Rotary heat exchanger - REGOTERM -
TURBOTERM - EURA
Fläkt Woods 4370 GB 06.10 1 Specifications are subject to alteration without notice
EU Air Handling Unit CATALOGUE
Rotary heat exchangers are used for recovering and trans-
ferring heat or cooling energy and possibly moisture from
the extract air to the supply air. The REGOTERM, TUR-
BOTERM system is particularly well suited for air hand-
ling systems in which high temperature and moisture effi-
ciencies are required.
Material: Galvanized or stainless sheet steel
Rotor: Aluminium
Rotor type: one-piece/sectorized design
Non-hygroscopic/hygroscopic
Reinforced edges, with/without
Foil spacing: standard/wider
Temperature efficiency for TUBOTERM is 5,5 % higher
than for REGOTERM.
Max working temperature 50 °C
Sizes:
Leakage
The heat recovery is equipped with a purging sector; which
prevents carry-over of extract air to the supply air side as
the rotor rotates.
Carry-over at the rotor seals can be prevented by creating a
slight positive pressure differential between the supply air
and extract air sides (p2>p3).
This pressure differential, which should be slight in order
to minimize leakage air flow rate, can be achieved by arran-
ging the fans as shown in the figure below and, if necessary,
by installing a pressure-adjusting damper in the extract air
duct.
Normal values of leakage air flow are at the seals 1–4 % of
the total air flow rate.
20, 21, 22
30, 31, 32, 33
40, 41, 42, 44
These sizes are delivered complete. A split rotor
can be delivered in the size 30–44 units however
then in a one-piece casing only.
50, 51, 52, 53
60, 62, 64
71, 73
80, 82, 84
These sizes are always delivered in the split version
for assembly at site, i.e. sectorized rotor and
split casing.
Room
Trimspjäll
P1
P2
Pressure adjusting
damper, if required
Room
This arrangement makes it easy to achieve pressure conditions; which provi-
des leakage from the supply air to the extract air.
P3
P2
Risk of frosting
In normal comfort ventilation, the need for defrosting nor-
mally arises at an outdoor temperature of approximately
–15 °C if the unit has a non-hygroscopic rotor, and at
approximately –25 °C if it has a hygroscopic rotor.
If the extract air relative humidity is more than 40% and if
the supply air temperature is below –8 °C get in touch
with Fläkt Woods technical support.
Control
Variable speed
The efficiency of the heat recovery unit, and thus the supp-
ly air temperature downstream of the rotor, are controlled
by varying the rotor speed.
The control equipment consists of: Speed controller and a
control unit, by means of which the rotor speed can be
varied between 0 and 15 r/min. The speed controller is fac-
tory fitted and ready-wired as standard.
Motor data
Power supply 1 x 220 – 240 V; 50–60 Hz
Rotary heat exchanger - REGOTERM -
TURBOTERM - EURA
Fläkt Woods 4370 GB 06.10 2 Specifications are subject to alteration without notice
EU Air Handling Unit CATALOGUE
Design
The rotor consists of alternate flat and corrugated strips of
aluminium foil, which form a large number of axial passa-
ges, through which the air flows in a laminar pattern. As a
result, the pressure drop across the rotor is very low.
The centre of the rotor consists of a hub with shaft and
bearings.
The rotor is bolted to two centre beams in such a manner
that it can be dismantled at the mountings and be removed
on the centre beams for maintenance and cleaning.
An effective seal is provided in the gap between the rotor
and casing to minimize the leakage between the outdoor
air and extract air.
The drive unit consists of a constant-speed or variable-
speed electric motor. The rotor is driven by a belt drive.
All four connection openings of the heat exchanger must
be accessible for connection to other unit blocks.
Both upper openings of the rotary heat exchanger must be
accessible for rotor service, etc.
For transport reasons, sizes 50 – 84 are delivered in two
halves for assembly on site.
Installation: For horizontal air flow only.
Size Rated output,
W
Voltage
V
Rated current,
A
20 – 32
40 – 53
60 – 84
60
250
750
3 x 230 VD
3 x 400 VY
3 x 230 VD
3 x 400 VY
3 x 230 VD
3 x 400 VY
0.87
0.5
1.4
0.8
3.3
1.9
1) Speed controller incl. Motor
Constant speed
Heat exchanger with drive motor are included in the supply.
Motor data
Size Rated output,
W
Rated current,
A 1)
20 – 31
32 – 44
50 – 60
62 – 84
40
100
160
750
0,7
1,3
1,7
7,2
Drive system
EMX-R 15
EMX-R 25
EMX-R 35
EMS-VVX 6
Rotary heat exchanger - REGOTERM -
TURBOTERM - EURA
Temperature efficiency
Chart 1
Fläkt Woods 4370 GB 06.10 3 Specifications are subject to alteration without notice
EU Air Handling Unit CATALOGUE
85
53
80
75
70
0,5 1 2 3 5 10
ηt (%)
Air flow rate m3/s
50 60 70 80 90 9514
Supply air/exhaust air flow rate
Temperature efficiency ηt. %
0,81,01,21,4q2/q3
0,6
Storlek 20,21
22
32,33
30,31
40,41
50,51,52
42,44
90
85
80
75
55 65 75 85 95 100 REGOTERM
TURBOTERM
REGOTERM
ηt (%) TURBOTERM
Temperature- and moisture efficiency
Chart 2
Air flow rate m3/s Temperature efficiency ηt, %
Supply air/extract air flow rate
Size 20, 21
Efficiency η, %
% of max. speed
0 102030405060708090100
0
20
40
60
80
100
Hygroscopic rotor
ηx
ηt
Hygroscopic rotor
% of max. speed
Efficiency ηt, %
= Temperature efficiency
= Moisture efficiency
/