scope:

This standard describes generic measuring and calculation methods to evaluate the energy efficiency of multiple components connected in a system called a functional system.

A maritime functional system consists of multiple components. The system is further recognized by integrating multiple functions to achieve an overall goal.

The purpose of this standard is to relate the energy efficiency of various functional systems with other installations onboard of same functionality, thus ensuring that efficient design is rewarded.

Maritime systems are grouped according to their functionality, to compare the energy efficiency of functional systems which could fulfill the same task onboard a ship.

The standard is limited to only include functional systems for which a "unit output" can be clearly defined and which require energy to function.

The standard is mainly covering energy consuming functional systems and is not attempting to provide a lifecycle assessment (LCA). An LCA could prove useful when considering systems that consumes substances and which would not meet the functional requirements without the use of such; an example could be a ballast water management system using active substances (these types are not considered in this standard).

This version of the standard deals with five types of functional systems:

a. Pressure and flow

b. Lighting

c. Heating/Cooling

d. Mechanical

e. Propulsion

The standard requires specific information about the individual components forming the functional system, the ship and how the functional system will be integrated on board.

The energy efficiency is evaluated using a specified set of global ambient conditions.