mdt alpha aft ship & propeller

1< >MAN Diesel & Turbo Morten Gotthardsen Rasch MDT Alpha Aft ship and Propeller 23.10.2015Autor

MDT Alpha Aft ship & Propeller

[Optional] subtitle,

referent and location, date

George Drossos

Head of Marine New Sales &

Promotion

MAN Diesel & Turbo Hellas Ltd


Agenda

1 Propeller optimization and FP propeller delivery from China

2 58.500 DWT ECO Supramax Bulker - Lemissoler

3 Innovative new building cases

4 Retrofit study

5 Retrofit reference cases


Agenda




4 Retrofit study



The Kappel Principle

Inspired by nature

Adopted by aviation

Now sailing the seven seas

The Kappel principle for ship propellers has been refined

over 20 years via extensive R&D

Kappel is today the most efficient propeller design,

increasing propulsive efficiency by 2-5%, compared to

conventional propellers

(by reducing tip losses)

The Kappel rights was acquired by MDT in 2012

Can be applied on both FPP and CPP

Reduces propeller induced pressure impulses. Thus larger

propeller diameters can be applied (lower rpm)


Rudder Bulb DesignOptimisation procedure

Rudder Bulb Optimisation

The rudder bulb solution is customized for each

individual project

MAN Diesel & Turbo uses an in-house

developed CFD optimisation routine based on

parametric design variables

Typically 50-100 different geometries are

analysed

Rudder bulb gain depends – apart from an

optimum shape - on thrust loading coefficient

and hub/propeller diameter ratio.


Design Demonstration ContractNo cure no pay

Design Demonstration Contract specifying:

Scope of design, supply and price

Identification of reference conditions

Technical basis for Kappel propeller gain

Agreed time frames for model test verification

MDT’s participation in model test

Warranted gain(s)

Finalization of design for production and class approval


Propeller Model Testing / Verification

Model test with final propeller

oOpen water test

oSelf propulsion test

oCavitation test

No tank test in Korea until valid

test procedures have been

defined


MAN AlphaThe supply chain – Dalian Marine Propeller (DMPP)

Dalian Marine Propeller (DMPP) is a subsidiary

company of China Shipbuilding Industry (CSIC)

Fixed Pitch Propellers (FPPs) up to 11m

Melting capacity in one time is up to 170 tons

Finished weight up to 150 tons

Production capacity of 15,000 tons annually

More than 1,500 references


MAN AlphaThe supply chain - Tong Zhou Propeller

Zhenjiang Tong Zhou Propeller Co. Ltd


Agenda




4 Retrofit study



8 x 58,500 DWT ECO Supramax Bulk CarriersLemissoler - MAN B&W 5S60ME-C8.2 + MAN Alpha Kappel FPP


Comparison of todays vessels: Daily consumption:

58,500 Dwt ECO vessels : 24.0 tons / day

Typical vessel of app. 57,000 Dwt : 29.0 tons / day

Solutions for typical vessel of 57,000 Dwt:

PMI 2 % : 28.4 tons / day

Propeller Boss Cap Fins (PBCF) 2 % : 28.4 tons / day

ECOCAM 2 % : 28.4 tons / day

Exhaust Gas Bypass (EGB) 3 % : 28.1 tons / day

Kappel propeller (for existing engine layout) 5 % : 27.6 tons / day

Mewis duct 7 % : 27.0 tons / day

Kappel propeller & Mewis duct 13 % : 25.2 tons / day

Derating, Kappel propeller & PBCF 14 % : 24.9 tons / day

Derating, Kappel propeller, PBCF & Mewis 18 % : 23.8 tons / day

8 x 58,500 DWT ECO Supramax Bulk CarriersComparison of vessel designs


Agenda




4 Retrofit study



Höegh Autoliner’s - 8500 PCTC Carriers Tank test result of Kappel FPP & Rudder bulb

Efficiency (Δ Eta D) Improved 4,8 % and 5,6 % at 16 and 18 Knots

Measured pressure pulses impulses less than 2,5 kPa.


3 x 36.000 m3 LEG ECO STAR – Ethane CarrierHartmann

7G50ME-B9.5-GI, SMCR 12040 kW @ 100 rpm

3000 kW shaft alternator

VBS1550 propeller system w/ AT3000 remote control system

6650 mm, 4-blade, Kappel and rudder bulb design


Hartmann ECO STARPropulsion system


Shaft line mounted alternator – SMG/CFRTypically used for FPP, but also available with CPP

RPM

Power

100 %

60 %

Rated powerReduced power

Fitting the shaft alternator poles to the int. shaft


Agenda




4 Retrofit study



RETROFIT STUDYBulk Carrier 53.000 DWT HandyMax


Direction of the system optimization ?


Choosing the right solutionThink it trough from the start…


Agenda




4 Retrofit study



Frontline de-rating projectData logging for verification of fuel oil saving


Case - Retrofit Market156,000 DWT Crude Oil Carrier - Kappel and Mewis duct

156,000 DWT crude oil carrier

MAN B&W 6S70MC – 18,660 kW @ 91 rpm

8.2 m four-bladed fixed pitch propeller

Original design:

Top speed: app. 16.2 kts

Future service profile:

Min. top speed : 14.0 kts

New optimization speed : 12.5 kts

Max. propeller diameter : 9.0 m


Case - Retrofit Market156,000 DWT Crude Oil Carrier - Kappel and Mewis duct

Derating of main engine – 18,660 kW @ 91 rpm 10,394 kW @ 68 rpm

Four-bladed 8.3 m conventional propeller three-bladed 9.0 m fixed pitch Kappel propeller

Torsional vibration counter measures – change of intermediate shaft

Mewis duct from Becker Marine Systems

Expected fuel oil saving at 12.5 knots : 17.5%

At new top speed of 14.0 knots : 16.0%


Case – Retrofit Market156.000 DWT Crude Oil Carrier - Kappel and Mewis duct

Kappel gain compared to existing propeller : 5.4%

Mewis duct gain : 3.3%

Synergies between Kappel & Mewis duct : 3.4%

Engine measures : 5.4%

Total fuel oil saving at 12.5 knots : 17.5%


Frontline de-rating projectDelivered to Keppel Shipyard in Singapore


Fuel Saving - De-rating and Upgrading Frontline’s 6 x 156,840 dwt Suezmax crude oil tankers

Performed at Keppel Shipyard

– as part of the vessels

5-year dockings


MAN AlphaHAFNIA SEAWAYS - Result - Real Life

SFOC before retrofit = 40 Tons/day

SFOC after = 36 – 37 Tons/day

Savings = 7,5 - 10% = 3 - 4 Tons/day


MAN Alpha Kappel propeller, fairing cone and

rudder bulb.

Kappel Blades Fairing Cone

Rudder bulb


Retrofit Rudder bulb hardwareFor installation on the yard

< 32>


Clipper Galaxy Rudder bulb space illustrationActual installation


All data provided in this document is non-binding.

This data serves informational purposes only and is especially not guaranteed in

any way. Depending on the subsequent specific individual projects, the relevant

data may be subject to changes and will be assessed and determined

individually for each project. This will depend on the particular characteristics

of each individual project, especially specific site and operational conditions.

Disclaimer


Do you have any questions?

mdt alpha aft ship & propeller

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