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Energy Saving – The Ship Owner’s Perspective
Sean Crowley
Electrical & Automation Manager, Technical Department
Stolt Tankers BV
Energy Efficiency in Vessel Operations Conference
11th Annual Digital Ship Scandinavia
5th & 6th March 2014
Page 2 Strictly Private and Confidential and Not for Distribution
Agenda
• Brief Overview of Stolt-Nielsen Limited, Stolt Tankers and StolthavenTerminals
• Stolt-Nielsen Environmental Policy
• Why are we here? The Ship Owner’s Perspective...
• Why energy management?
• Plan
• Do
• Check
• Act
• Questions
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Stolt-Nielsen Limited Overview
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Environmental
• Stolt-Nielsen Ship Owning’s mission is to provide its customers with thesafest, most reliable and most environmentally friendly bulk-liquidtransportation services in the world.
• Reducing CO2, NOx and SOx emissions through increased efficiency isone of the key objectives of Stolt Tankers’ Energy Management Project—an ongoing effort launched in 2006 to improve the energy efficiency of theexisting Stolt fleet.
• Actions include:
Travelling specialists analyse ship performance and provide best-practice guidelinesto crews.
Smoothing hulls and propellers.
Optimising voyage planning.
Power management and frequency converters.
• Designing innovative parcel tankers that will deliver substantial long-termfuel efficiencies.
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The ship owner’s perspective…
• Rising fuel prices and impending environmental regulations put pressure
on ship owners to operate more efficiently.
– EEDI (Energy Efficiency Design Index)
– SEEMP (Ship Energy Efficiency Management Plan)
• Studies show that 60% – 70% of ship-operating costs go on fuel.
• Going Green is good for the ship owner and good for the environment.
• Fuel measurement and performance analysis are key tools to manage
voyage costs and thus profitability.
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Why energy management?
Drivers:
• Rising energy prices
• Compliance (future) emission regulation
• Corporate social responsibility
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Rising energy prices…
Crude vs. Fuel, 2005 - 2011
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Marpol Annex IV - Emission control areas
North American Coasts ECA-SOx
from August 1, 2012
Baltic and North Sea
ECA-SOx
US Caribbean ECA-SOx
from January 1, 2014
North American & US Caribbean
ECAs will also be ECA-NOx
from 2016
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Marpol Annex IV - Upcoming emission regulation
• From 2016 new regulations will
come into force with regard to
NOx emissions.
• January 2015 new sulphur
emissions regulation come into
force for emission control areas.
• January 2020 new sulphur
emissions regulation come into
force world wide.
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How to manage energy consumption?
Energy management is controlled primarily through careful ship operation
and management, which requires the personal commitment of everyone
involved in the above tasks. To be successful, energy efficiency and energy
conservation must become a way of life.
Within Stolt Tankers an ISO 14001 environmental management system has
been implemented. Energy conservation plays an integral role in the ISO
14001 system and is documented in appendix 10 of the Environmental
management manual.
The system works following a PDCA cycle: Plan
Do Check
Act
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Plan: Which areas affect energy consumption?
Hull
Propeller
Steam & Engine
Tank Cleaning
Trim
Autopilot
• Performance Management
• Weather Routing
• Voyage & Bunker Planning
Fuel & Sludge Treatment
Ballast
Resources
Cooling Systems
Turbocharger
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Do: Upgrade systems
• Ships systems are normally
designed for a sea water
temperature of 36 degrees Celsius
and full engine load, but only a
limited amount of time are vessels
sailing on such conditions.
• This means that there can be
savings by optimizing the cooling
water system. For example, by
installing frequency controllers on
seawater pumps.
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Do: What are Variable Speed Drives (VSD)?
• A VSD is a microprocessor system for controlling AC electric motors.
• A VSD controls the speed, torque, direction and resulting horsepower of a motor.
• Variable Speed Drives can be used in many applications from the main
propulsion to the bow.
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Do: How do Variable Speed Drives save fuel?
• Drives adjust the speed of electric motors to match the demand of the application,
typically reducing motor energy consumption by 20-to-50 percent.
• When traditional control methods are used—such as dampers, vanes or valves—the motor
runs at full speed and the flow of the output is mechanically restricted.
• Normal design criteria set to meet the most unfavorable conditions. Everyday operation
rarely comes close to such conditions.
• In many cases these pumps are over dimensioned in order to handle any situation, e.g.
fluctuations in seawater and ambient temperature.
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Do: What is a Power Management System (PMS)?
• A power management is an automation system for electric power
generation and distribution.
• The PMS controls the power system in order to prevent blackouts and
minimize fuel consumption.
• Common features of a PMS:
Engine Control Functions (start/stop sequences including cooling-down period) Automatic Load Dependent Start/Stop Automatic Load Sharing Start Priority Selection Frequency Control Blackout Recovery Heavy Consumer Control Generator Protection
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Do: How can a PMS save money?
• A PMS starts and stops the diesel generators based on actual load
demand, without relying on manual intervention.
• Instead of having a standard cooling-down period, an advanced PMS
can incorporate cooling water and lube oil temperatures so idle running
hours are reduced.
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Do: Voyage planning
Swedish Meteorological and Hydrological Institute (SMHI) has been
contracted to provide weather routing services for the entire fleet, ensuring
that an optimal route is sailed. Software tracks performance.
Vessel data input
Vesslink
IMOS
Bassnet
SMHI
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Do: Hull performance
Hull and propeller fouling can have a huge impact on the energy
consumption of a vessel. As per ISO 14001 system, procedures are in
place to control hull fouling.
• Propellers are polished on fixed intervals
• Hulls are cleaned based on condition
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Do: Hull performance
Impact on heavy running propeller / fouled hull is the difference between
the expected speed and the observed speed. By closely measuring hull
performance hull and propeller fouling interval can be determined.
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Check: The challenges of measurement
• Of all our initiatives, measurement is the most challenging—almost
impossible to measure factors with ≤3% effect.
• Hence, difficult to justify expensive capital investments.
• Many solutions claim potential high give-or-take savings…that
would be nice, but…who takes the risk?
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• Accurate data on fuel consumption and reduction measures is the
basis for any energy management policy.
• Automated systems gather data from the ships’ systems and
sensors without increasing the workload of ships’ staff.
• Enables integration with overall ship management solutions, such
as BASSnet.
Check: Measurement starts with data collection
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Check: Example of poor measurement
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Check: Example of good measurement
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Check: Recording device - Maris Log 4000
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ACT: Oil-fired boiler optimization - findings
• Fuel and Air Ratios - Not optimized for lowest FO consumption.They are normally set for too much air compared to the fuel.
•Maintenance of burner’s equipment (including nozzles,swirlers, burner throats, vents and linkage) – Poormaintenance can cause burned tubes and higher FOconsumption.
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Thank You.
• On behalf of Stolt Tankers, I want to thank Digital Ship and Cathy Hodge for inviting me
to speak at the conference today and arranging the new Vessel Efficiency & Fuel
Management Module
• Marlink and the other sponsors of this event.
• Members of Fleet Support and Newbuilding Departments, Stolt Tankers B.V.
• Stolt Energy Conservation Manager Sander Woltheus.
• To you, conference attendees, for listening to me...
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Questions?