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Home » Case Studies » Early Detection of Combustion Imbalance Helps Optimize Fuel Efficiency for Doosan-Sulzer 12-Cylinder Engine on Cargo Ship.

EEarly Detection of Combustion Imbalance Helps Optimize Fuel Efficiency for Doosan-Sulzer 12-Cylinder Engine on Cargo Ship.

Background

Equipment

Doosan Sulzer

Vessel

Cargo Ship

Solution

Engine Condition Monitoring System

Customer

Cargo Ship Operator

Objectives

 Test our system’s capability to Identify component level engine faults as well as help avoid unnecessary engine maintenance

Highlights Of Our Product

Engine
Agnostic

The System Uses Two Non-Invasive MPU Sensors.

Emission Control

The Sensors Requires Once-In-A-Lifetime Calibration.

Pin-point existing And Emerging Faults At The Component level

Remote Monitoring of all Assets Under a Single Central Command

Scientifically Extend Overhaul Intervals with Significant Cost Savings

Easy To Install And Operate

Evaluation Process

  • Both engine condition monitoring and TorqueSense systems were installed on the main engine
  • Remote access to the data was shared with the Neptunus team.
  • Our team focused on raw files with an RPM of 80 for analysis.
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Discovery/Insights from Our System

  • For the Doosan-Sulzer 12-cylinder 2-stroke engine, our Engine Condition Monitoring System found that although the overall health parameters at 80 RPM were satisfactory, there was slight deterioration as shown by the mechanical health indicator.
  • On further investigation, we identified that when the damper gets fully excited at about 80 rpm, it adds a non-linear delay (twist) to the crankshaft.
  • This leads to a change in fuel injection timing, causing a small imbalance in the combustion conditions of a few cylinders.
  • As a result, the fuel efficiency decreased by over 1.2%.
  • Taking the damper’s delay into consideration while changing valve setting and fuel regulation timing could lead to over 1% in fuel consumption savings, which is to the tune of 400 to 500 tonnes of fuel per year for an engine this size.
Overall Engine Health Indicator
RPM Status

Conclusion

It is a reliable tool to defer unnecessary maintenance action.

The system helps to accurately to pin-point issues of any rotating machines

The engine condition monitorin can be used as a mechanism to identify fuel loss.

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Neptunus Power Plant Services Pvt. Ltd.

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Neptunus Main Office

A 554/555, TTC Industrial Area,
MIDC Mahape, Navi Mumbai,
Maharashtra 400710, India.

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Ras Al-Khaimah, UAE.

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dataVIB Impédance

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91400 Gometz-la-Ville,
France.

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