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8/10/2019 ECO SHIP DESIGN
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TECHNICAL DIVISION
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1.General2.Eco MR Tanker
3.Performance comparison
4.Economic study
CONTENTS
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General
What is eco ship?
Eco friendly (statutory minimum requirement)
SOx (MARPOL Annex VI)
Nox (MARPOL Annex VI)
Ballast Water (BWM Convention)
Recycling (Ship Recycling Convention)
CO2 (MARPOL Annex VI)
Economic (market demand)
Fuel efficiency improvement, how much?
Desirable economic ship?
Competitiveness of shipyard
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Eco MR Tanker
Adoption of G50ME-B Engine
Stroke increased
RPM decreased
MEP(mean effective power) increased
SFOC reduced
Propeller of larger dia adopted
Propeller efficiency improved
Fuel efficiency improved by 20%
Comparison with design of 5 years ago
Comparison at same condition
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Eco MR Tanker
Adoption of G Type Engine
Change of main diesel engines to achieve high efficiency
M/E Type S 50 MC S 50 MC-C S 50 ME-C S 50 ME-B G 50 ME
BOutput 9,480 kW 9,960 kW 9,960 kW 10,680 kW 10,320 kW
RPM 127 127 127 117 100
Bore 500 500 500 500 500
Stroke 1,910 2,000 2,000 2,214 2,500
Ratio of B/S 3.8 4.0 4.0 4.4 5.0
SFOC 174 g/kWh 173g/kWh 170 g/kWh 168 g/kWh 168 g/kWh
M.E.P18.0bar at127rpm
20.0bar at127rpm
20.0bar at127rpm
21.0bar at117rpm
21.0bar at100rpm
Trend
[MAN Diesel & Turbo : Engine Selection Guide & Marine Engine Program]
* Criteria : Standard point(L1) on Layout diagram for engine power and speed
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Eco MR Tanker
New Development Performance Upgrade
4000
5000
6000
7000
8000
9000
10000
12 13 14 15 16 17
Speed Power Curve
Speed in Knots
kW
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Eco MR Tanker
New Development Performance Upgrade
0
2
4
6
8
10
12
20,000 30,000 40,000 50,000 60,000 70,000 80,000
EEDIValue(g-C
O2/tonmile)
Capacity (DWT)
MR Tanker
EEDI Calculation
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Eco MR Tanker
New Development - Adoption of G Type Engine
Changes to Propeller Diameter Comparison of Stern Frame Outline
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Eco MR Tanker
Adoption of MAN G-ME-B Type Engine
Countermeasures against disadvantages
Increase the diameter of the intermediate shaft
Apply the heavy tuning wheel & turning wheel
Adjust the shaft bearing position & offset
Type Advantage Challenge
6S50ME-B 6G50ME-B
Can adopt a propeller with
bigger diameter at lower
speed
Increased efficiency of
propeller
1. Increased excitation force due to the
tangential torque and the moment of
inertia of propeller
The level of torsional vibration isincreased.
2. Increased propeller mass
Alignment problems
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Performance comparison
Old MR tanker vs New MR tanker* assuming steaming of 240 days in a year
Old MR tanker New MR tanker
Condition Design Design
.Speed (knots) 14.0 14.0
Power w/ S.M 15%(kW)
- -
SFC (g/kw.h) - -
DFOC (ton/day) 21.6 17.7
FOC (ton/year) 5184 4248
Annual FO Cost ($) 3.11 Mil 2.55 Mil
* The price of bunker oil is assumed as 600 $/ton
Annual FO Cost comparison ($)
New MR : 2.55 Mil
Old MR : 3.07 Mil
Diff./[Year] : 0.56 Mil
Diff./[25 Year] : 14.0 Mil0.01000.0
2000.0
3000.0
4000.0
5000.06000.0
Old MR New MR
5184.0
4248.0
Old MR
New MR
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Performance comparison
g/(tonx
N.M
)
1.341 1.350
1.392
1.000
1.100
1.200
1.300
1.400
1.500
1.600
SEALION-67K DELTA-64K(Wartsila) DELTA-64K (MAN)
g/(ton x N.M) for Designed condition
A B C
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Performance comparison
12 13 14 15 16 17
POWER(KW)
Speed in Knots
(Design draft)
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Performance comparison
12 13 14 15 16 17
POWER(KW)
Speed in Knots
(Ballast draft)
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Performance comparison
Supramax
Yard A B C
Condition Ballast Design Ballast Design Ballast Design
Speed (knot) 12 13 12 13 12 13 12 13 12 13 12 13
Power (kW) 2920 * 3800 3542 4624 3070 * 3920 3407 4433 2976 * 4005 3439 4406
SFC (g/kw.h) 176.7 175.1 175.6 173.6 176.4 174.3 175.6 173.1 162.9 161.7 162.4 161.2
DFOC (ton/day) 12.4 * 16.0 14.9 19.3 13.0 * 16.4 14.4 18.4 11.6 * 15.5 13.4 17.0
Operating Profile (%) 15 35 15 35 15 35 15 35 15 35 15 35
FOC (ton/year)446.4 1344.0 536.4 1621.2 468.0 1377.6 518.4 1545.6 417.6 1302.0 482.4 1428.0
3948.0 3909.6 3630.0
Annual FO Cost ($) 2.43 Mil 2.40 Mil 2.23 Mil
Rank 3 2 1
* The price of bunker oil is assumed as 615 $/ton
Annual FO Cost comparison ($)
Rank 3 : 2.43 Mil
Rank 1 : 2.23 Mil
Diff./[Year] : 0.20 Mil
Diff./[25 Year] : 5.0 Mil
* assuming steaming of 240 days in a year
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Performance comparison
Supramax* assuming steaming of 240 days in a year
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Performance comparison
Kamsarmax* assuming steaming of 240 days in a year
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Economic study
Which decision?
Operation with 52K Bulk Carrier (2003 built)
Replace with eco ship
or
Continue with 2003 built ship
New construction price: 25 M USD2ndhand ship price (10 years old): 16 M USD
Capital cost: 9 M USD
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Economic study
Assumption
1. Ship type : Supramax 52K Bulk carrier (2003 built)
2. Sea route : Indonesia taboneo -> China nansha
3. Loading cargo : coal
4. Operating day : 290 days
- voyage number 17 (17day per 1 voyage number)
- ship speed : 14.5 knots
- sailing day : 7 day
- in port day : 10 day (taboneo 6 day, nansha 4 day)
5. Freight rate (per voyage) : USD 550,000, (USD 11/ton, 50,000ton cargo)
6. Bunker cost : Singapore (2013.10.24)
- IFO380 : 613.5$, MDO : 916.5 $
7. Fuel oil consumption 2003 built ship Eco ship
Voyage 25.0 ton/day 21.1 ton/day
In port 6.0 ton/day 6.0 ton/day
Fuel consumption
(1 voyage)
144,173 $ 127,424 $
Fuel consumption(Year) 2,450,941 $ 2,166,207 $
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Economic study
Net Present Value (NPV) comparison
NPV at 2023
Replace with eco ship : 45.3 M USD
Continue with 2003 built ship: 42.6 M USD
(Difference: 2.7 M USD)
NPV at 2033
Replace with eco ship : 64.7 M USD
Continue with 2003 built ship: 61.5 M USD
(Difference: 3.2 M USD)
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Thank you for your attention!