Siemens 2013 Annual Report Download - page 14

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Lots of electricity from
hot exhaust gases
The retrofitted Unit 6 at the Kirishi facility
is a state-of-the-art combined cycle power
plant of the kind that Siemens has installed
in many parts of the world over the last few
years. Our advanced techno logy enables
the highly efficient use of fuel (natural gas
in Kirishi’s case). When the fuel is burned,
thermal energy is converted into mechani-
cal energy, which drives a gas turbine – as in
a jet engine. The gas turbine is connected
via a shaft to a generator, which produces
electricity. When emitted, the turbine’s ex-
haust gases have a temperature of be-
tween 500°C and 600°C. At Kirishi, these
gases no longer go unused but are har-
nessed to produce steam, which is then
used to generate additional energy. Thanks
to this technology, combined cycle power
plants are the most efficient type of con-
ventional power plant.
Efficiency
Two gas turbines
Prior to the upgrade, Unit 6 achieved an efficiency of 38%.
Thanks to our innovative systems, 55% of the energy contained
in the natural gas used to drive the unitʼs turbines is now being
converted into electrical energy.
We’ve sold more than 300 of our SGT5-4000F turbines worldwide.
In addition to the turbines’ high output, customers value their low
emissions and efficient fuel use.
55%
more than
300 turbines