Wednesday, December 2, 2020

Maritime Research Institute News

(Photo: MARIN)

Supporting Silent Ships

Have you ever had problems talking to someone in a noisy environment such as a busy restaurant? The same happens to marine animals, which use sound to sense and interact with their environment: for communication, navigation, finding prey and even for self-defence. High ambient noise levels, which include a contribution from shipping, have an adverse impact on marine life. The world’s oceans are becoming increasingly noisy. While the size of the global commercial fleet more than doubled since the 1960s, anthropogenic noise in the oceans has actually increased eightfold.

Image: International Windship Association

Barriers, Drivers & Interaction of Wind Propulsion Technologies

Dagmar Nelissen, Senior researcher and consultant at CE Delft, will present the preliminary findings of the EU DG Clima study ‘Analysis of market potentials and market barriers for wind propulsion technologies for ships’, at next week’s Natural Propulsion Seminar. The study’s general objective is to aid the European Commission in exploring how further support can be provided to ensure that wind propulsion technologies are deployed in the shipping sector. “The CO2 abatement measures…

Photo: IRClass

IRClass Offers EEDI Validation Service

IRClass (Indian Register of Shipping) has recently included Energy Efficiency Design Index (EEDI) validation to its service offerings. This is in response to the International Maritime Organization’s (IMO) adoption of the EEDI regulation on January 1, 2013 which will apply to the majority of vessels delivered on or after July 1, 2015. Under the regulation, the EEDI value calculated for a vessel must be based on speed in ideal sea conditions. However, often such conditions are not practically achievable due to time and geographical constraints.

Photo: Damen

Van der Velden Marine Systems: Innovating Efficiency

After celebrating its 50th anniversary in 2013, Van der Velden Marine Systems, a daughter company of the Damen Group, is not resting on its laurels as the Netherlands-based company’s R&D department works to continue advancing maritime maneuvering and propulsion efficiency. “We are currently building a 97m2 Energy Saving Package (ESPAC) system for a series of three 18,000 TEU vessels being built for CMA CGM at the CSSC-affiliated Shanghai Waigaoqiao Shipyard in China,” said Edwin van Buren, Director R&D at Van der Velden Marine Systems.

Image courtesy of ClassNK

ClassNK Update Design Support Tool for EEDI Verification

Classification society ClassNK has released the latest version of its PrimeShip-GREEN/MinPower software. The software was originally developed by ClassNK and released in April 2014 to help shipyards comply with amendments to MARPOL Annex VI, specifically EEDI requirements, by calculating minimum propulsion power requirements in compliance with the IMO 2013 INTERIM GUIDELINES FOR DETERMINING MINIMUM PROPULSION POWER TO MAINTAIN THE MANOEUVRABILITY OF SHIPS IN ADVERSE CONDITIONS.

Robert Heerkink is project manager at the Ships department of MARIN, the Maritime Research Institute Netherlands.

Efforts continue to improve the Modeling of Thrusters

MARIN uses thrusters in many projects. For a typical model scale, around 1:50 to 1:60, relatively small thrusters are required. Thrusters for these models are available ranging from 50 mm to 80 mm nozzle diameters. In the past these thrusters were always modelled with a horizontal shaft. By tilting the nozzle, the closest possible match was achieved between the client specifications and the modelled thruster for the basin tests. Due to the ever-evolving process in improving the models, new thrusters were built witha 7-degree tilted thruster shaft.

'Soyo': Photo credit NYK

Naval Architects Vote NYK Coal Carrier 'Ship of the Year'

'Soyo', an NYK-owned coal carrier, has been selected as the 2012 "Ship of the Year" by the Japan Society of Naval Architects and Ocean Engineers (JASNAOE). JASNAOE’s “Ship of the Year” award has been presented every year since 1990 to a Japan-built vessel that the society considers to be the most technically advanced, well-designed, and socially conscious. Soyo was honored for its innovative air-lubrication system and its proven impact on CO2 reduction. This new air-lubrication…

MARIN Opens Depressurized Wave Basin

Following a true maritime tradition, the new DWB was christened. The representatives and attendees each had a bottle filled with water from their own organisation or habitat symbolising their connection with the new facility. MARIN’s unique Depressurised Wave Basin (DWB) was officially inaugurated on March 19 by Maxime Verhagen, the Dutch Minister of Economic Affairs, Agriculture and Innovation. Representing the combination of a depressurised towing tank with a wave maker, the DWB creates a world first.

The air supply system of the air cavity ship was reproduced faithfully on model scale.

MARIN: Air Cavities Reduce Ship Resistance

It is now proven that air lubrication leads to a reduction in power and consequently, leads to fuel savings thanks to the Joint Industry Projects PELS and SMOOTH. The projects have shown that air lubrication makes it possible to reduce power by 15% for an inland ship travelling at normal operational speeds. Although it is possible to optimise the wave pattern and the hull, skin friction is almost a constant. Reducing friction by injecting air has been tried before but actually accomplishing a power reduction has proven more difficult.

Damen to Launch New PSV Series

Damen Shipyards will unveil its new Platform Supply Vessel (PSV) at EUROPORT 2011 and will launch a complete PSV range in the next few months. The PSV 3300 E3 is a dedicated supply vessel to transport supplies to oil and gas rigs and is specifically designed to perform safely in adverse weather conditions. The first two vessels will be built at the renowned Damen shipyard in Galati, Romania. Delivery is scheduled for early 2013. Damen’s new vessel series will range from the smallest PSV of 1,500 dwt to the largest of approximately 6,500 dwt.

Image courtesy Technology Associates, Inc

The Technology EnviroMax Deepwater OSV

Technology Associates, Inc (TAI) a New Orleans based Naval Architecture firm which also has an office in India has unveiled its Technology EnviroMax 300 OSV. Utilizing a unique Designer/Builder relationship, this design was developed in conjunction with Thoma‐Sea Shipyards. The design already has up to six vessels under construction at Thoma‐Sea Shipyards’ facilities in Lockport, Laa. Thoma‐ Sea Shipyards acquired this facility from Halter Marine in 2002 and has been using it to build OSV’s up to 270ft.

A Valuable Tool for Flow Measurements

Stereo Particle Image Velocimetry (PIV) is an advanced measuring technique for obtaining 3D velocity information in a plane. PIV can be used to investigate the spatial structure of a flow by efficiently measuring in multiple planes. It is an important tool for the experimental validation of CFD calculations and for obtaining flow field information. This information can then be used for appendage or propeller design for instance. This technique is based on the measurement of the displacement Dx of particles in a target plane between two successive light pulses with a time delay.