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| Tinôco,Ilda de F. F.; Figueiredo,José L. A.; Santos,Rodrigo C.; Paulo,Marcos O. de; Vigoderis,Ricardo B.; Pugliesi,Nelson L.. |
| Objetivou-se, com este trabalho, a comparação entre a eficiência de alguns materiais porosos alternativos encontrados no Brasil: cinasita (argila expandida), serragem, fibra vegetal e carvão, para o Sistema de Resfriamento Adiabático Evaporativo (SRAE). O experimento se deu em condições de verão, em estufas situadas na Universidade Federal de Viçosa, Minas Gerais. O conforto térmico ambiente foi avaliado através do Índice de Temperatura de Globo Negro e Umidade (ITGU) e Umidade Relativa do ar (UR), medidos diariamente, a cada duas horas, das 8 às 18 h. Os resultados obtidos foram interpretados através da análise de variância. Com base neste estudo, é possível inferir que a confecção de placas porosas para resfriadores evaporativos, utilizando-se os... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Resfriamento adiabático evaporativo; Materiais porosos; Conforto térmico. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662002000100026 |
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| Coradi,Paulo C.; Martins,Márcio A.; da Costa,Douglas R.; Vigoderis,Ricardo B.; Tinôco,Ilda de F. F.. |
| ABSTRACT Animal welfare is essential for livestock yield gains, which has been ethically justifiable and socially acceptable. Thus, our research aimed to test computational fluid dynamics model (CFD) to simulate heated air within a poultry barn. Data were simulated in CFD software based on Navier-Stokes equations (geometry of 3 m x 6 m, considering a symmetric mesh). As boundary conditions, a temperature of 38ºC was considered for walls where heating pipe outlets are, to the west side, besides a heat flow of zero, in symmetry to the same side. As for the sides east, south and north, walls were taken as isolated, i.e. heat flow equals to zero. The aviary heating system did not achieve a homogeneous temperature distribution, heat flow, heated air pressure... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Animals; Thermal comfort; Airflow. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500768 |
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| Silva,Roberto C. da; Cordeiro Júnior,José J. F.; Pandorfi,Héliton; Vigoderis,Ricardo B.; Guiselini,Cristiane. |
| ABSTRACT Computational simulations of mass and energy flow help in implementing alternative cooling systems in protected environments. The aim of this study was to model and simulate the interaction between external and internal environments of a protected environment by means of computational fluid dynamics (CFD) techniques and validate micrometeorological variables for subsequent comparison between natural and indirect ventilation by ground heat exchangers. At the first phase, the micrometeorological variables global solar radiation (Qg), air temperature (Tair), and air relative humidity (RH) were monitored. The second phase consisted of the numerical modeling of finite volumes, with validation through recorded data, as well as simulation and comparison... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Numerical simulation; Micrometeorology; Protected cultivation; Finite elements. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300414 |
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