Performance Values vs. Speed – A Declaration of Independence?
Paper in proceedings, 2018

Percentage speed loss due to a deteriorated condition of hull and propeller is used as performance value in ISO 19030:2016. However, for a number of reasons, this performance value is speed-dependent. In this paper, equivalent sand roughness height is proposed as an alternative performance value, being calculated from increased shaft power due to hull-and-propeller condition. Results for a Panamax tanker (noon reports) are analysed and discussed. It is argued that uncertainties for final performance indicators can, in principle, be similar or even lower than using percentage speed loss, while removing some of the speed dependency detected in the percentage speed loss.

Ship hydrodynamics

Ship hull performance

ISO19030:2016

Hull cleaning

Author

Dinis Oliveira

Chalmers, Mechanics and Maritime Sciences, Maritime Studies, Maritime Environmental Sciences

Lena Granhag

Chalmers, Mechanics and Maritime Sciences, Maritime Studies, Maritime Environmental Sciences

Lars Larsson

Chalmers, Mechanics and Maritime Sciences, Marine Technology

3rd Hull Performance & Insight Conference, HullPIC'18
Redworth, United Kingdom,

Completing management options in the Baltic Sea Region to reduce risk of invasive species introduction by shipping COMPLETE

Interreg-BSR, 2017-10-01 -- 2020-09-30.

Subject Categories

Marine Engineering

More information

Created

11/19/2018