PR O WB OE TR I CS YS S T E M S
MAXIMUM ENERGY SAVINGS
WITH KAESER’S NEXT GENERATION CSD(X) SERIES
Kaeser Compressors
has launched its next
generation CSD(X)
series of variable
speed rotary screw compressors
which are paving the way for the
highest current efficiency gain, and
thus reduced energy costs, when
using variable-speed compressors.
As a leading compressed air
systems provider and a renowned
industry trendsetter, the familyowned
company proudly presented
yet another technological milestone
some time ago: the introduction of
synchronous reluctance motors
for its SFC variable-speed screw
compressors. After the ASD
series, the CSD and CSDX series
are the next to be equipped with
this technology. This means
significantly lower energy costs for
end users, particularly in the crucial
partial-load range, compared
to the previous solution with
asynchronous motors.
With the Sigma Profile and
innovative drive concepts, Kaeser's
rotary screw compressors
already deliver outstanding
performance and reliability.
Combined with energy efficiency
and space-saving design they
deliver more compressed air and
more energy savings. The rollout
of synchronous reluctance
technology was the next step
towards even greater efficiency.
The major advantage of this
complete solution, which was
developed in partnership with
Siemens, is an efficiency gain of
approximately ten percent in the
partial-load range. Thanks to the
innovative motors and the top IES2
classification as per the new EN
50598 efficiency standard, this
solution offers unprecedented
efficiency. For example, in the
case of a CSD SFC series screw
compressor, this translates into
average energy cost savings of
around $1,250 per year, based on
approximately 6,000 operating
hours at a rate of 10 cents per
kilowatt hour. End users therefore
not only enjoy maximum flexibility
for specific applications and varying
environmental conditions, but also
with regard to load response.
VARIABLE-SPEED DRIVE
WITH HIGH SYSTEM
EFFICIENCY
Where a compressed air system
includes a number of compressors,
continuously running compressors
with IE4 motors cover base load
demand, whilst additional peakload
compressors respond flexibly
to meet extra demand. To ensure
maximum efficiency the system is
controlled by a Sigma Air Manager
4.0. With the Siemens synchronous
reluctance drive systems, this will
be performed with even greater
efficiency in the all-important
partial load range.
This development has come about
in response to the fact that the new
EN 50598 eco-design standard
applies not only to the efficiency
values of individual drives, but
represents a shift in regulatory
emphasis to overall system
efficiency and therefore assesses
the compliance of variable-speed
drive solutions, based on their
overall system efficiency. With its
variable-speed version (SFC) of
the ASD to CSDX series, Kaeser
paves the way for end users to
embark on a path of minimal energy
consumption and minimal operating
costs.
The variable-speed versions of
Kaeser’s CSD/CSDX series rotary
screw compressors feature a
synchronous reluctance drive
system from Siemens.
42 March 2019