The world's largest barge-mounted power plant will be operational in Pakistan by 1999
A 450 MEGAWATT barge-mounted combined cycle power plant is scheduled to start operating in Pakistan by 1999. The
plant, which is believed to be the world's
largest barge-mounted power plant, will
be constructed in the us on six barges
and shipped halfway around the world
to Port Qasim in Karachi.
The logistics of building a power
plant on a barge and then shipping it
halfway around the world may appear
prohibitive. However, there is an increasing need for rapidly delivered, packaged power plants to anchor industrial and
urban development. Platform or barge
mounted power plants'(BMPPS) are highly engineered power plants mounted on barges and other marine platforms
designed around utility-grade simple and
combined-cycle generating equipment.
One advantage with BMPPS is that
projects are completed at faster rate. In
the case of this project, it will be delivered and commissioned within 28
months. As the equipment and the
barges are constructed in a controlled,
factory environment - rather than at a
difficult, remote site - the project will
benefit from better quality and low
costs. There is a standard configuration
equipment to meet specific customer
needs and save time. Also, BMPPs are easier to finance than many landbased
power plants. In certain cases, the BMPPS
are excellent candidates for leasing. A
project of this nature may qualify for
special maritime financing pro-
grammes, barges are essentially ships.
Certain projects may qualify for financing from various export credit agencies.
Another advantage with BMPPS is
that they can be easily relocated. The
power plant is moved to the site once
the construction is complete. It can then
be moved to a new site it and when
required. BMPPS can also be modularised
for staged installation, expansion and
conversion. For example, the plant can
begin operating as a simple cycle and
then be phased to a combined cycle
plant when the remaining barges and
equipment are completed.
The barges are designed as intermediate and baseload plants - operating for about 5,000 hours per year. They are
expected to operate with a 60 per cent
capacity factor. The use of non -polluting fuel, LPG, ensures that the facility will meet all World Bank air pollution stadards. The cooling towers will minimise thermal discharge to the surrounding
waterways. Besides, as a precaution
against water pollution, the fuel storage
systems are constructed on land and not
on the barges.
Besides being the largest BMPP in the
world, the Port Qasim plant is expected
to be one of the most reliable power generation facilities in Pakistan. There will be a total of six barges, each 27.4 rn by
82.3 m with a depth of 4.9 m. To achieve
the 25-year design life, the hull design
calls for additional steel corrosion
allowance, a point and coating system, a
sacrificial anode system, and a preventive maintenance programme. The addition of framing and support steel for the
equipment loads and increased hull steel
thickness for corrosion allowance results
in a hull that far exceeds 11ormal. barge
requirements. Since few ships in the
world can carry barges of this size on its
deck, the delivery will be staged after the
barges are completed.
We are a voice to you; you have been a support to us. Together we build journalism that is independent, credible and fearless. You can further help us by making a donation. This will mean a lot for our ability to bring you news, perspectives and analysis from the ground so that we can make change together.
Comments are moderated and will be published only after the site moderator’s approval. Please use a genuine email ID and provide your name. Selected comments may also be used in the ‘Letters’ section of the Down To Earth print edition.