RZ eta-engl Kopie - HOWATHERM

10
Benefits of “smart”
frequency
converters
Volume flow measu-
ring technology
ETA SYSTEM designs are generously sized,
with flow velocities of around 2 m/s.
This means that the droplet eleminator on
the cooler can be void, resulting in a further
decrease in internal pressure losses. In
fact, the lower velocity reduces both the
pressure loss (by a square correlation) and
the electrical power consumption (by a
third correlation). Moreover, the power
consumption of the new drive concept is
lower in relative terms at reduced pressures
(approx. 15% savings at 1000 Pa, about
40% at 400 Pa), implying still higher relative
electrical power savings - with the result
of further economic benefits.
The power consumption of these units was
measured on HOWATHERM test rigs and in
RWTÜV trials and is EUROVENT-certified.
An additional improvement feature is the
execution of the fan casing in the thermally
insulated ETA 40 T sectional structure.
This design minimizes thermal bridges, and
the casing is air-tight to DIN EN 1886 tightness
class B.