Bedienungsanleitung Trotec TTR 500 D (Seite 4 von 20) (Englisch)

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User instructions – Adsorption dehumidiﬁer TTR 400/400D/500D

Functional principle

TTR 400D/500D

Adsorption dehumidifiers work with a drying wheel (rotor) consisting of

layers of flat and corrugated fibres with a chemically bound silica gel.

This generates a honeycomb structure with numerous axial air channels

with a large surface and direct connections to the inner pore structure of

the silica gel.

Due to the favourable mechanic and physical properties of the drying wheel,

no silica gel is released and can be subject to saturated air (100 % rh),

however, not to drips of water. It is not flammable.

The basic design of a dehumidification unit is as follows:

• Fan(s) for air delivery

• At least two different sections for delivery of process air (to be dehu-

midified) and regeneration air (humid exhaust).

• Drying wheel for dehumidification

• Drive unit with gear motor, toothed belt disc and toothed belt

• Heating unit for heating of the regeneration air

During dehumidification, the drying wheel continuously turns at low

speed (3 to 30 rpm, depending on the configuration). This way, process

air and regeneration air are simultaneously applied to the drying wheel

via the sections so that it can permanently absorb and release humidity.

Process air

Air to be dehumidified is taken in by means of a fan. The process air (4)

flows through the dehumidification section (1) of the drying wheel. In this

process, the humidity in the air is removed by means of the absorbent

(silica gel) and bound (adsorption). Due to physical processes, the tem-

perature of the drying air is increased. In the further process, the dried air

(6) is delivered to the drying air outlet.

Regeneration air

Regeneration air is also taken in by means of a fan and passes through

the rinsing sector (3). During humidification, the drying wheel is heated

by the released heat of adsorption and regeneration. The rinsing sec-

tor is used for heat recovery and to cool the drying wheel which results

in reduced energy input and improved dehumidification performance, in

particular for lower dew points.

When flowing through the heating unit (7), the temperature of the air is

increased to approx. 100 - 120 °C (depending on the intake temperature),

while its relative humidity is considerably reduced.

Afterwards, the air that was prepared in this process absorbs the humid-

ity bound in the silica gel (desorption) when passing the regeneration

section (2). Afterwards, the extremely humid regeneration air (8) is deliv-

ered outside through the humid air outlet.

Fig.: Functional principle TTR 400D/500D

TTR 400

Process air

Air to be dehumidified is taken in by means of a fan and divided into two

air streams: Process air (4) and regeneration air (5).

The process air (4) flows through the dehumidification section (1) of the

drying wheel. In this process, the humidity in the air is removed by means

of the absorbent (silica gel) and bound (adsorption).

After having passed the section, dry air (6) is released into the space.

Regeneration air

The second air stream (5) is passed through the rinsing section as regen-

eration air. This section is used for the recovery of the heat of adsorption

generated during dehumidification.

At the same time, the drying wheel is cooled which results in reduced

energy input and improved dehumidification performance, in particular

for lower dew points.

Further on, the air stream is passed through a heating unit (7), the tem-

perature of the air is increased to approx. 100 - 120 °C (depending on the

intake temperature), while its relative humidity is considerably reduced.

Afterwards, the air that was prepared in this process absorbs the humid-

ity bound in the silica gel (desorption) when passing the regeneration

section (2). Afterwards, the extremely humid regeneration air (8) is deliv-

ered outside through the humid air outlet.

Fig.: Functional principle TTR 400

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