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Previous issue date: 2008-06-09 === An cylinder-parabolic solar concentrator is presented to produce steam for different applications. This prototype was built in glass fiber with dimensions that follow a study of
optimization of parameters inherent in the optical reflection of sunlight by the surface of reflection and absorption of the same by tubing that leads the fluid of work. The surface of the
concentrator of 2.24 m? has been covered by layers of mirror with 1.0 m of lenght and 2.0 cm wide. The absorb tubing consists of a copper tube diameter equal to 28 mm. The concentrator is moving to follow the apparent motion of the sun. It will be presented the processes of manufacturing and assembly of the concentrator proposed, which has as main characteristics the facilities construction and assembly, in addition to reduced cost. Will be presented data from
tests performed to produce steam setting up some parameters that diagnose the efficiency of the concentrator. It will be demonstrated the viabilities thermal, economic and of materials of the proposed system.The maximum temperature achieved in the vacuum tube absorber was 232.1?C and average temperature for 1 hour interval was 171.5?C, obtained in a test with automation. The
maximum temperature achieved in the output of water was 197.7?C for a temperature of 200.0?C in the absorber tube. The best average result of the water exit temperature to interval of 1 hour was 170.2?C for a temperature of 171.2?C, in the absorber tube, obtained in test with automation.
Water exit mean temperatures were always above of the water steaming temperature. The concentrator present a useful efficiency of 38% and a production cost of approximately R$ 450,00 ( $ 160.34) === Apresenta-se um concentrador solar do tipo cilindro-parab?lico para a produ??o de vapor para aplica??es diversas. A superf?cie da par?bola foi constru?da em fibra de vidro, com
dimens?es que seguem um estudo de otimiza??o de par?metros ?pticos inerentes ? reflex?o dos raios solares pela superf?cie refletora e a intercepta??o desses raios pelo tubo absorvedor. A superf?cie do concentrador de 2,24 m2 foi recoberta por l?minas de espelho de 1,0 m de comprimento por 2 cm de largura. A tubula??o absorvedora ? composta de um tubo de cobre de di?metro correspondente a 28 mm. O concentrador tem mobilidade para rastrear automaticamente o movimento aparente do sol. Ser?o mostrados os processos de fabrica??o e montagem do concentrador proposto, que apresenta como caracter?sticas principais, as facilidades de constru??o e montagem, al?m de custo reduzido. A temperatura m?xima alcan?ada no tubo absorvedor vazio foi 232,1?C e a temperatura m?dia para intervalo de 1 hora foi 171,5 ?C, obtidas em um teste com automatiza??o. O pico m?ximo obtido na temperatura de sa?da de ?gua foi de 197,7?C para uma temperatura de 200,0?C no do tubo absorvedor. O melhor resultado m?dio da temperatura de sa?da da ?gua para intervalo de 1 hora foi 170,2?C para uma temperatura de 171,2?C, no tubo absorvedor, obtido em teste com automatiza??o. As m?dias de temperaturas de sa?da de ?gua estiveram sempre acima da temperatura de vaporiza??o da ?gua. O concentrador apresenta uma efici?ncia ?til de 38% e um custo de fabrica??o de aproximadamente R$ 450,00 ( $ 160,34)
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