Relevant bibliographies by topics / Linear Fresnel

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Linear Fresnel'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Linear Fresnel"

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Anand, Vijayakumar, Tomas Katkus, Soon Hock Ng, and Saulius Juodkazis. "Review of Fresnel incoherent correlation holography with linear and non-linear correlations [Invited]." Chinese Optics Letters 19, no. 2 (2021): 020501. http://dx.doi.org/10.3788/col202119.020501.

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Abbas, R., J. Muñoz-Antón, M. Valdés, and J. M. Martínez-Val. "High concentration linear Fresnel reflectors." Energy Conversion and Management 72 (August 2013): 60–68. http://dx.doi.org/10.1016/j.enconman.2013.01.039.

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Yang, Yong Ping, Yong Sheng Hu, Qin Yan, and Gang Yang. "Thermal Character and Generating Capacity Analysis of Solar Linear Fresnel Thermal Power Plant." Advanced Materials Research 805-806 (September 2013): 17–20. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.17.

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Solar Linear Fresnel thermal power plant is typical linear focus solar thermal system. It has the advantage of simple structure, lower investment cost and so on. At present, Solar Linear Fresnel is developing and popularizing all over the word. Some of them are already in commercial operation. According to the typical climate data, the thermal character and generating capacity of Linear Fresnel systems are analyzed, including thermal receiving efficiency, power generating efficiency and thermal losses regularity. The research results can be used to support Solar Linear Fresnel system operation and design optimization.
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Hamam, H. "Simplified linear formulation of Fresnel diffraction." Optics Communications 144, no. 1-3 (December 1997): 89–98. http://dx.doi.org/10.1016/s0030-4018(97)00394-5.

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Sánchez-González, Alberto, and Jesús Gómez-Hernández. "Beam-down linear Fresnel reflector: BDLFR." Renewable Energy 146 (February 2020): 802–15. http://dx.doi.org/10.1016/j.renene.2019.07.017.

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Du Chunxu, 杜春旭, 王普 Wang Pu, 吴玉庭 Wu Yuting, and 马重芳 Ma Chongfang. "Concentration Ratio Analysis of Linear Fresnel Reflector." Acta Optica Sinica 31, no. 8 (2011): 0808001. http://dx.doi.org/10.3788/aos201131.0808001.

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Ford, Graham. "CSP: bright future for linear fresnel technology?" Renewable Energy Focus 9, no. 5 (September 2008): 48–51. http://dx.doi.org/10.1016/s1755-0084(08)70029-2.

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Nixon, J. D., and P. A. Davies. "Cost-exergy optimisation of linear Fresnel reflectors." Solar Energy 86, no. 1 (January 2012): 147–56. http://dx.doi.org/10.1016/j.solener.2011.09.024.

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Mills, David R., and Graham L. Morrison. "Compact Linear Fresnel Reflector solar thermal powerplants." Solar Energy 68, no. 3 (March 2000): 263–83. http://dx.doi.org/10.1016/s0038-092x(99)00068-7.

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Sen, P. K., K. Ashutosh, K. Bhuwanesh, Z. Engineer, S. Hegde, P. V. Sen, and P. Davies. "Linear Fresnel Mirror Solar Concentrator with Tracking." Procedia Engineering 56 (2013): 613–18. http://dx.doi.org/10.1016/j.proeng.2013.03.167.

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Dissertations / Theses on the topic "Linear Fresnel"

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Pye, John Downing Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "System modelling of the compact linear Fresnel reflector." Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2008. http://handle.unsw.edu.au/1959.4/41244.

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The Compact Linear Fresnel Reflector is a solar thermal energy system currently at prototype stage in Australia. The system uses parallel rows of mirrors lined up underneath a long, elevated thermal absorber. The mirrors move so as to focus solar radiation onto the absorber; the absorber contains a bank of high-pressure water pipes through which water is pumped and gradually boils. The process of ??direct steam generation?? in very long pipes, up to 300 m in a straight run, has not previously been performed at this scale; other systems use shorter pipe runs, or use other fluids such as non-boiling oil. This thesis addresses a broad range of design issues relating to the CLFR prototype and its components. Beam solar radiation at the prototype site is estimated from available data including satellite-derived and ground-based measurements. Existing correlations for the beam component of global radiation do not apply well to Australian conditions so a new correlation is proposed. Computational fluid dynamics simulations establish radiative heat-loss as the dominant mode for the thermal absorber. Results are gathered for a range of sizes and shapes, and heat-loss correlations are derived for use in subsequent simulation. Two-phase flow in the absorber direct-steam-generation process is examined, and a detailed model including, pipe-friction pressure drops, flow-boiling heat transfer and cavity heat loss is presented, with validation against the experimental results of other workers. A series of ??performance maps?? give the predicted outlet flow regime for varied inlet conditions, allowing selection of desired operating points. A full system model is given that integrates this absorber model with ancillary components including the pump and connecting pipework; the model is used to evaluate pumping requirements and to establish expected operating conditions. The inherent pressure instability arising from the two phase flow is examined and orifice plates are sizes to stabilise this effect. A dynamic model for the absorber pipe flow using fully implicit finite difference techniques and accurate IAPWS-IF97 steam properties gives the predicted behaviour during solar transients at both long and short time-scales.
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Walker, Gregg Stuart. "Development of a low cost linear fresnel solar concentrator." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85762.

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Thesis (MScEng)--Stellenbosch University, 2013.
ENGLISH ABSTRACT: This study describes the design and construction of a low-cost linear Fresnel solar concentrator. Ray-trace simulation models that analyse optical performance were developed and then used to perform sensitivity analyses of various characteristics of linear Fresnel concentrators. The design of a small-scale concentrator was optimised using the simulation models, after which the concentrator was constructed in the solar laboratory. The concentrator consists of a single-motor tracking system, flat primary mirrors and a low-cost secondary concentrator that approximates a compound parabolic concentrator. Testing revealed satisfactory performance that was comparable to the simulation models’ prediction. The construction of a low-cost solar concentrator that can replace existing thermal sources for the generation of power and process heat is thus achievable.
AFRIKAANSE OPSOMMING: Die ontwerp en konstruksie van 'n laekoste- lineêre Fresnel-sonkonsentreerder word in hierdie studie beskryf. Stralingsimulasiemodelle wat optiese werksverrigting analiseer is ontwikkel en gebruik om sensitiwiteitsanalises van die verskillende eienskappe van lineêre Fresnel-konsentreerders te doen. Die modelle is verder gebruik om die ontwerp van 'n kleinskaalse konsentreerder te optimeer, waarna die konsentreerder in die sonlaboratorium gebou is. Die konsentreerder bestaan uit 'n enkelmotorvolgingstelsel, plat primêre spieëls en 'n laekoste- sekondêre konsentreerder soortgelyk aan 'n saamgestelde, paraboliese konsentreerder. Toetsing dui bevredigende werksverrigting aan, vergelykbaar met wat die simulasiemodelle voorspel het. Dit is dus moontlik om 'n laekoste-sonkonsentreerder wat bestaande termiese bronne vir kragopwekking en proseshittegenerasie kan vervang, daar te stel.
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Moghimi, Ardekani Mohammad. "Optical thermal and economic optimisation of a linear Fresnel collector." Thesis, University of Pretoria, 2017. http://hdl.handle.net/2263/61313.

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Solar energy is one of a very few low-carbon energy technologies with the enormous potential to grow to a large scale. Currently, solar power is generated via the photovoltaic (PV) and concentrating solar power (CSP) technologies. The ability of CSPs to scale up renewable energy at the utility level, as well as to store energy for electrical power generation even under circumstances when the sun is not available (after sunset or on a cloudy day), makes this technology an attractive option for sustainable clean energy. The levelised electricity cost (LEC) of CSP with thermal storage was about 0.16-0.196 Euro/kWh in 2013 (Kost et al., 2013). However, lowering LEC and harvesting more solar energy from CSPs in future motivate researchers to work harder towards the optimisation of such plants. The situation tempts people and governments to invest more in this ultimate clean source of energy while shifting the energy consumption statistics of their societies from fossil fuels to solar energy. Usually, researchers just concentrate on the optimisation of technical aspects of CSP plants (thermal and/or optical optimisation). However, the technical optimisation of a plant while disregarding economic goals cannot produce a fruitful design and in some cases may lead to an increase in the expenses of the plant, which could result in an increase in the generated electrical power price. The study focused on a comprehensive optimisation of one of the main CSP technology types, the linear Fresnel collector (LFC). In the study, the entire LFC solar domain was considered in an optimisation process to maximise the harvested solar heat flux throughout an imaginary summer day (optical goal), and to minimise cavity receiver heat losses (thermal goal) as well as minimising the manufacturing cost of the plant (economic goal). To illustrate the optimisation process, an LFC was considered with 12 design parameters influencing three objectives, and a unique combination of the parameters was found, which optimised the performance. In this regard, different engineering tools and approaches were introduced in the study, e.g., for the calculation of thermal goals, Computational Fluid Dynamics (CFD) and view area approaches were suggested, and for tackling optical goals, CFD and Monte-Carlo based ray-tracing approaches were introduced. The applicability of the introduced methods for the optimisation process was discussed through case study simulations. The study showed that for the intensive optimisation process of an LFC plant, using the Monte Carlo-based ray-tracing as high fidelity approach for the optical optimisation objective, and view area as a low fidelity approach for the thermal optimisation objective, made more sense due to the saving in computational cost without sacrificing accuracy, in comparison with other combinations of the suggested approaches. The study approaches can be developed for the optimisation of other CSP technologies after some modification and manipulation. The techniques provide alternative options for future researchers to choose the best approach in tackling the optimisation of a CSP plant regarding the nature of optimisation, computational cost and accuracy of the process.
Thesis (PhD)--University of Pretoria, 2017.
Mechanical and Aeronautical Engineering
PhD
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Ying, Xiaomin. "Statistical ray-tracing analysis of the linear Fresnel mirror solar concentrator." Virtual Press, 1993. http://liblink.bsu.edu/uhtbin/catkey/897508.

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The Monte Carlo-type statistical ray-tracing method was used to investigate the performance of the line-focusing Fresnel mirror solar concentrator. An optical model of the line-focusing Fresnel mirror concentrator using the statistical ray-tracing approach was developed. Many rays of sunlight from the solar disk were selected at random and traced through the concentrator in this model. This optical model permits calculation of the local and geometric concentration ratios. The latter requires an energyloss analysis. Small sun-tracking errors of the diurnal or transverse type were included in the model.Based on the optical model and the Monte Carlo-type statistical ray-tracing method, a computer program was written implementing the model and computations using Pascal. To facilitate performance comparisons, a baseline concentrator design was adopted. To study the effects of imperfect tracking, performance data were generated for small tracking errors up to approximately two and one-half degrees. The selected mirror configuration permitted comparisons between the statistical approach and previous applications of the "extreme ray" analysis for an imperfectly tracking mirror concentrator.Simulation results demonstrated that the concentration characteristics are highly sensitive to the tracking error. The geometric concentration ratio dramatically decreases when the tracking error increases, which is the same as the "extreme ray" analysis. Results of some typical numerical calculations are presented graphically and discussed.
Department of Physics and Astronomy
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Negreiros, Igor Soares. "Development of a system tracking of solar concentrator prototype linear fresnel." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14016.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico
Amid the great crisis of the energy, new methods for electric power generation, especially those do not harm the environment, are constantly sought to meet the growing need worldwide. Among them, the use of Fresnel linear concentrators becomes increasingly feasible, due to have lower cost in comparison to other types of solar concentrators. Thus, the project seeks to develop techniques that optimize use of the system where the main objective is to implement and validate the tracking system for a prototype of linear Fresnel solar concentrator, operating between approximately 7:30 and 16:30 in Fortaleza, CearÃ. For that, it used microcontrollers, sensors and motors to design a system capable of tracking Solar light system. The characterization and validation of the inductive position sensor used is also an important part of the work. To perform the tracking system, have been used a theoretical methodology for relative location of the sun, beyond the gain scheduling technique in control of employee movement. The position sensor validation have a maximum error than 0.3Â. Therefore, can consider that, with the use of the techniques employed for the achievement of system of control, the medium error obtained was about 0.06Â, making the design perform the concentration of solar rays in the absorber concentrator with a maximum deviation of 0.5Â, providing the desired reliability for system use.
Em meio Ãs grandes crises no ambiente energÃtico novos mÃtodos para geraÃÃo de energia elÃtrica, principalmente aqueles que nÃo agridem o meio ambiente, sÃo procurados constantemente para suprir a crescente necessidade mundial. Dentre eles, o uso de concentradores Solares do tipo Fresnel linear torna-se cada vez mais viÃvel, devido possuir custo inferior a outros tipos de concentradores solar. Com isso, procura-se desenvolver tÃcnicas que otimizem o uso do modelo onde o principal objetivo deste trabalho à implementar e validar o sistema de rastreamento de um protÃtipo de concentrador solar Fresnel linear, com funcionamento compreendido aproximadamente entre 7:30 e 16:30 h, na cidade de Fortaleza, CearÃ. Para tanto, utilizou-se microcontroladores, sensores e motores para projetar um sistema capaz de rastrear a luz Solar. A caracterizaÃÃo e validaÃÃo do sensor de posiÃÃo indutivo utilizado tambÃm à parte importante do trabalho. Para a realizaÃÃo do rastreamento empregou-se uma metodologia teÃrica para localizaÃÃo relativa do Sol, alÃm da tÃcnica de escalonamento de ganho no controle do movimento empregado. A validaÃÃo do sensor de posiÃÃo foi realizada encontrando-se um erro mÃximo em torno de 0,3Â. Portanto, pode-se considerar que, com a utilizaÃÃo das tÃcnicas abordadas para a realizaÃÃo do controle do sistema o erro mÃdio obtido foi cerca de 0,06Â, fazendo com que o projeto realizasse a concentraÃÃo dos raios solares no absorvedor do concentrador com um desvio mÃximo de 0.5Â, fornecendo ao sistema a confiabilidade desejada para sua utilizaÃÃo.
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Muller, Jair Carlos. "Estudo geométrico de um refletor fresnel linear para produção de energia térmica." Universidade do Vale do Rio dos Sinos, 2016. http://www.repositorio.jesuita.org.br/handle/UNISINOS/6031.

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CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico
Este trabalho apresenta um estudo geométrico de um refletor Fresnel linear para a produção de energia térmica com uso de um rastreador solar para orientação dos espelhos. A realização deste trabalho teve como base o estudo do sistema de coordenadas empregado para o cálculo da inclinação dos espelhos em função da posição do Sol em um determinado instante. O método utilizado considera que a radiação direta proveniente do Sol atinja o centro do espelho, cuja inclinação a cada instante permite a reflexão dessa radiação para o centro do absorvedor, situado a uma dada altura em relação ao plano contendo o eixo dos espelhos. Através do estudo da inclinação dos espelhos, foram analisadas as influencias causadas pela distância entre espelhos, altura do receptor, largura dos espelhos e o número de espelhos. Com estes parâmetros analisados, implementou-se uma simulação em MATLAB que forneceu valores de potência refletida no plano de entrada do concentrador secundário, valores de perdas por sombreamento, bloqueio, desfocagem e posição angular de cada fileira de espelho. Tendo estes dados como base foi construído um rastreador solar controlado por um micro controlador Arduino, que permite orientar as fileiras de espelhos com um único motor e eixo de acoplamento. O programa no micro controlador verifica data e hora como dados iniciais, depois as coordenadas geográficas de latitude 29º 45’ 17,979” S e longitude 51º 9’ 1,019” W do local. Assim, foi possível comprovar, através de imagens refletidas pelos espelhos no receptor secundário, que os parâmetros de posição angular estão corretos e que a concentração dos raios solares no absorvedor do concentrador secundário tem precisão adequada, fornecendo ao sistema confiabilidade para sua utilização.
This paper presents a geometric study of a linear Fresnel reflector for the production of thermal energy with use of a solar tracker for orientation of mirrors. This work was based on the study of the coordinate system used for the calculation of the slope of the mirrors as function of the sun’s position at a given time. The method considers that the solar direct radiation reaches the center of the mirror, whose slope at each instant allows the reflection of this radiation to the center of the absorber located at a given height from the plane containing the axis of the mirrors. Through the study of slope of mirrors, were analyzed the influences caused by the distance between mirrors, the height of receiver, width of the mirrors and the number of mirrors. With these parameters, it was implemented a simulation in MATLAB which provided power values reflected in the secondary concentrator inlet plane, values of losses by shading, blocking, by defocus and the angular position of each row of mirror. Having these data as base was built a controlled solar tracker by an Arduino micro controller, which allows directing the rows of mirrors with a single engine and coupling shaft. The program in micro controller checks the date and time as initial data, then the geographical coordinates of latitude 29° 45 ' 17.979 "S and longitude 51° 9 ' 1.019" W the local. Thus, it was possible to prove, through images reflected by mirrors on the secondary receiver, that the angular position parameters are correct and that the concentration of sunrays in the absorber secondary hub has adequate accuracy, providing the system reliability for its use.
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Almeida, Geraldo Samuel Marques. "Pesquisa e desenvolvimento de um sistema termoelétrico do tipo linear fresnel reflector." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/9121.

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Dissertação para obtenção do Grau de Mestre em Energias Renováveis – Conversão Elétrica e Utilização Sustentável
A pesquisa de novos conceitos e materiais relacionados com a energia solar concentrada têm despertado o interesse dos mais variados grupos industriais e instituições científicas. Este interesse é justificado pelo baixo custo de investimento e pelos elevados rendimentos de conversão, que são típicos neste tipo de tecnologia solar. O projeto em curso não surgiu para resolver um problema concreto do mercado, ou da indústria de energia solar, mas sim, para desenvolver uma aplicação de pequena escala, para um concentrador solar inovador do tipo refletor linear Fresnel. Este projeto reveste-se de alguma importância para as energias renováveis. Pois, se for bem sucedido, uma pessoa comum poderá passar a produzir eletricidade e águas quentes. O projeto em curso aborda a metodologia necessária no desenvolvimento de um concentrador solar do tipo refletor linear Fresnel, nomeadamente as eficiências térmica e ótica. As quais estão relacionadas respetivamente com os aspetos de transferência de calor e com os parâmetros de construção. O protótipo é composto por seis refletores orientados para um recetor trapezoidal de cavidade aberta. Colocado no foco do recetor, encontra-se um absorvedor pintado com tinta seletiva. O recetor linear está elevado sobre os espelhos que possuem uma orientação norte-sul, favorável à captação dos raios solares ao longo do dia. O sistema desenvolvido mostrou durante os testes realizados em ambiente real, bons resultados ao nível da temperatura atingida e ao nível do rendimento ótico. Porém a experiência sugere que o seguimento solar neste tipo de concentrador seja uma questão a ser debatida em trabalhos futuros. Os dois objetivos que o projeto visa atingir são: a comparação entre o concentrador Disco Parabólico com o LFR e a implementação de um modo de armazenamento direto de calor.
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Negreiros, Igor Soares. "Desenvolvimento do sistema de rastreamento de um protótipo de concentrador solar fresnel linear." reponame:Repositório Institucional da UFC, 2015. http://www.repositorio.ufc.br/handle/riufc/11682.

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NEGREIROS, I. S. Desenvolvimento do sistema de rastreamento de um protótipo de concentrador solar fresnel linear. 2015. 115 f. Dissertação (Mestrado em Engenharia Elétrica) - Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, 2015.
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Amid the great crisis of the energy, new methods for electric power generation, especially those do not harm the environment, are constantly sought to meet the growing need worldwide. Among them, the use of Fresnel linear concentrators becomes increasingly feasible, due to have lower cost in comparison to other types of solar concentrators. Thus, the project seeks to develop techniques that optimize use of the system where the main objective is to implement and validate the tracking system for a prototype of linear Fresnel solar concentrator, operating between approximately 7:30 and 16:30 in Fortaleza, Ceará. For that, it used microcontrollers, sensors and motors to design a system capable of tracking Solar light system. The characterization and validation of the inductive position sensor used is also an important part of the work. To perform the tracking system, have been used a theoretical methodology for relative location of the sun, beyond the gain scheduling technique in control of employee movement. The position sensor validation have a maximum error than 0.3º. Therefore, can consider that, with the use of the techniques employed for the achievement of system of control, the medium error obtained was about 0.06°, making the design perform the concentration of solar rays in the absorber concentrator with a maximum deviation of 0.5°, providing the desired reliability for system use
Em meio às grandes crises no ambiente energético novos métodos para geração de energia elétrica, principalmente aqueles que não agridem o meio ambiente, são procurados constantemente para suprir a crescente necessidade mundial. Dentre eles, o uso de concentradores Solares do tipo Fresnel linear torna-se cada vez mais viável, devido possuir custo inferior a outros tipos de concentradores solar. Com isso, procura-se desenvolver técnicas que otimizem o uso do modelo onde o principal objetivo deste trabalho é implementar e validar o sistema de rastreamento de um protótipo de concentrador solar Fresnel linear, com funcionamento compreendido aproximadamente entre 7:30 e 16:30 h, na cidade de Fortaleza, Ceará. Para tanto, utilizou-se microcontroladores, sensores e motores para projetar um sistema capaz de rastrear a luz Solar. A caracterização e validação do sensor de posição indutivo utilizado também é parte importante do trabalho. Para a realização do rastreamento empregou-se uma metodologia teórica para localização relativa do Sol, além da técnica de escalonamento de ganho no controle do movimento empregado. A validação do sensor de posição foi realizada encontrando-se um erro máximo em torno de 0,3º. Portanto, pode-se considerar que, com a utilização das técnicas abordadas para a realização do controle do sistema o erro médio obtido foi cerca de 0,06º, fazendo com que o projeto realizasse a concentração dos raios solares no absorvedor do concentrador com um desvio máximo de 0.5º, fornecendo ao sistema a confiabilidade desejada para sua utilização
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Scalco, Patricia. "Análise óptica e térmica do receptor de um sistema de concentradores Fresnel lineares." Universidade do Vale do Rio dos Sinos, 2016. http://www.repositorio.jesuita.org.br/handle/UNISINOS/6231.

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CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico
O estudo de diferentes fontes de energia é de extrema importância, tanto em termos econômicos e sociais, como no âmbito ambiental. Assim, o uso da energia solar para a geração de calor para alimentar processos que necessitam de temperaturas em torno de 300 ºC aparece como uma alternativa para suprir o uso de combustíveis fósseis em ambientes industriais, seja de forma parcial ou total. Para atingir essa faixa de temperatura, devem ser utilizados equipamentos de alto desempenho e que possam concentrar ao máximo a radiação solar. Assim, é utilizada a tecnologia de refletores Fresnel lineares, que se baseia no princípio de concentração solar, onde os raios solares incidem em espelhos que refletem essa radiação para um receptor. O receptor é composto por um tubo absorvedor e por uma segunda superfície refletora, conhecida como concentrador secundário, que tem como função maximizar a quantidade de raios absorvidos pelo receptor. Esse tipo de instalação tem se mostrado competitiva diante de outros tipos de concentração solar devido à sua estrutura simples, custo reduzido e fácil manutenção. Assim, neste trabalho serão analisados aspectos ópticos e térmicos do conjunto do receptor, tanto para o concentrador secundário do formato trapezoidal como para o CPC. Para isso, o estudo foi dividido em duas etapas. Na primeira etapa foi feito o traçado de raios para as duas geometrias do concentrador secundário estudadas afim de determinar o fator de interceptação e as perdas ópticas envolvidas neste processo. Além disso, foi analisada a influência da inserção de uma superfície de vidro na base do receptor. A segunda etapa consistiu na análise térmica, onde foi feito o estudo da transferência de calor no receptor com a finalidade de determinar a eficiência do sistema, bem como os fatores que influenciam no desempenho do mesmo. Na análise geométrica, o fator de interceptação para a concentrador secundário do tipo trapezoidal foi de 36% para o receptor aberto e 45% para o receptor com o fechamento de vidro. Para o concentrador secundário do tipo CPC, os resultados foram de 44% para o receptor aberto e 56% para o receptor isolado com vidro. Através da análise térmica, foi possível estabelecer a eficiência do sistema que, para a melhor condição de trabalho, DNI de 1000 W/m², foi de 80%.
The study of different energy sources is extremely important, both in economic and social scope, as well as in the environmental field. Thus, the use of solar energy for the generation of heat to feed processes that require temperatures around 300 ºC appears as an alternative to supply the use of fossil fuels in industrial environments, either partially or totally. To reach this temperature range, high-performance equipment must be used that can concentrate solar radiation to the maximum. Thus, Fresnel linear reflector technology is used, which uses the principle of solar concentration, where the solar rays focus on mirrors that reflect this radiation to the receiver. The receiver is composed of an absorber tube and a second reflecting surface whose function is to maximize the number of rays absorbed by the receiver. This type of installation has been competitive in comparison to other types of solar concentration because of its simple structure, low cost and easy maintenance. Thus, in this work will be analyzed optical and thermal aspects of the receiver set for the trapezoidal and the CPC secondary concentrator. For this, the study was divided into two stages. In the first stage the ray tracing was done for the two geometries of the secondary concentrator studied in order to determine the interception factor and the optical losses involved in this process. In addition, the influence of insertion of a glass surface on the base of the receptor was isolated by isolating it from the environment. The second stage consisted of the thermal analysis, where the heat transfer study was carried out in the receiver in order to determine the efficiency of the system as well as the factors that influence the performance of the system. In the geometric analysis, the interception factor for the trapezoidal secondary concentrator was 36% for the open receptor and 45% for the receptor with the glass enclosure. For the CPC secondary concentrator, the results were 44% for the open receptor and 56% for the receptor with the glass enclosure. Through the thermal analysis, it was possible to establish the efficiency of the system, which, for the best working condition, DNI of 1000 W/m², was 80%.
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Schlaifer, Perrine. "Performance Calculations and Optimization of a Fresnel Direct Steam Generation CSP Plant with Heat Storage." Thesis, KTH, Kraft- och värmeteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-116806.

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This master thesis deals with the performance calculations of a 9MW linear Fresnel CSP plant withdirect steam generation built by the Solar Division of the CNIM Company. The aim was to calculate theannual electricity production taking into account the weather conditions as well as some steam storage.At first, a steam accumulator model was developed with Excel, in order to estimate the pressureevolution in the tanks during the charging, storage and discharging processes. The data obtained withthis model was then integrated to the thermodynamic cycle model, programmed with Excel, whichcalculated the electrical power production knowing the thermal power available in the solar field. Theelectricity production calculations were made every 600 seconds during one year.To improve the results accuracy, the influence of the plant location slope was estimated, calculating theequivalent azimuth and elevation angles in a new spherical coordinates system. For an average slope of4.21° at the plant location, the annual thermal energy gain is 14.4% (with a gain up to 60% duringwinter days) and the annual electricity production is increased by 12.59%. The influence of frost on themirrors during cold and humid nights was also estimated with a simple model of the energy needed toheat up a constant layer of ice. Depending on the assumptions, the electricity production losses werebetween 1.27 and 2.84% of annual electricity production. The losses due to plant shutdowns set by theelectrical network manager RTE during the snowmelt months were also estimated. The annualelectricity production could decrease by 8.02 to 11.57 % because of the load management, dependingon the days during which the plant is shutdown.Finally, an economic optimisation was led with prices estimated by CNIM, which gave an optimal solarfield design with 31 lines and 5 steam accumulators. The payback time would then be 9.887 years.
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Books on the topic "Linear Fresnel"

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Karathanasis, Stavros. Linear Fresnel Reflector Systems for Solar Radiation Concentration. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05279-9.

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Karathanasis, Stavros. Linear Fresnel Reflector Systems for Solar Radiation Concentration: Theoretical Analysis, Mathematical Formulation and Parameters’ Computation using MATLAB. Springer, 2019.

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T. Wave Phenomena. Courier Dover Publications, 2014.

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Book chapters on the topic "Linear Fresnel"

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Häberle, Andreas. "Linear Fresnel Collectors linear Fresnel collector." In Encyclopedia of Sustainability Science and Technology, 6031–37. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0851-3_679.

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Häberle, Andreas. "Linear Fresnel Collectors." In Solar Energy, 72–78. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-5806-7_679.

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Häberle, Andreas. "Linear Fresnel Collectors." In Encyclopedia of Sustainability Science and Technology, 1–8. New York, NY: Springer New York, 2021. http://dx.doi.org/10.1007/978-1-4939-2493-6_679-3.

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Karathanasis, Stavros. "Linear Fresnel Reflector Systems Design Parameters." In Linear Fresnel Reflector Systems for Solar Radiation Concentration, 97–136. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05279-9_4.

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Karathanasis, Stavros. "Case Study—Fresnel Reflector Solar Cookers." In Linear Fresnel Reflector Systems for Solar Radiation Concentration, 277–303. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05279-9_8.

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Karathanasis, Stavros. "Concentration of Solar Radiation." In Linear Fresnel Reflector Systems for Solar Radiation Concentration, 1–12. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05279-9_1.

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Karathanasis, Stavros. "Applications." In Linear Fresnel Reflector Systems for Solar Radiation Concentration, 337–48. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05279-9_10.

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Karathanasis, Stavros. "Solar Radiation." In Linear Fresnel Reflector Systems for Solar Radiation Concentration, 13–72. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05279-9_2.

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Karathanasis, Stavros. "Geometric Optics." In Linear Fresnel Reflector Systems for Solar Radiation Concentration, 73–96. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05279-9_3.

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Karathanasis, Stavros. "Geometric Optical Losses." In Linear Fresnel Reflector Systems for Solar Radiation Concentration, 137–84. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05279-9_5.

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Conference papers on the topic "Linear Fresnel"

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Pu, Shaoxuan, and Chaofeng Xia. "End-Effect of Linear Fresnel Collectors." In 2011 Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2011. http://dx.doi.org/10.1109/appeec.2011.5748793.

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Mills, David R. "Optical Aspects of Linear Fresnel Reflector Design." In Optics and Photonics for Advanced Energy Technology. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/energy.2009.wd6.

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Elmaanaoui, Youssef, and Dennoun Saifaoui. "Shading efficiency calculation for Linear Fresnel reflector." In 2014 International Renewable and Sustainable Energy Conference (IRSEC). IEEE, 2014. http://dx.doi.org/10.1109/irsec.2014.7059805.

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Leutz, Ralf, Akio Suzuki, Atsushi Akisawa, and Takao Kashiwagi. "Nonideal concentration of nonimaging linear Fresnel lenses." In International Symposium on Optical Science and Technology, edited by Roland Winston. SPIE, 2001. http://dx.doi.org/10.1117/12.448808.

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Zhu, Guangdong, Mike Wagner, Tim Wendelin, and Chuck Kutscher. "Performance Evaluation and Outlook of Utility-Scale Linear Fresnel Technology." In ASME 2013 7th International Conference on Energy Sustainability collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/es2013-18069.

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As one of the viable concentrating solar power (CSP) technologies, linear Fresnel collectors differ from parabolic troughs by virtue of their low-profile mirror arrays and fixed receiver assemblies. This technology is capable of achieving high concentration ratios and so is applicable to high-temperature solar power plant designs. In addition, its low wind profile and linear nature lead to low system and operation and maintenance (O&M) costs. In this report two linear Fresnel solar plant configurations, namely a direct steam generation (DSG) system and a direct high-temperature molten-salt plant, are examined via a levelized cost of electricity (LCOE) analysis. By treating LCOE as a function of the annual investment energy return (IER, or the ratio of annual net electricity to the total direct system cost) under various assumptions of O&M cost, a few plant scenarios employing high-temperature linear Fresnel technology are carefully configured to meet the aggressive LCOE goals of 8 cents/kWh and 6 cents/kWh. The latter is the Department of Energy (DOE) SunShot Initiative goal aimed at making CSP cost competitive in the current energy market. In particular, a linear Fresnel scenario with the potential to meet the SunShot goal is featured with a collector cost of $100/m2, an annual system energy efficiency of 18%, a storage system cost of $15/kWh-th, and an O&M cost of $7.5/MWh. One of the most aggressive assumptions is an advanced power block with about 52% cycle efficiency and a turbine inlet temperature of 700°C. This work addresses unanswered questions regarding linear Fresnel cost and performance and identifies future research and development directions for linear Fresnel technology, including economic optimization of collectors and receivers, development of physical plant performance models, development of automated O&M mechanisms and sophisticated plant control software.
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Hakkarainen, Elina, Matti Tähtinen, and Hannu Mikkonen. "Dynamic Model Development of Linear Fresnel Solar Field." In ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/es2015-49347.

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As a dispatchable clean energy source, concentrated solar power (CSP) can be one of the key technologies to overcome many problems related to fossil fuel consumption and electricity balancing problems. Solar is a variable location, time and weather dependent source of energy, which sets challenges to solar field operations. With proper dynamic simulation tools it is possible to study dynamics of CSP field under changing weather conditions, find optimum control strategies, and plan and predict the performance of the field. CSP technology considered in this paper, linear Fresnel reflector (LFR), is a proven line focusing technology, having simpler design but suffering in optical performance compared to more mature parabolic trough (PT) technology. Apros dynamic simulation software is used to configure and simulate the solar field. Apros offers a possibility to dynamically simulate field behavior with varying collector configuration, field layout and control mode under varying irradiation conditions. The solar field applies recirculation (RC) as a control mode and direct steam generation (DSG) producing superheated steam. DSG sets challenges for the control scheme, which main objective is to maintain constant steam pressure and temperature at the solar field outlet under varying inlet water and energy conditions, while the steam mass flow can vary. The design and formulation of an entire linear Fresnel solar field in Apros is presented, as well as the obtained control scheme. The field includes user defined amount of collector modules, control system and two modules describing solar irradiation on the field. As two-phase water/steam flow is used, an accurate 6-equation model is used in Apros. Irradiation on the solar field under clear sky conditions is calculated according to time, position and Linke turbidity factor. Overcast conditions can be created by the clear sky index. For LFR single-axis sun tracking system is applied. In order to test the model functionality and to investigate the field behavior, thermal performance of the field was simulated at different dates at two different locations, and the results were compared. Similar field dimensions and control schemes were applied in each case, and simulations were done for full 24 hours in order to study the daily operations and ensure process stability. Control scheme functionality is evaluated based on the plant behavior in simulation cases having different operational conditions. The proper operability of the configured LFR model is evaluated. Obtained performance results show differences between locations and variation depending on season and time. The importance of a proper control system is revealed. The results show that the dynamic model development of a solar field is necessary in order to simulate plant behavior under varying irradiation conditions and to further develop optimal field control schemes and field optimizing process. The future work in the development of the LFR model presented will focus on dynamic response behavior development under transient conditions and field start-up and shut down procedure development.
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Benyakhlef, Sara, Ahmed Al Mers, Abdelfattah Bouatem, Noureddine Boutammachte, and Ossama Merroun. "Performance analysis of a Parabolic Linear Fresnel system." In 2015 3rd International Renewable and Sustainable Energy Conference (IRSEC). IEEE, 2015. http://dx.doi.org/10.1109/irsec.2015.7455031.

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Gabriel Ivan Medina Tapia and Gabriel da Silva Lima. "IRRADIANCE OPTIMIZATION FOR APPLICATION IN LINEAR FRESNEL COLLECTORS." In 23rd ABCM International Congress of Mechanical Engineering. Rio de Janeiro, Brazil: ABCM Brazilian Society of Mechanical Sciences and Engineering, 2015. http://dx.doi.org/10.20906/cps/cob-2015-0180.

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Park, Yeonjoon, Hargsoon Yoon, Uhn Lee, Glen C. King, and Sang Choi. "Mathematical simulation for integrated linear Fresnel spectrometer chip." In SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, edited by Vijay K. Varadan. SPIE, 2012. http://dx.doi.org/10.1117/12.917505.

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Ardekani, Mohammad Moghimi, Ken J. Craig, and Josua P. Meyer. "Optimization of insulation of a linear Fresnel collector." In SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems. Author(s), 2017. http://dx.doi.org/10.1063/1.4984401.

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Reports on the topic "Linear Fresnel"

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Viljoen, Nolan, and Nathan Schuknecht. Commercial Development of an Advanced, High-Temperature, Linear-Fresnel Based Concentrating Solar Power Concept. Office of Scientific and Technical Information (OSTI), May 2012. http://dx.doi.org/10.2172/1183765.

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