4th International Symposium of Maritime Safety , Security & Environmental Protection...

4th International Symposium of Maritime Safety, Security & Environmental Protection

Athens 30-31 May 2013

EEDI ASSESSMENT OF RECENTLY BUILT TANKERS IN TURKEY

Eda Turan & Yasin ÜstYıldız Technical University, Faculty of Naval Architecture and Maritime, Naval

Architecture and Marine Engineering Department, 34349, Yıldız, Istanbul, TURKIYE

CONTENTS

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• What’s aimed?

• Sustainability

• Comparison of Transportation Modes

• What’s EEDI (Energy Efficiency Design Index)?

• Results of The Analysis

• Conclusion

What’s aimed?

• Calculation of EEDI Values of 84 tankers and comparison with the reference values

• DWT<25000 tons

• Built in Turkish Shipyard

• Year of Built: Btw 2009&2012

.

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Methodology

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Methodology:

• Investigation of the design data for tankers.

• Calculation of EEDI values.

• Finally, comparison of their attained EEDI values against the values of the EEDI baseline as designated for tankers.

Sustainability

• In recent years, sustainability and environmental protection are the core concern of industries.

• In this context, there are new regulations in the shipping industry. These are;

• Energy Efficiency Design Index (EEDI)• Energy Efficiency Operational Indicator (EEOI) • Ship Efficiency Management Plan (SEEMP) etc.

Our study is examined in the scope of EEDI.

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Comparison of Transportation Modes

• Although international shipping supports about 90% of the world trade, its exhaust emissions are less than those associated with other modes of transport

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New Trends in the Recent Years

• Reduction of exhaust emissions from ships is also compatible with lower fuel consumption.

• In order for lower fuel consumption and greenhouse gases rates; some alternatives are;

• Efficient main engines, • Optimization of propulsion systems, • Application of low friction hull coatings, etc.

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New Trends in the Recent Years

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New Trends in the Recent Years

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What’s EEDI ?(Energy Efficiency Design Index)

• The EEDI was adopted as a mandatory (technical) measure by the Marine Environment Protection Committee (MEPC) of IMO at its 62nd session on July, 2011 and guidelines on the method of calculation of attained EEDI were agreed at its 63rd session in early 2012 (MEPC, 2012).

• All ships larger than 400 gt of a specific type and size range which are to be built during 2015-19 should be up to 10% more efficient, up to 20% more efficient for the 2020-24 new buildings and up to 30% more efficient from 2025 onwards.

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Why EEDI ?(Energy Efficiency Design Index)

• In order to contribute further into the influence of the EEDI adoption upon future newbuildings and provide an indication of the design adaptation requirements towards future EEDI compliance, the current newbuilding status has been examined.

• The case of recently delivered tankers by Turkish shipyards is selected to constitute a suitable reference in meeting this objective.

• The conformity of existing designs with the new regulation has been investigated for illustration purposes in order to take precautions for adopting EEDI methodology to new designs

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EEDI Expression

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EEDI is expressed as;

EEDI = (Impact to the environment / Benefit for the society) = (Ship CO2 emissions / Performed work)

The variation of attained and referenced EEDI values with respect to capacity, speed, main engine power and length of tankers is shown in Figs. respectively

The EEDI provides a specific figure for an individual ship design, expressed in grams of carbon dioxide (CO2) per ship’s capacity-mile (the smaller the EEDI the more energy efficient ship design) and is calculated by a formula based on the technical design parameters for a given ship.

Results of The Analysis

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• EEDI value is decreasing exponentially with the increase of capacity.

• Tankers smaller than 10000 DWT has considerably bigger index values than for the bigger ships and a sharp decrease has been observed in this range.

Results of The Anaylsis

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• EEDI value is decreasing linearly with the increase of speed.

Results of The Anaylsis

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• EEDI value is decreasing exponentially with the increase of length between perpendiculars.

Results of The Anaylsis

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• EEDI value is decreasing exponentially with the increase of main engine power.

• Comparison of attained and referenced EEDI:

- Attained EEDI value is bigger than referenced EEDI value for all values of ship’s capacity, speed, and length. - The attained EEDI value is lower than the referenced EEDI value up to the main engine power of 2000 kW, whereas it is higher for main engine power in excess of 2000 kW with reference to tankers without power take-off.

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As a conclusion; existing ships do not meet the EEDI criteria since obtained EEDI value should be smaller than the reference value and the development of future ship designs is not only necessary but it will be challenging too.

Reduce the amount of transportation? Affect Sea Trade

How to reduce CO2 Emissions?

Technical + OperationalImprove Efficiency =

Thanks for your attention

edaturan@yildiz.edu.trYildiz Technical University, Istanbul