Eco Friendly Tugs Steer Maritime Green Concept

Azistern 3270

Marine vessels are deemed to be the most considerable source of air pollution.

Operating within a prosperous, powerful and complex international industry, they are still not affected by emission control regulations. Ports, as the main point of entry for vessels, have been perceived as areas where an extremely high level of pollutants is regularly being detected, however costal parts are also exposed to such a threat. The shipping industry is utterly cut-throat and financially delicate in terms of any disruptions in its operating concepts, thus vessel engines are designed and constructed to be endurable, utilizing the lowest quality fuel available. The competitive concept of the industry imposes the need for increased trade volumes and larger ships with larger engines. These developments affect all efforts of the world wide communities to preserve air and health quality standards.

Vessel owners and operators are gradually starting to acknowledge that economic prospect and environmental protection are not mutually exclusive. Since it is possible to reduce generated emissions, they accept the challenge and responsibility to diminish the air quality consequences of ever increasing trade volumes. Technologies for controlling emissions can be integrated within the initial design or can be equipped onto an existing vessel as a retrofit control device. Taking into consideration all the necessary requirements, it becomes obvious that emission control technology solutions are more acceptable for newbuilds since the retrofit option will depend on the space availability, alignment with other component parts or installation methods what largely depend on vessel types.

Although there is a slow pace in introduction of new emission friendly solutions in an extensive world-wide fleet, particular vessel builders and designers have already realized the importance of and necessity for being more environmentally friendly.

Azistern 3270 - Eco Friendly Tug

Offshore Ship Designers has been further developing the zero emission Green Tug design by constructing a low emission diesel electric harbor tug for IJmuiden based Iskes Towage & Salvage.

The Azistern 3270 tug will be run by three diesel gensets driving electric motors mounted over azimuthing propellers aft and a Voith in line thruster forward and is anticipated to reduce emissions by 30% compared with conventional, similar sized harbor tugs currently in service. Decisions on final battery size and engine configuration are yet to be decided. The hullform will be redefined using computational fluid dynamics (CFD) to optimize its resistance for transit speeds of 7-l0 knots. It has been estimated that approximately 35% of fuel consumption is used during transit. With the optimized low-resistance hullform, savings of around 15% can be made when compared to a conventional tug hullform. The fully diesel-electric propulsion concept of the Azistern 3270 tug will be more energy efficient than traditional diesel direct drive. There will be no more need for hydraulic transmission in the operation of deck machinery, such as winches, resulting into lower fuel consumption. A high working load is kept on only one engine to contribute to emission reduction. The power needed to produce the maximum 70 ton bollard pull is 4500kW, however only 10% of this power is required to take the tug from one point to another one. While operating, only one engine or the battery will be used for 90-95% of the time, while all three gensets will be running at the same time for only about 5% of the time. For a conventional tug, both main engines run 2000k W at very low load for 95% of the time, generating relatively high emissions.

The two contracted tugs will be built at Damen Shipyards, Hardinxveld. The delivery is expected to take place in the mid of 2013.

World Maritime News Staff, January 27, 2012; Image: Damen Shipyards

Share this article

Follow World Maritime News

In Depth>

Events>

<< May 2015 >>
MTWTFSS
27 28 29 30 1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31

Electric & Hybrid Marine World Expo 23 June – 25 June

Electric & Hybrid Marine World Expo, to be held in Amsterdam, the Netherlands, from 23-25 June 2015, is dedicated solely to showcasing the very latest and next-generation electric and hybrid marine propulsion technologies, components and solutions.

Why visit Electric & Hybrid Marine World Expo?

Expect to see technologies and components including:

• Test and measurement tools
• Simulation software
• Energy storage solutions including lithium-ion technology
• Electric motors
• Permanent magnet motors
• Microturbines
• Electric outboards
• Cooling systems
• Drive control systems
• Brushless motors
• AC/DC motors
• Super-capacitors
• Converters
• Inverters
• Diesel/electric generators
• Gen-sets
• Emission reduction technology
• Exhaust gas cleaning systems / scrubbers
• Waste heat recovery systems
• Electric/hybrid control systems
• Electric pod/bow/side thrusters
• Electric/hybrid propulsion technology and systems
• Electric/hybrid crane, winch, cargo door systems
• Hybrid electric drive systems
• Systems integration
• Ship-to-shore power
• Battery charging systems
• Fuel cell technology
• LNG/hybrid propulsion
Read more about the event here.

 

read more >

Offshore Accommodation and Access

Asia’s ONLY Event on Offshore Accommodation

Offshore Accommodation and Access is the only event in Asia that provides you the key to find cutting-edge accommodation solutions for your offshore personnel. Get the latest outlook from key players as well as technical, commercial and operational perspectives that drive the market.

More info

Contact Details:
Email: register@ibcasia.com.sg
Telephone: +65 6508 2401
Fax: +65 6508 2407
Mail: IBC Asia (S) PTE LTD, 111 Somerset Road, TripleOne Somerset #10-06 Singapore 238164

read more >

Global Tax Optimisation for Shipping

Singapore’s First Commercially-Focused Tax Event

Asia’s first commercially focused tax briefing will confront the complexities, bring case studies, review how other corporations are approaching the challenges, and offer insight into recent court rulings that can impact your company.

The 2 day briefing will provide updates, strategies and solutions for strategic as well as day-to-day tax challenges.

More info

Contact Details:
Email: register@ibcasia.com.sg
Telephone: +65 6508 2401
Fax: +65 6508 2407
Mail: IBC Asia (S) PTE LTD, 111 Somerset Road, TripleOne Somerset #10-06 Singapore 238164

read more >

Port Finance International Mexico 2015

Given the successful gathering last June of our 1st Port Finance International Mexico & LATAM, PFI will be holding the 2nd Mexican & LATAM PFI Forum.

This conference is a meeting point to understand Mexicans ports current and future opportunities and find solutions to challenges.

Mexico’s port development and operations is currently thriving, with great opportunities of product and service provider companies to access high value opportunities.

Mexico’s Infrastructure investment has grown from 3% of GDP in 2000 to nearly 5% in 2012.

A National Program has been launched, devoting nearly £65 billion to help modernize and develop four leading ports, construct ten specialized terminals and grow Mexico’s cargo handling capacity by 60%.

There has been a £2.9 billion investment into expanding the port of Veracruz which will increase the port’s terminals from 18 to 28 and enhance its cargo capacity to 116 million tons.

More info

read more >