DNV GL presents a novel approach that overcomes challenges of assessing on board energy efficiency in a consistent manner. As a result, priorities for improvement can be determined accurately.
To answer the question "How can a ship manager identify the biggest sources of useful energy that are currently being wasted on their ships?" DNV GL came up with a new methodology. This methodology is based on exergy, sometimes called available energy, which is a metric for describing the maximum useful energy that can be derived from a process, component or system.
SEEMP
The methodology can be adjusted to suit newbuilds still in the design phase or operating ships, and it is designed to help managers make the most out of their Ship Energy Efficiency Management Plans (SEEMPs). Using both on board measurements and the DNV GL modelling suite Cossmos, energy losses throughout the ship including hull, propulsion power train, machinery and electrical systems are quantified and ranked. Even difficult-to-capture processes such as throttling and fluid mixing can be incorporated.
