Performance Evaluation Software

How to save an extra 0.5 to 3 tons of fuel per day

July 6th, 2017

Various ways exist to optimise the performance of your fleet. Some common solutions include slow steaming, weather routing, a design change of the hull or modification of the propellers. Yet one of the key contributors to fuel saving is often overlooked: the engine.

Imagine you could identify the reasons for sub-par engine performance at a glance. Or quantify an engine's optimisation potential precisely in terms of total propulsion performance potential? Tekomar XPERT allows you to do exactly that. Furthermore, it provides advice on retuning, adjustments and maintenance of a vessel's main and auxiliary engines. Does it pay? Let’s have a look.


Ignore your engines. Pay the price

Neglecting to inspect the condition of your engines regularly may increase fuel consumption drastically. The reasons include:

  • Bad injection timing or injection equipment (low firing pressure)
  • Clogged filters on TC air intake (low scavenge air pressure
  • High SAC water temperature or SAC condition (high scavenge air temperature)
  • Clogged air side of SAC (pressure drop across SAC / low scavenge pressure)
  • Inefficient or damaged engine room fans (low engine room pressure)
  • Worn nozzle rings (low TC efficiency)
  • Clogged economisers (high exhaust gas backpressure)


How can I check the condition of my main and auxiliary engines?

There are two typical means of assessing engine performance. Measure the fuel consumption per day/voyage – with statistics, the engine performance cannot be evaluated in detail. You might also compare relevant parameters with the original shop trial. A more or less accurate judgment is the result, depending on experience, knowledge and the time spent. Again, the action to be taken also depends on the experience and expertise of the engineer.


Tekomar XPERT and the thermodynamic approach

With Tekomar XPERT, you opt for an ISO-corrected, thermodynamic analysis based on a performance run under defined conditions at your service load. Then you compare your data with the shop trial benchmark – both ISO-corrected.


  • The crew must calibrate sensors and maintain them in good working order. Accurate and comprehensive performance data taken under performance-run conditions.
  • A good system must use normalised data for reference and actual measurement. Feed-out reference for any operation mode and for every load in entire load range from 10% to 100% engine load.


  • Quantification of any deviation of a thermodynamic parameter from reference
  • Calculation of potential fuel oil savings
  • Immediate advice on action required for improvement
  • Accurate power estimation

Adjust and save

Accurate advice on engine adjustments and maintenance lead to optimal engine performance. The effects are stretched maintenance intervals and significant fuel savings of typically 0.5 to 3t/day of fuel per engine every day.

All you need to achieve this is Tekomar XPERT and a C/E who is ready to have a closer look at engine performance.


For more details on Tekomar XPERT, please refer to our product page or contact us.

Your contact

Beat Güttinger
Head of Tekomar
+41 79 947 3728