0. Conclusions
Two PID based control systems have been tested to
control an orujo industrial dryer. Both of them have
shown a good performance and have improved the dryer
operation.
The dryers motor intensity and the difference between
outlet dry and wet temperature have been chosen
as main controlled variables in each system. These variables
are not the common ones, but both have proven to
be reliable and well related to dryer production. Anyway
the WC has turned out to be more robust and better related
to dryer production than DTC, and therefore, it
has been implanted definitively at the dryer.