The high energy density and stable temperature fields of latent heat thermal storage devices (LHTSD) make them promising in a range of applications, including solar energy storage, solar cooking, home heating and cooling, and thermal buffering. The chief engineering challenge in building an effective LHTSD is to find a way to complement the storage capabilities provided by the low-conductivity phase-change material with a suitable enhanced heat transfer mechanism. The principal aim of this project is to develop a tool to improve the design of a small-scale LHTSD, such as one that might be used in solar cooking for a family. An effective small-scale storage device would need to absorb solar energy quickly, release the energy at a high temperature, be affordable, and be manageable within a small household. An LHTSD using solar salts fulfills the latter two requirements: solar salts, a near-eutectic mixture of NaNO3 and KNO3 (60/40% by mass) commonly used in thermal storage applications, are inexpensive and widely available, and the use of latent heat storage means a relatively small chamber can hold enough energy to cook a family meal. The challenge, however, is to design a device that absorbs and releases energy from the solar salts, which have a very low thermal conductivity. The most practical tool to improve the spread of heat through the salts is a finned metal core within the LHTSD. This project uses numerical simulation to determine the most effective design of this finned core. A Cartesian grid solver is developed that is capable of simulating the convection-dominated melting processes within the storage device. The phase boundary is tracked using the enthalpy method, and conjugate heat transfer is calculated with a strongly coupled implicit scheme. A number of techniques are then used to with this solver in order to better understand the factors that affect the performance of a LHTSD and to improve the design of such devices. The thesis is organized as an introductory section followed by three case studies. In the first section, the project is introduced, and the governing equations and core numerical methods are described. In addition, a set of test simulations demonstrate that results using the developed numerical scheme match those of a range of experimental and numerical benchmarks. Each of the case studies aims to adapt the numerical scheme to a more specific problem concerning LHTSDs. In the first, the performance of four fin designs are compared over long-term (48 hour) simulations; the aim is to test the potential performance of the four LHTSDs given realistic solar conditions in New Delhi, India. In the second case study, a set of physical experiments are performed in an empty and a finned LHTSD, and matched 3-dimensional numerical simulations are used to explore the thermal, melt, and flow behavior of the solar salts with the chambers. The final study uses the computational scheme to optimize the design of the finned core of an LHTSD over a large parameter space. To optimize the best design, the key parameters are first prescreened to find which three parameters have the largest effect on the objective equation. A machine-learning optimization code using the dynamic Kriging method (DKG) is then used to build a response surface from which the optimized design can be determined. These three cases demonstrate the potential of the numerical scheme to explore the performance of finned LHTSD designs in a range of ways: the scheme can be used to predict behavior of devices in realistic conditions, to explore the behavior of solar salts during the melting and solidification process, and to determine an optimal design within a large parameter space. In doing so, they show the potential of this tool to help improve the performance and practicality of small-scale LHTSDs.

CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior / Extensive research and development activities have been conducted to explore opportunities for sustainable and viable methods of producing potable water using solar energy. This project included a new configuration for the solar cooker with indirect heating, which also operates as a desalination unit. The objective was to develop a new cooking pan which could be coupled with a three-stage desalination tower. Thus, the pan could be used for cooking or as the storage tank of the desalination tower. This new pan was installed in a solar cooker with indirect heating and the complete system was tested under field conditions. The sealing was improved, and the system produced more than 5.7L, with electrical conductivity lower than 10ÂS/cm, COP, 1.77 and GOR, 0,35, values consistent with the literature and above the values obtained with the original pan. / Extensivas atividades de pesquisa e desenvolvimento vÃm sendo conduzidas para explorar oportunidades de mÃtodos sustentÃveis e viÃveis de produÃÃo de Ãgua potÃvel utilizando energia solar. Este projeto abrange uma nova configuraÃÃo para o fogÃo solar com aquecimento indireto operar tambÃm como dessalinizador. O objetivo foi desenvolver uma nova panela que pode ser acoplada com uma torre de trÃs estÃgios de dessalinizaÃÃo. Assim, a panela pode ser utilizada tanto para cozinhar ou como o tanque de armazenamento da torre de dessalinizaÃÃo. Esta nova panela foi instalada em um fogÃo solar com aquecimento indireto e todo o sistema foi testado em condiÃÃes de campo. O acoplamento foi otimizado, aumentando a produÃÃo total em relaÃÃo ao projeto anterior. O sistema produziu mais de 5,7L de Ãgua dessalinizada, com condutividade elÃtrica mÃdia abaixo de 10ÂS/cm, COP, 1,77 e GOR 0,35, valores compatÃveis com a literatura e acima dos valores obtidos com a panela original.

Orientador: Prof. Dr. João Batista de Aguiar / Dissertação (mestrado) - Universidade Federal do ABC, Programa de Pós-Graduação em Engenharia Mecânica, 2016. / No Haiti, bem como em regiões do norte e nordeste do Brasil, os recursos florestais são utilizados como lenha ou transformado em carvão vegetal para fins de cocção, principalmente pela população de baixa renda. Através desta ideia, este trabalho é desenvolvido apresentando um conceito de um fogão solar acessível de tipo caixa, utilizando materiais de baixo custo e técnicas simples de construção. A fim de desenvolver uma primeira análise de ordem do fogão, o problema de transferência de calor transiente é formulado e o sistema de equações diferenciais são escritos e resolvidos. Diferentes cenários e parâmetros são considerados para compreender a importância do problema. Foram utilizadas dimensões, formas e materiais alternativos ao apresentado na literatura. Um modelo físico do fogão solar foi construído no local em questão "Haiti" e medições de temperaturas realizadas e comparadas com as previsões numéricas. A partir da analise dos resultados, chegou-se às conclusões. Outras adições à solução também foram incluídas, a resposta obtida foi demostrada, de forma a apresentar se os resultados são aceitáveis. / In Haiti as well as in northern and northeastern of Brazil, forest resources are used as wood or transformed into charcoal for cooking, mostly by poor people. Through this idea, this work presents a concept of an affordable box type solar oven, using cheap materials and easy construction techniques. In order to develop a first order analysis of the oven, the transient heat transfer problem is formulated, the system of differential equations written and solved. Different scenarios and parameters are used to understand the importance to the problem. Variations range from dimensions, forms and materials. A physical model of the oven is constructed in locus "Haiti" and temperature measurements performed and compared to numerical predictions. The results are analyzed and conclusions drawn. Other additions to the solution are included, obtained answer is presented in order to show whether it is acceptable.

CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior / This work presents two new prototypes of a circular desalinator operation in a solar cooker for indirect heating. The first prototype, called Type A, produces desalinated water from brackish water deposited in the pan solar cooker. In the second prototype, the Type B, the brackish water pan is used only as a means of transfering heat to the first tray tower desalination. These prototypes were fabricated and tested in LESGN (Solar Energy Laboratory and Natural Gas). Its structure consists of stainless steel plates, trays with circular and inclined downwards (with circular trays to facilitate the flow of condensed water) and "pipes" (that harvest desalinated water and take out the stages and side rails, harvesting the water that condenses the side walls). The desalting tower was formed by a set of trays to facilitate the handling and operation. The experiments were conducted between 7.00am and 5.00pm and the maximum number of stages was three. Experiments with 2 and 3 stages confirmed the heat recovery process, in other words, the repeated use of the heat stored in the desalinated water in a lower stage by stage above. The experimental results showed that the maximum production were daily for the Type A, 4.72 L with 3 stages, and the desalinator Type B 3.50 L also with 3 stages. It was found that the efficiency of desalination type A was greater than that of Type B, which explains why Type B has a further resistance to heat transfer. On the other hand, Type B prototype allows continued operation of the desalination tower, not requiring the dismantling after each emptying process of the water in the pan / Este trabalho apresenta dois novos protÃtipos de um dessalinizador circular para operaÃÃo em um fogÃo solar de aquecimento indireto. O primeiro protÃtipo, denominado Tipo A, produz Ãgua dessalinizada a partir da Ãgua salobra depositada na panela do fogÃo solar. No segundo protÃtipo, o Tipo B, a Ãgua salobra da panela à usada apenas como meio de transferÃncia de calor para a primeira bandeja da torre de dessalinizaÃÃo. Estes protÃtipos foram fabricados e testados no LESGN (LaboratÃrio de Energia Solar e GÃs Natural). Sua estrutura à formada por chapas de aÃo inoxidÃvel com bandejas circulares e inclinadas para baixo, com bandejas circulares para facilitar o escoamento da Ãgua condensada, âcachimbosâ, que colhem a Ãgua dessalinizada e levam para fora dos estÃgios e calhas laterais, que colhem a Ãgua que condensa pelas paredes laterais. A torre de dessalinizaÃÃo foi formada por um conjunto de bandejas para facilitar o manuseio e operaÃÃo. Os experimentos foram realizados entre 7 e 17 hs e o nÃmero mÃximo de estÃgios foi trÃs. Os experimentos com 2 e 3 estÃgios confirmaram o processo de recuperaÃÃo de calor, ou seja, a utilizaÃÃo repetida do calor armazenado na Ãgua dessalinizada em um estÃgio inferior pelo estÃgio superior. Os resultados experimentais mostraram que as mÃximas produÃÃes diÃrias foram, para o Tipo A, de 4,72 L com 3 estÃgios, e para o dessalinizador Tipo B, 3,50 L com 3 estÃgios. Verificou-se que a eficiÃncia do dessalinizador Tipo A era superior ao do Tipo B, o que se explica por o Tipo B ter uma resistÃncia a transferÃncia de calor a mais. Por outro lado, o protÃtipo Tipo B permite uma operaÃÃo continuada da torre de dessalinizaÃÃo, nÃo sendo necessÃrio a sua desmontagem apÃs cada esvaziamento da Ãgua na panela.

This thesis introduces an analysis and dimensioning of a solar powered solution for enabling clean and sustainable cooking in developing areas. Access to clean cooking is a great  challenge  hindering human development, with significant health, environmental, and economic implications. The proposed solution is analysed and modelled in this work. Recommendations are given on the development of the project, reviewing the critical factors for its success. The solution is a novel approach for providing power for cooking through solar energy. Targeted market segment is institutional cooking, where current cooking fuels are commonly based on firewood and charcoal. The system integrates a solar trough collector array, an oil heat storage,     a heating unit for the cooking recipient, and two thermosiphons for transporting the heat between each component. The technology is under development, requiring an accurate analysis and further work in the design. The work presented analyses the solution and its implementation in a specific case study. A modelling software was built as a tool for dimensioning the technology and observing its behaviour. Moreover, specific values were obtained on the dimensions for the case study. A structured critic of the system through a deep review allowed for observations on risks, future work, and additional recommendations. Simulations for the case study enabled the first values on the dimensions of the system. Flexibility of the model was provided to repeat this exercise for future case studies. The analysis unexpected critical factors for the solution such as user behaviour and reviewed expected ones such as the insulation or the size of the heat storage. There are still many challenges to overcome for the success of the analyzed project. This thesis gives a basis for future work and strong guidance for the development of the solution.

Made available in DSpace on 2014-12-17T14:58:07Z (GMT). No. of bitstreams: 1 MiguelCMN_DISSERT.pdf: 16186905 bytes, checksum: 2eff0d12f0947aff6c9902b788587ee5 (MD5) Previous issue date: 2011-05-30 / It is presented a solar cooker made with a parabolic reflector composed by a composite material. For this purpose, it was utilized a cast concrete with a parabolic profile obtained by means of modeling. It will be demonstrated the manufacturing process and settings, as well as tests results, in order to determine the contact temperature and cooking time of some foods. This solar cooker presents the following main characteristics: the concentration method, low cost and easy manufacturing process. It was performed by employing recycled materials such as cement, plaster, crushed polystyrene and wheels. The captation area measures 1 square meter and its parabole was covered with a mirrors measuring 25 cm2. A temperature higher than 650?C was obtained. Furthermore, it has been demonstrated that the cooking viability for several type of foods such as beans, potatoes, rice, yams and pasta can be used in two meals for a family of four. In addition, the advantages of this cooker were analysed in comparison with others described in literature as well as those operating on gas. Especially in Northeast of Brazil, where there is a potential for solar energy, this prototype is an important tool, because it avoids not only desertification, but also pollutants from burning firewoods which cause ecological imbalance / Apresenta-se um fog?o solar a concentra??o com par?bola refletora constru?da com um material comp?sito. Foi utilizado um molde de concreto com perfil parab?lico obtido atrav?s da modelagem. Ser?o apresentados os processos de fabrica??o e montagem bem como os resultados de testes para determinar a temperatura de contacto e os tempos de cozedura de certos tipos de alimentos. O fog?o solar a concentra??o tem como principal caracter?stica seu custo baixo, sendo produzidos a partir de uma composi??o de materiais reutiliz?veis, como cimento, gesso e EPS triturado e pneus. Apresenta ?rea de capta??o de 1,0 metro quadrado e sua par?bola foi coberto com segmentos de espelhos de 25 cm?. As principais carracter?sticas do fog?o solar ? concentra??o propostas s?o seus f?ceis processos de fabrica??o, montagem e seu baixo custo. Obteve-se temperatura de foco superioor a 650?C. Demonstrou-se a viabilidade de coc??o desse fog?o solar para v?rios tipo de alimentos como feij?o, batata, arroz, inhame e macarr?o e podendo ser usado em duas refei??es para uma fam?lia de quatro pessoas. A competitividade do fog?o solar estudado com outros apontados pela literatura solar para coc??o de alimentos e at? mesmo com o fog?o a g?s para excelentes condi??es solarim?tricas. Este prot?tipo pode representar uma importante contribui??o para o uso de fog?es solares, especialmente no Nordeste, para o combate ? desertifica??o, e emiss?o de poluentes pelo uso massivo de lenha, que causa desequil?brio ecol?gico nessa regi?o

Made available in DSpace on 2014-12-17T14:58:07Z (GMT). No. of bitstreams: 1 RicardoEBRF_DISSERT.pdf: 4014057 bytes, checksum: 4ee7665398e3d4e0b140690a65f6b5c4 (MD5) Previous issue date: 2011-02-28 / Universidade Federal do Rio Grande do Norte / Given the growing environmental crisis caused by degradation, mainly due to the use of polluting energy sources, increasing the growing use of renewable energies worldwide, with emphasis on solar energy, an abundant supply and available to everyone, which can be harnessed in several ways: electricity generation; dehydration of food; heating, disinfection and distillation and cooking. The latter has as its primary feature the viability of clean, renewable energy for society, combating ecological damage caused by large-scale use of firewood for cooking foods, use in tropical countries with high solar radiation, and has funding NGOs throughout the world with the goal of achieving low-income population. The proposed project consists of a solar cooker for concentration, working from the reflection of sunlight by a hub that they converge to a focal point at the bottom of the pot, getting lots of heat. The solar cooker under study consists of two elliptical reflecting parabolas made from the recycling of scrap TV antenna, having 0.29 m? of surface area for each antenna, which were covered by multiple mirrors of 2 mm thick and mounted on a metal structure, with correction for the mobility of the apparent movement of the sun. This structure was built with the recycling of scrap metal, possessing a relatively low cost compared with other solar cookers, around US$ 50.00. This cost becomes negligible, since that will involve a great benefit to not have fuel costs for each meal, unlike the use of gas or firewood for cooking food. The tests show that the cooker has reached the maximum temperature of 740 ? C, for boiling water in an average time of 28 minutes, cooking various types of foods such as potatoes, rice and pasta in an average time of 45 minutes and still going as a solar oven, making pizza baking and meat. These cooking times do not differ much from the cooking times on a gas stove, it becomes the solar cooker as a good consumer acceptance, and furthermore not to deliver the same gases that can poison the food as with the wood stove. Proves the viability of using the stove to cook or bake in two daily meals for a family, still presenting a position to improve his performance with the addition of new materials, equipment and techniques / Diante da crescente crise ambiental provocada pela degrada??o, principalmente devido ao uso de fontes energ?ticas poluentes, cada vez mais, vem crescendo o uso de energias renov?veis em todo o mundo, tendo destaque para a energia solar, uma fonte abundante e dispon?vel a todos, que pode ser aproveitada de diversas maneiras como: gera??o de eletricidade; desidrata??o de alimentos; aquecimento, desinfec??o e destila??o de ?gua e coc??o. Este ?ltimo tem como aspecto primordial a viabiliza??o de energia limpa e renov?vel para a sociedade, combatendo os danos ecol?gicos causados pela utiliza??o em larga escala de lenha para o cozimento de alimentos, tendo utiliza??o em pa?ses tropicais com altos ?ndices de radia??o solar, possuindo financiamento de ONGS por todo o mundo com objetivo de atingir a popula??o de baixa renda. O projeto proposto consta de um fog?o solar ? concentra??o, funcionando a partir da reflex?o dos raios solares por um concentrador que converge os mesmos para um ponto focal no fundo da panela, recebendo grande quantidade de calor. O fog?o solar em estudo ? composto por duas par?bolas refletoras de forma el?ptica feitas a partir do reaproveitamento de sucatas de antena de TV, possuindo 0,29 m? de ?rea superficial para cada antena, que foram cobertas por m?ltiplos espelhos de 2 mm de espessura e montadas em uma estrutura met?lica com mobilidade para a corre??o do movimento aparente do sol. Esta estrutura foi constru?da com o reaproveitamento de sucata, possuindo um custo relativamente baixo, quando comparado com outros fog?es solares, em torno R$ 100,00. Este custo torna-se insignificante, uma vez que promover? um grande benef?cio em n?o possuir gastos com combust?vel para cada refei??o, diferente do uso do g?s ou de lenha para cozinhar alimentos. Os ensaios mostram que o fog?o chegou ? temperatura m?xima de 740?C, realizando a ebuli??o de ?gua em um tempo m?dio de 28 minutos, cozinhando diversos tipos de alimentos, como batata, arroz e macarr?o em um tempo m?dio de 45 minutos e ainda funcionando como forno solar, realizando o assamento de pizza e carnes. Esses tempos de cozimento n?o diferem muito dos tempos de cozimento em um fog?o ? g?s, fato que obt?m ao fog?o solar uma boa receptividade aos consumidores, al?m do mesmo n?o emitir gases que podem intoxicar os alimentos como no caso do fog?o a lenha. Comprova-se a viabilidade da utiliza??o do fog?o para cozinhar ou assar em duas refei??es di?rias para uma fam?lia, apresentando ainda condi??es de melhorar sua performance com adi??o de novos materiais, equipamentos e t?cnicas

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 worldwide was identified, and the concentrator design was then developed as a low-cost solar oven. Despite existing in some number, no current design is able to achieve high performance at low-cost. An industrial partner, Dytecna, was initially involved in the process of this development of the system as a solar cooker. In support of a field trial for the solar cooker developed with Dytecna, a detailed thermal model of the oven was developed. A low-cost lightmeter was constructed and calibrated in order to measure the direct normal irradiance during the field trial in Italy. Laboratory work provided baseline results for the heating of various thermal masses in the oven. The Italian field trials provided a wealth of feedback into the design of the system and many valuable results. The solar cooker was able to bring 0.75L of water to the boil in 33 minutes with an average heat throughput of 203W. Important benchmark results and practical experience of several competing receiver materials was obtained; further lab testing provided more accurate measurements of the receivers' performances. The experiences of the Italian field trial were fed back into the design of a subsequent prototype, intended for a much larger field trial in Tanzania. Improvements in the hotplate, receiver material, and the oven were all incorporated into the design. Additionally, the structure of the solar cooker was redesigned to incorporate a low-cost wooden construction. Supporting work was conducted for the month long trial in which 8 solar cookers would be distributed to families in Tanzania. The field trial in Tanzania provided a wealth of user feedback into the design. At the same time the new solar cooker exceeded previously established performances in Italy. The new design was able to provide an average of 246W of heat to 1kg of water, which was brought to boiling point in 25 minutes. This represents a heating efficiency of 66% compared to the incident solar flux on the hotplate. In response to findings during the Tanzanian trials, further laboratory work was conducted into establishing the reflectivities of low-cost candidate mirror materials. Throughout all phases of the project the design of the solar cooker was refined and improved with the goal of a solar cooker design that could reach price-point, performance, and usability standards which would ensure market success.

Made available in DSpace on 2014-12-17T14:57:55Z (GMT). No. of bitstreams: 1 jailtonWG.pdf: 3426096 bytes, checksum: a6ff181ad34e9b5be394de7ebee923b3 (MD5) Previous issue date: 2009-04-24 / An alternative box-type solar cooker built starting from the scrap of a tire and a scrap of old office chair is presented, which principles functions are the effect greenhouse and the concentration. The tire served as structure for making of is the baking enclosure where the absorber (roasting pan 20x30cm) of the solar is located, being re-covered for a glass blade for the generation of the greenhouse effect isolated lateral and having deep its and for a composite the plaster base and EPS. Segments of plain mirrors had been placed in the laterals of the oven/cook for the concentration of the radiation and a reflecting parable was introduced in the baking enclosure for the exploitation of the incident reflected radiation inside of the oven/cook. The oven/cook is mobile to allow one better aiming of exactly in relation to the apparent movement of the sun. The thermal economic and of materials viabilities of the stove/cook in study will be demonstrate. The average internal temperature of the absorber was around 152,3?C and the internal temperature around 110?C. Will demonstrate that toits low cost and good thermal performance, represents basic characteristics for the viability of large use of such archetype, mainly for cooking the decreases and averages temperatures. One will reveal that the archetype in study is competitive with the box-type solar cooker conceived in the whole world / Apresenta-se um forno/fog?o solar alternativo de baixo custo para ser utilizado nas opera??es de assar e cozinhar, que foi constru?do a partir de uma sucata de pneu. O pneu foi cortado na parte superior para aumentar a ?rea de capta??o da radia??o solar incidente. Utilizou- se comp?sito a base de gesso, EPS (poliestireno expandido) triturado e ?gua para revestir internamente a carca?a do pneu e o fundo da mesma para minimizar as perdas t?rmicas. Ser?o estudadas tr?s configura??es, onde ser?o utilizados dois tipos de par?bolas refletoras. Uma confeccionada a partir de uma tampa de prote??o de uma sucata de ventilador e outra a partir de uma urupema, peneira usada para comidas de milho. Acima da cobertura de vidro foi colocada uma estrutura com espelhos planos para refletir os raios incidentes para o interior do forno/fog?o solar. A estrutura de sustenta??o do forno/fog?o solar, com os movimentos necess?rios ao acompanhamento do movimento aparente do sol foi confeccionada utilizando uma sucata de cadeira girat?ria. O forno/fog?o solar proposto apresenta maior viabilidade para a opera??o de assar. Obteve-se uma temperatura m?xima no absorvedor em torno de 160? e interna em torno de 120?C. Demonstrar-se-? as viabilidades t?rmica, econ?mica e de materiais do forno/fog?o solar proposto

Made available in DSpace on 2014-12-17T14:58:25Z (GMT). No. of bitstreams: 1 RicardoFS_DISSERT.pdf: 1728822 bytes, checksum: b1de7d66ecdbf708be30f5dcf1f5d8fc (MD5) Previous issue date: 2014-07-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Presents a composite formed by orthophthalic resin and fiber loading of carnauba straw. The fibers were first dried in direct sun exposure and subsequently ground into fodder for the reduction in size. Various formulations of the composite were preliminarily tested by choosing the one presenting the best processability in applying the mold. The composite produced is used for the manufacture of a parabolic surface subsequently coated with mirror segments, flexible plastic, for reflecting the solar rays incident on it. The reflective parable represents the main element of the solar cooker that works with the concentration of sunlight and has dimensions of 1.14 m in diameter and area of 1.0 m?. Manufacturing processes and assembly of solar cooker concentration produced are presented. The results of tests for cooking and baking various foods, including rice, pasta, beans, cake, cassava, shrimp, beef, breaded demonstrating the competitiveness of solar cooker studied with other stoves already manufactured and tested in Brazil are presented and in the world. It was also demonstrated the feasibility of the proposed composite for Prototypes manufacture of solar and other structures that do not require great efforts resistance / Apresenta-se um comp?sito formado por resina ortoft?lica e carga de fibra da palha da carna?ba. As fibras foram inicialmente secadas em exposi??o direta ao sol e posteriormente trituradas em forrageira para a diminui??o do seu tamanho. V?rias formula??es do comp?sito foram preliminarmente ensaiados, escolhendo-se a que apresentava a melhor processabilidade na aplica??o ao molde. O comp?sito produzido ? utilizado para a fabrica??o de uma superf?cie parab?lica, posteriormente revestida com segmentos de espelho pl?stico, flex?vel, para a reflex?o dos raios solares nela incidentes. A par?bola refletora representa o principal elemento do fog?o solar que trabalha com a concentra??o dos raios solares e possui dimens?es de 1,14m de di?metro e ?rea de 1,0m?. S?o apresentados os processos de fabrica??o e montagem do fog?o solar ? concentra??o produzido. S?o apresentados os resultados dos ensaios para o cozimento e assamento de v?rios alimentos, dentre eles arroz, macarr?o, feij?o, bolo, macaxeira, camar?o, carne, empanados que demonstraram a competitividade do fog?o solar estudado com outros fog?es j? fabricados e ensaiados no Brasil e no mundo. Tamb?m foi comprovada a viabilidade do comp?sito proposto para a fabrica??o de prot?tipos solares e outras estruturas que n?o requerem resist?ncia a grandes esfor?os