PROTECTING PERFORMANCE
Eagle Filters Ltd Tel. +358 10 420 3070 Kalervonkatu 10 VAT No. FI10056470 Fax +358 10 420 3071 FIN-48600 Kotka [email protected]
The correct selection of air filters is one of
the most crucial factors affecting the
operation and efficiency of a gas turbine.
The difference between a successful and
unsuccessful selection is measured in
significant economical losses and severe
impact to environment.
What differentiates Eagle Filters from other
filter manufacturers is that we do not provide
bulk filters for applications requiring
individual solutions. We will tailor the best
solution in view of technology and economy
for the current filter house of our customer.
Air Inlet Filters for Gas Turbines
m)
Compressor fouling occurs when very small particulate pass
through the filtration system and adhere to the
compressor blades. The adhesion of dirt to the leading edges
and surfaces of the finely balanced blades alters their
aerodynamic properties and therefore the mechanics of the
compressor. These changes are responsible for the
reduction in effeciency and output of the turbine.
There are no substantial differences between the best known
filter brands when examining the ability to filter
large particles, 1 µm and above. Capturing particulate of this
size and above is comparatively simple, F8 filters
have a >98% efficiency rate. This changes dramatically when
considering the particulate that cause most fouling,
0.2 - 0.4 µm, with a peak at 0.3 µm. At this size F8 filters only
achieve ~40% efficiency rate.
In Industrial areas these smallest particles, such as
unburned hydrocarbons, are very prevalent, primarily as a
result of human activity: combustion processes,
manufacturing, road traffic, air transport and shipping.
The effects of fouling can be measured in financial and
enviromental terms. The losses incurred by operators
often runs into many millions of Euros much of which could
be saved by employing better filtration.
PROTECTING PERFORMANCE
Eagle Filters Ltd Tel. +358 10 420 3070 Kalervonkatu 10 VAT No. FI10056470 Fax +358 10 420 3071 FIN-48600 Kotka [email protected]
Figure b) presents the pressure losses of some cartridge
filters commonly used in power plants. The pressure losses
of clean filters are close to each other, but as the filters are
used for a length
of time, the differences become notable. The typical average
pressure loss of Eagle Filters’ cartridge filter is more than 200
Pa lower than that of conventional pulse filters. Since Eagle
Filters’
cartridge filters feature a smaller pressure loss, they also
achieve the final pressure loss later.
Pressure loss is another manageable factor that has an ad-
verse effect on running costs. Pressure loss or DP is direc-
tionally proportional to production capacity. As Dp rises out-
put capacity drops. For large industrial machines a 100 Pa
rise in Dp represents a 0.15 % loss in output capacity.
You no longer need to accept an increase in
DP or loss of output due to moisture or power
restrictions relating to weather conditions. We
make no compromises with the quality of
materials used.
This is why our filters also operate reliably in the
harshest of climates, and impurities cannot pass
through the filter to foul the compressor.
This filter manufactured by a competitor of
Eagle Filters did not even last for two weeks in a
tropical environment.
The filters were replaced with filters made by Eagle
Filters, and their service life was extended to one year.
If the filter you are currently using does not meet up to
the special requirements of your application, if the
mechanical durability of the filter is poor, or if the
air volume of the filter has been specified incorrectly –
contact us!
Both laboratory tests and practical use by
customers have indicated that filters made by
Eagle Filters are reliable and well functioning. Since
the operating costs are reduced thanks to better
filtering efficiency and lower pressure loss, a filter tailo-
red for a particular customer’s needs is a much more
economical option than a mass-produced
filter.
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