Fläkt Woods
3099 US 03.02
3
Specifications are subject to alteration without notice
PUMA (A–F) Rotary heat exchanger
TECHNICAL HANDBOOK
Design
The ECONOVENT unit is a regenerative heat
exchanger comprising a rotor which transfers heat and
moisture from the exhaust air to the supply air as it
rotates.
The supply air flows through one half of the heat
exchanger, and the exhaust air flows in counterflow
through the other half. Supply air and exhaust air thus
flow alternately through small passages in the rotor in
opposite directions.
Most important benefits:
Reduced heat demand which, in turn, reduces the size
and thus also the investment cost for the boiler station
or the connection charge for tariff-linked heat, such as
electric power and heat from the district heating system.
In addition, the sizes and thus the investment costs for
air heaters, pipes and pumps are reduced.
Reduced heat energy demand, which reduces the
operating costs, i.e. the oil consumption or the con-
umption charge for electrical energy or heat from the
district heating system.
Reduced energy consumption for humidification
(hygroscopic rotors) of the air, since moisture is also
recovered.
Reduced cooling power demand (hygroscopic rotors)
which reduces the size and thus also the investment
cost for the refrigeration system (compressor, cooling
tower, etc.), air coolers, pumps and pipes.
Reduced energy consumption for refrigeration
(hygroscopic rotors).
General reduction in environmental pollutants.
ECONOVENT is a complete product range of rotary
heat exchangers for air handling systems in various types
of environments and plants. ECONOVENT is available
with six different materials for the rotor, and the right
material can therefore always be specified to suit most
environments.
2000
3000
4000 5000
10 000
20 000
30 000
50 000
Air flow, m
3
/h
Air flow, m
3
/s
100 000
150 000
0.4
0.5
1
2
3
4
5
10
20
30
40
50
0.3
0.2
Air flow, CFM
500
1000
2000
3000
4000 5000
10 000
20 000
30 000
50 000
100 000
060
080
095
110
135
150
170
190
200
215
240
265
290
320
350
380
420
460
500
120
Size
Air velocity 400 FTM
Air velocity 900 FTM
FPM
FPM
