Vol 7, No 7 (2016) > Mechanical Engineering >

Mathematical Model and Simulation Study of a Closed-poultry House Environment

Teerapon Upachaban, Kannika Khongsatit, Thana Radpukdee


Abstract: The temperature and
humidity inside poultry houses are highly coupled through nonlinear
psychrometric processes, and the limitation of actuators makes this type of
system difficult to control. To understand the dynamics of such systems and further to design
a suitable controller, in this study, the mathematical model for a
closed poultry house was derived from the governing equations of the various
components related to the poultry house, including the energy and mass balance
and the psychrometric correlations of the moist air. The model was simulated
and the simulation result was compared to the data collected experimentally for
model verification and control gains estimation. Under the assumptions of 70
percent Active Mixing Volume (AMV) with the constant maximum ventilation rate
in the
case study, the temperature and the relative humidity simulated results were in
the good agreement with the real physical plant data.  At the front, the middle and the rear part of
the poultry house, the root-mean-square error (RMSE) obtained for internal temperatures are
1.17oC, 0.68oC, and 0.46oC, respectively. And
those data
for relative humidity are 4.31%, 8.07%, and 53.54%, respectively.
Keywords: Broiler house environment; Livestock building; Poultry house model; Temperature control; Tunnel ventilation

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