© Corroventa Ltd.
2017.02
7 (25)
Drying methods
The turbine CTR T ES is, in combination with adsorption dryer, used for suction and pressure drying.
The reason for the use of an adsorption dryer is that both suction and pressure drying are all about
drying material and the speed of that process is dependant of the difference in water contents (
Δ
x),
measured in grams per kilogram, between the material and its environment. Adsorption dryers
produce dryer air, generates a greater reduction of water contents measured in grams per kilogram)
which increases the speed of the drying process. With pressure drying, warm and dry air is pressed
down into the construction making the construction temperature rise which increases the speed even
further and is the reason for it being faster than suction drying.
Suction drying
For suction drying the turbine is installed so that
it draws air from the construction through hose,
water separator and filter and then evacuates
this, normally outdoors. Use of water separator is
critical to prevent water from being sucked into
the turbine and damage its motor.
The dryer is installed for normal drying of room.
Pressure drying
For pressure drying, the turbine is installed so that
it is fed with dry air from the dryer and then presses
this down into the construction. This makes the
construction temperature rise and the drying goes
faster. Wet and cooled air leaks into the room
through drilled holes or gaps between the floor and
the walls and then returns to the dryer as process
air.
Before pressure drying is applied, suction drying
shall be used to remove any free water from the
construction and thus avoid pushing this into other
parts of the building. The initial removal of free
water also saves time.
Pressure drying might free particles/fibers from the construction and thus release them in the air. If
this is a potential problem, another method should be applied.
Pressure drying. The turbine is fed with dry air from the
dehumidifier and presses this air into the layered
construction.
Suction drying. The dryer dries the ambient air and the turbine
draws and evacuates air from the construction. The resulting
underpressure in the construction draws dry air into it.
