wärtsilä new generation rectractable thrusters

© Wärtsilä INTERNAL

Wärtsilä New Generation Rectractable ThrustersWST-65RU Retractable-Underwater mountable thruster

Arto LehtinenVice President PropulsionWärtsilä Marine Solutions

1 © Wärtsilä Wär ts i lä New Generat ion Retractab le Thrusters Arto Lehtinen8.2.2017


This is WärtsiläA global leader in advanced technologies

and complete lifecycle solutions for themarine and energy markets

Approximately 18,800 professionals In over 200 locations In more than 70 countries

2 © Wärtsilä 8.2.2017 Wärts i lä New Generat ion Retractab le Thrusters Arto Lehtinen


WÄRTSILÄ MARINE SOLUTIONS

LEADER IN EFFICIENCY GAS AND DUAL-FUEL SOLUTIONS

ENVIRONMENTAL SOLUTIONS

THROUGH OFFERING

• Lifecycle solutions for ship owners and operators• Integrated solutions for the shipbuilding industry, owners and operators• The most competitive products and delivery process for the marine industry


HEEREMA’SSLEIPNIR

An idea worth developing



New generation semi-submersible crane vessel

DIMENSIONS

Length overall 220 m 721 ftBeam overall 102 m 334 ftLength over Work Deck 180 m 590 ftBeam over Work Deck 97.5 m 320 ftDepth to Work deck 49.5 m 162 ftDraft range 12-32 m 39-104 ft

BEHIND THE HEEREMA DEAL



An idea worth developing

Heerema was looking for a retractable thruster that could be maintained without dry docking

DP performance required thrusters with tilted shaft

No existing solutions fit this requirement

BEHIND THE HEEREMA DEAL

Propulsion layout for Sleipnir consists of 4 underwater mountable thrustersin the aft of the vessels and 4 retractable thrusters in the bow of the vessel



Development processBEHIND THE HEEREMA DEAL

Initial requestHigh level concept

Early customer involvement

Requirements definition dialogue

Design concepts, review and selection

Detailed design Testing and validation

G0Initiate

G2Execute

G2B G2DG1Plan

Wärtsilä Product Development Gate Model

Co-development



Wärtsilä Retractable Thrusters – up to 6500 KW

RETRACTABLE THRUSTERS

500 1500 2500 3500 4500 5500 6500kW

Ret

ract

able

Thr

uste

r typ

es

Wärtsilä Retractable Thrusters



Tilted thrusters = Smaller installed power

The Wärtsilä WST-45U tilted thruster overall performance is 16% better compared to the conventional thruster with tilted nozzle.

Less power required for the same DP performance. WST-45U required power 22,5 MW Conventional tilted nozzles required

power 27 MW

CASE STUDY – DYNAMIC POSITIONING

CASE STUDY BASED ON A MID-WATER SEMI-SUBMERSIBLE DRILLING RIG



Designed with regard to essential safety requirements

Risk determination

SFMEA

Hazardous study

Safety workshop/Risk Analyses

DESIGNED FOR SAFETY



Implementation of safety

Operator safety Identified hazardous zones are isolated

using controlled acces gates

Operating Modes Safety Interlocks for all operating modes

defined to protect operators

Malfunctions Series of measures are taken to keep the

unit in safe mode for all malfunctions

DESIGNED FOR SAFETY



PRODUCTDEVELOPMENT

Fulfilling design requirements



Heerema’s key requirements

Maintenance/overhaul by means ofunderwater thruster exchange

Retractable with fast, automated retraction/deployment (max 10 min)

All thrusters in the vessel have identicaloutboard part

High reliability Minimum redundancy Good serviceability Ease of operation Design for safety

Dynamic PositioningDP3 Vessel draft 32 m

TransitVessel service speed 10 knots based on 4 aft unitsVessel speed 11-12 knots with all 8 thrusters in

operationVessel draft 12 m

Retraction and deploymentRetraction and deployment mainly at transit draft,

occasionally at DP draftRetraction/deployment frequency approximately

once a month

Mounting / DemountingVessel draft 12-15 mSeastate 2

CUSTOMERS NEED



FINAL DESIGN

E-Motor

Drag chain

Telescopic shaft

Hoisting pipes

Retraction drive

Seal System

E-Motor foundation

Rack

Yoke

Foundation

Outboard guiding

Mounting Tube

Thrust pads

Thrust beam

WST-U Thruster


Inboard guiding column

FUTURE PROOFSOLUTION

Fulfilling design requirements



Wärtsilä Thrusters – Extending time between overhaul

Time between overhaul (TBO) affected by:

Usage of the thruster (operating ormission profile)

Environmental conditions Seawater temperature and debris content Lifetime of the paint system Cathodic protection (anode lifetime) Gear and bearing lifetime Seal lifetime Load fluctuations Lubrication oil conditioning (cooling,

Filtering, water separator)

THE DIGITAL TRANSFORMATION


PCMS provides options with regard to measurements and data analysis to support extension of maintenance intervals and condition based maintenance (CBM).


PCMS key benefits

CONDITION BASED MONITORING


EXTEND TIME OVERHAULS

5 . . . 10…?

Wärtsilä is proud to contribute to the remarkable Heerema Sleipnir with:

Entrepreneurial spirit

Technological know-how

Continuous dialog with the customer

Access to partners

Structured & audited gate approach

Design assurance including testing and validation

Design for safety


Arto LehtinenVice President Propulsion Wärtsilä Marine Solutions

Thank you

wärtsilä new generation rectractable thrusters

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