maretwin

DISCOVER YOUR OWN DIGITAL TWIN

A maritime energy twin is a digital replica of ship energy systems that enables real-time monitoring, simulation, and optimization of energy supply and demand as well as efficiency.
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at component level

represents the energy behavior and performance of individual devices (e.g., motors) in a virtual model

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at system level

models the interactions and energy flows between multiple connected components within a defined system (e.g., HVAC-system)

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at the overall system level

integrates all components and systems into a comprehensive model to optimize energy efficiency and performance across the entire vessel.

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example:

zero-emission fjord entrance simulated by maretwin

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>> boundary conditions for the scenario

justification for the regulations

location within a UNESCO world natural heritage site
air pollution, particularly from sulphur dioxide (SO₂), nitrogen oxides (NOx) and particulate matter (PM10/PM2.5)
the norwegian authorities are responding by gradually tightening environmental regulations

resulting measures

limited number of vessels per day
wastewater treatment, waste disposal
from 2026 and 2032 respectively: zero-emission fjord
exceeding certain limit values may result in restricted access for vessels
shore power & alternative propulsion systems

permitted technologies

no direct CO₂, CH₄ or N₂O emissions:

  • fuel cells
  • battery-electric powertrains
  • hybrid powertrains
  • biogas

shore power 

appoverview simpleship

In the scenario an exemplary system model of a cruise ship with main engines and batteries as well as adustable hotel load including thermal and electrical consumers is used. The calculation scenario for a hypothetical fjord departure with battery operation mode and adjustable hotel load is executed, using a web app from the maretwin simulation platform @FVTR.

 

Common questions:

 

  • Is it possible to sail the in the same way without producing any emissions?
  • How long will the battery last, or what distance can it cover?

>> let’s have a look at some details and results!

fjord3
This extract shows one of many subsystems: cooling units and air handling units (AHU) in the Dymola development environment @Modelica.
The maretwin simulation platform @FVTR offers you userfriendly apps to analyzing own scenarios even at component, system and holistic vessel level.
The simulation results for a conventional manoeuvre in the fjord are compared with possible zero-emission operation scenarios.
fjord4
batteries
While a fuel tank with a capacity of 10 m³ is sufficient for conventional operation, zero-emission operation is feasible but requires significantly more space and results in additional weight on board.
  • Scenario (a) uses a battery for power supply and an electric boiler for hot water and steam
  • Scenario (b) employs a battery, an electric boiler for steam generation, and a heat pump for hot water, as well as additional thermal storage systems
  • Scenario (c) includes further energy-saving measures
CONTACT US FOR MORE DETAILS!