Relevant bibliographies by topics / Ocean thermal power plants

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  2. Dissertations / Theses
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  4. Book chapters
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Academic literature on the topic 'Ocean thermal power plants'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 July 2024

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Journal articles on the topic "Ocean thermal power plants"

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Hendrawan, Andi, Aji K. Hendrawan, Sri Pramomo, and Lusiani Lusiani. "Thermohydraulic Analysis of Ocean Thermal Energy Conversion." Saintara : Jurnal Ilmiah Ilmu-Ilmu Maritim 7, no. 2 (September 30, 2023): 52–56. http://dx.doi.org/10.52475/saintara.v7i2.233.

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Thermohydraulic analysis is a mandatory analysis for power plants, including in this case marine thermal power plants (OTEC = ocens thermal energy conversion). The application to OTEC shows that temperature and pressure are things that must be considered, the higher the surface temperature, the greater the output power. Calculation of heat flow is a variable that is determined before a plant is built. This study aims to make a mathematical analysis of heat flow or thermohydraulic. The study uses the study of the heritage of Mendalan so that modeling and determination of design variables are formed, including heat flow in the pipe, diameter, hot and cold water discharge and boiler variables
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Surinati, Dewi, and Muhammad Ramadhani Marfatah. "PENGARUH FAKTOR HIDRODINAMIKA TERHADAP SEBARAN LIMBAH AIR PANAS DI LAUT." OSEANA 44, no. 1 (April 30, 2019): 26–37. http://dx.doi.org/10.14203/oseana.2019.vol.44no.1.29.

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HYDRODYNAMICS EFFECT TO THE DISTRIBUTION OF THERMAL WASTE IN THE OCEAN. The ocean is a thermal waste disposal site derived from thermal power plants. The ecosystems and marine biota could be disrupted even massive damaged if this waste was disposed into the ocean without proper processing. All activities in the ocean need a well understanding of hydrodynamics to avoid or minimize any negative effects that may occur. It needs dispersion modeling of heat water prior to the construction of the power plant in order to reduce the impact of environmental damage.
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Wiegel, Robert L., John T. Wells, and Michele A. Murdoch. "COOLING WATER RECIRCULATION IN THE OCEAN." Coastal Engineering Proceedings 1, no. 20 (January 29, 1986): 200. http://dx.doi.org/10.9753/icce.v20.200.

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In some configurations of cooling water systems for thermal-electric power plants, which use sea water as a source, a certain amount of recirculation occurs. A theory is developed to predict this recirculation.
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Głuch, Jerzy. "Fault detection in measuring systems of power plants." Polish Maritime Research 15, no. 4 (January 1, 2008): 45–51. http://dx.doi.org/10.2478/v10012-007-0096-8.

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Fault detection in measuring systems of power plants This paper describes possibility of forming diagnostic relations based on application of the artifical neural networks (ANNs), intended for the identifying of degradation of measuring instruments used in developed power systems. As an example a steam turbine high-power plant was used. And, simulative calculations were applied to forming diagnostic neural relations. Both degradation of the measuring instruments and simultaneously occurring degradation of the measuring instruments and thermal cycle component devices, were taken into account. Good quality of diagnostic neural relations was stated. They make it possible to distinguish degradation of measuring instruments from degradation of thermal cycle components. The calculated errors of identification of dergraded devices and measuring instruments in the case of simultaneous occurence of three different degradations were on the level of 0.25 %. Performance of the relations was presented by using an example based on industrial practice.
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Giordani, Helia Danielle, Matheus Lages, Miguel Medina, and Jade Tan-Holmes. "Affects of the Cold Water Pipe Depth in Ocean Thermal Energy Converter Plants with respect to Power Generation Efficiency." PAM Review Energy Science & Technology 2 (August 31, 2015): 50–66. http://dx.doi.org/10.5130/pamr.v2i0.1395.

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The Ocean provides an extensive renewable energy source. It is the exploitation of the thermal gradient between the warmed surface water and the deep cold water. A heat engine was developed to use the surface water as a heat source and the deep water as a cold source in order to convert thermal energy into mechanical energy and generate electricity. This process is called Ocean Thermal Energy Conversion (OTEC). This paper presents the three different types of OTEC power plants: closed-cycle, open-cycle and hybrid-cycle, showing real and conceptual examples of each. All three systems are analyzed in terms of gross power, net power, efficiency and size. Furthermore, the depth of the cold water pipe is discussed and related to the net power generation of the OTEC plant. The power generation efficiency of the plant increases as the gross power production increases. This is due to the depth of the cold water pipe and amount of power used by the cold water pipe pump.
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Barberis, Stefano, Andrea Giugno, Giacomo Sorzana, Miguel F. P. Lopes, and Alberto Traverso. "Techno-economic analysis of multipurpose OTEC power plants." E3S Web of Conferences 113 (2019): 03021. http://dx.doi.org/10.1051/e3sconf/201911303021.

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Ocean Thermal Energy Conversion (OTEC) is a promising technology to provide sustainable and dispatchable energy supply to oceanic coastal areas and islands. It exploits the temperature difference between deep cold ocean water and warm tropical surface water in an Organic RankineCycle (ORC), guaranteeing a continuous and dispatchable electric production, overcoming one ofthe most critical issue of renewable generators such as PV or wind turbines. Despite the technological maturity of ORC application to OTEC systems, it still presents technical and economicbarriers mainly related to their economic feasibility, large initial investments as well as heavy and time demanding civil installation works. To overcome such issues, multipurpose OTEC plants are proposed, producing electrical power as well as other products, such as useful thermal power (e.g. ambient cooling) and desalinated water. Since OTEC engineering is still at a lowdegree of maturity, there are no widespread and established tools to facilitate OTEC feasibility studies and to allow performance and cost optimization. Therefore, in this paper, a new tool for techno-economic analysis and optimization of multipurpose OTEC plants is presented. Starting from a detailed database of local water temperature and depth, the approach allows to provide a quantitative insight on the achievable performance, required investment, and expected economic returns, allowing for a preliminary but robust assessment of site potential as well as plant size. After the description of the techno-economic approach and related performance and cost functions, the tool is applied to an OTEC power plant case study in the range of 1 MW gross electrical power, including a preliminary assessment of scaling-up effects.
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Bin Nadeem, Talha, Asad A. Naqvi, and Ahsan Ahmed. "Suitable Site Selection for Ocean Thermal Energy Conversion (OTEC) systems – A case study for Pakistan." TECCIENCIA 33, no. 17 (October 10, 2022): 35–48. http://dx.doi.org/10.18180/tecciencia.2022.33.4.

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In developing countries such as Pakistan, the issue of generating power is crucial. As conventional power sources (fossil fuels) are depleting at an alarming rate. An abundant amount of energy is generated by thermal power plants using fossil fuels as their primary energy resource for combustion. Hence extreme uses of fossil fuels are noticed, which is greatly responsible for damaging our environment. Oceans exists around 71% of the surface area of earth and it has enormous potential for electricity generation. This study focuses on site selection for harnessing ocean energy by utilizing Ocean Thermal Energy Conversion (OTEC) systems for coastal areas of Pakistan. In this study, four sites across the coastal region of Pakistan have been studied namely Karachi, Gwadar, Ormara and Pasni. Their theoretical maximum Carnot efficiencies have also been determined and Gwadar has been identified as the most suitable location for OTEC plant with the maximum theoretical efficiency of around 6.53%, 6.93% and 7.75% at the cold-water depths of 1000m, 1200m and 1500m, respectively.
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Yasunaga, Takeshi, Kevin Fontaine, and Yasuyuki Ikegami. "Performance Evaluation Concept for Ocean Thermal Energy Conversion toward Standardization and Intelligent Design." Energies 14, no. 8 (April 20, 2021): 2336. http://dx.doi.org/10.3390/en14082336.

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Ocean thermal energy conversion (OTEC) uses a very simple process to convert the thermal energy stored mainly in tropical oceans into electricity. In designs, operations, and evaluations, we need to consider the unique characteristics of OTEC to achieve the best performance or lower the electricity cost of projects. The concept and design constraints of OTEC power generation differ from those of conventional thermal power plants due to the utilization of a low temperature difference. This research theoretically recognizes the unique characteristics of the energy conversion system and summarizes the appropriate performance evaluation methods for OTEC based on finite-time thermodynamics and the equilibrium condition of the heat source. In addition, it presents the concept of normalization of thermal efficiency for OTEC and exergy efficiency based on the available thermal energy in the ocean defined as the transferable thermal energy from the ocean and the equilibrium condition as the dead state for exergy. The differences between conventional thermal efficiency and the effectiveness of the evaluation methods are visualized using the various reference design data, and it is ascertained that there is no clear relation between the conventional thermal efficiency and exergy efficiency, whereas the normalized thermal efficiency is definitely proportional to the exergy efficiency. Moreover, the exergy efficiency shows the effectiveness of the staging Rankine, Kalina, and Uehara cycles. Therefore, the normalized thermal efficiency and the exergy efficiency are important to analyze the heat and mass balance as well as improvement of the system.
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Curto, Domenico, Vincenzo Franzitta, and Andrea Guercio. "Sea Wave Energy. A Review of the Current Technologies and Perspectives." Energies 14, no. 20 (October 13, 2021): 6604. http://dx.doi.org/10.3390/en14206604.

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The proposal of new technologies capable of producing electrical energy from renewable sources has driven research into seas and oceans. Research finds this field very promising in the future of renewable energies, especially in areas where there are specific climatic and morphological characteristics to exploit large amounts of energy from the sea. In general, this kind of energy is referred to as six energy resources: waves, tidal range, tidal current, ocean current, ocean thermal energy conversion, and saline gradient. This review has the aim to list several wave-energy converter power plants and to analyze their years of operation. In this way, a focus is created to understand how many wave-energy converter plants work on average and whether it is indeed an established technology.
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Shekarbaghani, Ashrafoalsadat. "Determine the best location for Ocean Thermal Energy Conversion (OTEC) in Iranian Seas." Modern Applied Science 10, no. 5 (February 28, 2016): 32. http://dx.doi.org/10.5539/mas.v10n5p32.

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Two-thirds of the earth's surface is covered by oceans. These bodies of water are vast reservoirs of renewable energy.<strong> </strong>Ocean Thermal Energy Conversion technology, known as OTEC, uses the ocean’s natural thermal gradient to generate power. In geographical areas with warm surface water and cold deep water, the temperature difference can be leveraged to drive a steam cycle that turns a turbine and produces power. Warm surface sea water passes through a heat exchanger, vaporizing a low boiling point working fluid to drive a turbine generator, producing electricity. OTEC power plants exploit the difference in temperature between warm surface waters heated by the sun and colder waters found at ocean depths to generate electricity. This process can serve as a base load power generation system that produces a significant amount of renewable, non-polluting power, available 24 hours a day, seven days a week. In this paper investigated the potential of capturing electricity from water thermal energy in Iranian seas (Caspian Sea, Persian Gulf and Oman Sea). According to the investigated parameters of OTEC in case study areas, the most suitable point in Caspian Sea for capturing the heat energy of water is the south part of it which is in the neighborhood of Iran and the most suitable point in the south water of Iran, is the Chahbahar port.
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Dissertations / Theses on the topic "Ocean thermal power plants"

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Rizea, Steven Emanoel. "Optimization of Ocean Thermal Energy Conversion Power Plants." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5462.

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A proprietary Ocean Thermal Energy Conversion (OTEC) modeling tool, the Makai OTEC Thermodynamic and Economic Model (MOTEM), is leveraged to evaluate the accuracy of finite-time thermodynamic OTEC optimization methods. MOTEM is a full OTEC system simulator capable of evaluating the effects of variation in heat exchanger operating temperatures and seawater flow rates. The evaluation is based on a comparison of the net power output of an OTEC plant with a fixed configuration. Select optimization methods from the literature are shown to produce between 93% and 99% of the maximum possible amount of power, depending on the selection of heat exchanger performance curves. OTEC optimization is found to be dependent on the performance characteristics of the evaporator and condenser used in the plant. Optimization algorithms in the literature do not take heat exchanger performance variation into account, which causes a discrepancy between their predictions and those calculated with MOTEM. A new characteristic metric of OTEC optimization, the ratio of evaporator and condenser overall heat transfer coefficients, is found. The heat transfer ratio is constant for all plant configurations in which the seawater flow rate is optimized for any particular evaporator and condenser operating temperatures. The existence of this ratio implies that a solution for the ideal heat exchanger operating temperatures could be computed based on the ratio of heat exchanger performance curves, and additional research is recommended.
ID: 031001365; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Adviser: Marcel Ilie.; Title from PDF title page (viewed May 8, 2013).; Thesis (M.S.M.E.)--University of Central Florida, 2012.; Includes bibliographical references (p. 77-78).
M.S.M.E.
Masters
Mechanical and Aerospace Engineering
Engineering and Computer Science
Mechanical Engineering; Mechanical Systems
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Rodríguez, Buño Mariana. "Near and far field models of external fluid mechanics of Ocean Thermal Energy Conversion (OTEC) power plants." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79495.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 126-130).
The world is facing the challenge of finding new renewable sources of energy - first, in response to fossil fuel reserve depletion, and second, to reduce greenhouse gas emissions. Ocean Thermal Energy Conversion (OTEC) can provide renewable energy by making use of the temperature difference between the surface ocean and deep ocean water in a Rankine cycle. An OTEC plant pumps huge volumes of water from the surface and nearly 1 km depth, and releases it at an intermediate depth. The effects of this enormous flux are crucial to understand since disruption of the ambient temperature stratification can affect the efficiency of the plant itself and of adjacent plants. This thesis aims to study the external fluid mechanics of offshore OTEC power plants, to assess their environmental impact and to help analyze whether OTEC plants can provide a sustainable source of energy. Although there has been interest in OTEC for several decades, so far primarily physical and analytical models have been developed. In this study numerical models are developed to model OTEC operating plants: integral models for the near and intermediate field and a large-scale ocean general circulation model. Two strategies in modeling OTEC plant discharge are used to analyze plume dynamics: the "Brute Force" approach, in which a circulation model, MITgcm, computes the near, intermediate and far field mixing; and the "Distributed Sources and Sinks" approach, in which the near and intermediate field are represented in the circulation model by sources and sinks of mass computed by integral models. This study concludes that the Brute Force modeling strategy is highly computationally demanding and sometimes inaccurate. Such simulations are very sensitive to model resolution and may require the use of unrealistic model parameters. The Distributed Sources and Sinks approach was found to be capable of modeling the plume dynamics accurately. This method can be applied to the study of adjacent OTEC power plant interaction, redistribution of nutrients, and propagation of contaminants.
by Mariana Rodríguez Buño.
S.M.
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Cottam, P. J. "Innovation in solar thermal chimney power plants." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10045417/.

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This thesis analyses novel technology for renewable electricity generation: the solar thermal chimney (STC) power plant and the suspended chimney (SC) as a plant component. The STC consists of a solar collector, a tall chimney located at the centre of the collector, and turbines and generators at the base of the chimney. Air heated in the collector rises up the chimney under buoyancy and generates power in the turbines. STCs have the potential to generate large amounts of power, but research is required to improve their economic viability. A state-of-the-art STC model was developed, focussing on accurate simulation of collector thermodynamics, and providing data on flow characteristics and plant performance. It was used to explore power generation for matched component dimensions, where for given chimney heights, a range of chimney and collector radii were investigated. Matched dimensions are driven by the collector thermal components approaching thermal equilibrium. This analysis was complemented with a simple cost model to identify the most cost-effective STC configurations. The collector canopy is an exceptionally large structure. Many of the designs proposed in the literature are either complex to manufacture or limit performance. This thesis presents and analyses a series of novel canopy profiles which are easier to manufacture and can be incorporated with little loss in performance. STC chimneys are exceptionally tall slender structures and supporting their self-weight is difficult. This thesis proposes to re-design the chimney as a fabric structure, held aloft with lighter-than-air gas. The performance of initial, small scale suspended chimney prototypes under lateral loading was investigated experimentally to assess the response to wind loads. A novel method of stiffening is proposed and design of larger prototypes developed. The economic viability of a commercial-scale suspended chimney was investigated, yielding cost reductions compared to conventional chimney designs.
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Rahmqvist, Elin. "On stochastic unit commitment for thermal power plants." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285519.

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Climate change is a fact, a crisis threatening every country, economy and human. Toprevent this crisis, the emission of greenhouse gases needs to decrease dramatically. 72%of global greenhouse gas emissions in 2016 came from energy production where electricityand heat account for 42% of the 72%. Nevertheless, coal power grew with 28% in2018 to meet the increased demand of electricity. It is therefore of utmost importancethat the resources used in power plants are distributed as efficiently as possible. Unitcommitment is a short-term planning formulation which is part of the planning chain forproduction of electrical energy. An accurate unit commitment can decrease emissionsand costs.The aim of this study is to implement a model for the stochastic behavior of the electricalload into unit commitment. With this, it shall be evaluated, whether this solutionis robust enough for usage in network control. The evaluation needs to assess the reliability,economic impact and the computational e↵ort for solving the stochastic unitcommitment problem.A test system has been created in MATLAB to evaluate the stochastic versus deterministicunit commitment formulation. Scenarios for the stochastic unit commitmenthave been generated by using a stationary, discrete-time Markov Chain to generate loadforecast errors. The Fast Forward Selection method has been used to reduce number ofscenarios to minimize computational e↵ort. The quality of the solution has then beenevaluated with value of the stochastic solution for economic analysis. Loss of load probabilityand energy not served have been used to evaluate the reliability.A stochastic approach gives a more robust solution but can be more expensive in termsof costs. Five scenarios were the optimal choice for the stochastic unit commitmentformulation. Increasing number of scenarios did not improve the reliability and resultedin a more expensive solution. The conclusion of this work can be contradictory but highlightsone of the challenges in electric power systems. A more robust system is usuallymore costly and therefore the players in the system must decide what is most desirablein this particular system. A more reliable but expensive system or a less reliable andless costly system.
Klimatförändringarna är ett faktum, en kris som hotar varje land, ekonomi och människa.‌För att förebygga denna kris måste utsläppen av växthusgaser minska dramatiskt. 72 % av de globala utsläppen av växthusgaser år 2016 kom från energiproduktion där värme och elektricitet stod för 42 % av dessa utsläpp. Trots detta växte kolkraften med 28% år 2018 för att kunna möta den ökande efterfrågan på elektricitet. Det är därför av yttersta vikt att dessa resurser används på ett så e↵ektivt sätt som möjligt. En bra och exakt korttidsplanering av kraftsystem kan minska utsläppen och kostnaderna.Målet med denna studie är att implementera stokastisk last i korttidsplaneringen för ett mindre elkraftsystem med 11 enheter. Detta kräver en robust metod som begränsar beräkningstiden för att säkerställa kontinuerlig och säker drift av elkraftsystemet. Analysen måste utvärdera tillförlitligheten, ekonomiska e↵ekterna och beräkningstiden för att lösa det stokastiska korttidsplaneringsproblemet.Ett testsystem har skapats i MATLAB för att utvärdera den stokastiska kontra deterministiska korttidsplaneringsproblemet. Scenarier för det stokastiska korttidsplaneringen har genererats genom att använda en stationär Markov-kedja för att generera felen i lastprognosen och sedan använda Fast Forward Selection metoden för att minska antalet scenarier för att minimera beräkningsinsatsen. Stokastisk korttidsplanering har sedan utvärderats med värdet av den stokastiska lösningen för ekonomisk analys. Sannolikheten för bortkoppling av last samt icke levererad energi har beräknats för att utvärdera tillförlitligheten.En stokastisk metod ger en mer robust lösning men kan vara dyrare vad gäller kostnader. Fem scenarier var det optimala valet för den stokastiska korttidsplaneringsformuleringen. Ö kande av antal scenarier förbättrade inte tillförlitligheten och resulterade i en dyrare lösning. Slutsatsen i detta arbete kan kännas motsägelsefullt då den deterministiska metoden visar på lägre kostnader medans den stokastiska är mer robust. Detta belyser en av utmaningarna i elkraftsystem. Ett mer robust system är vanligtvis dyrare och därför måste aktörerna i systemet bestämma vad som är mest önskvärt i det specifika systemet. Ett mer tillförlitligt men dyrare system eller ett mindre pålitligt och billigaresystem.
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Assémat, Céline. "Management of thermal power plants through use values." Thesis, KTH, Elektriska energisystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175811.

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Electricity is an essential good, which can hardly be replaced. It can be produced thanks to a wide rangeof sources, from coal to nuclear, not to mention renewables such as wind and solar. In order to meetdemand at the lowest cost, an optimisation is made on electricity markets between the differentproduction plants. This optimisation mainly relies on the electricity production cost of each technology.In order to include long-term constraints in the short-term optimisation, a so-called use value (oropportunity cost) can be computed and added to the production cost. One long-term constraint thatEDF, the main French electricity producer, is facing is that its gas plants cannot exceed a given numberof operation hours and starts between two maintenances. A specific software, DiMOI, computes usevalues for this double constraint but its parameters needs to be tested in order to improve thecomputation, as it is not thought to work properly.DiMOI relies on dynamic programming and more particularly on an algorithm called Bellman algorithm.The software has been tested with EDF R&D department in order to propose some modellingimprovements. Electricity and gas market prices, together with real plant parameters such as startingcosts, operating costs and yields, were used as inputs for this work, and the results were checkedagainst reality.This study gave some results but they appeared to be invalid. Indeed, an optimisation problem wasdiscovered in DiMOI computing core: on a deterministic context, a study with little degrees of freedomwas giving better profits than a study with more degrees of freedom. This problem origin was notfound precisely with a first investigation, and the R&D team expected the fixing time to be very long.The adaptation of a simpler tool (MaStock) was proposed and made in order to replace DiMOI. Thisproject has thus led to DiMOI giving up and its replacement by MaStock. Time was missing to testcorrectly this tool, and the first study which was made was not completely positive. Further studiesshould be carried out, for instance deterministic ones (using real past data) whose results could becompared to reality.Some complementary studies were made from a fictitious system, in order to study the impact of someparameters when computing use values and operations schedules. The conclusions of these studiesare the little impacts that changes in gas prices and start-up costs parameters have on the global resultsand the importance of an accurate choice in the time periods durations used for the computations.Unfortunately these conclusions might be too specific as they were made on short study periods.Further case studies should be done in order to reach more general conclusions.
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Rennie, Eleanor Jane. "Thermal performance of power station cooling towers." Thesis, University of Nottingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335762.

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El, Khaja Ragheb Mohamad Fawaz. "Solar-thermal hybridization of Advanced Zero Emissions Power Plants." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74434.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 43-44).
Carbon Dioxide emissions from power production are believed to have significant contributions to the greenhouse effect and global warming. Alternative energy resources, such as solar radiation, may help abate emissions but suffer from high costs of power production and temporal variations. On the other hand, Carbon Capture and Sequestration allows the continued use of fossil fuels without the CO2 emissions but it comes at an energetic penalty. The Advanced Zero Emissions Plant (AZEP) minimizes this energy loss by making use of Ion Transport Membrane (ITM)-based oxy-combustion to reduce the cost of carbon dioxide separation. This work seeks to assess if there are any thermodynamic gains from hybridizing solar-thermal energy with AZEP. The particular focus is hybridizing of the bottoming cycle with supplemental solar heating. A simple model of parabolic solar trough was used to hybridize a model of the AZEP cycle in ASPEN Plus*. Two cycle configurations are studied: the first uses solar parabolic troughs to indirectly vaporize high pressure steam through Therminol and the second uses parabolic troughs to directly preheat the high pressure water stream prior to vaporization. Simulations of the solar vaporizer hybrid by varying the total area of collectors (holding fuel input constant) show an increase of net electric output from 439MW for the non-hybridized AZEP to 533MW with an input solar share of 38.8%. The incremental solar efficiency is found to be around 16% for solar shares of input ranging from 5% to 38.8%. Moreover, simulations of variable solar insolation for collector area of 550,000 m2 , show that incremental solar efficiency increased with solar insolation reaching a plateau around 17%. Simulations of the direct solar preheater, show a net electric output of 501.3 MW for a solar share of 35%, (an incremental solar efficiency of 13.73%). The power generation and hence incremental efficiency is lower than in hybridization with steam vaporization with the same input solar share. Synergy analysis for the steam vaporization hybrid indicates no thermodynamic gains from hybridization.
by Ragheb Mohamad Fawaz El Khaja.
S.B.
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Allen, Kenneth Guy. "Rock bed thermal storage for concentrating solar power plants." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86521.

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Thesis (PhD)--Stellenbosch University, 2014.
ENGLISH ABSTRACT: Concentrating solar power plants are a promising means of generating electricity. However, they are dependent on the sun as a source of energy, and require thermal storage to supply power on demand. At present thermal storage – usually molten salt – although functional, is expensive, and a cheaper solution is desired. It is proposed that sensible heat storage in a packed bed of rock, with air as heat transfer medium, is suitable at temperatures of 500 – 600 °C. To determine if this concept is technically feasible and economically competitive with existing storage, rock properties, packed bed pressure drop and thermal characteristics must be understood. This work addresses these topics. No previously published data is available on thermal cycling resistance of South African rock, and there is limited data from other countries in the proposed temperature range for long-term thermal cycling, so samples were thermally cycled. There is rock which is suitable for thermal storage applications at temperatures of 500 – 600 °C. New maps of South Africa showing where potentially suitable rock is available were produced. Dolerite, found extensively in the Karoo, is particularly suitable. Friction factors were measured for beds of different particles to determine the importance of roughness, shape, and packing arrangement. Five sets of rock were also tested, giving a combined dataset broader than published in any previous study. Limitations of existing correlations are shown. The friction factor is highly dependent on particle shape and, in the case of asymmetric particles, packing method. The friction factor varied by up to 70 % for crushed rock depending on the direction in which it was poured into the test section, probably caused by the orientation of the asymmetric rock relative to the air flow direction. This has not been reported before for rock beds. New isothermal correlations using the volume equivalent particle diameter are given: they are within 15 % of the measurements. This work will allow a techno-economic evaluation of crushed rock beds using more accurate predictions of pumping power than could previously be made. Thermal tests below 80 °C show that bed heat transfer is insensitive to particle shape or type. A heat transfer correlation for air in terms of the volume equivalent diameter was formulated and combined with the E-NTU method. The predicted bed outlet temperatures are within 5 °C of the measurements for tests at 530 °C, showing that the influence of thermal conduction and radiation can be reasonably negligible for a single charge/discharge cycle at mass fluxes around 0.2 kg/m2s. A novel method for finding the optimum particle size and bed length is given: The Biot number is fixed, and the net income (income less bed cost) from a steam cycle supplied by heat from the bed is calculated. A simplified calculation using the method shows that the optimum particle size is approximately 20 mm for bed lengths of 6 – 7 m. Depending on the containment design and cost, the capital cost could be an order of magnitude lower than a nitrate salt system.
AFRIKAANSE OPSOMMING: Gekonsentreerde son-energie kragstasies is n belowende manier om elektrisiteit op te wek, maar hulle is afhanklik van die son as n bron van energie. Om drywing op aanvraag te voorsien moet hulle energie stoor. Tans is termiese stoor – gewoonlik gesmelte sout – hoewel funksioneel, duur, en n goedkoper oplossing word gesoek. Daar word voorgestel dat stoor van voelbare warmte-energie in n gepakte rotsbed met lug as warmteoordrag medium geskik is by temperature van 500 – 600 °C. Om te bepaal of dié konsep tegnies gangbaar en ekonomies mededingend met bestaande stoorstelsels is, moet rotseienskappe, gepakte bed drukval en hitteoordrag verstaan word. Hierdie werk spreek hierdie aspekte aan. Geen voorheen gepubliseerde data is beskikbaar oor die termiese siklus weerstand van Suid-Afrikaanse rots nie, en daar is beperkte data van ander lande in die voorgestelde temperatuurbereik, dus is monsters onderwerp aan termiese siklusse. Daar bestaan rots wat geskik is vir termiese stoor toepassings by temperature van 500 – 600 °C. Nuwe kaarte van Suid-Afrika is opgestel om te wys waar potensieel geskikte rots beskikbaar is. Doleriet, wat wyd in die Karoo voor kom, blyk om veral geskik te wees. Wrywingsfaktore is gemeet vir beddens van verskillende partikels om die belangrikheid van grofheid, vorm en pak-rangskikking te bepaal. Vyf rotsstelle is ook getoets, wat n saamgestelde datastel gee wyer as in enige gepubliseerde studie. Beperkings van bestaande korrelasies word aangetoon. Die wrywingsfaktor is hoogs sensitief vir partikelvorm en, in die geval van asimmetriese partikels, pakkings metode. Die wrywingsfaktor het met tot 70 % gevarieer vir gebreekte rots, afhanklik van die rigting waarin dit in die toetsseksie neergelê is. Dit is waarskynlik veroorsaak deur die oriëntasie van die asimmetriese rots relatief tot die lugvloei rigting, en is nie voorheen vir rotsbeddens gerapporteer nie. Nuwe isotermiese korrelasies wat gebruik maak van die volume-ekwivalente partikel deursnee word gegee: hulle voorspel binne 15 % van die gemete waardes. Hierdie werk sal n tegno-ekonomiese studie van rotsbeddens toelaat wat meer akkurate voorspellings van pompdrywing gebruik as voorheen moontlik was. Termiese toetse onder 80 °C wys dat die warmteoordrag nie baie sensitief is vir partikelvorm en -tipe nie. n Warmte-oordragskorrelasie vir lug in terme van die volume-ekwivalente deursnee is ontwikkel en met die E-NTU-metode gekombineer. Die voorspelde lug uitlaat temperatuur is binne 5 °C van die meting vir toetse by 530 °C. Dit wys dat termiese geleiding en straling redelikerwys buite rekening gelaat kan word vir n enkele laai/ontlaai siklus by massa vloeitempos van omtrent 0.2 kg/m2s. n Oorspronklike metode vir die bepaling van die optimum partikelgrootte en bedlengte word gegee: Die Biot-getal is vas, en die netto inkomste (die inkomste minus die bed omkoste) van n stoomsiklus voorsien met warmte van die bed word bereken. n Vereenvoudigde berekening wat die metode gebruik wys dat die optimum grootte en lengte ongeveer 20 mm en 6-7 m is. Afhangende van die behoueringsontwerp en koste, kan die kapitale koste n orde kleiner wees as dié van n gesmelte nitraatsout stelsel
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Allen, Kenneth Guy. "Performance characteristics of packed bed thermal energy storage for solar thermal power plants." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4329.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: Solar energy is by far the greatest energy resource available to generate power. One of the difficulties of using solar energy is that it is not available 24 hours per day - some form of storage is required if electricity generation at night or during cloudy periods is necessary. If a combined cycle power plant is used to obtain higher efficiencies, and reduce the cost of electricity, storage will allow the secondary cycle to operate independently of the primary cycle. This study focuses on the use of packed beds of rock or slag, with air as a heat transfer medium, to store thermal energy in a solar thermal power plant at temperatures sufficiently high for a Rankine steam cycle. Experimental tests were done in a packed bed test section to determine the validity of existing equations and models for predicting the pressure drop and fluid temperatures during charging and discharging. Three different sets of rocks were tested, and the average size, specific heat capacity and density of each set were measured. Rock and slag samples were also thermally cycled between average temperatures of 30 ºC and 510 ºC in an oven. The classical pressure drop equation significantly under-predicts the pressure drop at particle Reynolds numbers lower than 3500. It appears that the pressure drop through a packed bed is proportional to the 1.8th power of the air flow speed at particle Reynolds numbers above about 500. The Effectiveness-NTU model combined with a variety of heat transfer correlations is able to predict the air temperature trend over the bed within 15 % of the measured temperature drop over the packed bed. Dolerite and granite rocks were also thermally cycled 125 times in an oven without breaking apart, and may be suitable for use as thermal storage media at temperatures of approximately 500 ºC. The required volume of a packed bed of 0.1 m particles to store the thermal energy from the exhaust of a 100 MWe gas turbine operating for 8 hours is predicted to be 24 × 103 m3, which should be sufficient to run a 25-30 MWe steam cycle for over 10 hours. This storage volume is of a similar magnitude to existing molten salt thermal storage.
AFRIKAANSE OPSOMMING: Sonenergie is die grootste energiebron wat gebruik kan word vir krag opwekking. ‘n Probleem met die gebruik van sonenergie is dat die son nie 24 uur per dag skyn nie. Dit is dus nodig om die energie te stoor indien dit nodig sal wees om elektrisiteit te genereer wanneer die son nie skyn nie. ‘n Gekombineerde kringloop kan gebruik word om ‘n hoër benuttingsgraad te bereik en elektrisiteit goedkoper te maak. Dit sal dan moontlik wees om die termiese energie uit die primêre kringloop te stoor, wat die sekondêre kringloop onafhanklik van die primêre kringloop sal maak. Dié gevalle studie ondersoek die gebruik van ‘n slakof- klipbed met lug as hitteoordragmedium, om te bepaal of dit moontlik is om hitte te stoor teen ‘n temperatuur wat hoog genoeg is om ‘n Rankine stoom kringloop te bedryf. Eksperimentele toetse is in ‘n toets-bed gedoen en die drukverandering oor die bed en die lug temperatuur is gemeet en vergelyk met voorspelde waardes van vergelykings en modelle in die literatuur. Drie soorte klippe was getoets. Die gemiddelde grootte, spesifieke hitte-kapasiteit en digtheid van elke soort klip is gemeet. Klip en slak monsters is ook siklies tussen temperature van 30 ºC en 510 ºC verkoel en verhit. Die klassieke drukverlies vergelyking gee laer waardes as wat gemeet is vir Reynolds nommers minder as 3500. Dit blyk dat die drukverlies deur ‘n klipbed afhanklik is van die lug vloeispoed tot die mag 1.8 as die Reynolds nommer groter as omtrent 500 is. Die ‘Effectiveness-NTU’ model gekombineerd met ‘n verskeidenheid van hitteoordragskoeffisiënte voorspel temperature binne 15 % van die gemete temperatuur verskil oor die bed. Doloriet en graniet klippe het 125 sikliese toetse ondergaan sonder om te breek, en is miskien gepas vir gebruik in ‘n klipbed by temperature van sowat 500 ºC Die voorspelde volume van ‘n klipbed wat uit 0.1 m klippe bestaan wat die termiese energie vir 8 ure uit die uitlaat van ‘n 100 MWe gasturbiene kan stoor, is 24 × 103 m3. Dit behoort genoeg te wees om ‘n 25 – 30 MWe stoom kringloop vir ten minste 10 ure te bedryf. Die volume is min of meer gelyk aan dié van gesmelte sout store wat alreeds gebou is.
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Darwish, Mazen. "Modular Hybridization of Solar Thermal Power Plants For Developing Nations." Thesis, KTH, Kraft- och värmeteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104456.

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The current energy scenario in the developing nations with abundant sun resource (e.g. southern Mediterranean countries of Europe, Middle-East & North Africa) relies mainly on fossil fuels to supply the increasing energy demand. Although this long adopted pattern ensures electricity availability on demand at all times through the least cost proven technology, it is highly unsustainable due to its drastic impacts on depletion of resources, environmental emissions and electricity prices. Solar thermal Hybrid power plants among all other renewable energy technologies have the potential of replacing the central utility model of conventional power plants, the understood integration of solar thermal technologies into existing conventional power plants shows the opportunity of combining low cost reliable power and Carbon emission reduction. A literature review on the current concentrating solar power (CSP) technologies and their suitability for integration into conventional power cycles was concluded, the best option was found be in the so called Integrated solar combined cycle systems (ISCCS); the plant is built and operated like a normal combined cycle, with a solar circuit consisting of central tower receiver and heliostat field adding heat to the bottoming Rankine cycle. A complete model of the cycle was developed in TRNSYS simulation software and Matlab environment, yearly satellite solar insolation data was used to study the effect of integrating solar power to the cycle throw-out the year. A multi objective thermo economic optimization analysis was conducted in order to identify a set of optimum design options. The optimization has shown that the efficiency of the combined cycle can be increased resulting in a Levelized electricity cost in the range of 10 -14 USDcts /Kwhe. The limit of annual solar share realized was found to be around 7 % The results of the study indicate that ISCCS offers advantages of higher efficiency, low cost reliable power and on the same time sends a green message by reducing the environmental impacts in our existing power plant systems.
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Books on the topic "Ocean thermal power plants"

1

Takahashi, Patrick K. Ocean thermal energy conversion. New York: John Wiley, 1996.

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Kalvaitis, A. N. Large scale OTEC pipe program: Development, experimental results, and trends. Rockville, Md: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Ocean Service, 1985.

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Marchand, Philippe. L' énergie thermique des mers. Brest: IFREMER, [1986], 1986.

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Anatolʹevich, Akulichev Viktor, and Ilʹichev V. I, eds. Volnovye ėnergeticheskie stant͡s︡ii v okeane. Moskva: "Nauka", 1989.

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P, Myers Edward, and United States. National Marine Fisheries Service., eds. The potential impact of ocean thermal energy conversion (OTEC) on fisheries. [Seattle, Wash.]: U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 1986.

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Ilʹin, A. K., and E. N. Evstafeeva. Preobrazovanie i ispolʹzovanie teplovoĭ ėnergii okeana. Vladivostok: DVO AN SSSR, 1988.

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Bank, Asian Development, ed. Wave energy conversion and ocean thermal energy conversion potential in developing member countries. Mandaluyong City, Metro Manila, Philippines: Asian Development Bank, 2014.

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Krishna, Ivan. A SOPAC desktop study of ocean-based renewable energy technologies. S.l.]: SOPAC, 2009.

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1936-, Wu Chih, ed. Renewable energy from the ocean: A guide to OTEC. New York: Oxford University Press, 1994.

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Bharathan, D. Staging Rankine cycles using ammonia for OTEC power production. Golden, CO: National Renewable Energy Laboratory, 2011.

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Book chapters on the topic "Ocean thermal power plants"

1

Iibuchi, Toshio, Seiji Kobayashi, Sigenori Nanjou, Kanako Satou, Takeya Hara, and Michiyasu Kiyono. "A Subject of the Chlorine Management at a Thermal Power Plant on the Northwest Pacific Ocean in Japan." In Marine Productivity: Perturbations and Resilience of Socio-ecosystems, 139–46. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13878-7_15.

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Becker, M., and L. L. Vant-Hull. "Thermal Receivers." In Solar Power Plants, 163–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-61245-9_5.

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Liu, Xingrang, and Ramesh Bansal. "Internet-Supported Coal-Fired Power Plant Boiler Combustion Optimization Platform." In Thermal Power Plants, 275–84. Boca Raton : Taylor & Francis, CRC Press, 2016.: CRC Press, 2016. http://dx.doi.org/10.1201/9781315371467-15.

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Kesselring, P., and C. J. Winter. "Solar Thermal Power Plants." In Solar Thermal Central Receiver Systems, 3–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82910-9_1.

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Stieglitz, Robert, and Werner Platzer. "Solar Thermal Power Plants." In Solar Thermal Energy Systems, 1103–260. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-43173-9_11.

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Grasse, W., H. P. Hertlein, C. J. Winter, and G. W. Braun. "Thermal Solar Power Plants Experience." In Solar Power Plants, 215–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-61245-9_7.

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Zohuri, Bahman, and Nima Fathi. "Nuclear Power Plants." In Thermal-Hydraulic Analysis of Nuclear Reactors, 489–523. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-17434-1_19.

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Zohuri, Bahman. "Nuclear Power Plants." In Thermal-Hydraulic Analysis of Nuclear Reactors, 649–89. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-53829-7_20.

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Geyer, M. A. "Thermal Storage for Solar Power Plants." In Solar Power Plants, 199–214. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-61245-9_6.

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Vega, Luis. "Ocean Thermal Energy Conversion." In Power Stations Using Locally Available Energy Sources, 447–80. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-7510-5_695.

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Conference papers on the topic "Ocean thermal power plants"

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Anderson, James H. "Ocean Thermal Energy Conversion (OTEC): Choosing a Working Fluid." In ASME 2009 Power Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/power2009-81211.

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Ocean thermal energy plants are thermal power plants that use warm ocean surface water as a source of heat and cold seawater from the deep ocean as a heat sink. A historical perspective along with the development of the technology will be presented. A short description describing the subtle differences between OTEC and fossil and nuclear plants will be presented. Open cycle OTEC and closed cycle OTEC will be described with a focus on the influence of choice of working fluid on the design of a plant. Various working fluids could be selected for use in closed cycle OTEC plants. A review and comparison of potential working fluids will address the advantages and disadvantages of the individual fluids. Their characteristics along with a comparison to water as a working fluid in open cycle OTEC will be explained.
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Beck, Earl J. "The Ocean Thermal Gradient Hydraulic Power Plant and Its Scope." In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37285.

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Heretofore, the concept of developing power from the tropical oceans, (Ocean Thermal Energy Conversion, or OTEC) has assumed the mooring of large platforms holding the plants in deep water to secure the coldest possible condensing water. As the Ocean Thermal Gradient Hydraulic Power Plant (OTGHPP) does not depend, on the expansion of a working fluid, other than forming a foam of steam bubbles. It does not need extremely cold water as would be dictated by Carnot’s concept of efficiency and the 2nd Law of Thermodynamics. Plants may be based on or near-shore on selected tropical islands, where cool but not extremely cold water may be available at moderate depths. This paper discusses the above possibilities and two possible plant locations, as well as projected power outputs. The location and utilization of large of amounts of power on isolated islands, where cabling of power to major population centers would not be feasible are discussed. Two that come to mind are the reduction of bauxite to produce aluminum and the of current interest is the electrolyzing of water to produce gaseous hydrogen fuel to be used in fuel cells, with oxygen as a by-product.
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Beck, Earl J. "The Prospects for Ocean Thermal Energy Conversion: The Ocean Thermal Gradient Hydraulic Power Plant." In International Joint Power Generation Conference collocated with TurboExpo 2003. ASMEDC, 2003. http://dx.doi.org/10.1115/ijpgc2003-40079.

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The Steam Lift Pump of the Ocean Thermal Gradient Hydraulic Plant is patterned after the well-known but apparently not well understood air lift pump, which is an effective but inefficient device for increasing the head on pumped liquid, usually water. Instead of pumping compressed air, an expensive and largely unsuitable gas into the bottom of the pump tube, a partial vacuum is applied to the Steam Lift Pump, at an absolute pressure just below the saturation pressure of the pumped liquid. Cavitation bubbles grow from nuclei formed by degassing the incoming liquid in a cavitating venturi of special design. The low density foam formed by the steam bubbles is pumped to a maximum theoretical height (head) about 4 times the sum of the pressure head of the immersion of the pump tube in the liquid and the head of water supported by the vacuum. The bubbles are broken, their steam content condensed and the resulting dense water flows through an hydraulic turbine.
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Sales, Joel Sena, Alexandre Texeira Alho, Roberto Valente de Souza, and Antonio Carlos Fernandes. "Preliminary Feasibility Study of an Ocean Thermal Energy Converter (OTEC) Platform for Offshore Brazil." In Offshore Technology Conference Brasil. OTC, 2023. http://dx.doi.org/10.4043/32776-ms.

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Abstract This study aims to identify the technical and operational challenges that impact the feasibility for the implementation of a 1MW (gross) Brazilian offshore Ocean Thermal Energy Conversion (OTEC) pilot plant. The OTEC technology utilizes the thermal gradient available between different layers (and depths) in the ocean to operate a heat engine to produce power output. It is expected to become mature enough to establish commercial power plants. The analysis is done by using coupled models in which ocean characteristics, the sizing of engineering apparatus and operational aspects of an OTEC plant are taken into account. A closed Rankine cycle with ammonia as the working fluid was considered for the plant. The Brazilian Blue Amazon is a geographic region defined along the Brazilian coast with a high potential for thermal gradient applications due to temperature gradients of more than 20 °C between sea surface and water depths of 600m z 1000 m throughout the year. This study focuses in such region, called CHT field, in Campos Basin. Campos Basin is an attractive location suitable for offshore floating OTEC plants in Blue Amazon that is also located near the Brazilian Offshore Oil fields. Because of this, a synergy may appear between Offshore Oil Production know-how and floating OTEC applications, since its clean and renewable energy source may also be used to Decarbonize FPSOs and other offshore structures. The available thermal power is analyzed in terms of an average annual estimated for the CHTfield, based on different thermal gradients. For each thermal gradient, the mass flows of sea Hot Water Pipe (HWP) and Cold Water Pipe (CWP), Working Fluid (WF), the pipe diameters, the WT, HWP and CWP pump capacities, and operational parameters of the offshore OTEC plant are calculated. One of the outcomes of this study is the possibility of analyzing greater operational capacities of offshore OTEC plants, such as 10 and 100 MW.
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Upshaw, Charles R., and Michael E. Webber. "Integrated Thermal-Fluids System Modeling of an Ocean Thermal Energy Conversion Power Plant for Analysis and Optimization." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54595.

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This report focuses on the development of an integrated model of a closed-cycle Ocean Thermal Energy Conversion (OTEC) power plant for the purpose of analyzing the relative effects of key design parameters on the performance of the plant’s main sub-systems. The model was then used to analyze the effects of cascaded stages within the power cycle, as an example of using the model for analysis and optimization. The analysis led to the conclusion that 2–5 stages are most beneficial. A simplified thermodynamic model of the power cycle was developed to estimate the power produced, as well as the water mass flow rates required for the necessary heating and cooling rates. A simplified pipe flow model was then integrated into the power plant model to calculate the pumping power required to run the power cycle. The pumping power demand was subtracted off the thermodynamic model to provide the net power out of the cycle. Since the thermodynamic efficiency of the OTEC power cycle is inherently low, the water flow rates are substantial, and so are the power requirements of their pumps. Therefore, it is important to optimize the design parameters of an OTEC plant to minimize water mass flow rate relative to the power output of the plant. The thermodynamic performance analysis consists of first establishing a base-line reference power plant and a reference set of input variables. Plant design variables, such as the number of power cycle stages, are then varied up and down about the reference point; the outputs are then compared to the reference output.
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Wang, Jiang-Jiang, You-Yin Jing, and Jun-Hong Zhao. "Multi Criteria Evaluation Model of Renewable Energy Power Plants Based on ELECTRE Method." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90104.

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The feasibility evaluation of renewable energy power plants from multi criteria is necessary to save energy, protect environment and develop technology. This paper employs the improved elimination et choice translating reality (ELECTRE) method to evaluate 10 kinds of energy power plants in five criteria. The plants includes the coal fired, solar-thermal, geothermal, biomass, nuclear, photovoltaic solar, wind, ocean, hydro and natural gas combined cycle power plants. The evaluation criteria reflects four aspects from the technology, economy, environment and society. The concrete criteria are efficiency, installation, electricity cost, CO2 emission, and land requirement. Finally, the multi criteria evaluations show that the hydro power plant in the renewable energy are the optimal schemes at present.
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Srinivasan, Nagan, Meena Sridhar, and Madhusuden Agrawal. "Study on the Cost Effective Ocean Thermal Energy Convertion Power Plant." In Offshore Technology Conference. Offshore Technology Conference, 2010. http://dx.doi.org/10.4043/20340-ms.

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Lee, Ho-Saeng, Seung-Won Lee, Hyeon-Ju Kim, and Young-Kwon Jung. "Performance Characteristics of 20kW Ocean Thermal Energy Conversion Pilot Plant." In ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/es2015-49768.

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To experiment 20kW OTEC, the closed-cycle type of OTEC (Ocean Thermal Energy Conversion) was designed and manufactured. R32 (Difluoromethane, CH2F2) was used as the working fluid and a temperature of heat source and heat sink is 26°C, 5°C, respectively. The semi-welded type heat exchanger is applied for the evaporator and condenser and the cycle was designed for the gross power of 20kW. In the plate arrangement of the semi-welded type heat exchanger, one channel for working fluid is welded, and another channel for seawater is sealed by gasket. In this paper, various performance evaluations and experiments were carried out as constructing subminiature pilot plant of the OTEC and compared with the results of cycle analysis. In results, gross power of the turbine shows 20.1kW and cycle efficiency is 1.91% when heat source and heat sink is 26°C, 5°C. For the variation of temperature difference between the heat source and heat sink, when the temperature difference was 21°C, the gross power increased by about 33.3% from that when the temperature difference was 19 °C.
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Najafi, Alireza, Shahab Rezaee, and Farschad Torabi. "Sensitivity analysis of a closed cycle ocean thermal energy conversion power plant." In 2012 Iranian Conference on Renewable Energy and Distributed Generation (ICREDG). IEEE, 2012. http://dx.doi.org/10.1109/icredg.2012.6190461.

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Najafi, Alireza, Shahab Rezaee, and Farschad Torabi. "Multi-objective optimization of ocean thermal energy conversion power plant via genetic algorithm." In Energy Conference (EPEC). IEEE, 2011. http://dx.doi.org/10.1109/epec.2011.6070237.

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Reports on the topic "Ocean thermal power plants"

1

Linker, K. Heat engine development for solar thermal dish-electric power plants. Office of Scientific and Technical Information (OSTI), November 1986. http://dx.doi.org/10.2172/7228892.

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Determan, J. C., and C. E. Hendrix. Survey of thermal-hydraulic models of commercial nuclear power plants. Office of Scientific and Technical Information (OSTI), December 1992. http://dx.doi.org/10.2172/6983550.

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3

Drost, M. K., Z. I. Antoniak, D. R. Brown, and S. Somasundaram. Thermal energy storage for integrated gasification combined-cycle power plants. Office of Scientific and Technical Information (OSTI), July 1990. http://dx.doi.org/10.2172/6624383.

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4

Determan, J. C., and C. E. Hendrix. Survey of thermal-hydraulic models of commercial nuclear power plants. Office of Scientific and Technical Information (OSTI), December 1992. http://dx.doi.org/10.2172/10128992.

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Leidenfrost, W., P. Liley, A. McDonald, I. Mudawwar, and J. Pearson. Performance assessment of OTEC power systems and thermal power plants. Final report. Volume I. Office of Scientific and Technical Information (OSTI), May 1985. http://dx.doi.org/10.2172/5464301.

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Kuver, Walt. Tax Revenue and Job Benefits from Solar Thermal Power Plants in Nye County. Office of Scientific and Technical Information (OSTI), November 2009. http://dx.doi.org/10.2172/1129448.

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Gawlik, Keith. Reducing the Cost of Thermal Energy Storage for Parabolic Trough Solar Power Plants. Office of Scientific and Technical Information (OSTI), June 2013. http://dx.doi.org/10.2172/1090094.

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Knighton, Lane, Amey Shigrekar, Daniel Wendt, and Brian Murphy. Markets and Economics for Thermal Power Extraction from Nuclear Power Plants aiding the Decarbonization of Industrial Processes. Office of Scientific and Technical Information (OSTI), June 2020. http://dx.doi.org/10.2172/1692372.

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Wang, D. Far-field model of the regional influence of effluent plumes from ocean thermal energy conversion (OTEC) plants. Office of Scientific and Technical Information (OSTI), July 1985. http://dx.doi.org/10.2172/5451995.

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Byers, R. Application of RELAP4/MOD6 to analysis of solar-thermal power plants: control system modelling. Office of Scientific and Technical Information (OSTI), April 1986. http://dx.doi.org/10.2172/5554016.

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