News
新JIP:海上间歇无人值守驾驶台
JOIN THE ALERT PROJECT: SAFELY LEAVING THE NAVIGATION BRIDGE UNATTENDED FOR PERIODS OF TIME WHILE AT SEA Within the new JIP initiative Alert we will determine the conditions for when it is safe to periodically leave navigation spaces unattended and at the same time examine whether that improves the safety, working and living situation for the crew […]
Events
Publications
2013
Nieuwenhuis, Jan Jaap; Duursema, Wieger; Verhulst, Michiel
Proposed changes to EEDI framework for small general cargo ships Journal Article
In: MARIN Report, no. 107, pp. 20-21, 2013.
@article{Verhulst2013,
title = {Proposed changes to EEDI framework for small general cargo ships},
author = {Jan Jaap Nieuwenhuis and Wieger Duursema and Michiel Verhulst},
url = {http://www.marin.nl/web/Publications/Publication-items/Proposed-changes-to-EEDI-framework-for-small-general-cargo-ships.htm},
year = {2013},
date = {2013-01-01},
journal = {MARIN Report},
number = {107},
pages = {20-21},
abstract = {The Centre for Maritime Technology and Innovation, part of the Holland Shipbuilding Association and the Royal Association of Netherlands Shipowners, asked MARIN and Conoship to investigate the cause of the large scatter in the Energy Efficiency Design Index (EEDI) values of small general cargo ships. Report explains.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
2012
Dang, Jie; Brouwer, Joris; Bosman, Rene; Pouw, Christiaan
Quasi-Steady Two-Quadrant Open Water Tests for the Wageningen Propeller C- and D-Series Conference
29th Symposium on Naval Hydrodynamics, Gothenburg, Sweden , Symposium on Naval Hydrodynamics 2012.
@conference{Dang2012,
title = {Quasi-Steady Two-Quadrant Open Water Tests for the Wageningen Propeller C- and D-Series},
author = {Jie Dang and Joris Brouwer and Rene Bosman and Christiaan Pouw },
url = {http://www.marin.nl/web/Publications/Papers/QuasiSteady-TwoQuadrant-Open-Water-Tests-for-the-Wageningen-Propeller-C-and-DSeries.htm},
year = {2012},
date = {2012-08-26},
booktitle = {29th Symposium on Naval Hydrodynamics, Gothenburg, Sweden },
organization = {Symposium on Naval Hydrodynamics},
abstract = {MARIN has recently started a Joint Industry Project (JIP) on controllable pitch propeller (CPP) series called the Wageningen Propeller C- and D-series, after the successful development of the famous Wageningen B-series which are used by designers and engineers worldwide.
The B-series comprise the open water characteristics of conventional fixed pitch propellers (FPPs) designed for merchant ships with various numbers of blades and blade area ratios at different pitch. For several of these propellers, also the four-quadrant characteristics were published by MARIN in the sixties and seventies of the last century.
Today many ships are equipped with CPPs. Also used widely are the ducted CPPs, both for ships and offshore structures. The off-design performance of the CPPs is not only of importance for ships’ powering performance, but also for e.g. dynamic positioning and manoeuvring of those vessels. Due to a lack of systematic information for the CPPs in such cases, the B-series data are often used instead, both for the estimation in an early design stage and also as the final data delivered for specific new CPP designs, simply because there is no other systematic data available rather than the B-series data. However, the characteristics of CPPs differ substantially from those of FPPs. There is a high demand for developing CPP series with full off-design information - the complete two-quadrant open water characteristics at all possible pitch settings.
In order to reduce the cost, a quasi-steady propeller open water test technique has been developed and thoroughly studied under support of this JIP, which reduced the tank test time by a factor of 8 to 10. This method ensures the affordability of the tests for the C- and D-series, and therefore the whole JIP.
In addition to the propeller thrust and torque, the propeller blade spindle torque is also provided as systematic data in propeller series for the first time. },
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The B-series comprise the open water characteristics of conventional fixed pitch propellers (FPPs) designed for merchant ships with various numbers of blades and blade area ratios at different pitch. For several of these propellers, also the four-quadrant characteristics were published by MARIN in the sixties and seventies of the last century.
Today many ships are equipped with CPPs. Also used widely are the ducted CPPs, both for ships and offshore structures. The off-design performance of the CPPs is not only of importance for ships’ powering performance, but also for e.g. dynamic positioning and manoeuvring of those vessels. Due to a lack of systematic information for the CPPs in such cases, the B-series data are often used instead, both for the estimation in an early design stage and also as the final data delivered for specific new CPP designs, simply because there is no other systematic data available rather than the B-series data. However, the characteristics of CPPs differ substantially from those of FPPs. There is a high demand for developing CPP series with full off-design information - the complete two-quadrant open water characteristics at all possible pitch settings.
In order to reduce the cost, a quasi-steady propeller open water test technique has been developed and thoroughly studied under support of this JIP, which reduced the tank test time by a factor of 8 to 10. This method ensures the affordability of the tests for the C- and D-series, and therefore the whole JIP.
In addition to the propeller thrust and torque, the propeller blade spindle torque is also provided as systematic data in propeller series for the first time.