Published

2014-07-01

Association Between Conformation Traits and Reproductive Traits in Holstein Cows in the Department of Antioquia - Colombia

Asociación entre Características de Conformación y Reproductivas en Vacas Holstein del Departamento de Antioquia - Colombia

DOI:

https://doi.org/10.15446/rfnam.v67n2.44174

Keywords:

Genetic parameters, linear type traits, phenotypic correlation, reproductive efficiency. (en)
Parámetros genéticos, características lineales, correlación fenotípica, eficiencia reproductiva. (es)

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Authors

  • Stephania Madrid Gaviria Universidad Nacional de Colombia – Facultad de Ciencias Agrarias – Departamento de Producción Animal - Grupo BIOGEM
  • José Julián Echeverri Zuluaga Universidad Nacional de Colombia - Sede Medellín – Facultad de Ciencias Agrarias – Departamento de Producción Animal

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.

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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References

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