POWER September 2012 - 36

TOP PLANTS
1. Successful teamwork. Inside the 870-MW Enecogen combined cycle power plant you
find a SGT5-4000F gas turbine (right), a SGen5-3000W generator (middle), and an SST5-5000
steam turbine (left) arranged on a single shaft. Courtesy: Enecogen
representatives gave their approval to start
constructing the crossings.
Despite these challenges, the project team
completed construction with excellent safety
statistics: only two lost-time incidents with
slightly over 2 million man-hours worked. During
the project's construction period, approximately
920 employees employed by more than
30 contractors worked at the site. The project
included installation of 9,700 tons of machinery,
1,000 tons of pipelines, 2,500 tons of steel,
23,000 cubic meters of concrete, and 300 kilometers
of cables.
transforms NOx emissions into nitrogen and
water that evaporate via the stack.
As part of a turnkey project, Siemens built,
delivered, and commissioned the plant's main
components. Each of the two single drivelines
consists of a gas turbine (SGT5-4000F), hydrogen-cooled
generator (SGen5-3000), and steam
turbine (SST5-5000) (Figure 1). In addition, the
innovative instrumentation and control system
(SPPA-T3000) is from Siemens. The German
company signed a long-term service agreement
for these components.
The Dutch boiler supplier NEM built the
conventional three-pressure level heat recovery
steam generator. The following companies handled
the project's civil construction: Terracon
(piling), Porr (concrete works), ASK Romein
(steel structures), and BAM (cooling water inlet
and outlet structures).
The site is ideal for an electric plant for the
following reasons:
■ Especially developed for industrial use.
■ Abundant cooling water availability.
■ Proximity to high-voltage grid and to
high-pressure gas grid.
■ Energy savings and CO2
emission reduction
through possible future collaboration
with nearby industries.
Enecogen is now connected through a 12-kilometer-long
underground high-voltage cable
to the Maasvlakte substation, which is part of
the national grid. Gas Transport Services, the
national network operator for gas transport services,
takes care of Enecogen's gas connection.
Currently, 38 plant employees handle the
plant's ongoing operations and maintenance.
Looking ahead, Enecogen management is
searching for opportunities to collaborate with
surrounding industries.
36
Conquering Construction Hurdles
The challenges during plant construction covered
a wide spectrum. For example, because the
plant site is located in an area that had World
War II combat operations, the construction
crew had to look for possible unexploded ordnance
(UXO) during piling, excavation, and
other earthwork. Although construction workers
found some UXO, it was handled carefully, and
there were no accidents.
Another obstacle involved nearby oil pipelines.
The project team had to connect four
cooling water pipes (two in and two out) to
the Beerkanaal (Beer Channel), in Rotterdam
harbor. To reach the Beerkanaal, the four
pipes had to cross three existing oil pipelines
owned by the neighboring BP Refinery Rotterdam
(two 42-inch pipelines containing
crude oil and one 16-inch pipeline containing
fuel oil). These pipelines connect the BP
Refinery Rotterdam to the MOT (the terminal
on the Maasvlakte). The Encogen project
team diligently identified existing pipeline
locations and selected the location of the new
pipelines to ensure that construction operations
did not adversely impact BP's oil pipelines.
" In
the early stages of the project, the Enecogen
project team contacted BP Refinery Rotterdam.
Together we discussed the risks and
determined which way the crossings had to be
constructed in order to make them safe, " Maintenance
Engineer Leon Lurken said. " The
agreement on risk mitigation and construction
methods was formalized in a contract signed by
all the parties. "
After the subcontractor BAM made a detailed
design for the crossings and BP Refinery
Rotterdam and Enecogen agreed on the
safety aspects, risk assessment, construction,
and monitoring plan, BP Refinery Rotterdam
www.powermag.com
Productive Partnership
Eneco is the largest Dutch-owned energy
company. Its integrated distribution operation
covers the generation, transmission, supply,
metering, and billing of gas, electricity,
and heat for 2 million customers. By 2030,
Eneco's energy mix will consist of several
types of sustainable sources of electricity,
heat, and gas. The company is investing in
solar energy, biomass power, and wind energy
in various western European countries.
One of the leading energy groups in northern
Europe, DONG Energy is headquartered in
Denmark. Its business is based on procuring,
producing, distributing, and trading in energy
and related products in northern Europe. Besides
the Enecogen CCPP, DONG Energy's
other Dutch activities and assets include ownership
in the GATE LNG Terminal in Rotterdam,
which is under development and situated across
the harbor inlet from the Enecogen plant.
By building the Enecogen plant, Dutch Eneco
and Danish DONG Energy are promoting their
mutual goal of providing clean and reliable energy
to the Netherlands while seeking to make
profitable returns on their joint investment.
" We are very pleased with this new plant,
which is fully in line with our strategy to improve
the sustainability of the energy supply, "
said Jeroen de Haas, Eneco CEO. " Enecogen
improves our ability to balance the fluctuations
in the electricity produced by our wind farms. "
As is Eneco, DONG Energy is trying to
cut CO2 emissions in its overall fleet by adding
new gas and biomass-fired power plants
and offshore wind farms. The Enecogen facility
fits into its plan to promote sustainable
energy. Besides its Dutch holdings, it owns
power generation facilities and projects in
Germany, Sweden, Norway, and the UK.
DONG Energy's goal is that by 2020,
renewables will supply the energy for approximately
50% of its heat and power production.
Looking ahead very long term, the
company's ambition is that by 2040 around
85% of its electricity and heat generation will
come from renewable energy. ■
-Angela Neville, JD is POWER's
senior editor.
POWER | September 2012
http://www.powermag.com
POWER September 2012

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