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INSIDE 3 Propulsion Energy Consumption Study: 5500 TEU container

5 Tracking Vessel Performance for Fleet Wide Efficiencies

4 RoPax Color Line & Maran Tankers install dynamic trim system

5 Eniram and ABB’s joint venture 6 News from the Industry

Eniram’s Newsletter

Welcome to the second issue of Green Horizons. It’s been a busy spring season for everyone at Eniram, welcoming new customers, developing new OEM and service delivery partnerships as well as working on the latest modules of our performance monitoring system FLEET. In this issue we are excited to reveal the latest results of our study onboard a 5500TEU container which analyses the effects of real life variables on the propulsion energy consumption during various legs. With operators looking at developing more energy efficient ships those who take a proactive approach in measuring and monitoring the energy consumption of their fleet are likely to provide the eco transparency that customers increasingly require. In addition, we will address some frequently asked questions regarding our technology, latest company news and the conferences where we hope you can meet our team face to face. Lastly, we welcome new ideas and opinions so please don’t hesitate in writing to us and we will happily share them for inclusion in the newsletter. Philip Padfield, CEO, Eniram Oy

Issue 2 | May 2011

Energy Efficiency Focus: Propulsion Energy Consumption Study A regular qualm amongst the shipping industry is the lack of proof when it comes to fuel efficiency and related savings. The diversity of solutions is baffling, with savings promised by everything from anti-fouling paints to optimised propeller design and hull maintenance. With these developments, operators and owners find themselves with a growing arsenal of tools, few of which have been proven to meet the claims on fuel savings. Dynamic trimming is one solution that has already been proven to reduce fuel consumption. Ship data gathered for forming an optimal trim model can also be analysed to determine the dynamic sea margin and pinpoint the share of energy consuming factors affecting the vessel performance. In order to identify and analyse the extent to which dynamic factors (wind, depth, currents etc) affect performance & propulsion energy consumption of a vessel across different voyages, Eniram conducted a 136-day study on the energy decomposition of a 5,5000 TEU

container vessel as it completed seven legs of its journey. The dynamic data collected from the vessel’s bridge systems, automation systems, inclinometers and accelerometers was used to analyse to what extent the trim of the vessel affected its fuel consumption. Each leg of the journey

Download the full report at www. propulsionenergyefficiency-study |


Eniram’s Newsletter Issue 2 | May 2011

The potential fuel saving would have been

350 tons

was studied to show how far away from the optimum trim the vessel was operating, and the consequence of this over a significant distance. The system also took into account prevailing conditions to give an overview of where the propulsion energy was being lost. The first leg studied was over 5,000NM, between Europe and South America. During the course of this leg, the data collected showed that the vessel trimmed on average 124cm away from the optimum; equating to an energy loss of 6.8%. Despite taking into account wind and waves, this was the most significant use of energy other than propulsion for this leg. However, the return journey showed that the vessel operated at an average of 30cm away from the optimal trim, leading to an overall usage of 2.2% of the ship’s energy. In this case, the most significant loss of energy was due to wind and waves. Furthermore, after taking into account the energy waste of 7% on the third leg, the vessel operators could have saved 66 tons of fuel (or USD 33,600 if one ton of HFO is taken to be USD550) through trimming correctly. The remaining four legs continued in a similar vein to the preceding

Next Issue’s Insight Topic: Guide to performance monitoring and trim optimisation (sneak preview)



Potential margin of energy saving

ones, and showed energy losses due to incorrect trimming of 2%, 6.8%, 3.8% and 7.3% for legs 4, 5, 6 and 7 respectively. These results conclusively show that the accuracy of the trim of this container ship is significant in its operating efficiency. Although wind, waves and current all affect the overall fuel consumption of a vessel, trim was consistently one of the top three factors in energy waste and the only one that can be controlled. It would seem that even taking into account real-life variables and changing hydrodynamic forces, the trim of the vessel will almost undoubtedly have an effect on the energy consumption of a vessel. However, the varying amounts by which the trim impinges on the vessel’s operation means that the data used to determine the optimum trim must be dynamic, i.e. not based on pre-collected data, as the prevailing conditions, load and speed of the vessel are continuously changing.

As an overall average, the trim was accountable for 5% of the vessel’s energy loss over its seven legs. During the course of the 45,908 NM travelled, 9,383 tons of fuel were used – of which 2,357 were found to have been consumed for reasons |

other than propulsion. Eniram’s Dynamic Trimming Assistant (DTA) measures the trim of a vessel through continuously collecting data from the aforementioned range of sources and presents a visual traffic light guide to guide the crew. For the purposes of the study, this visual guide of where the optimal trim lies was not available to the crew.

With a normal target rate of usage of 80 % DTA would have saved around 280 tons of fuel, which equates to $163,380 savings for the vessel in less than 5 months. The study also proved environmental benefits through the significant reduction in Greenhouse Gas emissions. By sailing the vessel at optimal trim during the 136 day voyage period the operator would have prevented around 880 tonnes of CO2 entering the atmosphere. The true result of this study is however, that there is real evidence of the potential to reduce propulsion fuel consumption by controlling one of the three main causes of energy loss (discounting propulsion) – the trim of the vessel. In this particular case, the potential margin of energy saving equates to an overall average of 5%; a significant and worthwhile saving. The full report is now available for download. To view it, please visit www.

UK +44 118 927 2872 | Finland +358 10 843 3800 | USA +1 954 681 4320 | Singapore +65 9460 2319

Part 1 To measure is to know: Tracking Vessel Performance for Fleet Wide Efficiencies Today most ship operators have limited information about the fuel consumption and energy efficiency of their fleet. Performance analysis is carried out manually with operators comparing energy performance reports and audits in isolation against budget estimates. Impending energy efficiency regulations such as the SEEMP and the possible emissions trading scheme (ETS) coupled with the growing increase in the price of fuel has brought about a surge of interest in energy efficiency and emission reduction programmes. Performance monitoring offers dual benefits. It enables the crew on board a vessel to take corrective actions early in response to changing conditions that affect the fuel consumption, such as a vessel’s trim. From an onshore management perspective, it allows long term

trends to be monitored and analyzed to support easier decision making with a long term goal of developing fleet efficient operations.

FLEET Launched at the SMM show in Hamburg last year, Eniram’s FLEET is a web based onshore system that enables ship operators to analyze and track the performance of individual vessels and provides a centralized view for efficient fleet management. The FLEET system uses the same data collection and multidimensional analysis capability

as Eniram’s Dynamic Trimming Assistant (DTA).

Improve awareness of the vessel energy performance The FLEET energy module provides a breakdown of propulsion power data which can be used to pinpoint areas of energy loss and enable the onshore team to react accordingly. As shown in figure 1, these easy to interpret benchmark graphs help to identify the extent to which factors such as squatting, list, fouling, draught, wind, non optimal trim and stabilizers (where applicable) affect the vessel propulsion power consumption and overall performance. In this instance, fouling represents over a third of energy consumed other than propelling and is a potential area for improvement. The data can also be analysed to look at the energy usage of the vessel across a set time period, such as the overall propulsion power per week, month, leg or voyage. Since dynamic “real” data is used, comparative differences in vessel performance can be monitored and reviewed across a selected time period or voyage. This level of visibility can be used to operational decisions such as which vessel to use on a certain route and support maintenance decisions such as developing a timely hull cleaning schedule.

Figure 1: Comparative energy performance

Energy performance monitoring adds intelligence to seafaring and provides a proven express route to deliver cost efficiencies onshore and reduced environmental emissions. For more information on FLEET or would like to see a demonstration please email us at Next issue: Part 2 Setting Energy Performance Benchmarks |



Research: Hull Aging StudyThe effect of sea area on fouling of a cruise vessel

Customer Spotlight:

The recent Cruise Ship Miami conference in March gave us an ideal platform to share the results of our latest study carried out across 20 different cruise vessels. The study analyzed the effect of different environmental conditions on vessel hull fouling. The study showed that operating in areas with heavy development of fouling will increase cost of cruise operations by over $200k per annum per vessel. This is based on our analysis on vessels with counter fouling (anti-fouling, brushing etc) measures in place without which the costs could be considerably more. Key highlights include: • Comparative analysis of fouling operating across different seas* • Pinpoint the effects on fouling as a vessel has moved from one sea area to another

• Illustrative case studies of how fouling develops and what impact hull cleaning has on vessel performance in the short and long term Our in house research team is also working on studies to analyze the extent to which different factors (vessel, route, environment) affect the sea margin across different vessel types. If you are interested in learning more about our hull aging study or any other research projects more please email greenhorizons@ *Mediterranean, Baltic, Alaska, Caribbean, California were included in the study

Color Line Deploys DTA Color Line AS is one of Europe’s leading cruise and transport shipping companies, with their first DTA installation on SuperSpeed 2, which operates twice daily between Norway and Denmark.

“We believe in Eniram DTA’s display of actual and potential fuel saving as an efficient way to minimize fuel and power needs for the voyage.” Helge Pile Project Director, Color Line AS. The SuperSpeed 2 is a RoPax vessel capable of transporting 1900 passengers, 764 cars or 117 trucks.

Maran Tankers strengthen existing energy efficiency initiatives with DTA

Employee Spotlight: Esa Ylinen Esa started his career working with both diesel and electrically powered trains and later moved into marine transport. He worked ten years as head of the electrical design department at a major shipyard in Helsinki and has spent many years working on the development of ship systems. He has a Masters Degree in

Automation Design specialising in electrical machines and power electronics at the Helsinki University of Technology. Esa applies his expertise in energy efficiency of ship systems at Eniram and is currently working on new products and areas related to energy efficiency and environment. During the summer Esa enjoys sailing in the Finnish archipelago and in the winter plays floorball which is a type of indoor floor hockey and a popular game in Nordic countries.

Maran Tankers Management Inc., the single biggest tanker operator in Greece, has started the first installation of the Dynamic Trimming Assistant (DTA) on their VLCC vessel, Maran Canopus.

“With the installation of DTA onboard Maran Canopus we hope to achieve a fuel saving of between 2 and 4%. This could translate into US$200-400K savings in fuel per calendar year, as well as significant reduction in air emissions.” Mr Miltiades Sfantsikopoulos, |


Eniram’s Newsletter Issue 2 | May 2011

FAQs: Ask the Experts Q: What vessel types have Eniram so far performed installations on? A: Over the past few years, DTA (the Dynamic Trimming Assistant) has been installed on a range of vessel types including container vessels, tankers, cruise ships, RoRo and Ropax vessels. We are also beginning the installation of our first bulk carrier this month.

Q. How useful is the DTA tool for RoRo vessels running 7 hour passages for example? A: RoRo with 7 hours passage is optimal as you have long enough sailing times, you have also multiple loadings and different drafts for the vessel. The shortest passage times

currently are less than 3 hours and we have seen operators get good savings here too. Average savings for our customers is between 2 -3%.

Q: What is the typical return on investment for DTA? A: This varies, depending on vessel type, as well as journey type and length. However, taking an overall mean of past installations, the average payback is close to seven months.

Q: Can you quantify the carbon reduction as a consequence of using your technology? If so, how is this done? A: Yes, we can. We can calculate the reduction in propulsion

energy caused by our technology, which enables us to calculate the consequential reduction in fuel consumption. These figures are thus comparable to a certain reduction in CO2 emissions.

Answers to these questions and others are available at

If you have any unanswered questions, please email them to greenhorizons@

Company News Eniram expands International Presence with new Office in Singapore Singapore was chosen by Eniram as it is clearly one of the premier global hubs for shipping and is home to over 4000 maritime companies. Located in the huge Suntec City complex, the new office will provide a base for local and regional sales and support services for the whole of the Asia Pacific region.

Eniram Joins Green Marine Green Marine (GM) is a joint volunteer project between the USA and Canada which helps the marine industry surpass their green objectives through introducing targets, technologies and best practices. In February, Eniram became a supporting partner of the Green Marine initiative. Come and see us at the Green Marine annual conference, Green Tech, on 25-26th May, Fairmont Chicago Millenium Park Hotel.

Eniram and ABB to Increase Vessel Efficiency for Azipod Systems Eniram has announced an agreement with ABB to integrate Eniram pod optimization technology into the ABB Azipod propulsion system. Based on Eniram’s Vessel Management System (VMS), the technology optimizes the relation of the Azipod angles, and thus allows for increases in fuel savings.

Green Horizons is published by Eniram Oy, Itälahdenkatu 22a, FI-00210 Helsinki, Finland Subscribe to Green Horizons just send an email with your details to: Newsletter Editor: Jessica Davies For comments, queries or stories, please e-mail:

5 |

This magazine is printed on recycled paper

UK +44 118 927 2872 | Finland +358 10 843 3800 | USA +1 954 681 4320 | Singapore +65 9460 2319

Finally: Eniram in Numbers

180,000 100% Eniram’s Compound Annual Growth Rate (CAGR) since 2008

The tonnes of CO2 Eniram is helping its customers to save annually

$18m 53 The amount Eniram is helping its customers to save in 12 months

Industry News: Handpicked articles & reports

The number of Eniram employees as at the start of 2011

Calculate fuel & CO2 emissions reductions

Shipping, World Trade and the Reduction of CO2 Emissions Online Brochure

Our fuel savings calculator is a new tool that enables ship owners and operators to calculate how much they could save on fuel by installing Dynamic Trimming Assistant (DTA) onto their vessel(s). Enter your vessel type, operating and fuel consumption information and the calculator will estimate fuel savings* per year, total payback time and subsequent carbon emissions reduction broken down into CO2, NOx and SOx.

This guide from the International Chamber of Shipping gives an overview of the current global shipping situation, as well as an overview of how CO2 emissions can be reduced in the industry.

To calculate fuel savings for a particular vessel visit www.eniram. fi/savefuel

Download here:

*Figures are indicative and are based on typical specs for each vessel type

Ship Efficiency: The Guide Contains a comprehensive guide on ship efficiency technologies and measures. All known ship efficiency technologies for fuel and emission mitigating measures like voyage optimisation, scrubbers, anti-fouling and waste heat recovery systems are outlined in one booklet. The guide retails at €395 but we can offer you at 20% discount if you email and mention Green Horizons. Further information here:

Forthcoming Events Eniram is attending various events throughout this quarter, come and find us at any of the events listed:

33rd Motorship Propulsions & Emissions Conference www. Copenhagen, 11-12th May 2011 Eniram will be presenting “Onboard propulsion power decomposition to achieve energy efficient operations” Norshipping norshipping-2011 Oslo, Norway; 24-27th May 2011 Did you find your free invitation and flyer with this newsletter? If not email us at

Come and meet the Eniram team who will be exhibiting at this event in Hall D, stand D05-22. Green Tech 2011 Chicago, USA; 25-26th May 2011 Nautical Consultant at Eniram, Visa Roine will be presenting - Quantifying energy performance to drive environmental improvements across the fleet. |


Green Horizons, Issue 2  

Eniram sends out regularly a complimentary newsletter, ‘Green Horizons', giving an insight into the latest technological developments in the...

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