The Naval Architect February 2010

Feature 3 | finland’s marine industries
shore-based industries for more than 10
WÄRTSILÄ 34DF IMO Tier II
years, particularly the energy generation Main data
Cylinder bore ................................. 340 mm Fuel specification:
market. “Shipping has been slow to adopt
Piston stroke................................... 400 mm Fuel oil .................................... 730 cSt/50 °C
the technology, but the availability of the
Cylinder output .................. 435, 450 kW/cyl 7200 sR1/100 °F
Speed .....................................720, 750 rpm ISO 8217, category ISO-F-DMX,
fuel [LNG] is the key to the development
Mean effective pressure ........20.0, 19.8 bar DMA and DMB
Piston speed........................... 9.6, 10.0 m/s Natural gas
of dual fuel engines.”
MethaneNumber: 80
In addition there is the changing
LHV: min. 28 MJ/Nm³, 4.5 bar
BSEC 7700 kJ/kWh
regulatory environment means that not
only has diesel increased in price, but
Rated power
60 Hz 50 Hz
the cost of using diesel will increase as a
Engine type 435 kW/cyl, 720 rpm 450 kW/cyl, 750 rpm
result, making alternative fuel options a
Engine kW Gen. kW Engine kW Gen. kW
more attractive proposition. 6L34DF 2 610 2 510 2 700 2 600
More owners are looking into the
9L34DF 3 915 3 760 4 050 3 890
12V34DF 5 220 5 010 5 400 5 190
LNG or dual fuel option, claims Mr
16V34DF 6 960 6 680 7 200 6 920
Stiefel, who says that they are now
Generator output based on a generator efficiency of 96%.
getting many enquiries from owners
Engine dimensions (mm) and weights (tonnes)
that operate merchant vessels other than
Engine type A B C D F Weight
gas carriers, which already employ the
6L34DF 5 280 2 550 2 305 2 345 1 155 34
technology.
9L34DF 6 750 2 550 2 305 2 345 1 155 47
In general Mr Stiefel estimates that
12V34DF 6 615 2 665 3 020 2 120 1 475 59
the capital costs for installing LNG
16V34DF 7 735 2 430 3 020 2 120 1 475 75
power on a vessel are 30% higher than
For definitions see page 71.
WÄRTSILÄ 50DF IMO Tier II
for a standard design. In the current
Main data
financial climate that may cause
Cylinder bore .................................. 500 mm Fuel specification:
Piston stroke................................... 580 mm Fuel oil .................................... 730 cSt/50 °C
difficulties for the initial funding of a Cylinder output .......................... 950 kW/cyl 7200 sR1/100 °F
Speed ....................................500, 514 rpm
newbuilding, however, the operational
ISO 8217, category ISO-F-DMX,
Mean effective pressure ........20.0, 19.5 bar DMA and DMB
costs are significantly lower. “We
Piston speed............................. 9.7, 9.9 m/s Natural gas
MethaneNumber: 80
estimate that the extra capital costs can LHV: min. 28 MJ/nm³, 5.5 bar
BSEC 7410 kJ/kWh
be recovered within five years,” said
Mr Stiefel, though he points out that Rated power
each project would have to be looked
50 Hz, 60 Hz
Engine type
at individually. Engine kW Gen. kW
As such the company will do the
6L50DF 5 700 5 500
8L50DF 7 600 7 330
comparisons for prospective clients. 9L50DF 8 550 8 250
“We do the feasibility studies that
12V50DF 11 400 11 000
16V50DF 15 200 14 670
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compare the operational costs with
18V50DF 17 100 16 500
Generator output based on a generator efficiency of 96.5%.
standard designs and compare the
capital costs also and then calculate
Engine dimensions (mm) and weights (tonnes)
Engine type A B C D F Weight
the payback time for a particular
6L50DF 8 115 3 580 2 850 3 820 1 455 96
investment, we find it pays off very
8L50DF 9 950 3 600 3 100 3 820 1 455 128
9L50DF 10 800 3 600 3 100 3 820 1 455 148
well,” he said. 12V50DF 10 465 4 055 3 810 3 600 1 500 175
Furthermore, with new regulations
16V50DF 12 665 4 055 4 530 3 600 1 500 220
18V50DF 13 725 4 280 4 530 3 600 1 500 240
coming vessels will need to fit SOx For definitions see page 71.
scrubbers and NOx catalysts which new regulations,” points out Mr Stiefel. vessels, said Mr Stiefel, but other areas
increase the cost and complexity of And not to mention the probability that of the Baltic, Lubeck, Gothenburg and
operating a conventionally powered the special low-pollution zones will be Stockholm are looking at projects that
ship. The introduction of Sulphur further extended. are large enough o refuel ro-ro ferries,
Emission Control Areas along with As a result the main obstacle that he said.
NOx control zones and the North is currently seen by Wärtsilä to the It is in this maritime sector, ferries,
American proposals to curb pollution introduction of LNG powered ships is which operate from point to point that
within 200nm of the USA’s coast will the availability of the fuel itself. “The the first non-gas carrier dual fuel orders
mean that some vessels will incur technology is a done deal, it is accepted,” are likely to come from, Mr Stiefel
further costs. said Mr Stiefel, “we now need to solve believes. However, the regulations on
“Of course there is also a cost that the issue of sourcing fuel”. how the fuelling will work still need to
conventional vessels will incur to fit all Availability in Norway remains be worked out and he admits that the
of the machinery that will deal with the small scale, trucks that load offshore discussions around this are ongoing. NA
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56 The Naval Architect February 2010
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