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Dissertations / Theses on the topic 'Concentrated Solar Thermal (CST)'

Author: Grafiati

Published: 11 December 2022

Last updated: 19 July 2025

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1

Anglani, Francesco. "Computer modelling and experimental testing of spray cleaning methodologies for concentrated solar thermal (CST) mirror cleaning." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116180/1/Francesco_Anglani_Thesis.pdf.

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This project was a step forward in establishing an effective high-pressurised cleaning procedure to investigate soil detachment from CSP reflectors through fluid dynamic simulations evaluated the overall force generated by the jet on dust particles. Outcomes reveal an increase of cleaning efficiency of high-pressure spray jets when the standoff distance is in the range X = 6D-15D with the angle of impingement set to =75° and inlet pressure in the range Pin = 50-70 bar.

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Pragada, Gandhi, and Nitish Perisetla. "Utility-Scale Solar Power Plants with Storage : Cost Comparison and Growth Forecast Analysis." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-301838.

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Renewable energy for energy production, like Solar, is turning out to be very pertinent in today's world [1]. It is very clear that Solar Energy is going to emerge as one of the key sources of energy in future. Moreover, the storage option is going to play an essential role to the future deployment of solar power plants. Concentrated solar power plants with thermal storage, photovoltaic plants integrated with battery energy storage, and hybrid plants are attractive solutions to obtain a stable and dispatchable energy production. Investors or policymakers usually find it challenging to come up

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3

Abeywardana, Asela Janaka. "Solar - Biomass hybrid system for process heat supply in medium scale hotels in Sri Lanka." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-23794.

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This study aimed at evaluating and demonstrating the feasibility of using Concentrated Solar Thermal technology combined with biomass energy technology as a hybrid renewable energy system to supply the process heat requirements in small scale industries in Sri Lanka. Particularly, the focus was to apply the concept to the expanding hotel industry, for covering the thermal energy demand of a medium scale hotel. Solar modules utilize the rooftop area of the building to a valuable application. Linear Fresnel type of solar concentrator is selected considering the requirement of the application and

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Berryman, Ian. "Optimisation, design, development, and trial of a low-cost solar oven with novel concentrator geometry." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:42de9b33-18e1-4f22-8a44-3ddfd532bd0b.

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A promising and novel solar concentrator design has been thoroughly investigated and optimised. A prototype concentrator based on this novel geometry was validated using ray tracing techniques. This ray tracing demonstrated the comparative performance of this novel concentrator in regards to equivalent parabolic dishes. The effect of mirror surface normal errors on performance was established using Monte-Carlo based ray tracing code, which agreed well with the optical performance of this prototype which was determined experimentally. A need for low-cost solar cookers to replace bio-mass worldw

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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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6

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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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 renewabl

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7

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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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, d

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8

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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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 be

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9

Noone, Corey J. (Corey James). "Optimization of central receiver concentrated solar thermal : site selection, heliostat layout & canting." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/69782.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 65-67).<br>In this thesis, two new models are introduced for the purposes of (i) locating sites in hillside terrain suitable for central receiver solar thermal plants and (ii) optimization of heliostat field layouts for any terrain. Additionally, optimization of heliostat canting, is presented as an application of the heliostat layout optimization model. Using the site selection model, suitable sites are located based o

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10

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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11

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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Mechanical Engineering<br>Ph.D.<br>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 ove

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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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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

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13

Desai, Ranjit. "Thermo-Economic Analysis of a Solar Thermal Power Plant with a Central Tower Receiver for Direct Steam Generation." Thesis, KTH, Kraft- och värmeteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-131764.

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Zhang, Yi Zhong. "Experimental investigations on a two-axis sun-tracking concentrated photovoltaic-thermal system cooled by phase change material." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3950058.

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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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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 co

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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

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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<br>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 (Mix

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Canavarro, Diogo. "Advances in the design of solar concentrators for thermal applications." Doctoral thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/14557.

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This thesis presents advances in the design of solar concentrators. Based on the study of the Compact Linear Fresnel Re ector Concentrator "Etendue-Matched" (CLFREM), this thesis developed optical solutions based on the Simultaneous Multiple Surface method (SMS) and new approaches of analysis of the characterizing parameters of a solar concentrator. This thesis is organized into ve sections. In the rst section (Chapters 1 and 2) an introduction to the topics addressed in this work is presented together with a revision of the underlying basic optics. In the second section (Chapters 3, 4, and

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Nyberg, Fanny. "Evaluation of Convection Suppressor for Concentrating Solar Collectors with a Parabolic Trough." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-148543.

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Absolicon Solar Collector AB in Härnösand, Sweden, develops concentrating solar collectors with a parabolic trough. In the solar collector trough, there is thermal loss due to convection. A convection suppressor was made and used as a method to reduce thermal loss due to convection in the trough. The objective of the project was to evaluate the convection suppressor for solar collectors with a parabolic trough and its impact on the performance (thermal loss characteristics) in two different orientations of the trough, horizontal and inclined. The performance of the solar collector was first me

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20

Ferruzza, Davide. "Thermocline storage for concentrated solar power : Techno-economic performance evaluation of a multi-layered single tank storage for Solar Tower Power Plant." Thesis, KTH, Kraft- och värmeteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172456.

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Solar Tower Power Plants with thermal energy storage are a promising technology for dispatchable renewable energy in the near future. Storage integration makes possible to shift the electricity production to more profitable peak hours. Usually two tanks are used to store cold and hot fluids, but this means both higher related investment costs and difficulties during the operation of the variable volume tanks. Another solution can be a single tank thermocline storage in a multi-layered configuration. In such tank both latent and sensible fillers are employed to decrease the related cost by up t

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21

Ehtiwesh, Ismael Alagili Sassi. "Exergetic, energetic, economic and environmental evaluation of concentrated solar power plants in Libya." Doctoral thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/15882.

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Doutoramento em Engenharia Mecânica<br>The PhD project addresses the potential of using concentrating solar power (CSP) plants as a viable alternative energy producing system in Libya. Exergetic, energetic, economic and environmental analyses are carried out for a particular type of CSP plants. The study, although it aims a particular type of CSP plant – 50 MW parabolic trough-CSP plant, it is sufficiently general to be applied to other configurations. The novelty of the study, in addition to modeling and analyzing the selected configuration, lies in the use of a state-of-the-art exerge

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Prinsloo, Gerhardus Johannes. "Automatic positioner and control system for a motorized parabolic solar reflector." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96137.

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Thesis (MEng)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Most rural African villages enjoy high levels of sunlight, but rolling out solar power generation technology to tap into this renewable energy resource at remote rural sites in Africa pose a number of design challenges. To meet these challenges, a project has been initiated to design, build and test/evaluate a knock down 3 kW peak electrical stand-alone self-tracking dual-axis concentrating solar power system. This study focusses on the mechatronic engineering aspects in the design and development of a dynamic mechatroni

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Tiari, Saeed. "EXPERIMENTAL AND NUMERICAL STUDY OF LATENT HEAT THERMAL ENERGY STORAGE SYSTEMS ASSISTED BY HEAT PIPES FOR CONCENTRATED SOLAR POWER APPLICATION." Diss., Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/403481.

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Mechanical Engineering<br>Ph.D.<br>A desirable feature of concentrated solar power (CSP) with integrated thermal energy storage (TES) unit is to provide electricity in a dispatchable manner during cloud transient and non-daylight hours. Latent heat thermal energy storage (LHTES) offers many advantages such as higher energy storage density, wider range of operating temperature and nearly isothermal heat transfer relative to sensible heat thermal energy storage (SHTES), which is the current standard for trough and tower CSP systems. Despite the advantages mentioned above, LHTES systems performan

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Hallberg, Maria, and Elin Hallme. "Introducing a central receiver system for industrial high-temperature process heat applications : A techno-economic case study of a large-scale CST plant system in a South African manganese sinter plant." Thesis, KTH, Kraft- och värmeteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-249067.

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The objective of this thesis was to investigate the potential for introducing a concentrating solar thermal (CST) central receiver plant system based on flexible heliostats - HelioPods - to provide high-temperature process heat in industrial applications. A CST plant system was designed in MATLAB, optically simulated for three design days in the ray-tracing software Tonatiuh and further analyzed in MATLAB by interpolating the results for each hour of the year. A case study was made on introducing a CST plant system based on HelioPods in a South African manganese sinter plant. The study include

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Gunawan, Gan Philipe. "Concentrated Solar Thermal Plant for Future Fuels Production : Process Modeling and Techno-economic Analysis of Syngasoline, Syndiesel, Ethanol and Methanol Production Using Thermochemical Cycle based on Metal Oxide." Thesis, KTH, Kraft- och värmeteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235512.

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Concentrated Solar Thermal technology (CST) is a very promising renewable energy technology and has a broad range of use. Conventionally, CST systems are mostly used for power generation according to the Rankine cycle and thus often referred to as Concentrated Solar Power (CSP). In this present study, the solar heat is utilized to drive a thermochemical redox cycle of a metal-oxide in order to produce synthetic gas, a combination of hydrogen and carbon monoxide. Later, the synthetic gas is converted into usable liquid fuel whereas the production pathway is CO2 free. This thesis focuses on the

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Ertl, Felix. "Exergoeconomic Analysis and Benchmark of a Solar Power Tower with Open Air Receiver Technology." Thesis, KTH, Kraft- och värmeteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101320.

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Sandlin, Matthew. "An experimental and numerical study of granular hopper flows." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50318.

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In a proposed design for a concentrated solar power tower, sand is irradiated by solar energy and transfers its energy to another fluid stream by means of a finned tube heat exchanger. To maximize heat transfer and minimize potential damage to the heat exchanger, it is desired to have a very uniform flow through the heat exchanger. However, performing full scale flow tests can be expensive, impractical, and depending upon the specific quantities of interest, unsuitable for revealing the details of what it happening inside of the flow stream. Thus, the discrete element method has been used to s

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Narayan, Aditya. "Investigations on Air-cooled Air Gap Membrane Distillation and Radial Waveguides for Desalination." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78779.

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This thesis presents investigations on air-cooled air gap membrane distillation for desalination and the application of radial waveguides based on total internal reflection for solar thermal desalination. Using an air-cooled design for an air gap membrane distillation (AGMD) process may result in significantly lower energy requirements for desalination. Experiments were conducted on AGMD module to study the effect of air gap, support mesh conductivity and hydrophobicity, condensing surface hydrophobicity. A novel modular design was used in which modules could be used in a series configuration

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Boissière, Benjamin. "Étude hydrodynamique et thermique d'un nouveau concept de récepteur solaire à suspensions denses gazparticules." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/13944/1/boissiere.pdf.

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Parmi les centrales solaires thermiques à concentration, la technologie des centrales à tour offre l'un des rendements les plus importants de production d'énergie. Néanmoins, l'efficacité et la sécurité de ces centrales sont améliorables. En effet, les sels fondus, généralement utilisés comme fluide de transfert thermique, présentent une plage limitée d'utilisation (200-550°C), à l'origine des limites d'efficacité de la conversion thermique-électrique, ainsi que de consommations parasites d'énergie de chauffage. De plus, leurs caractères corrosif et comburant sont à l'origine de sévères contra

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Leray, Cedric. "Etude du comportement thermique et thermomécanique des récepteurs solaires sous haut flux radiatif." Thesis, Perpignan, 2017. http://www.theses.fr/2017PERP0003/document.

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Dans le contexte énergétique qui se profile, la production d’électricité par voie solaire thermodynamique s’avère une solution prometteuse, que ce soit pour des considérations économiques, d’échelle de production ou environnementales. Une voie d’amélioration du rendement des centrales solaires à tour consiste à utiliser des cycles thermodynamiques à haut rendement type cycles combinés. Cela nécessite de pouvoir fournir un fluide de travail pressurisé à très haute température (10bar et 1000°C minimum). Ce manuscrit présente les travaux menés afin de développer et de viabiliser un concept d’abso

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Graziani, Alessandro. "Methods and tools for the optimization of renewable technologies and hybrid energy systems. Metodi e strumenti per l'ottimizzazione di tecnologie rinnovabili e sistemi energetici ibridi." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3423884.

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The United Nations (UN) project "Sustainable energy for all" sets three ambitious objectives to favor a sustainable development and to limit climate change: - Universal access to modern energy services. Electricity is currently not available for 1.3 billion people and the global energy demand is expected to grow of about 35% within 2040, due to the increasing world population and the expanding economies - Double the global rate of improvement in energy efficiency - Double the share of renewable energy sources (RESs) in the global energy mix In addition, according to the climate scenario as

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Huang, Chen-bin, and 黃宸斌. "Characteristic Analysis of a Solar-Concentrated Ocean Thermal Energy Conversion System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/58505484952586112664.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>97<br>This thesis presents stability analysis, steady-state results, and dynamic performance of ocean thermal energy conversion (OTEC) system and solar-concentrated OTEC system under two configurations, i.e., OTEC system directly connecting to a utility grid through a transmission line and a solar-concentrated OTEC system connecting to a utility grid through a transmission line and connecting to a local load. The q-d axis equivalent-circuit model is employed to establish the models for solar-concentrated device, heat exchanger, governor, turbine, and synchronous g

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Shin, Donghyun. "Molten Salt Nanomaterials for Thermal Energy Storage and Concentrated Solar Power Applications." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-10187.

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The thermal efficiency of concentrated solar power (CSP) system depends on the maximum operating temperature of the system which is determined by the operating temperature of the TES device. Organic materials (such as synthetic oil, fatty acid, or paraffin wax) are typically used for TES. This limits the operating temperature of CSP units to below 400 degrees C. Increasing the operating temperature to 560 degrees C (i.e., the creeping temperature of stainless steel), can enhance the theoretical thermal efficiency from 54 percent to 63 percent. However, very few thermal storage materials are co

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Asselineau, Charles-Alexis. "Geometrical Optimisation of Receivers for Concentrating Solar Thermal Systems." Phd thesis, 2018. http://hdl.handle.net/1885/143561.

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In concentrated solar thermal technologies, the receiver converts concentrated solar radiation into high-temperature heat. Solar receivers are commonly simulated with a stochastic integration method: Monte-Carlo ray-tracing. The optimisation of the geometry of receivers is challenging when using existing optimisation methods for two reasons: each receiver evaluation using Monte-Carlo ray-tracing requires significant computational effort and the outcome of a simulation involves uncertainty. A series of novel optimisation techniques are proposed to enable

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Jung, Seunghwan. "Numerical and Experimental Investigation of Inorganic Nanomaterials for Thermal Energy Storage (TES) and Concentrated Solar Power (CSP) Applications." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10739.

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The objective of this study is to synthesize nanomaterials by mixing molten salt (alkali nitrate salt eutectics) with inorganic nanoparticles. The thermo-physical properties of the synthesized nanomaterials were characterized experimentally. Experimental results allude to the existence of a distinct compressed phase even for the solid phase (i.e., in the nanocomposite samples). For example, the specific heat capacity of the nanocomposites was observed to be enhanced after melting and re-solidification - immediately after their synthesis; than those of the nanocomposites that were not subjecte

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Lungwitz, F., R. Escobar-Galindo, D. Janke, et al. "Transparent Conductive Tantalum Doped Tin Oxide as Selectively Solar-Transmitting Coating for High Temperature Solar Thermal Applications." 2019. https://hzdr.qucosa.de/id/qucosa%3A33925.

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The transparent conductive oxide (TCO) SnO2:Ta is developed as a selectively solar-transmitting coating for concentrated solar power (CSP) absorbers. Upon covering with an antireflective layer, a calculated absorptivity of 95% and an emissivity of 30% are achieved for the model configuration of SnO2:Ta on top of a perfect black body (BB). High-temperature stability of the developed TCO up to 1073 K is shown in situ by spectroscopic ellipsometry and Rutherford backscattering spectrometry. The universality of the concept is demonstrated by transforming silicon and glassy carbon from non-selectiv

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Bannur, Suhas. "Design and Development of a Novel Solar Thermal Receiver." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/4291.

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One of the most widely used solar collectors for process heating and large scale electricity generation is the parabolic trough collector (PTC), in which a tube placed at the focus of the parabola receives concentrated solar radiation. In this work, a novel solar receiver design is proposed that bridges the gap in efficiency between the evacuated and non-evacuated receivers which are presently in use. In the standard or commercial non-evacuated receivers, the absorbing surface loses the heat to the surrounding ambient and to the heat transfer fluid (useful heat). A novel receiver has been pro

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Escobar-Galindo, R., E. Guillén, I. Heras, et al. "Design of high-temperature solar-selective coatings based on aluminium titanium oxynitrides AlyTi1-y(OxN1-x). Part 2: Experimental validation and durability tests at high temperature." 2019. https://hzdr.qucosa.de/id/qucosa%3A33920.

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The durability of two solar-selective aluminium titanium oxynitride multilayer coatings was studied under conditions simulating realistic operation of central receiver power plants. The coatings were deposited by cathodic vacuum arc applying an optimized design concept for complete solar-selective coating (SSC) stacks. Compositional, structural and optical characterization of initial and final stacks was performed by scanning electron microscopy, elastic recoil detection, UV-Vis-NIR-IR spectrophotometry and X-Ray diffraction. The design concept of the solar selective coatings was validated by

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Jafari, Azadeh. "Effects of Turbulence on Heliostat Wind Loads." Thesis, 2020. https://hdl.handle.net/2440/135328.

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Concentrated solar thermal systems are being increasingly deployed for industrial process heating and large-scale electricity production. A major constituent of a concentrating solar plant is the field of heliostat mirrors, which reflect the sunlight onto a receiver. Heliostats are subjected to fluctuating wind loads arising from atmospheric wind. These forces are important for design of heliostats, which must survive maximum wind loads under extreme conditions. Furthermore, dynamic wind loads which lead to vibrations of the mirror panel can affect the tracking accuracy of a heliostat field. T

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Dunn, Rebecca. "Receiver Geometries for Solar Dish Concentrators." Phd thesis, 2016. http://hdl.handle.net/1885/133858.

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This thesis studies receiver/reactor geometry for the ammonia thermochemical storage system and dish concentrators, using the case study of a masked 9 m2 dish. Experimental results proved that altering the geometric arrangement – in this case the cone angle – of reactor tubes within a cavity receiver significantly affects the heat transfers within and heat losses from the receiver. By consequence both the receiver efficiency and the solar-to-chemical efficiency of the dish-receiver system can be significantly increased. This is note-worthy as improvement

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Kaniyal, Ashok Athreya. "Lowering the barriers to developing thermal renewable energy technologies." Thesis, 2016. http://hdl.handle.net/2440/116807.

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Impediments to investment in renewable energy resources arise in five areas, namely, infrastructure access, technological and resource uncertainty, competition from established fossil fuel alternatives, asset financing and public policy. Together these can lead to large capital cost penalties and poor resource productivity that reduce the viability of projects. Presented here are system-wide analyses of two novel pathways to generate new investment in concentrated solar thermal and in geothermal energy resources. The pathways are designed to reduce the minimum capital outlay required for the d

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Khivsara, Sagar D. "A Design Concept of a Volumetric Solar Receiver for Supercritical CO2 Brayton Cycle." Thesis, 2014. http://etd.iisc.ac.in/handle/2005/2996.

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Recently, the supercritical carbon dioxide (s-CO2) Brayton cycle has been identified as a promising candidate for solar-thermal energy conversion due to its potentially high thermal efficiency (50%, for turbine inlet temperatures of ~ 1000 K). Realization of such a system requires development of solar receivers which can raise the temperature of s-CO2 by over 200 K, to a receiver outlet temperature of 1000 K. Volumetric receivers are an attractive alternative to tubular receivers due to their geometry, functionality and reduced thermal losses. A concept of a ceramic pressurized volumetric rece

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43

Khivsara, Sagar D. "A Design Concept of a Volumetric Solar Receiver for Supercritical CO2 Brayton Cycle." Thesis, 2014. http://hdl.handle.net/2005/2996.

Full text

Abstract:

Recently, the supercritical carbon dioxide (s-CO2) Brayton cycle has been identified as a promising candidate for solar-thermal energy conversion due to its potentially high thermal efficiency (50%, for turbine inlet temperatures of ~ 1000 K). Realization of such a system requires development of solar receivers which can raise the temperature of s-CO2 by over 200 K, to a receiver outlet temperature of 1000 K. Volumetric receivers are an attractive alternative to tubular receivers due to their geometry, functionality and reduced thermal losses. A concept of a ceramic pressurized volumetric rece

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