The model presented in this article represents well the complexity
of the temperature dynamics observed in a wine fermentation
tank, aspect not considered by previous models. For example,
simulated maximum temperatures differences were similar to
those recorded in an experimental tank. When fermentations were
simulated without a cooling system, excessive temperatures were
obtained. Additionally, when low initial concentrations of nitrogen
were used, sluggish fermentations were predicted, as would be expected
in a real wine fermentation with deficient nitrogen
concentrations.
The model can be easily adapted to design and assess control
strategies to avoid extreme temperatures in large wine fermentation
tanks, where temperature gradients are more significant.
Our future efforts will be directed in designing such control
strategies.