Main Engine Fuel Oil Consumption Monitoring

Engine Fuel Oil Consumption

Today, more than ever industries including shipping industry are expected to decrease their CO2 emissions in order to alleviate global warming.

The European Commission supports the idea of an internationally established global solution to reduce GHG emissions from vessels. This is why in 2012 the European Commission submitted a proposal on a monitoring, reporting and verification system for vessel emissions based on fuel consumption that could lead to additional alleviation strategies.

The challenge

Shipping companies make strategic decisions to reduce everyday operational cost. Hence, fuel oil consumption becomes top priority to achieve that point.

Many shipping companies face the problem of disagreement between ship management and onboard crew to determine fuel oil consumption. This dispute arises when determining fuel consumption because factors that influence the ship engine performance depend on sailing conditions. It is quite often reported that the real quantity of the fuel consumed during the trip is found to be less than the quantity missing from the fuel boiler and this cannot be explained under normal circumstances.

In an era where environment matters and fuel consumption is a crucial parameter in a ship’s operation, the ability to make early accurate predictions is essentially needed.

Facing the problem of disagreement as mentioned above, one of the largest shipping companies in Greece discussed with LAROS team and sought a solution for one of their containerships.

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Exhaust Gas Economizer Condition Based Maintenance


Exhaust Gas Economizers in Maritime

Economizers are mechanical devices intended to reduce energy consumption, or to perform other useful function such as preheating a fluid. A common arrangement on ships with large diesel main propulsion engines is to provide an oil fired boiler and exhaust gas economizer (EGE).

The Challenge

The exhaust gas economizer is vital to economical ship operation. A breakdown could be catastrophic for the ship’s economic operation while reaching hundreds of dollars to restore the EGE. Such great damage can be prevented by keeping the EGE clean when needed and by ensuring sufficient water circulation at all times.

One of the largest shipping companies in Greece that owns mainly containerships was facing a problem with the normal operation of the Exhaust Gas Economizer in one of its vessels. This malfunction occurred due to the abnormal operation of the circulator which led to high temperatures in the EGE. For this reason, engineers needed to monitor from headquarters the water and emissions temperatures and pressures in different levels of the EGE so that they can guide the vessel crew. Moreover, the EGE performance was quite low because of sensors missing in the EGE. As a result, the crew did not have a clear image about the EGE’s condition.

The shipping company discussed with LAROS team and sought a solution for their vessel.

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