Desarrollo de un modelo matemático para la evaluación de los parámetros de operación de las naves en la cría de pollos de engorde

Abstract

This work has been developed to study some of the effects that occur on broiler housing technology transition from natural ventilation to tunnel ventilation, in order to overcome climate impact on mass production. Air speed is the main parameter on keeping temperature lower enough to avoid chicken heat stress and dead. Due to holes and other uncontrolled air entrances, air speed drops along the broiler house. A mathematical derivation is been done to compute air speed considering a linear structural equivalent gap. This feature takes in account all unknown air entrances. The equivalent gap is used in a nonlinear mathematical model to compute the air temperature at the extractor fans which is based on the model proposed by V.F. Carvalho et all 2008 [34] whom adapted from the one develop by Louis D. Albright in his book “Environment Control for Animals and Plants”. The nonlinear model computes with MatLab each n-control volume through the velocity equation developed with the equivalent gap. Excel tools such as “Solver” had been used to determine the equation constants of the velocity expression by fitting to experimental data.. An ANSYS 2D model has been develop and validated to compare acquired data to explain some unusual air speed drops and whirlwinds. The 2D model also has shown important exponential air speed fall reducing evaporative wall efficiency.