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Dawning of the Age of Aquarius

A modern approach towards using renewable energy on ships.

In 1819 the SS Savannah was the first steamship to cross the Atlantic Ocean, however most of the distance covered during that historic voyage was due to sail power. The steam engines were fitted to act as a secondary propulsion source and designed to be used only when there wasn’t enough wind present for the sails to move the vessel.

In the century that followed, engine power and wind power worked alongside each other to move the ships that carried trade across the globe. As engines became more powerful and efficient they became the primary propulsion source for shipping and by the 1920’s, sails had all but vanished from large commercial ships.

Now in the second decade of the 21st century, sail power is once again being looked at as a source of propulsion for commercial vessels as the shipping sector adjusts to emission reduction targets and the need to reduce fuel costs. In addition, recent advances in solar cell technology mean it is also feasible to install sizeable solar power systems onboard ships and therefore it seems only logical to try and combine wind & solar power into one solution.

Aquarius Eco Ship Model

Aquarius MRE (Marine Renewable Energy) is a wind & solar power solution for ships developed by Eco Marine Power (EMP) of Japan. However unlike the ships of old, the rigid but moveable sails of the Aquarius system are not intended to be the primary source of propulsion on-board large ships, but instead are designed to harness the power of the wind and sun in order to reduce fuel consumption.

The rigid sails that will be used by the system will use the EnergySail design which allows a single unit to incorporate several renewable energy technologies.

Less fuel consumed also means less harmful emissions are released into the atmosphere and in addition, the carbon footprint of the vessel is also reduced.

The sails used by Aquarius MRE may be fitted with marine grade solar modules and this will enable them to not only utilise the power of the wind but tap into the power of the sun as well.

An array of up to 20 of these sails could be installed on a ship and it is expected that this combined solar & wind solution would deliver annual fuel savings of up to 20% on large ships such as Capesize bulk carriers.

Aquarius MRE is not simply an array of solar panels that also act as sails. Aquarius also includes an advanced computer control system which will position the sail panels to make the best use of the available wind or position them to collect solar energy when there is little or no wind. In addition the control system includes a range of safety features which will for example; automatically lower the sail panels when very strong winds are detected.

When lowered the sails are stored in a protective housing which will prevent them for being damaged during storms or when the ship is loading/unloading cargo. The control system will also allow the crew to manually position the sail panels via a command console if required and will also monitor the performance of the entire system.

Eco Marine Power has also designed the system so that it can be used while the ship is at anchor or in port which is a major advantage over solutions that are focused on wind power alone. This achieved by using the sails as solar energy collectors with each rigid sail positioned by the computer control system to best use the available sun. The solar energy collected by the solar panels can either be fed into the ships main power supply or stored in Lithium battery modules.

The major advantage of storing the energy in batteries is that it can be used when the ship is in port, thus providing a source of emission free power. This will become an increasing important feature as ports around the world implement strict emission guidelines for vessels using their facilities. On a large ship the solar power component of Aquarius MRE could be up to 500kW and as solar cell technology advances, it will become more practical and cost effective to increase the capacity of the solar power system even further.

So will the system work? The simple answer is yes, as the basic concept of using rigid sails to reduce fuel consumption has already been evaluated.

During the 1970’s and 1980’s in response to the oil crisis, two ships in Japan: the Shin Aitoku Maru and the bulk carrier Usuki Pioneer were fitted with rigid sails. These vessels proved that a significant reduction in fuel consumption could be achieved through the use of rigid sails on-board modern commercial vessels. However when oil prices fell, further development work on these rigid sail concepts ended.

Today new materials and manufacturing techniques enable rigid sails be more robust, lighter and less costly than those trialled in the past. Combine those factors with a computer control system plus advanced battery technology and the result is Aquarius MRE - a cost effective fuel saving & emission reduction solution for the shipping sector.

Initially the focus has been to design the Aquarius MRE for use on large ships such as bulk carriers (bulkers) and oil tankers, but Eco Marine Power is currently working on a variation of the system that could be used on smaller ships and government vessels.

For more information please visit the Aquarius MRE webpage

Please note: Aquarius MRE & EnergySail are registered trademarks of Eco Marine Power Co. Ltd.

This article was originally written by Greg Atkinson of Eco Marine Power (EMP) for the Maritime Reporter & Engineering News - November 2011. Latest revision: 31st July 2016.

 
         
 

 
 
 
 
 
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Hybrid marine power solutions save fuel, reduce pollution and are cost effective. Eco Marine Power is at the forefront of developing low emission & fuel efficient solutions for shipping and has a range of innovative technologies available now. Our computer systems also provide a control interface between renewable energy & other power systems on-board ships.
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Eco Marine Power is at the forefront of developing and supplying innovative marine renewable energy technologies for shipping which harness the power of the sun & wind. These solutions include our Aquarius MRE, EnergySail & Aquarius Marine Solar Power. These solutions reduce fuel consumption, lower noxious gas emissions and deliver cost benefits.
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The Aquarius Management and Automation System or Aquarius MAS is a cost effective alarm handling, monitoring, process handling and data logging platform suitable for a wide range of ships. The system is based upon the reliable and robust KEI 3240 Data Logger and is class approved. The Aquarius MAS can also monitor fuel use & calculate vessel emissions.

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Finding the right solar, wind, electric or hybrid marine power solution can be a daunting task so Eco Marine Power works with shipyards and ship owners to help them find the best system for their needs. EMP also developments low emission & sustainable shipping concepts and designs using marine renewable energy technologies & advanced computer systems.
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