© Munters AB, 2020 26
5
Introduction to Ventilation
Defining Munters’ Trio ventilation consists of three elements:
•
Defining the Minimum and Maximum Ventilation: Defining the minimum and
maximum ventilation defines how much air is required for any given growth day.
Based on these requirements, Trio determines which fans run.
•
Defining the Fans/Ventilation Scheme: Defining the fans/ventilation determines
how much air the fans provide and which fans provide the air.
•
In addition, Trio controls the inlets and tunnel doors. There are two ways to control
the inlets and tunnel doors:
o
Static pressure: Based on the difference in the interior and exterior air
pressures, Trio continually calculates the inlets’/doors’ opening positions.
When inlets/doors change to another level, they do so before the fans
increase/decrease to that level. Note that Trio uses the positions assigned to
the inlets/tunnel doors levels as the minimum position.
o
Position control: The user can define the opening positions of the inlets,
outlets, and tunnel doors by level. Note that when inlets/doors change to
another level, they do so before the fans increase/decrease to that level.
•
Inlet control is fully explained in Inlet and Curtain Ventilation, page 46.
5.1
Defining the Minimum and Maximum Ventilation
In setting up the Climate > Min/Max Ventilation screen, the user defines the lower and
upper ventilation limits during the growth cycle: the minimum and maximum amount of air
exchange allowed for each growth day.
•
When minimum ventilation is operating, the ventilation works to ensure that there
is sufficient clean air while keeping the air temperature close to the target
temperature.
•
The maximum limit ensures that the birds/animals do not receive too much air
during any particular growth stage.
•
If the temperature is above the target temperature by a sufficient amount, the
ventilation level increases. If the increase in ventilation does not reduce the
temperature, ventilation increases until it reaches the maximum amount defined
for that growth day.
•
If the temperature decreases to a user-defined point, heaters can turn on. At this
temperature, ventilation will be at the minimum level.
Options:
•
Day curve only.
•
Dynamic Ventilation: This option enables increasing or decreasing the
minimum/maximum ventilation based on the outside temperature.
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