X72-B

Designed with vessel efficiency and environmental friendliness in mind

EEDI regulations, low vessel emissions, and operational flexibility have been key considerations in designing the X72-B as the preferred engine for new merchant vessels. The new engine offers high levels of propulsion efficiency resulting from its lower engine revolutions. The wide rating field presents increased flexibility for selecting the most efficient propeller speed, thus giving minimised daily fuel consumption, by using the appropriate propeller diameter for the projected ship design and mission profile. For vessels with draught restrictions affecting the propeller diameter, a higher propeller speed can be selected. This, together with the favourable piston dismantling height, makes this engine very attractive for Suezmax tankers, Capesize bulk carriers, as well as Panamax and Sub-Panamax container vessels.

This low-speed marine diesel engine with 720mm cylinder bore is available in 5- up to 8-cylinder configuration, covering a power range from 10,600 to 31,360kW at 66 to 89rpm.


OPERATIONAL FEATURES

WinGD’s well proven electronically-controlled common-rail technology plays a key role in enabling ship owners to reduce fuel costs, mainly through the flexibility of the fuel injection and exhaust valve operations. This flexibility results in lower fuel consumption across the entire operating range, especially at low and part loads. In addition, different engine tunings (Standard, Delta, Delta By-Pass and Low Load) are available in order to meet specific customer requirements. Intelligent Combustion Control (ICC) system enables further fuel savings and balanced working of each cylinder.

The engine is fully compliant with IMO Tier III NOx emission levels when equipped with a SCR catalyst system. The introduction of the EEDI index also puts an emphasis on CO2 emissions and total vessel efficiency. The X72’s internal engine and propulsion efficiencies, and the possibility to apply various Power Take-Off (PTO) arrangements for on-board electricity production, makes it easier for shipyards to meet these new requirements. Waste Heat Recovery (WHR) offers further possibilities for maximising energy efficiency and for reducing emissions.

TOTAL COST OF OWNERSHIP

All areas of lifecycle costs have been taken into account for the X72-B. The selected stroke-to-bore ratio makes the engine compact and has a positive impact on the manufacturing and component cost. The X72-B is designed for exceptional reliability and for long periods of maintenance-free operation. It also allows extended Time Between Overhaul (TBO) of the critical components, to as much as 5 years. The service-friendly design will reduce downtime, maintain vessel operation, and cut operating costs. Together with Condition Based Maintenance (CBM) and service agreements, the overhaul interval could be even further extended, thus minimising maintenance costs and maximising the revenue-earning capability of the vessel.

DF-READY OPTION

All Generation X engines can be converted to use LNG as fuel. For simplifying the future conversion WinGD has introduced the DF-ready version as an option. The DF-ready engines can be easily converted to dual-fuel, as no major structural components need to be modified. All parts, which are to be replaced at a later conversion, are either typical wear parts or specific X-DF components and systems. DF-ready version is the recommended solution for LNG-ready ships.

All data provided on this site is for information purposes only, explicitly non-binding and subject to changes without further notice.

Basic Engine Data

Technical Information

WinGD X72-B

IMO Tier II/Tier III (SCR)
Cylinder bore
720mm
Piston stroke
3086mm
Speed
66-89rpm
Stroke/bore
4.29
Mean effective pressure at R1
21.0 bar

Rated power, principal dimensions and weights

Output in kw at
84rpm66rpmLength A (mm)Weight (tonnes)
Cyl.R1R2R3R4
5196001430014550106008085481
6235201716017460127209375561
72744020020203701484010665642
83136022880232801696011960716
Output in kw at
84rpm66rpm
Cyl.R1R2R3R4
519600143001455010600
623520171601746012720
727440200202037014840
831360228802328016960
Cyl.Length A (mm)Weight (tonnes)
58085481
69375561
710665642
811960716
Dimensions in mm
B C D E E*
4780 1575 10790 4710
F1 F2 F3 G
13655 13655 12730 2455

Brake specific fuel consumption (bsfc) in g/kWh

Full load, Rating point R1 R2 R3 R4
BMEP, bar 21.0 15.4 21.0 15.4
BSFC Standard Tuning 166.8 159.3 1668.8 159.3
Part load, % of R1 85 70 85 70 65
Tuning variant Standard Standard Delta Delta Low-load
BSFC 163.2 162.8 162.5 161.3 157.3
Full load, Rating point
BMEP, bar
R1 R1 R3 R4
21.0 15.4 21.0 15.4
BSFC
Standard Tuning
R1 R1 R3 R4
166.8 159.3 1668.8 159.3
Part load, % of R1
Tuning variant
85 70 85 70 65
Standard Standard Delta Delta Low-load
BSFC
85 70 85 70 65
163.2 162.8 162.5 161.3 157.3

Installation

Marine installation manual

Marine Installation Manual (MIM)

Modified 22 May 2018

Installation instructions & concept guidance

Complete Package

Modified 07 May 2018

DG9709 - Instruction and Limits for Engine Alignment

Modified 07 May 2018

DG9710 - Engine Seating/Foundation Fitting Instruction

Modified 07 May 2018

DG9715 - Assembly Instruction WinGD Friction Type Stays

Modified 28 May 2018

DG9715 - Assembly Instruction WinGD Single Acting Hydraulic Type Stays

Modified 07 May 2018

DG9721 - Concept Guidance for Fresh Water Generation

Modified 07 May 2018

DG9722 - Flushing Instruction for Lubricating Oil System

Modified 07 May 2018

DG9723 - Concept Guidance for Operation on Distillate Fuels

Modified 07 May 2018

DG9723 - Concept Guidance Fuel Oil System

Modified 07 May 2018

DG9723 - Concept Guidance Fuel Oil Treatment

Modified 07 May 2018

DG9726 - Concept Guidance for HP SCR Installation

Modified 07 May 2018

DG9730 - Recommended Fluid Flow Rates vs Velocities

Modified 07 May 2018

Drawings

Marine Installation Drawing Set (MIDS)

DG9710 - Engine Seating & Foundation

Modified 01 June 2018

DG9710 - Engine Seating & Foundation

Modified 23 May 2018

DG9710-01 - Tool Engine Alignment

Modified 23 May 2018

DG9710-01 - Tool Engine Alignment

Modified 01 June 2018

DG9721 - Cooling Water system

Modified 22 May 2018

DG9722 - Lubricating Oil system

Modified 22 May 2018

DG9723 - Fuel Oil System

Modified 22 May 2018

DG9724 - Leakage Collection & Washing system

Modified 22 May 2018

DG9725 - Starting Air System

Modified 23 May 2018

DG9726 - Exhaust System

Modified 22 May 2018

DG9725 - Starting Air System

Modified 01 June 2018

MIDS complete package

Modified 20 July 2018

DG9715 - Engine stays

Modified 20 July 2018

Powertrain

Coupling Flange Crankshaft - Propeller shaft

Modified 29 May 2018

Engine and System Dynamics

Countermeasures

Countermeasures

Modified 28 May 2018

Forces + Moments

Forces + Moments

Modified 28 May 2018

Operation & Maintenance

Fuel Lubricants Water

Validated Fluids for Engine Operation

Cooling Water

Modified 22 May 2018

Fuel

Modified 22 May 2018

Lubrication & Validated Lubricants

Modified 22 May 2018

Who is WinGD

About WinGD

Headquartered in Switzerland, powering merchant shipping since 1893