Special industrial fan application: Wind Turbines -- How does the energy supply of the future look? Power generation by wind turbines is increasingly in the focus of the electricity-supplying companies due to energy transition measures adopted by the German Federal Government. An important part of a wind turbine is the protection of the individual components from overheating. No matter whether nacelle ventilation, generator cooling, switch cabinet ventilation, tower air cooling or inverter and transformer cooling - our fans are suitable for every demand in the wind turbine area. Through long years of know-how, these fans are designed for the highest technical demands. We offer flexible solutions for: optimum airflow minimal maintenance optimized noise behaviour a wide range of operating voltages (at 50/60 Hz) maximum efficiency at variable speeds trouble-free operation even under vibration and voltage peaks space-saving installation through direct-drives with external rotor motors The wide performance range for wind turbines Nacelle ventilation The nacelle of a wind turbine is home to many high-tech components that give off heat to the environment. Removal of this heat is absolutely necessary for trouble-free operation of the system. Our fans in the DRA, AND and DQ/DR series, for example, can do this. Generator cooling Kinetic energy is converted into electrical energy in the generator. Loss of heat occurs during this conversion. This heat must be diverted to protect the generator from overheating. Our fans in the DRA series are ideally suited for this task. Switch cabinet ventilation Switch cabinets are essential for perfectly coordinating the components of a wind turbine. Here, too, sufficient heat dissipation is required to protect sensitive electrical components from overheating. Our free running impellers in various designs, as well as fans in the ERA series, have been specifically designed for this application. Tower air cooling Wind turbine tower cooling is only possible with large volume flows. For this reason, various axial fans, as well as free-running impellers with standard motors in the DKNM/DKNB/DKNR series are used here. Inverter and transformer cooling The cooling of other electronic components, such as converters or transformers, is also no problem for our individually designed fans. It does not matter whether the cooling is to be done in the nacelle or at the base of a wind turbine.

1. FANS FOR WIND TURBINES
www.rosenberg-gmbh.com

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The Rosenberg Group
Air conditioning and ventilation technology
is our world
Air is our element – moving it intelligently and efficiently
is our passion.
Since 1981 we have been developing and producing adjustable
external rotor motors, fans and air handling units.
Established 1981
Employees 350 in Germany
Approx. 1,400 worldwide
Production sites Germany, Hungary, Czech Republic,
Italy, France, China, Slovakia
Development centres Germany, France,
(certified laboratory) Hungary and China
Subsidiaries ROX Klimatechnik GmbH,
and Partners ECOFIT, ETRI, Airtècnics

3. 3
Fans for wind
turbines
Cooling the generator
The generator is the heart of the wind turbine.
During the process of converting kinetic energy to electrical
energy, heat is generated.
Rosenberg Fans, as part of cooling systems, ensure the needed
cooling load, safe life time and efficiency of the generator. Fan
type DRA… and AKS… are ideally suited to this task.
Inverter cooling
To ensure that the generated current can be injected into the
grid at a constant voltage and frequency, inverters are needed.
For cooling the sensitive electronic components individually
designed Rosenberg fans are used.
Transformers
Heat generated in the winding of dry transformers must be
dissipated over the surface of the coil.
Rosenberg fans help to extract the dissipated heat and
simultaneously use the ambient air to cool down the
transformer.
The following advantages result from efficient cooling:
• Higher peak loads can be achieved
• Improved efficiency
• Increase the power of the transformer
• Longer life due to the constant distribution of temperature

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Examples of applications
Wind turbines
FANS

5. 5
Nacelle cooling
Generator cooling
Tower cooling
Inverter cooling
Ventilation of the switching cabinets
Transformer cooling
Examples of applications
Wind turbines
FANS
DQ DHA
DRA AKF
DKNRDKNM DKHM
DKHM
ERA
AND
GKHM
AND
DHA
DKNB
DV
DKHM ERAGKHM
GKHM
ERA

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Industry-specific solutions
Fans for wind turbines
Axial fans type: AND/ANDB/DR/DQ
• AND/ANDB Axial fans with standard driven motor and adjustable
blades made of diecast aluminium.
(Air volumes up to 80.000 m³/h, pressures up to 1.000 Pa)
• DQ/DR/AKF compact, noise optimized axial fans with external
rotor motor and air volumes up to 30.000 m³/h
Application field:
Ideal suited for moving high air volumes for example in tower
or nacelle cooling
DQ...
Centrifugal fans type: DRA / DHA
• Double inlet centrifugal fan with forward curved impeller blades
(Type: DRA)
• Double inlet centrifugal fan with backward curved impeller blades
(Type: DHA)
• Variable mounting positions possible
• Air volume up to: 28.000 m³/h
• Total pressure: 1.100 Pa
Application field:
Generator cooling, nacelle cooling
Centrifugal fans with Free running impeller type: DKNB /
DKNM / DKNR
• Free running impeller with IEC standard motor (DKNB)
• Impeller with backward curved blades
• Motor with impeller (DKNR) or ready-to-install module
• Ideal for confined spaces due to its space saving construction
• Air volume up to: 35.000 m³/h
• Total pressure: 2.800 Pa
Application field:
Ventilation of the switching cabinets, tower cooling
DRA...
AKF...AKF
DKNR
DKNB
DHAE...
DKNM
DKNB
DKNR
AND...

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Industry-specific solutions
Fans for wind turbines
Centrifugal fans with free running impeller type:
DKHM / GKHM
• With AC-external rotor motor, alternatively with EC-motor
• Backward curved impeller
• Motor with impeller (GKHR / DKHR) or ready-to-install module
(GKHM / DKHM)
• Ideal for confined spaces due to its space saving construction
• Air volume up to: 15.000 m³/h und total pressure: 1.400 Pa
Application field:
Ventilation of the switching cabinets, tower cooling
ERA...
GKHMGKHM
ERA
DKHM
Centrifugal fans type: ERA
• Single inlet centrifugal fan with forward curved impeller
• Variable mounting positions possible
• Air volume up to: 8.000 m³/h
• Total pressure: 1.000 Pa
Application field:
Ventilation of the switching cabinets, transformer and inverter
cooling
Roof fans type: DV
• Vertical version
• Impeller with backward curved blades
• Air volume up to: 18.000 m³/h
• Total pressure: 1.200 Pa
Application field:
Transformer and inverter cooling
DV

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Compressor cooling
Knowledge and experience - Rosenberg has been active in the
compressor cooling sector for many years. Due to the close
cooperation with well-known manufacturers, numerous fans
have already been adapted to the needs of the industry.
Other sales sectors /
Industries
Railroad technology
Rosenberg is one of the world’s leading brands in railway
technology.
Rosenberg OEM Products are not only installed to air-
condition driver‘s cabins and passenger compartments but
also to cool switchboards, drive inverters and many other
components.
Transformer cooling
Efficient cooling plays an important role in the lifetime and con-
stantly high operation safety of transformers. Customized fans
assume this task for many years and are characterized by reli-
ability and high quality.

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Other sales sectors /
Industries
Data Centers
Protecting data centers from overheating and humidity is one of
the main tasks of fans within this application. Rosenberg OEM
products with AC or EC drive guarantee a smooth and failsafe
operation of the computer systems in an efficient manner.
Marine
Cruise Ships have a wide range of ventilation needs.
Rosenberg OEM Products offer solutions for exhaust ventilati-
on of elevators, restrooms, laundries or battery compartments
as well as solutions for the use in HVAC applications dedicated
to yachts and cruise ships cabins.
Packaging Industry
In highly complex packaging processes, it is essential to pre-
vent a failure of the entire system. Therefore Rosenberg OEM
products are used for cooling to ensure a trouble-free opera-
tion of various machines in industrial packaging processes.

10. 10
Patrick Dörr
07940 / 142 214
Patrick.Doerr@rosenberg-gmbh.com
Maybachstr. 1/9, D-74653
Künzelsau-Gaisbach
Felix Riedling
07940 / 142 266
Felix.Riedling@rosenberg-gmbh.com
Maybachstr. 1/9, D-74653
Künzelsau-Gaisbach
FANS
Rosenberg –
Subsidiaries and Partners
Since its foundation in 1981 by Karl Rosenberg the Rosenberg
Ventilatoren GmbH has emerged through its development
and production of adjustable external rotor motors, fans,
air handling units and control technology as an important cen-
ter for Europe for the ventilation and air conditioning industry in
Europe.
Customer-oriented and high-quality production is our top prio-
rity. The continuous information flow and a good cooperation
between customers and our employees is very important to
us to ensure quality and product inovation. Modern perfor-
mance testing, computer-controlled production machines
and self-directed work groups are also included as well as the
integration of measures for higher quality and environment
protection.
At the headquarters in Künzelsau, Rosenberg employ 240
members of staff, with over 1.400 employees worldwide.
Further Rosenberg production plants are located in Glaubitz
(Germany), Waldmünchen (Germany), Hungary, Czech Repub-
lic, Italy, France, Slovakia, Turkey, Mexico and in China.
You can find more information on:
www.rosenberg-gmbh.com
Your contact persons:

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• Ø 450-800 mm
• With robust asynchronous external rotor motor
• Compact, space saving design
• Double flange casing made of galvanized sheet steel
with special powder-coating according to DIN EN ISO12944
( Optionally up to C5M )
• Aluminium terminal box (optionally coated)
• Fan guard with high quality surface treatment
(Cathodic dip painting + powder coating)
• Pressure-side flange with mounting holes for easy installation
• Exhaust side fan guard available as an option
AXIAL FANS
Product information:
for transformer cooling
Fans with AC-motors
Type: AKFD
new
)
s for easy installation
ption

12. Rosenberg Ventilatoren GmbH
Maybachstr. 1/9
74653 Künzelsau-Gaisbach
Germany
Fon. +49 (0)7940 / 142-0
Fax. +49 (0)7940 / 142-125
www.rosenberg-gmbh.com
info@rosenberg-gmbh.com
(C)RosenbergVentilatorenGmbH•Version:02/2019