How to create an useful SEEMP?
CLIA Leadership Forum
Miami – 15th November 2012
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The SEEMP is a ship environmental performance management tool :
It should be developed by the owner in accordance with the IMO Guidelines* adopted at MEPC 63 in March 2012 (actually as of MEPC.1/ Circ.683).
There are four steps to consider:
Ship Energy Efficiency Management Plan
Reference MSC.203(62) – New chapter 4 to MARPOL Annex VI – Reg.22
Entry into force 01/01/2013 (new ships) – by the first IAPP intermediate or renewal survey, whichever is first, on or after 01/01/2013 for existing ships
Applicable to all new & existing ships ≥ 400gt
Planning
which determines the status of ship energy usage and the expected improvements of ship energy efficiency
Implementation
which includes the development of the procedures for energy management and the definition of the tasks to be performed
Self Evaluation & Improvement
to evaluate the effectiveness of the planned measures and of their implementation and to improve the SEEMP
Monitoring & Measurement
which provides a quantitative indicator of the ship energy effiency
* Resolution MEPC.213(63) 2012 Guidelines for the Development of a SEEMP, Adopted on 2 March 2012.
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Energy Saving Measures Ranking
Order of magnitude
Saving > 20%
10<Saving < 20%
5< Saving < 10%
2,5 < Saving < 5%
1 < Saving < 2,5%
Saving < 1%
Letter
A
B
C
D
E
F
Energy Efficiency improvement measures
Weather routing
Just in time arrival
Speed optimization
Super Slow Steaming
Optimum trim
Optimum ballast condition
Hull coating cleaning
Propeller cleaning and polishing
Engine auto-tuning
Main engine derating
Main engine variable turbo area
Use of alternative fuels
Waste Heat Recovery System
Potential energy saving
D
D
D
A
C
D
C
C+
D
E
E
B
B
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Example & Content of a SEEMP
► A SEEMP should contain the following information
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International Energy Efficiency Certificate (IEEC)
► Owner can request BV to carry out a SEEMP review and issue an IEE SoC
► The IEE SoC is an evidence that the SEEMP has been developed taking into account guidelines adopted by the Organization, in compliance with IMO MEPC.203(62) Regulation 22.2.
► The IEE SoC will allow any ship above 400 GT to obtain the IEE Certificate as soon as the required verification survey on-board has been completed, when the amendments to MARPOL VI will apply to the vessel
SEEMP Review - International Energy Efficiency Statement of Compliance
Identifying potential fuel savings
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► Voluntary approval of the Ship Energy Efficiency Management Plan of individual ships:
The Owner provides the SEEMP for initial review and approval, as well as future revisions of the plan. The Owner will also send additional documents for information.
It is proposed to evaluate the different possible measures initially suggested by the Owner and the order of magnitude of the possible gains by building an energy flow model of the ship with a simulation tool and using it to simulate the effect of the proposed measures in operating conditions defined by the Owner. It is also checked that the SEEMP is effectively implemented onboard the ships.
How to go beyond the statutory requirements
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Methodology – an holistic approach
Establishing an Energy Audits
Install instrumentation on fuel flow and shaft line power
Use of Energy simulating tools
Use of CFD calculations tools
Holistic approach: Use of Energy Management System standard
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Energy Audit
► 1. Definition of data to be measured for the energy performance assessment
► * The data are to include at least the input parameters used to calculate the performance indicators used within the scope of the SEEMP
► * The data collected/measured should include at least the following over a 6-month period
► fuel consumption per fuel type (HFO, DO…) / fuel quality (lower heating value, density) of the fuel consumed / cargo transported and distance (including under ballast)
► 2. List of fuel consumers on-board : Main engine / propulsion, Aux. engines, Aux. Boilers
► 3. List of major electrical power consumers : rotating machinery, lighting system…
► 4. List of steam consumers
► 5. Procedures and devices to measure the data
► Overall fuel/electrical power/steam consumption / fuel/electrical power consumption/steam per consumer or per consumers category, if measured / measuring devices and procedures to calibrate the devices / measurement periodicity / record-keeping procedures / person responsible for measuring and keeping records
► Verification on-board by a Surveyor
► Sampling verification that the procedures to measure the data are properly implemented and that the measuring devices are properly maintained and/or calibrated.
► Verification that the Energy Performance Indicators are calculated from the collected data over the last 6 months of the ship’s operations to assess the current energy performance status.
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Instrumentation
Propulsion monitoring
Machinery and Auxiliaries intrumentation
Prop. efficiency
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CFD calculation for potential fuel saving
Description: unsteady CFD
simulations of a rotating propeller
Outputs of the simulations:
Kt, Kq and efficiency of the
propeller in open water
Estimation of cavitation onset
risks
Example of applications:
Evaluation of propeller
performances
Evaluation Energy Saving Devices
close to propeller
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Loaded tip propeller Twisted rudder CR propeller
ACS
Energy Saving Devices (ESD) – Some outputs
Reduction in viscous pressure resistance ~2%
Fins in front of propeller Ducktail
Ship length increased
Reduction in wave resistance 2~5%
Improved efficiency 6~12% Reduction in viscous pressure resistance ~2%
Recovering of kinetic energy due to the rotational flow
SSPA 5~10%
Use of Energy Simulating Tools for Ship Energy
Modelling
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Purposes of such tool are:
Create a comprehensive energy model of a ship
Establish the energy balance and calculate the energy efficiency of the ship
Predict the fuel consumption and emissions (NOx, SOx, CO2)
Simulate and optimize the energy flows with account of the operational profiles
Energy Simulating Softwares
Management Module
Consumers
Module
System 1
Steam
System n
Fresh Water
System 2
Propulsion
…
Producers
Module
WHR
Main
Engine
Auxiliary
Engine
Boiler
Emissions
Module
NOx
SOx
CO2
Fuel Module
Fuel 1 Fuel 2 Fuel 3
Navigation
Module Operational
Profile
Ship speed
Day/Night
Summer/Winter
…
Need Emit Product
Deliver
16 Saturday,
December
1, 2012
Library Ship modeling Example of
Results
Speed profile
CO2 emissions
Fuel consumption
Library Ship modeling
Example of Results
Speed profile
CO2 emissions
Fuel consumption
Energy Efficiency Simulating Tools (SEECAT)
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Cruise Vessel Case Study
Verification with sea data and comparison between alternative systems
Main ship characteristics:
Tonnage 153000 GT
Diesel-electric propulsion
2 propulsion lines, 24 MW each
Electrical plant : 6 generating sets
Steam production : 6 exhaust gas recovery boilers and 2 oil-fired boilers
Fresh water production : 2 distillers (evaporators) and 3 reverse osmosis production units
Cooling installation: 5 chiller plants
Advanced Heat Recovery Plant – AHRP
(Co work BV + STX France)
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Timewise definition of:
Ship speed
Fresh water consumption
Type of fuel
Navigation mode
Sea water temperature
Outside air temperature
Main results:
Fuel(s) mass flow and total consumption
Mass flow and total emitted mass of CO2, NOx, SOx
Level in fresh water tanks
Case Study – Modelling & sea data
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Average DG's specific fuel consumption
0
50
100
150
200
250
300
Cruise 1 Cruise 2 Cruise 3 Cruise 4
g/K
Wh
_e
lec
Measured
Simulated
Modelling & sea data
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Thermal power balance with AHRP (winter):
Thermal power balance bis
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
0 165Time [h] - non linear
Po
we
r [k
W]
WHR boilers DG cooling Oil-fired boilers All Consumers All consumers except distillers
Design alternatives
21 Energy Efficiency Seminar – Copenhagen 2011 IGC June 17, 2010
Thank you - Any question?