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      Evaluation of a Heating System in Poultry Houses Using a CFD Model Translated title: Evaluación de un Sistema de Calefacción en Galpones Avícolas Usando un Modelo en DFC

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          Abstract

          The objective of this study was to adapt and validate a computer model using the Computational Fluid Dinamics (CFD), in the prediction of temperature and air speed in a duct distribution system coupled to a heating furnace that is used in typical poultry houses in tropical and subtropical countries. The validation of the model with experimental data was satisfactory, presenting normalized mean square error NMSE values of 0.25 and 0.02 for air temperature and air speed, respectively. The results evidenced that the proposed model is adequate for predicting the air speed and temperature for this type of system, and could be used to improve the efficiency of the distribution of heat inside and around air ducts using different air speeds, types of materials and dimensions.

          Translated abstract

          El objetivo de este estudio fue adaptar y validar un modelo computacional haciendo uso de la dinámica de fluidos computacional (DFC) para predecir la temperatura y la velocidad del aire en un sistema de distribución de ductos acoplado a un sitema de calefacción que es utilizado en las instalaciones avícola en los países tropicales y subtropicales. La validación del modelo con los datos experimentales fue satisfactoria, presentando valores medios normalizados del error cuadrado NMSE de 0,25 y 0,02 para la temperatura y velocidad del aire respectivamente. Los resultados muestran que el modelo propuesto es adecuado para predecir la velocidad del aire y la temperatura alrededor de este tipo de sistema, y podría ser utilizado para mejorar la eficiencia la distribución de calor en el interior y alrededor de los conductos, usando diferentes velocidades, tipos de materiales y dimensiones.

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          Applications of computational fluid dynamics (CFD) in the modelling and design of ventilation systems in the agricultural industry: a review.

          The application of computational fluid dynamics (CFD) in the agricultural industry is becoming ever more important. Over the years, the versatility, accuracy and user-friendliness offered by CFD has led to its increased take-up by the agricultural engineering community. Now CFD is regularly employed to solve environmental problems of greenhouses and animal production facilities. However, due to a combination of increased computer efficacy and advanced numerical techniques, the realism of these simulations has only been enhanced in recent years. This study provides a state-of-the-art review of CFD, its current applications in the design of ventilation systems for agricultural production systems, and the outstanding challenging issues that confront CFD modellers. The current status of greenhouse CFD modelling was found to be at a higher standard than that of animal housing, owing to the incorporation of user-defined routines that simulate crop biological responses as a function of local environmental conditions. Nevertheless, the most recent animal housing simulations have addressed this issue and in turn have become more physically realistic.
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            Avaliação do bem-estar de frangos de corte em dois galpões comerciais climatizados

            Objetivou-se, com esta pesquisa, avaliar as condições do ambiente interno em dois galpões comerciais de frangos de corte equipados com dois sistemas de resfriamento diferentes: placas porosas umedecidas de celulose associadas à nebulização (SRPN) e placas umedecidas de sombrite associadas à nebulização (SRSN). Nos galpões estudados, situados em Itaberaí, GO, foram avaliadas quatro variáveis térmicas (temperatura, índice de temperatura de globo negro e umidade, carga térmica de radiação e entalpia), três respostas fisiológicas (temperaturas retal e da pele, e frequência respiratória) e três índices de desempenho produtivo (ganho de peso, consumo de ração e conversão alimentar) das aves. Os resultados indicaram que os sistemas avaliados não foram suficientemente adequados para promover condições de conforto às aves, não sendo observada diferença estatística significativa entre o desempenho das aves neles alojados. A taxa de mortalidade no galpão SRSN foi 15% maior em relação ao galpão SRPN, porém, ambas são inferiores àquelas sugeridas para as aves em estudo.
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              Evaluation of cfd accuracy for the ventilation study of a naturally ventilated broiler house

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rfnam
                Revista Facultad Nacional de Agronomía, Medellín
                Rev.Fac.Nal.Agr.Medellín
                Facultad de Ciencias Agropecuarias - Universidad Nacional de Colombia, Sede Medellín (Medellín )
                0304-2847
                June 2014
                : 67
                : 2
                : 7311-7319
                Affiliations
                [1 ] Universidade Federal de Mato Grosso Brazil
                [2 ] Universidad Nacional de Colombia - Sede Medellín Colombia
                [3 ] Universidade Federal de Viçosa Brasil
                [4 ] Universidade de Brasília Brazil
                [5 ] Universidade Federal de Viçosa Brasil
                Article
                S0304-28472014000200007
                10.15446/rfnam.v67n2.44178
                3519c323-ecff-47d1-96cb-4d4e51a0600e

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Colombia

                Self URI (journal page): http://www.scielo.org.co/scielo.php?script=sci_serial&pid=0304-2847&lng=en
                Categories
                AGRONOMY

                Horticulture
                Animal welfare,energy efficiency,aviculture,Bienestar animal,eficiencia energética,avicultura

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