For the design engineer, the choice of system temperatures in a heating system has a decisive impact on the cost and in order to stay competitive on the market it is crucial to design the heating system as cost effective as possible. Historically the system temperature in Swedish heating systems has been 80/60 but today we see that the most common temperatures are 55/45. During the 1960´s Östen Sandberg became the leading advocate for a new type of heating system using a low flow principle (LF) for heat distribution. The LF principle requires a larger temperatur difference between the supply and return temperatures for the adequate heating. Advocates of the LF principle claims that large energy savings are possible if an exsisting high flow heating system (HF) undergoes an adjustment to a LF heating system. The question is how accurate is this claim? This article shows many advantages with the nowadays common 55/45-HFsystem. A 55/45-HFsystem has relatively low investment costs in comparison with other types of heating systems. Another advantage is the fact that the 55/45-HFsystem is compatible with both district heating and geothermal heat pump heating systems which makes this radiator system suitable as a standardized system. The most economical radiator system is the 80/60-HFsystem, which has a lower investment cost for both radiators and piping in comparison with a 55/45-HFsystem. The claim that LFsystems and the associated LF principle could result in a reduced energy cost for the heating system was not supported. This article shows that the energy savings that comes from the LF principle is negligible in comparison with the heating systems total energy cost. The LF principle could however reduce the risk of an uneven heating distribution in the building due to a more unpredictable regulation of the flow through the radiators. LFsystem disadvantage is an general overall larger investment cost in comparison with a HFsystem.
Condemarin, Valverde Roberto Carlos, and Gonzales Jesús Alessandro Alvarado. "Guía de aplicación de cimentaciones termoactivas para fomentar el aprovechamiento de energía geotérmica de baja entalpia en edificaciones." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/655251.
Повний текст джерелаThe use of renewable energies is rare in the country, so it is important that the technologies associated with the use of this type of resources be disseminated. Surface geothermal energy is a resource that can be used practically throughout the earth's crust, it does not provide a high amount of energy but it does have applications that reduce CO2 production (by heating systems) and energy consumption. The research analyzes low enthalpy geothermal systems, specifically thermoactive foundations, which consist of incorporating the heat exchanger in the foundation structure, this together with the heat pump and the distribution system constitutes an important use of shallow geothermal energy in building heating systems. To develop thermoactive foundations it is necessary to carry out previous studies such as a study of the geotechnical and thermal characteristics of the soil, hydrogeology and geology.
Tesis
Ercolanelli, Julien. "Étude numérique et expérimentale d'un système couplé stabilisateur et récupérateur d'énergie des vagues Experimental and numerical investigation of sloshing in anti-roll tank using effective gravity angle Experimental and numerical assessment of the performance of a new type passive anti-roll stabilisation system." Thesis, Brest, École nationale supérieure de techniques avancées Bretagne, 2019. http://www.theses.fr/2019ENTA0008.
Повний текст джерелаGeps Techno's development is based on an innovative concept of a floating structure intended to produce electrical energy from several renewable marine energy sources, including wave power. The wave power system developed by Geps Techno is based on circulating water and creating a vortex within it. By taking advantage of the liquid hull phenomenon, the concept can also be used as a stabilization system for a ship or any other floating platform. The short-term objective of the company is the development of this technology allowing the stabilization and recovery of wave energy and for which there remain technological obstacles to be removed in order to achieve the viability and profitability of the system. To do this, in October 2015 Geps Techno launched the IHES (Integrated Harvesting Energy System) project, which consists of building a demonstrator of its wave power platform concept. The IHES project is one of the projects of the roadmap of the "Ecological ships" plan of New Industrial France. It is supported by Bpifrance within the framework of the Investments for the Future - Industrial Projects for the Future program. In order to master the objectives of stabilization and energy recovery, Geps Techno is studying the technological aspects necessary to switch from the energy available at wave level to that available at the wave turbine turbine. The Ph.D. thesis work supported by Fourestier in May 2017 focused on a first part "Definition and control of internal flows in the wave power system". Using CFD modeling, the latter resulted in operational models characterizing internal flows. This Cifre Ph.D. thesis follows on from Fourestier's work and deals with a second part "Modeling of the coupled platform / wave power system". All of this work should lead to an operational computer code correlated with experimental results making it possible to study the internal flow and the behavior of the float subjected to swell
Honnanayakanahalli, Ramakrishna Prajwal. "MODELING, SIMULATION AND OPTIMIZATION OF A SUBMERGED RENEWABLE STORAGE SYSTEM INTEGRATED TO A FLOATING WIND FARM : A feasibility case study on the Swedish side of the Baltic sea, based on the geographical and wind conditions." Thesis, Mälardalens högskola, Framtidens energi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-42321.
Повний текст джерелаFabbri, Julius. "Contributo di dati di gravità nella valutazione del vulcanismo CAMP in Africa Nord-Occidentale." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10927.
Повний текст джерелаLa domanda alla base di questa ricerca è stata se il metodo della gravimetria satellitare possa essere utilizzato per seguire le unità geologiche anche in luoghi difficilmente accessibili. L’obiettivo di questa ricerca è di verificare se le missioni satellitari di nuova generazione permettano di identificare la più grande delle province ignee della Terra (Bertrand et al., 2013), nota come CAMP (Central Atlantic Magmatic Province) in Africa nord-occidentale. Oltre alle motivazioni scientifiche, una possibile applicazione è l’esplorazione di risorse minerarie e lo sfruttamento di energia geotermica. Tale provincia ignea è una LIP (Large Igneous Province) che si estende in Nord e Sud America, Atlantico, Europa ed Africa (istituita in Marzoli et al. 1999). Essa si è sviluppata a seguito della frammentazione del super-continente Pangea al limite Triassico-Giurassico, ca. 200 Ma fa. A causa probabilmente del riscaldamento globale del mantello e/o dalla convezione dello stesso innescata da dislivelli di blocchi litosferici, dai dicchi-sorgente si produssero i cosiddetti basalti da flusso e si verificò un intenso vulcanismo con imponenti colate laviche tali da suggerire a taluni ricercatori che gli elementi volatili presenti nel magma abbiano contribuito ad aumentare i gas serra con conseguenze nel clima globale e nelle estinzioni di massa. I depositi in esame sono costituiti da lave, tholeiti continentali, doleriti, basalti e gabbri. Ciò che rimane di questa attività vulcanica sono dicchi singoli o in sciami, batoliti, sill, colate laviche e plateau basaltici (nei fondali oceanici). L’Africa nord-occidentale è costituita principalmente da un cratone composto da rocce molto antiche dell’Archeano (3000-2500 Ma). Esso emerge a nord nello scudo Reguibat e, a sud, la dorsale dell’Uomo o del Leone (Lucazeau et al., 1991). Il cratone è circondato dalle zone di geosutura (greenstone e cinture mobili) associate al cosiddetto evento termo-tettonico Pan-Africano, verificatosi ca. 650 Ma fa con l’assemblaggio del continente africano da blocchi crostali più piccoli. Nelle Mauritanidi affiora il basamento ercinico (ca. 350 Ma) mentre negli Atlas e nelle Magrebidi prevalgono rocce più recenti connesse all’orogenesi alpina (0-150 Ma). Al centro del cratone si trova il bacino paleozoico Taoudenni che riempie una vasta area depressa. Tutto il territorio in esame è caratterizzato da una forte presenza di rocce metamorfiche dense e magmatiche di ogni età, con presenza di più di un “punto caldo” che potrebbe essere definito un terreno igneo (Bryan et al. (2008) con più LIP spesso sovrapposte o limitrofe. Mediamente, tutte queste rocce magmatiche e metamorfiche hanno una densità di 3000 kg/m3 (Kröner, 1977 ), maggiore di quella della crosta standard e dei sedimenti. Particolare attenzione è stata dedicata ad un lineamento tettonico noto come Pelusium Megashare System (PMS) che attraversa tutta l’Africa nord-occidentale (Neev et al., 1982) chiaramente visibile in tutte le immagini satellitari di Google Earth ma che è riportato solo in pochissime pubblicazioni. Per la prima volta in questa tesi si ipotizza un collegamento tra la CAMP e PMS. La gravimetria satellitare consente di rilevare variazioni di densità nella crosta terrestre. Ove vi sono rocce più dense, il segnale rilevato (detto anomalia gravimetrica) è positivo e viceversa. La gravimetria da satellite si è rivelata un valido strumento per identificare le aree con surplus di massa. La risposta all’interrogativo iniziale è dunque affermativa anche se, da quanto esposto, risulta difficile o impossibile associare ad un certo segnale positivo una data LIP. L’elaborazione dei segnali è avvenuta partendo dai dati del satellite GOCE (ultima generazione, a un’orbita di 250 km ma già ammarato) e GRACE (obsoleto ma tuttora in orbita a ca. 450 km). I dati utilizzati sono dei modelli del campo di gravità terrestre che contengono i coefficienti di Stokes per lo sviluppo in armoniche sferiche del potenziale. I modelli utilizzati sono l’EGM2008 (comprendente anche dati di terra, con risoluzione massima 10 km se sviluppato al massimo ordine di 2159) e GOCO TIM R4 (con una risoluzione massima di 80 km, la migliore mai ottenuta da dati satellitari globali). Il modello EGM2008 è stato sviluppato fino all’ordine e grado 720 per eliminare dati spuri (Pavlis, 2012) e, in tal modo, ha permesso di raggiungere una risoluzione di ca. 27 km se si considera metà lunghezza d’onda. Dopo il controllo della qualità dei dati, essi sono stati elaborati nel seguente modo, come esposto nei capitoli 2, 3 e 4. Ai dati grezzi sono state applicate tre riduzioni per sottrarre gli effetti di gravità indesiderati che mascherano il segnale cercato più debole. È stato sottratto l’effetto di gravità della topografia, dei sedimenti e dell’interfaccia crosta-mantello (ICM). Partendo dall’anomalia “in aria libera” (FA), è stata quindi ottenuta l’anomalia di Bouguer (BA) e la BA corretta per i sedimenti. Poi, calcolata la Moho (ICM) isostatica, si è prodotto il residuo isostatico corretto per i sedimenti. I campi elaborati sono la gravità gz (espressa in milli Gal, mGal) ed il gradiente Tzz (misurato in Eötvös, E). Sono state usate le risoluzioni di 0.5° e di 0.05°, computati ad una quota di 4000 m s.l. m perché maggiore del più altro rilievo montuoso dell’area. Dopo aver modellato dei casi a geometria semplice (cap. 6) si è passati alla modellizzazione di tre casi reali. I tre siti scelti per l’approfondimento sono: Tindouf (Algeria), Taoudenni (Mali), Timbuktu (Mali). Nel bacino di Tindouf un sill doleritico CAMP è annesso al suo probabile dicco-sorgente reso evidente dalla gravimetria che identifica bene anche una vicina miniera di Ferro. Nel bacino Taoudenni, le due anomalie principali suggeriscono la presenza di cumuliti magmatici spessi una dozzina di chilometri e connessi con la superficie attraverso dicchi obliqui. Il sito presso Timbuktu è trattato nel dettaglio perché al di sotto del vicino lago Faguibine è stata rivelata un’intrusione magmatica lunga ca. 250 km. In superficie vi sono evidenze di magmatismo (per es. fumarole) tali da preoccupare le popolazioni locali (El Abbass et al., 1993). Tra i risultati inaspettati, si ricorda il forte segnale gravimetrico generato dalle peridotiti in Marocco ed un’importante anomalia (80 mGal) nel Grand Erg Occidental (Algeria) al di sotto del Sahara che sembrerebbe essere causata da un corpo denso lungo ca. 600 km.
The question behind this research was whether the method of satellite gravimetry can be used to follow the geological units even in inaccessible places. The goal of this research is to verify if the new generation of satellite missions serve to identify the largest of the Earth's igneous provinces (Bertrand et al., 2013), known as CAMP (Central Atlantic Magmatic Province) in Northwest Africa . Besides the scientific reasons, a possible application is the exploration of mineral resources and the exploitation of geothermal energy. This is an igneous province (LIP Large Igneous Provinces) that extends throughout North and South America, the Atlantic Ocean, Europe and Africa (established in Marzoli et al. 1999). It developed as a result of the fragmentation of the super-continent Pangea at Triassic-Jurassic limit, ca. 200 My ago. Probably because of mantel global warming and/or its convection triggered by differences in thickness of lithospheric blocks, from source-dikes were produced the so-called continental flow basalts (CFB) and there was an intense volcanism with massive lava flows that this would suggest to certain researchers volatile elements present in the magma have contributed to increasing greenhouse gases with consequences in the global climate and mass extinctions. The deposits in question consist of lavas, tholeites continental dolerites, basalts and gabbros. What remains of this volcanic activity are individual dykes or in swarms, batholiths, sills, lava flows and basaltic plateau (in the ocean). The north-western Africa consists mainly of a craton made of most ancient rocks dell'Archean (3000-2500 Ma). It emerges in the shield Reguibat north and on the south, the Man or the Lion shield (Lucazeau et al., 1991). The craton is surrounded by areas of geosutura (greenstone belts and mobile belts) associated with the so-called Pan-African thermo-tectonic event, occurred ca. 650 Ma ago with the assembly of the African continent by smaller crustal blocks. Mauritanides emerges in the Hercynian basement (ca. 350 Ma) while in the Atlas and Magrebides prevail younger rocks (Alpine orogenesis, 0-150 Ma). At the center of the craton is the Paleozoic basin Taoudenni that fills a large area depressed. All the territory concerned is characterized by a strong presence of dense magmatic and metamorphic rocks of all ages, with the presence of more than a "hot spot" that could be called “igneous terrane” (Bryan et al. (2008) with more LIPs overlapping or adjacent. On average, these igneous and metamorphic rocks have a density of 3000 kg / m3 (Kröner, 1977), greater than that of the standard crust and the sediments. Particular attention was dedicated to a tectonic lineament known as Pelusium Megashare System (PMS) that runs through the north-western Africa (Neev et al., 1982) clearly visible in all the satellite images of Google Earth but is reported only in very few publications. For the first time this thesis suggests a link between CAMP and PMS. Satellite gravimetry can detect density variations in the Earth's crust. Where there are rocks denser, the detected signal (called gravity anomaly) is positive and vice versa. The gravimetry by satellite has proved a valuable tool to identify areas with surplus Mass. The initial response to the question is therefore affirmative although, from the above, it is difficult or impossible to associate a positive signal a date LIP. Signals processing occurred from the data of the GOCE satellite (last generation, in an orbit of 250 km, mission already finished) and GRACE (obsolete but still in orbit at ca. 450 km). The data used are the models of the Earth's gravity field containing the coefficients of Stokes for the development of potential in spherical harmonics. The models used are the EGM2008 (also including land data, with a maximum resolution 10 km if developed to the maximum order of 2159) and TIM GOCO R4 (with a maximum resolution of 80 km, the best ever obtained by global satellite data). The model EGM2008 has been developed up to the order and degree 720 to remove spurious data (Pavlis, 2012) and, thus, allowed to reach a resolution of ca. 27 km considering half wavelength. After quality control of the data, they were processed in the following flowchart, as discussed in Chapters 2, 3 and 4. Raw data were processed applying three reductions to subtract the effects of gravity that mask the signal. It was reduced by the effect of gravity of the topography, sediment and crust-mantle interface (CMI). Starting by the anomaly "free air" (FA), was thus obtained the Bouguer anomaly (BA) and BA correct for sediment. Then, once calculated the isostatic Moho (CMI), has produced the sediment-corrected-isostatic residual. The fields processed are gravity gz (in milli Gal, mGal) and gradient tzz (measured in Eötvös, E). It has been used the resolutions of 0.5 ° and 0.05 °, computed at an altitude of 4000 m a.s.l., higher of mountains in the area. After mng cases with simple geometry (ch. 6) we moved to the modeling of three real case histories. The three sites chosen for the study are: Tindouf (Algeria), Taoudenni (Mali), Timbuktu (Mali). In the basin of Tindouf a CAMP doleritic sill is attached to its likely source source-dyke evident by gravimetry that identifies well a nearby mine of Iron. In the Taoudenni basin, the two main anomalies suggest the presence of magmatic cumulites a dozen kilometers thick and connected with the surface through oblique dikes. The site at Timbuktu is discussed in detail because in the nearby lake Faguibine was revealed a magmatic intrusion long ca. 250 km. On the surface there is evidence of magmatism (e.g. Fumaroles) such that worry local populations (El Abbass et al., 1993) .Among the unexpected results, please note the strong signal generated by gravimetric peridotites in Morocco and a major anomaly (80 mGal) in the Grand Erg Occidental (Algeria) below the Sahara that would seem to be caused by a dense body ca. 600 km long.
XXVI Ciclo
1972
Lu, Wen-Tien, and 盧文添. "Performance Analysis of District Geothermal Energy Cogeneration System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/z3jfj6.
Повний текст джерела國立臺北科技大學
能源與冷凍空調工程系碩士班
97
Due to the limited indigenous resources in Taiwan, most energy resource are relied and imported from other countries. In addition, people are aware of carbon dioxide reducing and also the importance of clean renewable energy. With the inefficiency of the traditional fossil fuel systems and the pollutant emission, we need to look for any clean energetic system. Traditional refrigeration and air-conditioning are vapor compression refrigeration cycle that not only causes an enormous amount of electrical energy but leads to ozone-depleting and the global warming by releasing synthetic refrigerant substances. The reason why we need to seek the alternative refrigerant or even other energy lies in driven refrigeration and air-conditioning system. Because of the abundance of natural geothermal resources in Taiwan, the thesis presents mainly on(1)Using low temperature geothermal energy to drive LiBr/H2O absorption system and analyze the performances of it. Furthermore, this thesis compares primary energy ratio (PER) and carbon dioxide emission of the various energy-driven absorption systems.(2)Using high temperature geothermal energy to drive district cogeneration system that provides thermal energy, electricity and cooling energy to the residence of the region. Analyze the geothermal energy cogeneration system with thermodynamic first and second laws, showing the analysis of the energy losses and efficiency of each subsystem and entire cogeneration system. Therefore, the results of this research can be used to improve the further systematical performance and achieve optimum of district geothermal energy cogeneration system.
Lin, Ting-Yi, and 林庭毅. "Shallow Geothermal Energy Applied to Air Conditioning System Cooling." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/vr4376.
Повний текст джерела國立臺灣大學
機械工程學研究所
105
Traditional air-conditioning cooling systems usually use cooling tower to dissipate condense heat into outdoor air. However, the outdoor temperature and humidity, which vary over time, limit the cooling performance of cooling tower. Furthermore, the use of cooling tower has many disadvantages such as noise, vibration, and also providing a proper environment for bacteria breeding. Therefore, the aim of this thesis is to replace cooling tower system with a new cooling system—the shallow geothermal cooling system. This new cooling system dissipates condense heat into the shallow ground. Because of having a relatively small temperature variation, the shallow ground can be a stable heat sink for air-conditioning cooling.In this study, we used two types of shallow geothermal cooling system: groundwater borehole and raft foundation water. According to the experiment results, the groundwater cooling system could stably cool the condenser and reached thermal equilibrium state, but the temperature of raft foundation water was continuously rising during operation. Therefore, the groundwater cooling system can be a proper alternative for replacing cooling tower system. On the other hands, the raft foundation water cooling system could be another choice through optimized operating method.
Weng, Sheng-Yang, and 翁聖揚. "The simulation and analysis of energy saving EAHE system using shallow geothermal energy." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/c44e2g.
Повний текст джерела國立臺灣大學
機械工程學研究所
107
The earth air heat exchanger (EAHE) is a low-energy ventilation technique using the stable temperature of earth. In the past decade, many experimental studies deal with the performance evaluation of EAHE system worldwide; however, in Taiwan these kinds of researches are still uncommon. This research focus on the performance of soil-based EAHE and water-based EAHE using numerical methods. Soil-based EAHE includes 4 PVC air pipes each with 52.95m in length, 0.15m in diameter and buried 4.7m beneath ground surface. Its arranged ventilation is 3150 CMH, working 9 a.m. to 9 p.m. Water-based EAHE consists of 3 PVC air pipes each with 75m in length, 0.15m in diameter and buried 9.5m underground. Its arranged ventilation is 990 CMH, working 9 a.m. to 9 p.m. This research uses ANSYS Fluent for simulating various system status over time. Initial conditions are ventilation, seasonal introduced air temperatures and seasonal introduced air humidity. After simulation, EAHE system’s seasonal outlet temperature, outlet humidity, heat transfer rates, temperature distributions in raft foundation water and soil of 2 meters around air pipes can be generated. Through heat transfer rates, seasonal energy saving efficiency can be recognized, such as cooling load in summer and heating load in winter, as well as the percentage of latent heat transfer rates through the examination of humidity difference. This analysis benefits future applications for selecting suitable areas to adjust and improve the energy saving efficiency of EAHE systems. By analyzing raft foundation water temperature distribution, the range of water affected by EAHE and its most efficient operating period can be recognized to maintain stable water temperature and its heat transfer rate for preserving EAHE’s energy saving efficiency. Through analyzing surrounding soil temperature distribution, the range and extent of soil affected by EAHE can be realized. Selecting suitable soil allows soil to maintain its stable temperature, heat transfer rates and its self-recovering ability to sustain EAHE’s energy saving efficiency. From simulation results, the influence of pipe materials, such as stainless steel, copper, aluminum and PVC on the performance of EAHE can be known, thus suitable pipe materials can be determined. From temperature distribution of introduced air within air pipes, effective length for regulating can be discerned for future applications. Besides, although increasing airflow velocities promotes heat transfer rates, heat exchange time between introduced air and air pipes also decreases. Therefore, through simulation, the optimal airflow velocities are discovered. Airflow velocities of 2m/s, 5 m/s, 9 m/s and 12 m/s are considered in this research. Finally, the influence of water temperature 21℃, 23℃, 25℃ and water storage of full, 0.75-full, half-full on the performance of EAHE and recovery during shut down period is discussed. By the simulation with mentioned settings, systems’ seasonal air regulation, energy saving efficiency, efficient operating period, influence of pipe materials, effective length, affected range of surrounding soil and water, suitable soil types, appropriate airflow velocities, the influence of water temperature and water storage can be acknowledged.
Ganguly, Sayantan. "Analytical and Numerical Modeling for Heat Transport in a Geothermal Reservoir due to Cold Water Injection." Thesis, 2014. http://etd.iisc.ernet.in/handle/2005/2994.
Повний текст джерелаKung, Chung-Kuan, and 龔仲寬. "Simulation of Energy Consumption and Optimization Control of Geothermal Heat pump System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/02490080801515725522.
Повний текст джерела國立臺灣大學
機械工程學研究所
100
The purpose of this dissertation is to investigate the optimal design of geothermal heat pump. This dissertation experimentally and mathematically investigates the performance of the geothermal heat pump system which consists of a heat pump and a borehole heat exchanger. Furthermore, optimal method for analyzing the cost influences of the life cycle of the system were developed based on different operation strategies and the capacity of the equipment (combination of heat pumps and borehole heat exchangers). For the performance of the heat pump system, the comparison between the mathematical modeling and the experimental approaches are identical. The relation of correlation R2 is about 0.9867. On the contrary, the capability of the borehole heat exchangers was investigated. The variation of the water temperature inside the cylindrical tube and the outlet water temperature in the spiral pipe were solved by using the thermal resistance method. The result shows that the error of the temperature for spiral pipe outlet and water temperature inside the cylindrical tube with compare to the mathematical model is 0.31% and 3.12%. While in the optimum design, it compares the performances of four updating rules of the particle swarm optimization (PSO) through applying five mathematic problems. The linear-decayed inertia weight method is favorable for this study because stability of solutions can be obtained. This dissertation also developed a solution for the discrete problem of the on-off system in the water pump and heat pump by using PSO with Roulette Wheel Method. Finally a case study was conducted. The geothermal heat pump system was developed in a factory in order to obtain the optimization. The primary parameters include the turn-off states of heat pump and water pump, the heat pump capacity, the UA of heat exchanger, the initial cold and heat water temperature and the capacity of cold and heat tank. The results indicated that the cost of life cycle of the geothermal heat pump system can be reduced by NT 1,446,552, the ratio of energy saving is 56.23%. The energy consumption decrement is 965,756 kJ/day, the ratio of energy saving is 46.50% and the reduction of CO2 emissions is 167 kg/day for a period of 10 years which compare to the conventional boiler combined with chiller.
Chang, Chia-Hao, and 張家豪. "Measurement and Analysis of Adsorption Chillers System combined with Solar Thermal Energy and Shallow Geothermal Energy." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/9z8t8z.
Повний текст джерела國立臺灣大學
機械工程學研究所
107
When the world began to promote energy conservation issues, the energy-saving benefits of air-conditioning systems are valued by many countries. The proportion of power consumption for energy dissipation is huge. Taiwan is hot in summer. The demand for air conditioning is great, which not only cost a lot, but also cause greatly environmental burden with carbon emissions. If it can directly use solar energy as a source of heat for air conditioners and use shallow geothermal energy to cooling, this way will greatly reduce power consumption and make air conditioners more energy efficient and environmentally friendly. This study use different parameters way to explore the performance of adsorption chillers combined with solar thermal energy and shallow geothermal energy . The COP of the adsorption chiller achieve 0.51 under the operating conditions, of 70 °C regenerative temperature, 22°C cooling water temperature, and 13~15 °C cold water temperature. Under the average radiation amount is about 860 W/m2, the thermal efficiency of the solar collector is about 0.6 and the overall system performance coefficient is about 0.31. It is estimated that use shallow geothermal energy instead of cooling tower system can save 44.6 m3 of water in summer. And it uses less 1.08 kW than cooling tower system.
Chen, Yung-Nan, and 陳勇男. "A Study of Household or Commercial Heat Pump System with Shallow Geothermal Energy." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/42251856223799183602.
Повний текст джерела國立臺灣大學
機械工程學研究所
105
A Study of Household or Commercial Heat Pump System with Shallow Geothermal Energy By Yung-Nan Chen Master Degree of Engineering, Department of Mechanical Engineering National Taiwan University July 2016 Adviser:Sih-Li Chen, Ph.D. The purpose of this study is to test a geothermal heat pump system with two apply ways, which includes raft foundation water energy and groundwater energy. For shallow geothermal energy which temperature is lower than outdoor air in summer and higher in the winter. With this property, we want to replace the traditional heating and cooling equipment by geothermal heat pump system. In the application of raft foundation water energy and groundwater energy we via six different mode to combine heat pump system with geothermal energy for heating and cooling purpose. For groundwater energy, we used Multi-U type Borehole Heat Exchangers (MUBHEs), made of PVC material tubes to exchange heat from the evaporator or condenser of heat pump. Through experiment, we want to realize the advantages and disadvantages for this two different ways in using shallow geothermal energy. At the same time, we will compare the efficiency and cost with commonly heating and cooling household equipment in Taiwan. According to the experiment, the heating mode with raft foundation water, a high efficiency in COP 4.3 is present. And the cooling mode with raft foundation water has cooling efficiency in COP 4 with providing refrigerating capacity 18 kW. Besides, the dual mode that heating and cooling simultaneously, can provide high efficiency when operating heat pump system in right situation. In the study of these experiment, we will compare two apply modes of geothermal energy and conclusion experimental analysis, find the way to improve design to reach more high efficiency. Keywords : Shallow Geothermal Energy, Heat pump, Multi-U type Borehole Heat Exchangers, raft foundation water
Yang, Tzu-Hung, and 楊子弘. "Emergency Control Strategy of Energy Storage System for Cimei Offshore Grid." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/xnjnax.
Повний текст джерела國立中山大學
電機工程學系研究所
106
This paper investigates the control strategy of Battery Energy Storage System (BESS) to improve the system disturbance for Cimei Island caused by the photovoltaic generation system(PVGS) due to intermittent output and sudden tripping. According to the frequency response of testing on-site BESS discharge, the mathematical models with the corresponding parameters of both diesel-generators and BESS have been confirmed. The transient stability analysis of Cimei grid is executed for step increase of various levels of system loading. Finally, the relationship between the load variation and the time required for frequency drop to 59Hz is derived with regression analysis, which is embedded in the control strategy of BESS. This thesis selects the Cimei Island for case study to illustrate the effectiveness of the proposed BESS control strategy. The data of power grid such as the generators, transformers, distribution, feeder and load demand are collected. The voltage variation due to PV power generation is calculated for peak and off-peak period respectively. The transient stability analysis of Cimei power system is performed considering BESS high-speed discharge control to solve the system frequency response for variation of PV power generation and tripping of whole PV system. It is found that the implementation of BESS is very critical to maintain good transient stability and voltage quality for the offshore island power grid with high penetration of renewable energy.
Chang, Cheng-wen, and 張政文. "Power System Analysis for Offshore Islands with High Penetration of Renewable Energy." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/01754541251175380910.
Повний текст джерела國立中山大學
電機工程學系研究所
104
This thesis develops the power system models of Chimei Island and Dongji Island, including generator model and parameter, translator, feeder and loading data. The thesis investigates load flow analysis and transient stability analysis for Chimei Island in both heavy load and light load scenarios by PSSE-32. Then the transient stability analysis is executed by considering the tripping and power variation with various ramp-rates of photovoltaic generation system. Power supply instability and frequency fluctuations become longer with high penetration of renewable energy. This paper reports on power stability control and frequency compensation by using an energy storage device. The use of an energy storage device improves the energy efficiency of the offshore island power systems depending on time and weather conditions. Keywords: Photovoltaic Generation System, Energy Storage, Load Trip, Transient Stability, Chimei Island
WU, CHENG-LIN, and 吳承霖. "Study on Control Strategy of Energy Storage System for Offshore Island Grid." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/yp2437.
Повний текст джерела國立高雄科技大學
電機工程系
107
This thesis presents control strategies that involve a battery energy storage system (BESS) for a microgrid power system on an offshore island with a high penetration of PV renewable energy. An energy management system performs the supervisory control and data acquisition of diesel generators (DGs), distribution feeders, a PV system and the BESS. The simulation uses mathematical models of the diesel generators, the PV system and the BESS. The parameters of the generator models are validated using real test data concerning the microgrid response to the power control of the BESS to simulate a step change in the system load demand. An expert system is embedded in the iEMS to support decision-making for fast discharging of power from the BESS to improve the transient stability of the grid under large disturbances, such as the tripping of the DGs or the PV farm. To support the economic dispatch of the microgrid, a strategy of peak shaving and valley filling of the net system load profile is perform to improve the system load factor using the BESS; the strategy considers hourly forecasting of the system loading and solar power generation. The results of a system simulation and field test demonstrate that the proposed control strategies that involve the BESS significantly improve the power service quality and transient stability of the system in the island microgrid, which has a high penetration of renewable generation.
Chang, He-Chien, and 張合謙. "Investigate of Geothermal Energy Applications and Assisted Air-Conditioning System Energy-A Case Study of Taiwan Sea Gaia Spring Hotel." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/wf3j96.
Повний текст джерела國立臺北科技大學
建築與都市設計研究所
100
As we know, the nature resources in Taiwan is not sufficient, geothermal energy is one of important nature energy. So far 26 famous geothermal places were developed and used in Taiwan. Geothermal energy can be used to generate power, warm up the air condition system, and heat the water; as well as develop the tourism of spring water for leisure and other multiple functions. The operation of air condition unit is occupied 30% of energy consumption in the building equipment. To analyze different parts of the operation of air condition, main power station is occupied 60% sharing, water pump is 11%, air condition box and indoor fan is 13% and others is 16%. Using geothermal energy to assist air condition system will reduce the power consumption on the start of main station and decrease the energy exhaustion. Comparing with traditional air condition, geothermal energy can save the energy, prolong the time of maintenance, extend the life cycle of air condition system and reduce the cost for operation. The thesis is a study of geothermal energy application to assist air-conditioning system to save energy-a case study of Taiwan Sea Gaia Spring Hotel, using spring water with the temperature 90℃~100℃ to assist main power station of air condition, to discuss the possibility to save main power station energy consumption and reduce the energy exhaustion.
Parmar, Vismay V. "Ammonia Production from a Non-Grid Connected Floating Offshore Wind-Farm: A System-Level Techno-Economic Review." 2019. https://scholarworks.umass.edu/masters_theses_2/750.
Повний текст джерела