Готові списки джерел за темами / Concentrated solar thermal energy

Добірка наукової літератури з теми "Concentrated solar thermal energy"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Concentrated solar thermal energy"

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Ahmad, S. Q. S., R. J. Hand, and C. Wieckert. "Glass melting using concentrated solar thermal energy." Glass Technology: European Journal of Glass Science and Technology Part A 58, no. 2 (April 11, 2017): 41–48. http://dx.doi.org/10.13036/17533546.58.2.012.

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Panchenko, Vladimir. "Photovoltaic Thermal Module With Paraboloid Type Solar Concentrators." International Journal of Energy Optimization and Engineering 10, no. 2 (April 2021): 1–23. http://dx.doi.org/10.4018/ijeoe.2021040101.

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The article presents the results of the development and research of the solar photovoltaic thermal module with paraboloid type solar radiation concentrators. The structure of the solar module includes a composite concentrator, which provides uniform illumination by concentrated solar radiation on the surface of the cylindrical photovoltaic thermal photoreceiver in the form of the aluminum radiator with photovoltaic converters. When exposed in concentrated solar radiation, the electrical efficiency of specially designed matrix photovoltaic converters increases, and the heat taken by the heat carrier increases the overall efficiency of the solar module. Uniform illumination of photovoltaic converters with concentrated solar radiation provides an optimal mode of operation. The consumer can use the received electric and thermal energy in an autonomous or parallel power supply with the existing power grid.
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Tamaura, Yutaka. "Conversion of Concentrated Solar Thermal Energy into Chemical Energy." AMBIO 41, S2 (March 2012): 108–11. http://dx.doi.org/10.1007/s13280-012-0264-7.

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Fernández-González, Daniel, Janusz Prazuch, Íñigo Ruiz-Bustinza, Carmen González-Gasca, Juan Piñuela-Noval, and Luis Verdeja González. "Iron Metallurgy via Concentrated Solar Energy." Metals 8, no. 11 (October 25, 2018): 873. http://dx.doi.org/10.3390/met8110873.

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Анотація:
Environmental protection is deeply rooted in current societies. In this context, searching for new environmentally friendly energy sources is one of the objectives of industrial policies in general, and of the metallurgical industries in particular. One of these energy sources is solar energy, which offers a great potential in high temperature applications, such as those required in metallurgy processes, when properly concentrated. In this paper, we propose the utilization of concentrated solar energy in ironmaking. We have studied the utilization of concentrated solar thermal in the agglomeration of iron ore mixtures and in the obtaining of iron via reduction with carbon (and coke breeze). The results from the experiments show the typical phases of the iron ore sinters and the presence of iron through smelting reduction.
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Singh, Harwinder, and R. S. Mishra. "Perfortmance Evaluations of Concentrated Solar Thermal Power Technology." International Journal of Advance Research and Innovation 4, no. 1 (2016): 263–71. http://dx.doi.org/10.51976/ijari.411638.

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Анотація:
This review work consists of detailed description on various types of research in the field of solar thermal systems and various methods to improve the performance of the collector systems. Concentrated solar thermal systems are the highly advanced and large scale technology, which is used to generate the thermal energy and converted it in to electric energy through the application of power producing device coupled with the collector systems, therefore from the research point of view improvement in the working performance of the solar thermal system is highly important to achieve the better efficient device.
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Mendecka, B., L. Lombardi, and Pawel Gladysz. "Waste to energy efficiency improvements: Integration with solar thermal energy." Waste Management & Research: The Journal for a Sustainable Circular Economy 37, no. 4 (March 8, 2019): 419–34. http://dx.doi.org/10.1177/0734242x19833159.

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Hybridisation of waste to energy with solar facility can take competing energy technologies and make them complementary. However, realising the benefits of solar integration requires careful consideration of the technical feasibility as well as the economic and environmental benefits of a proposed system. In this work, a solar-integrated waste-to-energy plant scheme is proposed and analysed from an energy, environmental and economic point of view. The new system integrates a traditional waste-to-energy plant with a concentrated solar power plant, by superheating the steam produced by the waste-to-energy flue gas boiler in the solar facility. The original waste-to-energy plant – that is, the base case before introducing the integration with concentrated solar power – has a thermal power input of 50 MW and operates with superheated steam at 40 bar and 400 °C; net power output is 10.7 MW, and the net energy efficiency is equal to 21.65%. By combining waste-to-energy plant with the solar facility, the power plant could provide higher net efficiency (from 1.4 to 3.7 p.p. higher), lower specific CO2 emissions (from 69 to 180 kg MWh-1 lower) and lower levellised cost of electricity (from 13.4 to 42.3 EUR MWh-1 lower) comparing with the standalone waste to energy case. The study shows that: (i) in the integrated case and for the increasing steam parameters energy, economic and ecological performances are improved; (ii) increasing the solar contribution could be an efficient way to improve the process and system performances. In general, we can conclude that concentrated solar-power technology holds significant promise for extending and developing the waste to energy systems.
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Thirunavukkarasu, V., and M. Cheralathan. "Thermal Performance of Solar Parabolic Dish Concentrator with Hetero-Conical Cavity Receiver." Applied Mechanics and Materials 787 (August 2015): 197–201. http://dx.doi.org/10.4028/www.scientific.net/amm.787.197.

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Concentrated solar collectors have high efficiency as compared to flat plate and evacuated tube solar collectors. Cavity receivers are mainly used on the parabolic dish concentrators and tower type concentrator systems. The heat transfer surfaces of cavity receiver are composed by coiled metal tube. Heat transfer fluid flows in the internal spaces of coiled metal tube, and the external surfaces would absorb the highly concentrated solar energy. This paper explains the thermal performance of parabolic dish concentrator system with hetero-conical cavity receiver. The experimental analysis was done during the month of April 2014 on clear sunny days at Chennai [Latitude: 13.08oN, Longitude: 80.27oE] to study its thermal performance.
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Al-Kouz, Wael, Jamal Nayfeh, and Alberto Boretti. "Design of a parabolic trough concentrated solar power plant in Al-Khobar, Saudi Arabia." E3S Web of Conferences 160 (2020): 02005. http://dx.doi.org/10.1051/e3sconf/202016002005.

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The paper discusses the design options for a concentrated solar power plant in Al-Khobar, Saudi Arabia. The specific conditions, in terms of weather and sun irradiance, are considered, including sand and dust, humidity, temperature and proximity to the sea. Different real-world experiences are then considered, to understand the best design to adapt to the specific conditions. Concentrated solar power solar tower with thermal energy storage such as Crescent Dunes, or concentrated solar power solar tower without thermal energy storage but boost by natural gas combustion such as Ivanpah are disregarded for the higher costs, the performances well below the design, and the extra difficulties for the specific location such as temperatures, humidity and sand/dust that suggest the use of an enclosed trough. Concentrated solar power parabolic trough without thermal energy storage such as Genesis or Mojave, of drastically reduced cost and much better performances, do not provide however the added value of thermal energy storage and dispatchability that can make interesting Concentrated solar power vs. alternatives such as wind and solar photovoltaic. Thus, the concentrated solar power parabolic trough with thermal energy storage of Solana, of intermediate costs and best performances, albeit slightly lower than the design values, is selected. This design will have to be modified to enclosed trough and adopt a Seawater, Once-trough condenser. Being the development peculiar, a small scale pilot plant is suggested before a full-scale development.
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Wagner, Sharon J., and Edward S. Rubin. "Economic implications of thermal energy storage for concentrated solar thermal power." Renewable Energy 61 (January 2014): 81–95. http://dx.doi.org/10.1016/j.renene.2012.08.013.

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Baltes, Liana, Silvia Patachia, Ozgur Ekincioglu, Hulusi Ozkul, Catalin Croitoru, Corneliu Munteanu, Bogdan Istrate, and Mircea Tierean. "Polymer-Cement Composites Glazing by Concentrated Solar Energy." Coatings 11, no. 3 (March 18, 2021): 350. http://dx.doi.org/10.3390/coatings11030350.

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Анотація:
Macro defect free (MDF) cements are polymer-cement composites characterized by high biaxial flexural strength compared to traditional concrete, having as a drawback a low water resistance. Glazing these composite materials with an inorganic enamel containing TiO2 nano-particles has led to a high water-stable material with advanced photocatalytic properties. Classic glazing by thermal treatment of samples, at 1050 °C, requires energy consumption and long-time performing. The purpose of this paper is to test the use of solar radiation as a source of energy in the glazing process. A vertical axis solar furnace has been used, from PROMES-CNRS Solar Laboratory, Font-Romeu Odeillo, France, and it has been observed that a uniform appearance of the glaze coating has been achieved; it shows high scratch resistance, meaning a good hardness and adhesion to the substrate. The obtained film was also characterized by SEM, EDS and XRD, aiming to evidence the coat morphology, the TiO2 distribution and its crystallinity alteration, when compared to the samples obtained by classic thermal treatment. The conclusion of the paper is that using solar radiation in the MDF cement glazing process is a promising approach for obtaining multifunctional materials.
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Більше джерел

Дисертації з теми "Concentrated solar thermal energy"

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Onigbajumo, Adetunji. "Integration of concentrated solar thermal energy for industrial hydrogen production." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/235889/1/Adetunji%2BOnigbajumo_Thesis%281%29.pdf.

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Анотація:
The research demonstrated a balanced process, energy, and techno-economic argument for the utilisation of concentrated solar thermal energy, essentially, for hydrogen production and other industrial process systems. The representative case studies undertaken in the research addressed process and solar thermal energy modelling, energy integration, process optimisation, exergy assessment, and techno-economic evaluation as it relates to renewable hydrogen and hydrogen-based fuel production. The research established that economic assessment studies, process-energy configuration, choice of renewable energy, and mixed energy options are key to the shift from fossil fuel to green energy and industrial production to significantly reduce the impact of climate change.
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Javadian-Deylami, Seyd Payam. "Metal Hydrides as Energy Storage for Concentrated Solar Thermal Applications." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/58986.

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Hydrogen storage properties of LiBH4 may be changed by interaction with other complex hydrides due to an intimate interaction between the respective alkaline metals and boron which facilitate a relatively larger hydrogen storage capacity. The cyclic stability of the following binary complex hydride systems LiBH4-Ca(BH4)2, LiBH4-NaBH4 and LiBH4-NaAlH4 shows significant reversibility and due to their relative high gravimetric H2 storage capacity and specific heat storage capacity, they may potentially act as heat storage materials.
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Guerreiro, Luís. "Energy optimization of a concentrated solar power plant with thermal storage." Doctoral thesis, Universidade de Évora, 2016. http://hdl.handle.net/10174/25594.

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Анотація:
One of the most relevant problems to solve at a planetary scale is the access to an affordable clean source of energy as CO2 equivalent emissions should be reduced significantly. Some authors aim for a zero emissions target for 2050. Renewable energies will play a leading role in this energy transition, and solar energy with storage is a promising technology exploring a renewable and worldwide available resource. Within the present thesis component development like a new thermal storage thermocline tank design or having latent heat storage capability are technological developments that have been pursued and analyzed on a system perspective basis, focusing on reducing the LCOE value of a commercial STE plant using TRNSYS software. Material research with molten salts mixtures and cement based materials has been performed at lab scale. A fully validation should occur through a 13 partners pan-European H2020 project called NEWSOL which has been developed supported on the laboratory data obtained. Moreover, incorporation of local available material, “modern slag” from an old mine of Alentejo region, was also studied. The material could be used as an aggregate incorporated into calcium aluminate cement (CAC) or as filler. This would help to solve a local environmental complex problem related to soil, air and water pollution due to heavy metals and mining activity in Mina de São Domingos, Southeast of Portugal. The integration of these results underlies a broad energy transition model, a proposal is presented in this thesis, with the aim to foster development towards a sustainable usage of resources and promote clean technologies especially in the energy sector. This model can be locally adapted depending on the pattern of existing industries. The goal is to achieve a smooth transition into a clean tech energy society in line with the target of achieving zero emissions for 2050; Optimização Energética de uma Central de Concentração Solar com Armazenamento de Energia Resumo: Um dos problemas mais relevantes a resolver a uma escala planetária é o acesso, com um custo moderado, a fontes limpas de energia considerando que as emissões equivalentes de CO2 derão ser reduzidas drasticamente. Alguns autores ambicionam mesmo um objetivo de zero emissões em 2050. As energias renováveis irão desempenhar um papel preponderante nesta transição energética, sendo que a energia solar com armazenamento é uma tecnologia promissora que aproveita um recurso renovável e disponível em boa parte do Planeta. Na presente tese foi realizado o desenvolvimento de componentes nomeadamente o design que um novo tanque do tipo termocline, ou de novos elementos recorrendo ao calor latente, desenvolvimentos tecnológicos que foram analizados de uma perspectiva de sistema, dando o enfoque na redução do custo nivelado da electricidade (LCOE) para uma planta Termosolar usando o software TRNSYS. Foi também realizada investigação em laboratório ao nível dos materiais com várias misturas de sais fundidos inclusivé em contacto directo com materiais de base cimenticia. Uma validação completa deverá ocorrer no projeto NEWSOL do programa H2020 que reúne um consórcio de 13 parceiros europeus e que foi preparado e submetido tendo por base os resultados laboratoriais obtidos. Adicionalmente, incorporação de material disponível (escória de minério) de uma mina abandonada da região do Alentejo foi outro dos aspectos estudados. Verificou-se que este material poderá ser utilizado como agregado num ligante do tipo cimento de aluminato de cálcio (CAC) ou como “filler”. Este re-aproveitamento resolveria um problema ambiental complexo derivado do elevado conteúdo de metais pesados resultantes da actividade de mineração e que actualamente provocam poluição do solo, água e ar na área da Mina de São Domingos, Sudeste de Portugal. Estes progressos deverão ser integrados num modelo de transição energética mais amplo. Na presente tese, uma proposta concreta é apresentada, com o objectivo de incentivar o desenvolvimento na direção de uma utilização sustentável dos recursos e a promoção de tecnologias limpas nomeadamente no sector da energia. Este modelo poderá ser adaptado localmente dependendo do padrão de indústrias existente. O objectivo é atingir uma transição suave para uma sociedade de energias limpas em linha com o objectivo de atingir zero emissões de CO2 equivalente em 2050.
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Miranda, Gilda. "Dispatch Optimizer for Concentrated Solar Power Plants." Thesis, Uppsala universitet, Byggteknik och byggd miljö, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-402436.

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Анотація:
Concentrating solar power (CSP) plant is a promising technology that exploits direct normal irradiation (DNI) from the sun to be converted into thermal energy in the solar field. One of the advantages of CSP technology is the possibility to store thermal energy in thermal energy storage (TES) for later production of electricity. The integration of thermal storage allows the CSP plant to be a dispatchable system which is defined as having a capability to schedule its operation using an innovative dispatch planning tool. Considering weather forecast and electricity price profile in the market, dispatch planning tool uses an optimization algorithm. It aims to shift the schedule of electricity delivery to the hours with high electricity price. These hours are usually reflected by the high demand periods. The implementation of dispatch optimizer can benefit the CSP plants economically from the received financial revenues. This study proposes an optimization of dispatch planning strategies for the parabolic trough CSP plant under two dispatch approaches: solar driven and storage driven. The performed simulation improves the generation of electricity which reflects to the increase of financial revenue from the electricity sale in both solar and storage driven approaches. Moreover, the optimization also proves to reduce the amount of dumped thermal energy from the solar field.
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5

Strand, Anna. "Optimization of energy dispatch in concentrated solar power systems : Design of dispatch algorithm in concentrated solar power tower system with thermal energy storage for maximized operational revenue." Thesis, KTH, Kraft- och värmeteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264410.

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Анотація:
Concentrated solar power (CSP) is a fast-growing technology for electricity production. With mirrors (heliostats) irradiation of the sun is concentrated onto a receiver run through by a heat transfer fluid (HTF). The fluid by that reaches high temperatures and is used to drive a steam turbine for electricity production. A CSP power plant is most often coupled with an energy storage unit, where the HTF is stored before it is dispatched and used to generate electricity. Electricity is most often sold at an open market with a fluctuating spot-prices. It is therefore of high importance to generate and sell the electricity at the highest paid hours, increasingly important also since the governmental support mechanisms aimed to support renewable energy production is faded out since the technology is starting to be seen as mature enough to compete by itself on the market. A solar power plant thus has an operational protocol determining when energy is dispatched, and electricity is sold. These protocols are often pre-defined which means an optimal production is not achieved since irradiation and electricity selling price vary. In this master thesis, an optimization algorithm for electricity sales is designed (in MATLAB). The optimization algorithm is designed by for a given timeframe solve an optimization problem where the objective is maximized revenue from electricity sales from the solar power plant. The function takes into consideration hourly varying electricity spot price, hourly varying solar field efficiency, energy flows in the solar power plant, start-up costs (from on to off) plus conditions for the logic governing the operational modes. Two regular pre-defined protocols were designed to be able to compare performance in a solar power plant with the optimized dispatch protocol. These three operational protocols were evaluated in three different markets; one with fluctuating spot price, one regulated market of three fixed price levels and one in spot market but with zero-prices during sunny hours. It was found that the optimized dispatch protocol gave both bigger electricity production and revenue in all markets, but with biggest differences in the spot markets. To evaluate in what type of powerplant the optimizer performs best, a parametric analysis was made where size of storage and power block, the time-horizon of optimizer and the cost of start-up were varied. For size of storage and power block it was found that revenue increased with increased size, but only up to the level where the optimizer can dispatch at optimal hours. After that there is no increase in revenue. Increased time horizon gives increased revenue since it then has more information. With a 24-hour time horizon, morning price-peaks will be missed for example. To change start-up costs makes the power plant less flexible and with fewer cycles, without affect income much.
Koncentrerad solkraft (CSP) är en snabbt växande teknologi för elektricitets-produktion. Med speglar (heliostater) koncentreras solstrålar på en mottagare som genomflödas av en värmetransporteringsvätska. Denna uppnår därmed höga temperaturer vilket används för att driva en ångturbin för att generera el. Ett CSP kraftverk är oftast kopplat till en energilagringstank, där värmelagringsvätskan lagras innan den används för att generera el. El säljs i de flesta fall på en öppen elmarknad, där spotpriset fluktuerar. Det är därför av stor vikt att generera elen och sälja den vid de timmar med högst elpris, vilket också är av ökande betydelse då supportmekanismerna för att finansiellt stödja förnybar energiproduktion används i allt mindre grad för denna teknologi då den börjar anses mogen att konkurrera utan. Ett solkraftverk har således ett driftsprotokoll som bestämmer när el ska genereras. Dessa protokoll är oftast förutbestämda, vilket innebär att en optimal produktion inte fås då exempelvis elspotpriset och solinstrålningen varierar. I detta examensarbete har en optimeringsalgoritm för elförsäljning designats (i MATLAB). Optimeringsscriptet är designat genom att för en given tidsperiod lösa ett optimeringsproblem där objektivet är maximerad vinst från såld elektricitet från solkraftverket. Funktionen tar hänsyn till timvist varierande elpris, timvist varierande solfältseffektivitet, energiflöden i solkraftverket, kostnader för uppstart (on till off) samt villkor för att logiskt styra de olika driftlägena. För att jämföra prestanda hos ett solkraftverk med det optimerade driftsprotokollet skapades även två traditionella förutbestämda driftprotokoll. Dessa tre driftsstrategier utvärderades i tre olika marknader, en med ett varierande el-spotpris, en i en reglerad elmarknad med tre prisnivåer och en i en marknad med spotpris men noll-pris under de soliga timmarna. Det fanns att det optimerade driftsprotokollet gav både större elproduktion och högre vinst i alla marknader, men störst skillnad fanns i de öppna spotprismarknaderna. För att undersöka i vilket slags kraftverk som protokollet levererar mest förbättring i gjordes en parametrisk analys där storlek på lagringstank och generator varierades, samt optimerarens tidshorisont och kostnad för uppstart. För lagringstank och generator fanns att vinst ökar med ökande storlek upp tills den storlek optimeraren har möjlighet att fördela produktion på dyrast timmar. Ökande storlek efter det ger inte ökad vinst. Ökande tidshorisont ger ökande vinst eftersom optimeraren då har mer information. Att ändra uppstartkostnaden gör att solkraftverket uppträder mindre flexibelt och har färre cykler, dock utan så stor påverkan på inkomst.
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Wagner, Sharon J. "Environmental and Economic Implications of Thermal Energy Storage for Concentrated Solar Power Plants." Research Showcase @ CMU, 2011. http://repository.cmu.edu/dissertations/682.

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7

Khan, Fahad. "Spherical Tanks for Use in Thermal Energy Storage Systems." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-dissertations/187.

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Анотація:
Thermal energy storage (TES) systems play a crucial part in the success of concentrated solar power as a reliable thermal energy source. The economics and operational effectiveness of TES systems are the subjects of continuous research for improvement, in order to lower the localized cost of energy (LCOE). This study investigates the use of spherical tanks and their role in sensible heat storage in liquids. In the two tank system, typical cylindrical tanks were replaced by spherical tanks of the same volume and subjected to heat loss, stress analysis, and complete tank cost evaluation. The comparison revealed that replacing cylindrical tanks by spherical tanks in two tank molten salt storage systems could result in a 30% reduction in heat loss from the wall, with a comparable reduction in total cost. For a one tank system (or thermocline system), a parametric computational fluid dynamic (CFD) study was performed in order to obtain fluid flow parameters that govern the formation and maintenance of a thermocline in a spherical tank. The parametric study involved the following dimensionless numbers: Re (500-7500), Ar (0.5-10), Fr (0.5-3), and Ri (1-100). The results showed that within the examined range of flow characteristics, the inlet Fr number is the most influential parameter in spherical tank thermocline formation and maintenance, and the largest tank thermal efficiency in a spherical tank is achieved at Fr = 0.5. Experimental results were obtained to validate the CFD model used in the parametric study. For the flow parameters within the current model, the use of an eddy viscosity turbulence model with variable turbulence intensity delivered the best agreement with experimental results. Overall, the experimental study using a spherical one tank setup validated the results of the CFD model with acceptable accuracy.
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Mahdavi, Mahboobe. "NUMERICAL AND EXPERIMENTAL ANALYSIS OF HEAT PIPES WITH APPLICATION IN CONCENTRATED SOLAR POWER SYSTEMS." Diss., Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/400193.

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Анотація:
Mechanical Engineering
Ph.D.
Thermal energy storage systems as an integral part of concentrated solar power plants improve the performance of the system by mitigating the mismatch between the energy supply and the energy demand. Using a phase change material (PCM) to store energy increases the energy density, hence, reduces the size and cost of the system. However, the performance is limited by the low thermal conductivity of the PCM, which decreases the heat transfer rate between the heat source and PCM, which therefore prolongs the melting, or solidification process, and results in overheating the interface wall. To address this issue, heat pipes are embedded in the PCM to enhance the heat transfer from the receiver to the PCM, and from the PCM to the heat sink during charging and discharging processes, respectively. In the current study, the thermal-fluid phenomenon inside a heat pipe was investigated. The heat pipe network is specifically configured to be implemented in a thermal energy storage unit for a concentrated solar power system. The configuration allows for simultaneous power generation and energy storage for later use. The network is composed of a main heat pipe and an array of secondary heat pipes. The primary heat pipe has a disk-shaped evaporator and a disk-shaped condenser, which are connected via an adiabatic section. The secondary heat pipes are attached to the condenser of the primary heat pipe and they are surrounded by PCM. The other side of the condenser is connected to a heat engine and serves as its heat acceptor. The applied thermal energy to the disk-shaped evaporator changes the phase of working fluid in the wick structure from liquid to vapor. The vapor pressure drives it through the adiabatic section to the condenser where the vapor condenses and releases its heat to a heat engine. It should be noted that the condensed working fluid is returned to the evaporator by the capillary forces of the wick. The extra heat is then delivered to the phase change material through the secondary heat pipes. During the discharging process, secondary heat pipes serve as evaporators and transfer the stored energy to the heat engine. Due to the different geometry of the heat pipe network, a new numerical procedure was developed. The model is axisymmetric and accounts for the compressible vapor flow in the vapor chamber as well as heat conduction in the wall and wick regions. Because of the large expansion ratio from the adiabatic section to the primary condenser, the vapor flow leaving the adiabatic pipe section of the primary heat pipe to the disk-shaped condenser behaves similarly to a confined jet impingement. Therefore, the condensation is not uniform over the main condenser. The feature that makes the numerical procedure distinguished from other available techniques is its ability to simulate non-uniform condensation of the working fluid in the condenser section. The vapor jet impingement on the condenser surface along with condensation is modeled by attaching a porous layer adjacent to the condenser wall. This porous layer acts as a wall, lets the vapor flow to impinge on it, and spread out radially while it allows mass transfer through it. The heat rejection via the vapor condensation is estimated from the mass flux by energy balance at the vapor-liquid interface. This method of simulating heat pipe is proposed and developed in the current work for the first time. Laboratory cylindrical and complex heat pipes and an experimental test rig were designed and fabricated. The measured data from cylindrical heat pipe were used to evaluate the accuracy of the numerical results. The effects of the operating conditions of the heat pipe, heat input, and portion of heat transferred to the phase change material, main condenser geometry, primary heat pipe adiabatic radius and its location as well as secondary heat pipe configurations have been investigated on heat pipe performance. The results showed that in the case with a tubular adiabatic section in the center, the complex interaction of convective and viscous forces in the main condenser chamber, caused several recirculation zones to form in this region, which made the performance of the heat pipe convoluted. The recirculation zone shapes and locations affected by the geometrical features and the heat input, play an important role in the condenser temperature distributions. The temperature distributions of the primary condenser and secondary heat pipe highly depend on the secondary heat pipe configurations and main condenser spacing, especially for the cases with higher heat inputs and higher percentages of heat transfer to the PCM via secondary heat pipes. It was found that changing the entrance shape of the primary condenser and the secondary heat pipes as well as the location and quantity of the secondary heat pipes does not diminish the recirculation zone effects. It was also concluded that changing the location of the adiabatic section reduces the jetting effect of the vapor flow and curtails the recirculation zones, leading to higher average temperature in the main condenser and secondary heat pipes. The experimental results of the conventional heat pipe are presented, however the data for the heat pipe network is not included in this dissertation. The results obtained from the experimental analyses revealed that for the transient operation, as the heat input to the system increases and the conditions at the condenser remains constant, the heat pipe operating temperature increases until it reaches another steady state condition. In addition, the effects of the working fluid and the inclination angle were studied on the performance of a heat pipe. The results showed that in gravity-assisted orientations, the inclination angle has negligible effect on the performance of the heat pipe. However, for gravity-opposed orientations, as the inclination angle increases, the temperature difference between the evaporator and condensation increases which results in higher thermal resistance. It was also found that if the heat pipe is under-filled with the working fluid, the capillary limit of the heat pipe decreases dramatically. However, overfilling of the heat pipe with working fluid degrades the heat pipe performance due to interfering with the evaporation-condensation mechanism.
Temple University--Theses
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9

Ruiz-Cabañas, F. Javier. "Corrosion evaluation of molten salts thermal energy storage (TES) systems in concentrated solar power plants (CSP)." Doctoral thesis, Universitat de Lleida, 2020. http://hdl.handle.net/10803/671680.

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El protagonisme creixent de la tecnologia solar termoelèctrica entre el ventall de les energies renovables es centra en la seva capacitat d’adaptar la seva producció a la demanda energètica exigida. La gestionabilitat d’aquest tipus de centrals s’ha aconseguit amb la integració de sistemes d’emmagatzematge tèrmic en les mateixes. La major part dels sistemes d’emmagatzematge tèrmic, ja sigui els que s’utilitzen a nivell comercial com aquells que es troben en fase de desenvolupament proposen l’ús de sals inorgàniques foses com a medi d’emmagatzematge. Aquestes sals presenten l’inconvenient de la seva alta corrosivitat a altes temperatures. Per un costat, s’han analitzat els fenòmens de corrosió associats a les sals solars utilitzades a la planta pilot TES-PS10 mitjançant la instal·lació de racks de testimonis de corrosió als tancs de sals. A més, al finalitzar l’operació de la instal·lació pilot s’ha dut a terme un estudi post-mortem dels seus. Finalment, amb l’objectiu d’abaratir el cost de l’inventari de sals, s’ha analitzat a nivell de laboratori la corrosivitat de diferents mescles de nitrats de baixa puresa. El segon bloc de la tesi es centra en els sistemes d’emmagatzematge tèrmic en calor latent. Concretament, s’analitza la corrosió associada a la mescla peritèctica 46% LiOH-54% KOH proposta com a material de canvi de fase en un mòdul d’evaporació d’instal·lacions termoelèctriques de generació directa de vapor. D’aquesta forma, s’han dut a terme una sèrie d’assajos a nivell de laboratori amb l’objectiu d’avaluar el comportament envers la corrosió de diferents materials en contacte amb aquests hidròxids.
El creciente protagonismo de la tecnología solar se centra en su capacidad para adaptar su producción a la demanda energética exigida. La gestionabilidad de este tipo de centrales se ha conseguido mediante la integración de sistemas de almacenamiento térmico en sales fundidas. El uso de sales fundidas en sistemas de almacenamiento térmico presenta el hándicap de su corrosividad a alta temperatura. El primer bloque de la Tesis analiza los fenómenos de corrosión asociados a las sales solares en la planta piloto TES-PS10 mediante la instalación de racks de corrosión en los tanques de sales. Además, se ha llevado a cabo un estudio post-mortem de componentes de la instalación. Finalmente, se ha analizado a nivel de laboratorio la corrosividad de distintas mezclas de nitrato de baja pureza. El segundo bloque de la tesis se centra en los sistemas de almacenamiento en calor latente. En concreto, se analiza la corrosión asociada a la mezcla peritéctica 46% LiOH-54% KOH propuesta como material de cambio de fase en el módulo de evaporación en plantas de generación directa de vapor. De este modo, se han llevado a cabo ensayos de corrosión a nivel de laboratorio para evaluar el comportamiento a corrosión de distintos materiales en contacto con los hidróxidos.
The growing of concentrated solar power (CSP) within the different renewable energies is due to its ability to adapt the production to the required energy demand. The dispatchability of this type of plants has been achieved through the integration of molten salts thermal storage systems (TES). Molten salts have a handicap associated to their corrosiveness at high temperature. First block of this Thesis analyzes the corrosion phenomena associated with solar salts used in TES-PS10 pilot plant by installing corrosion racks in the salt tanks. Moreover, a postmortem study of different components was performed after facility shut down. Finally, in order to reduce the cost of the salt inventory in TES systems, the corrosivity of different low purity nitrates mixtures has been analyzed at laboratory scale. The second block of the Thesis focuses on latent heat storage systems. Specifically, it has been analyzed the corrosion associated with the proposed 46% LiOH-54% KOH peritectic mixture as a phase change material in the evaporation module of direct steam generation (DSG) CSP plants. Thus, corrosion tests have been performed at laboratory level to evaluate the corrosion performance of several materials in contact with such hydroxides.
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10

Maaza, Malik. "Latent and thermal energy storage enhancement of silver nanowires-nitrate molten salt for concentrated solar power." University of Western Cape, 2020. http://hdl.handle.net/11394/8038.

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>Magister Scientiae - MSc
Phase change material (PCM) through latent heat of molten salt, is a convincing way for thermal energy storage in CSP applications due to its high volume density. Molten salt, with (60% NaNO3 and 40% KNO3) has been used extensively for energy storage however; the low thermal conductivity and specific heat have limited its large implementation in solar applications. For that, molten salt with the additive of silver nanowires (AgNWs) was synthesized and characterized. This research project aims to investigate the thermophysical properties enhancement of nanosalt (Mixture of molten salt and silver nanowires). The results obtained showed that by simply adjusting the temperature, Silver nanowires with high aspect ratio have been synthesized through the enhanced PVP polyol process method. SEM results revealed a network of silver nanowires and TEM results confirmed the presence of silver nanowires with an average diameter of 129 nm and 16 μm in length.
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Книги з теми "Concentrated solar thermal energy"

1

Chandra, Laltu, and Ambesh Dixit, eds. Concentrated Solar Thermal Energy Technologies. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-4576-9.

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2

Norton, Brian. Solar energy thermal technology. London: Springer-Verlag, 1992.

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3

Norton, Brian. Solar Energy Thermal Technology. London: Springer London, 1992.

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4

Garg, H. P., S. C. Mullick, and A. K. Bhargava. Solar Thermal Energy Storage. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-5301-7.

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5

Becker, Manfred, and Karl-Heinz Funken, eds. Solar Thermal Energy Utilization. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-52340-3.

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6

Becker, Manfred, Karl-Heinz Funken, and Gernot Schneider, eds. Solar Thermal Energy Utilization. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-52342-7.

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7

Becker, Manfred, ed. Solar Thermal Energy Utilization. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-662-09933-9.

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8

Norton, Brian. Solar Energy Thermal Technology. London: Springer London, 1992. http://dx.doi.org/10.1007/978-1-4471-1742-1.

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9

Becker, Manfred, ed. Solar Thermal Energy Utilization. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-662-01626-8.

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10

Becker, Manfred, ed. Solar Thermal Energy Utilization. Berlin, Heidelberg: Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/978-3-662-01628-2.

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Частини книг з теми "Concentrated solar thermal energy"

1

Atchuta, S. R., B. Mallikarjun, and S. Sakthivel. "Optically Enhanced Solar Selective and Thermally Stable Absorber Coating for Concentrated Solar Thermal Application." In Advances in Energy Research, Vol. 2, 217–28. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2662-6_21.

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2

Maduabuchi, Chika, Ravita Lamba, Chigbogu Ozoegwu, Howard O. Njoku, Mkpamdi Eke, and Emenike C. Ejiogu. "Electro-thermal and Mechanical Optimization of a Concentrated Solar Thermoelectric Generator." In Springer Proceedings in Energy, 65–81. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92148-4_3.

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3

Lensch, G., P. Lippert, W. Rudolph, and A. Grychta. "Investigation and Selection of Materials Resistant to Temperatures and Radiation to Design and Construct a Ceramic/Metallic-Ceramic Secondary Concentrator." In Solar Thermal Energy Utilization, 221–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-52340-3_4.

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4

Lensch, G., P. Lippert, and W. Rudolph. "Investigation and Selection of Materials Resistant to Temperatures and Radiation to Construct a Metallic/Ceramic Secondary Concentrator as well as Measurements at Premodels." In Solar Thermal Energy Utilization, 1–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-52342-7_1.

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5

Soheila, Riahi, Evans Michael, Ming Liu, Rhys Jacob, and Frank Bruno. "Evolution of Melt Path in a Horizontal Shell and Tube Latent Heat Storage System for Concentrated Solar Power Plants." In Solid–Liquid Thermal Energy Storage, 257–73. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003213260-12.

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6

Babu, S., R. Sriram, S. Gopikrishnan, and A. Praveen. "Solar Energy Simulation of Fresnel Lens Concentrated System for Thermal Electric Generator." In Lecture Notes in Mechanical Engineering, 833–39. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0698-4_91.

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7

Ahmed, Sara Iyad, Yusuf Bicer, and Hicham Hamoudi. "Design and Thermodynamic Analysis of a Concentrated Solar–Thermal-Based Multigeneration System for a Sustainable Laundry Facility." In Green Energy and Technology, 117–37. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8278-0_9.

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8

Goetzberger, A., W. Bronner, and W. Wettling. "Efficiency of a Combined Solar Concentrator Cell and Thermal Power Engine System." In Tenth E.C. Photovoltaic Solar Energy Conference, 11–14. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3622-8_3.

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9

Schöffel, U., and R. Sizmann. "Terminal Concentrator Assisted Solar Furnace Layout and Construction." In Solar Thermal Energy Utilization. German Studies on Technology and Application, 1–17. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84799-8_1.

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10

Burhan, Muhammad, Muhammad Wakil Shahzad, and Kim Choon Ng. "Compact CPV—Sustainable Approach for Efficient Solar Energy Capture with Hybrid Concentrated Photovoltaic Thermal (CPVT) System and Hydrogen Production." In Springer Proceedings in Energy, 93–102. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00105-6_6.

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Тези доповідей конференцій з теми "Concentrated solar thermal energy"

1

Stoynov, L. A., and Prasad K. D. V. Yarlagadda. "Development and Modification of a Cassegrainian Solar Concentrator for Utilization of Solar Thermal Power." In ASME 2003 International Solar Energy Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/isec2003-44071.

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Almost all life on Earth has been using solar energy in many ways, but when high temperatures are desired, concentration of the incident solar radiation (insolation) becomes necessary. The present work is an attempt to improve and experimentally compare alternative beam delivering and focusing energy systems of a small solar concentrator. The researched solar energy concentrator (SEC) facility consists of modified two mirror Cassegrainian solar concentrator, two-speed sun-tracking manual and automatic control, concentrated insolation transmitting and continuous beam focusing systems. A number of system modifications during the development of the two stage, point focusing type solar concentrator arrangement for solar thermal power utilization have also been explored and are reported in this paper. Some of the experimental testing results obtained using single polymer fiber 14 mm in diameter, a truncated conical concentrator, and auxiliary lens system alternatives, have been compared. In addition, some details about various improvements of the sun-tracking sensor and automatics, beam transmission and continuous focusing capabilities of the SEC facility have been described.
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2

Wagner, Sharon J., and Edward S. Rubin. "Economic Implications of Thermal Energy Storage for Concentrated Solar Thermal Power." In World Renewable Energy Congress – Sweden, 8–13 May, 2011, Linköping, Sweden. Linköping University Electronic Press, 2011. http://dx.doi.org/10.3384/ecp110573821.

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3

Fonseca do Canto, Luma, and José Roberto Simões Moreira. "Thermal modeling of cavity-receiver for concentrated solar energy." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-0861.

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4

Taylor, Robert A., Patrick E. Phelan, Todd P. Otanicar, Himanshu Tyagi, and Steven Trimble. "Applicability of Nanofluids in Concentrated Solar Energy Harvesting." In ASME 2010 4th International Conference on Energy Sustainability. ASMEDC, 2010. http://dx.doi.org/10.1115/es2010-90055.

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Concentrated solar energy is becoming the input for an increasing number of thermal systems [1]. Recent papers have indicated that the addition of nanoparticles to conventional working fluids (i.e. nanofluids) can improve heat transfer and solar collection [2–4]. Thermal models developed herein show that nanofluid collectors can be more efficient than conventional concentrating solar thermal technology. This work indicates that power tower schemes are the best application for taking advantage of potential nanofluid efficiency improvements. This study provides a notional design of how such a nanofluid power tower receiver might be built. Using this type of design, we show a theoretical enhancement in efficiency of up to a 10% by using nanofluids. Further, we compare the energy and revenue generated in a conventional solar thermal plant to a nanofluid one. It was found that a 100MWe capacity solar thermal power tower operating in a solar resource similar to Tucson, AZ could generate ∼$3.5 million more per year by incorporating a nanofluid receiver.
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5

Mayette, Jessica B., Roger L. Davenport, and Russell E. Forristall. "The Salt River Project SunDish Dish-Stirling System." In ASME 2001 Solar Engineering: International Solar Energy Conference (FORUM 2001: Solar Energy — The Power to Choose). American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/sed2001-111.

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Abstract The SunDish is a solar thermal power system designed to produce utility-grade electricity from concentrated sunlight. The system is based on a reflective solar dish concentrator that concentrates solar energy to a Stirling engine/generator, producing a net output of up to 22kW at 1000 W/sq. m. of insolation (Stine and Diver, 1994). Salt River Project (SRP), Science Applications International Corporation (SAIC), STM Corporation, and the U.S. Department of Energy have cooperated to install and operate a prototype SunDish at the Salt River Pima-Maricopa Indian Community Landfill (SRP-MICL) in Tempe, Arizona. Operational results and experiences are discussed. At the site, methane gas is collected from the landfill and used as fuel in the SunDish to generate electricity when sunlight is not available due to clouds, and at night. Gas operation has presented some challenges, and operational experiences and incidents are discussed. Finally, design changes and system improvements that have resulted from operation of the prototype SunDish are discussed.
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6

Reyes-Belmonte, Miguel A., Elena Díaz, Manuel Romero, and José González-Aguilar. "Particles-based thermal energy storage systems for concentrated solar power." In SolarPACES 2017: International Conference on Concentrating Solar Power and Chemical Energy Systems. Author(s), 2018. http://dx.doi.org/10.1063/1.5067215.

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7

Riahi, Afifa, Abdessalem Ben Haj Ali, Amenallah Guizani, and Moncef Balghouthi. "Performance study of a concentrated photovoltaic thermal hybrid solar system." In 2019 10th International Renewable Energy Congress (IREC). IEEE, 2019. http://dx.doi.org/10.1109/irec.2019.8754650.

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8

Kaneko, Hiroshi, Hideyuki Ishihara, Takao Miura, Hiromitsu Nakajima, Noriko Hasegawa, and Yutaka Tamaura. "H2 Generation by Two-Step Water Splitting With CeO2-MOx Using Concentrated Solar Thermal Energy." In ASME 2006 International Solar Energy Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/isec2006-99065.

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CeO2-MOx (M = Mn, Fe, Ni, Cu) reactive ceramics, having high melting points and high conductivities of O2−, were synthesized with the combustion method from their nitrates for solar hydrogen production. The prepared CeO2-MOx samples were solid solutions between CeO2 and MOx with the fluorite structure through XRD. Two-step water splitting reactions with CeO2-MOx reactive ceramics proceeded at 1573–1773K for the O2 releasing step and at 1273K for the H2 generation step by irradiation of infrared imaging furnace as a solar simulator. The amounts of O2 evolved in the O2 releasing reaction with CeO2-MOx and CeO2 systems increased with the increase of the reaction temperature. The amounts of H2 evolved in the H2 generation reaction with CeO2-MOx systems except for M = Cu were more than that of CeO2 system after the O2 releasing reaction at the temperatures of 1673 and 1773K. The largest amount of H2 was generated with CeO2-NiO after the O2 releasing reaction at 1573, 1673 and 1773K. The O2 releasing reaction at 1673K and H2 generation reaction at 1273K with CeO2-Fe2O3 were repeated four times with the evolving of O2 (1.3cm3/g-sample) and H2 (2.3cm3/g-sample) gases, respectively. The possibility of solar hydrogen production with CeO2-MOx (M = Mn, Fe, Ni) reactive ceramics system by using concentrated solar thermal energy was suggested.
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9

Thayer, John, Ross Galbraith, John Rosenfeld, and Chris Dyson. "Thermal Energy Storage for a Dish Stirling Concentrated Solar Power System." In 11th International Energy Conversion Engineering Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2013. http://dx.doi.org/10.2514/6.2013-3869.

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10

Guerreiro, Luis, and Manuel Collares-Pereira. "New materials for thermal energy storage in concentrated solar power plants." In SOLARPACES 2015: International Conference on Concentrating Solar Power and Chemical Energy Systems. Author(s), 2016. http://dx.doi.org/10.1063/1.4949116.

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Звіти організацій з теми "Concentrated solar thermal energy"

1

Kumar, Vinod. Computational Analysis of Nanoparticles-Molten Salt Thermal Energy Storage for Concentrated Solar Power Systems. Office of Scientific and Technical Information (OSTI), May 2017. http://dx.doi.org/10.2172/1355304.

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2

Yu, Wenhua, and Dileep Singh. Prototype Testing of Encapsulated Phase Change Material Thermal Energy Storage (EPCM-TES) for Concentrated Solar Power. Office of Scientific and Technical Information (OSTI), May 2019. http://dx.doi.org/10.2172/1512771.

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3

Ehrhart, Brian, and David Gill. Evaluation of annual efficiencies of high temperature central receiver concentrated solar power plants with thermal energy storage. Office of Scientific and Technical Information (OSTI), July 2013. http://dx.doi.org/10.2172/1090218.

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4

Nene, Anita A., Solaisamy Ramachandran, and Sivalingam Suyambazhahan. Design and Analysis of Solar Thermal Energy Storage System for Scheffler Solar Concentrator. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, October 2019. http://dx.doi.org/10.7546/crabs.2019.10.03.

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5

Muralidharan, Govindarajan, Shivakant Shukla, Roger Miller, Donovan Leonard, Jim Myers, and Paul Enders. Cast Components for High Temperature Concentrated Solar Power Thermal Systems. Office of Scientific and Technical Information (OSTI), September 2022. http://dx.doi.org/10.2172/1890293.

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6

Yellowhair, Julius E., Hoyeong Kwon, Andrea Alu, Robert L. Jarecki, and Subhash L. Shinde. Metamaterial Receivers for High Efficiency Concentrated Solar Energy Conversion. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1431481.

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7

Glatzmaier, G., D. Blake, and S. Showalter. Assessment of methods for hydrogen production using concentrated solar energy. Office of Scientific and Technical Information (OSTI), January 1998. http://dx.doi.org/10.2172/564039.

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8

Renk, K., Y. Jacques, C. Felts, and A. Chovit. Holographic Solar Energy Concentrators for Solar Thermal Rocket Engines. Fort Belvoir, VA: Defense Technical Information Center, May 1988. http://dx.doi.org/10.21236/ada198807.

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9

Tschoppa, Daniel, Zhiyong Tianb, Magdalena Berberichc, Jianhua Fand, Bengt Perersd, and Simon Furbo. LSEVIER paper: Large Scale Solar Thermal Systems in Leading Countries. IEA SHC Task 55, January 2020. http://dx.doi.org/10.18777/ieashc-task55-2020-0001.

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Анотація:
Large-scale solar thermal systems are a cost-efficient technology to provide renewable heat. The rapid market growth in the last decade has been concentrated on a small number of countries, with the outstanding position of Denmark followed by China, Germany and Austria. This paper provides a comprehensive overview of the market and common technological solutions for large-scale solar thermal systems in these countries.
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Cheung, Margaret Shun. Multiscale Investigation of Thermal Fluctuations on Solar-Energy Conversion. Office of Scientific and Technical Information (OSTI), September 2014. http://dx.doi.org/10.2172/1360784.

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