Ltd., site near Rawalpindi in Pakistan.
Wärtsilä is also operating and maintaining the power plant.
The customer is Attock Gen Ltd., a
company with the specific purpose of
owning and operating the power
plant. The main sponsors are various
units within the Attock Oil Group,
including Pakistan Oilfields, Attock
Refinery Ltd., Attock Petroleum and
Attock Oil Co.
Attock Gen is Wärtsilä’s first combined-cycle plant in Pakistan following
the country’s Policy For Power Generation Projects 2002. The plant consists of nine Wärtsilä 18V46-type
generating sets with heat recovery
boilers on each. Each engine has a
gross electrical output of 16. 5 MW. In
addition, a steam turbine with a gross
electrical output of 12 MW was installed. Wärtsilä also supplied the plant
with a 132 kV switchyard.
With the combined-cycle configuration, a life-cycle efficiency of 45% at
the 132 kV delivery point can be
reached — this is 8.4% more power
than if an open-cycle system was
used, according to the company.
Wärtsilä has also been able to demonstrate, both in Pakistan and globally,
its ability to run and maintain operations so that this level of efficiency is
not compromised.
Since the engines began operation
in March 2009, the plant has been
running nonstop at full load. It is
expected to continue running as a
base-load plant for at least the next
seven to eight years, after which
To help KESC deploy the
new power plants, a con-
sortium led by GE and its
local Jenbacher gas engine
distributor — Orient Energy
Systems (OES) — began site
mobilization work at the
end of January 2009.
By installing GE’s Jenbacher “Type 6”
engines, KESC will be able to increase the
net electrical efficiency of these two plant
sites to 41.5% and produce 60% more
power while using the same amount of
gas. The gas engines can also operate at
lower gas pressures, further enhancing
overall plant reliability and availability.
To help KESC quickly deploy the
new power plants, a consortium led by
GE and its local Jenbacher gas engine
distributor — Orient Energy Systems
(OES) — began site mobilization work
at the end of January 2009.
GE Power & Water supplied the gas
engines, related equipment, comprehensive engineering and commissioning support as well as on-site project
coordination with KESC. Orient Energy
Systems was responsible for installing
the engines and providing KESC with
local customer service support.
The first section of SGTPS- 2 was
completed and turned over to KESC in
June and the plant’s remaining gen-sets
were installed in subsequent phases.
SGTPS- 2 was commissioned in the fall
of 2009 and began generating electricity for the city. KESC plans to hold a formal grand opening ceremony for
SGTPS- 2 in February 2010.
Meanwhile, the final phases of the
KGTPS- 2 gas engine power plant
were also commissioned before the
end of 2009.
When the four-phase gas engine
power project was announced, KESC
stated it selected GE’s Jenbacher
engine technology for several key rea-
sons, including its strong record of
reliability and durability in Pakistan,
where GE’s installed, 800 MW base of
Jenbacher units is supporting a diverse
array of local industrial power and
grid-support projects.
Wärtsilä
Attock Refinery, Pakistan
In March 2009, Wärtsilä commissioned a 160 MW combined-cycle
power plant at the Attock Refinery
In March 2009, Wärtsilä
commissioned a 160 MW
combined-cycle power
plant at the Attock
Refinery Ltd., site (shown
here) near Rawalpindi in
Pakistan. Wärtsilä also
operates and maintains
the power plant.
