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ECO Retrofit – vessel efficiency upgrades

Our ECO Retrofit solution helps you identify, prioritize and implement the best retrofit measures, tailored to your operation.

Retrofit options are numerous and well-informed decisions require a good understanding of your ship design and its anticipated operation. In a stepwise approach DNV experts guide you from the first cost benefit assessment to the final design. Retrofit options with the best return on investment encompass:

  1. Bulbous bow
  2. Propeller
  3. Energy-saving devices (ESDs) and appendages

Not sure if ECO Retrofit is an option for your vessel(s)? We can provide a quick check based on:

  • your specifc input (e.g. GA, model test reports)
  • publicly available information such as AIS data, databases, photographs, etc.
  • our experience from more than 50 ECO Retrofit projects

Each design is tailormade

We utilize a formal optimization approach featuring fully parametric models, both for the propeller and the bulbous bow. While optimizing for best performance on the agreed operational profile (speed-draft-cases), boundary conditions such as hardpoints at the bow or cavitation criteria at the propeller are considered. A typical optimization involves more than 5,000 design variants analyzed on 6 operational cases.


A virtual sea trial is included

Optimization results are validated by DNV’s Ship Performance Simulator (SPS). Full-scale RANSE CFD propulsion simulations utilizing a standardized and validated power assessment provide an accurate saving figure. A comprehensive online report with 3D flow visualization show where the savings are.

Discover the advantages of retrofitting with support from DNV:

  • Fast assessment of the retrofit measures that benefit you the most
  • Clear overview of expected fuel savings from the measures, effective for your individual operational needs
  • Guidance and expert support related to tank tests, sub-suppliers, shipyard works, sea trials and more
  • Investment safety, with a higher competitive advantage on the market
  • As your independent partner, we only have your business needs in mind
ECO Retrofit_bow1and2
Reederei Claus-Peter Offen | DNV GL - Maritime

With ECO Retrofit Bow we could cut the fuel oil consumption up to 10%. The unique optimization technology and the close cooperation with DNV GL experts was very beneficial to us.

  • Carsten Witt ,
  • Head of Technical Department ,
  • Reederei Claus-Peter Offen

More about ECO Retrofit

  ECO Retrofit flyer

ECO Retrofit flyer

Download the 2-page flyer

  Retrofitting: Where the savings are

Retrofitting: Where the savings are

Read the article from Maritime Impact 01-2015