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PROVEN TECHNOLOGY DESMI OptiSave™ Optimizing Pump Speed to Current Conditions Saving Fuel
PROVEN TECHNOLOGY
DESMI OptiSave™
Optimizing Pump Speed to Current Conditions Saving Fuel
2
OPTISAVETM
ENERGY EFFICIENCY
SAVING TONS OF FUEL OIL
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DESMI OptiSaveTM
There is an ever-present need for all vessel operators to better equip and adapt themselves to future developments in marine trading.
DESMI OptiSaveTM is a step in the right direction.
OptiSaveTM complies with EEDI, SEEMP and IMO rules.
Energy efficiency and fuel savings in compliance with IMO, SEEMP and EEDI
IMO has specified that the world fleet has to reduce CO2
emissions by 180 million tons by 2020. This is equal to
savings on an average of 285 tons of CO2 or the same as
110 tons of fuel oil per vessel.
If you install OptiSaveTM in your ships’ seawater system
you will save approx. 70 tons of fuel oil per year (average
value per vessel) which corresponds to 64% of the CO2
emission stipulated by IMO.
If you install OptiSaveTM in the fresh-water system as well,
the savings will be up to 140 tons of fuel oil, corresponding
to 128% (average per vessel).
Finally, if you also install the OptiSaveTM in your engine
room fan system, the savings will be around 210 tons of
fuel oil, in total 192% of the CO2 emission stipulated by
IMO.
Customer says!
“The five ships, in which OptiSaveTM has been installed,
have all met the foreseen savings. We have saved 40,000
EUR/year per vessel.”
Carsten Routhe Johansen, Lauritsen Kosan
You can save millions of tons of fuel oil using OptiSaveTM
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Seawater Cooling Pumps Control.
All implemented DESMI OptiSave™ solutions have shown
that the relatively inexpensive installations have an average
payback time of less than one year. And the fact that the
installed components have an expected lifetime of ten
years or more means that you will see your investment
returned to you many times.
With OptiSaveTM we guarantee the most efficient solution,
where energy efficiency and fuel savings are key benefits.
The systems that are directly applicable with DESMI
OptiSave™ include:
• Seawater cooling systems
• Fresh-water cooling systems
• Engine room ventilation
or any combinations of the above.
New Building version:
The New Building version of the OptiSaveTM is designed for
new vessels. The concept has a basic control platform and
is customised from project to project.
Retrofit version:
The Retrofit version of the OptiSaveTM is designed for easy
and fast installation. The concept is modular and can be
customised, also for ethernet and modbus communications.
The existing automation installation (start/stop/standby
function) and the interface to existing automation system
will be kept.
All OptiSaveTM systems are based on the same automation
platform and can be integrated with the Automation
Management System (AMS) of the vessel.
E-motor data: 2x45kW
Power consumption without OptiSaveTM 349.872 kWh
Power consumption with OptiSaveTM 85.451 kWh
Power saving 264.421 kWh
Power saving in % 75,5
OptiSaveTM in operation since August 2012
Tessa Kosan - April 2013
The OptiSave™ solution
The many benefits of DESMI OptiSave™
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The purpose of the system is to control the seawater
cooling pumps to the actual cooling demand at any time
by reducing/increasing pump(s)’ speed according to the
actually needed cooling capacity.
Furthermore, the system is to be integrated with the ship’s
sequential start system and may be prepared for the
controlling of priming ejectors in case one of the seawater
cooling pumps is used as emergency bilge pump.
OptiSaveTM is an intelligent system which operates the
speed of the pumps, taking the following conditions into
consideration:
• SW temperatures outlet max. 48oC
• Temperature of electric motores of CSW are monitored
• Pressure drop across coolers are monitored
• Flow through coolers are increased to 100%. 1 hour per
24 hours to reduce sediments in the coolers
The system layout corresponds to minimum class
requirements, and therefore OptiSave™ is designed for
basic systems.
Each pump has its own individually mounted Variable
Speed Drive (VSD) for pump speed/flow regulation.
Seawater Cooling Pumps Control.
Tessa Kosan - April 2013
OptiSaveTM for the Seawater System
The OptiSave™ solution
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Engine Room Fan Control
OptiSaveTM for the Fresh Water System
The purpose of the system is to control the LT/FW Cooling
water pumps to the actual cooling demand at any time
by reducing/increasing pump(s)’ speed according to the
actually needed cooling capacity.
Furthermore, the system is to be integrated with the ship’s
sequential start system.
The system layout corresponds to minimum class
requirements, and therefore the OptiSave™ is designed for
basic systems.
Each pump has its own individually mounted Variable
Speed Drive (VSD) for pump speed/flow regulation. On
the electric of each individual pump motor there will be
a PT100 sensor built-in. This sensor is fitted by the motor
manufacturer for motor condition monitoring to prevent
possible motor overheating.
Each individual FW/LT Cooling Water pump has to be
connected to its own VSD. And each VSD is coupled to the
OptiSave™ Control Panel which in turn is being fed with
process information from the system’s temperature and
pressure transmitters.
LT/FW Cooling Water Pumps Control
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The purpose of the system is to control E/R fans to the
actual conditions by reducing/increasing fan speed
according to the actually needed airflow.
Furthermore, the system is to be integrated with the ship’s
CO2 release system, fire alarm system and also with the
ship’s emergency stop system for fans.
This will necessitate the use of a remotely controlled
damper which has to be equipped with spring return and
to be arranged in such a way that fans are interlocked with
the attached fire dampers.
One of the fans has to be connected to the ship’s
emergency switchboard and to be arranged/installed in
such way that this fan can act as CO2 exhaust fan.
All E/R fans are to be equipped with automatic dampers
incl. exhaust dampers in funnel/casing.
The OptiSaveTM system will work on a combination of power
signal from the fuel index transmitter of the main engines
and one differential pressure transmitter measuring static
over-pressure in the Engine Room (E/R). At the same
time the system ensures that ambient temperature in the
engine room is maintained at a given set point, however
max. temperature to be 45o C.
Engine Room Fan Control
OptiSaveTM for the Engine Room System
LT/FW Cooling Water Pumps Control
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Download
Name
Displacement
Ice ClassN/A
IMO No.:
Sup typeCSR Design
Breadth [m]
Lpp [m]
Type
Draught [m]
Crane reach [m]
Max. Capacity
DWT [ton]
LWTCSR
Deadweight [T]
Crane SWL [T]
DWT reference design
Cubic capacity
# of cranes
Shaft Motor
MCR [kW]SFC [g/kWh]
Shaft limit
kW
Motor hLimited by ME shaft
no.1.
170,0
no.1.
0,97
no.2.
no.2.
no.3.
no.4.
Fuel type Diesel/Gas O
il, ISO 8217, DMC - D
MX
kW
f eff
0,50
1,00
MCR [kW]SFC [g/kWh]
Generator h
no.1.
185,0
0,93
no.2.
0 kW
no.3.
0 ton (m)
no.4.
no.5.
Knots
Fuel type Diesel/Gas O
il, ISO 8217, DMC - D
MX
kW
SG installed
Phase 1: 1 Jan 2015 – 31 Dec 2019
no.1.
Calculation option
no.2.
Version 1.40
Calculation ref: 294685
The information and results expressed by the BIMCO EEDI Calculator constitute an im
plementation of IMO MEPC.1/Circ.681,
amended by WP.9 of MEPC 63 in March 2012, by MEPC 65/4/4 on inclusion of Ro-Ro cargo and passenger ships as well as by MEPC
65/4/5 on correction of EEDI for General Cargo Ship, and are subject to
change without notice. The information and results
expressed by the Calculator have been formed in good faith on the basis of the best in
formation available at the tim
e of
implementation from sources believed to be reliable, but no warranty, express or im
plied, is made as to its accuracy, completeness
or correctness. BIMCO accept no liability arising out of or in
connection with the results of the Calculator and you are advised that
any usage is at your own risk. In
particular, th
e results should not be construed as certified, le
gal or otherwise.
Shaft Generator
Reference speed
@ Index Condition
Mandatory field
Optional field
Innovative energy efficiency technology
Ignored field
EEDI Calculator
Delivery date
Ship details
Propulsion power:
Deadweight:Index Conditio
n
Your calculator is
up to date
Main Engine(s)
Auxiliary Engine(s)
Mechanical
Electrical
Corrections
page 1/1 02-09-2013
OptiSaveTM helps ship owners and designers to meet the
requirement for reduction of C02 stipulated in IMO MEPC
62 rules. OptiSaveTM is designed to be integrated in new-
build and retrofit applications and can be fully integrated
into the overall Control System.
Energy Efficiency Design Index (EEDI)
The EEDI for new ships aims at promoting the use of more
energy efficient (less polluting) equipment and engines.
The level is to be tightened every five years, and so the
EEDI is expected to stimulate continued innovation and
technical development of all the components influencing
the fuel efficiency of a ship right from its design phase.
The EEDI requires a minimum energy efficiency level of
CO2 emissions per capacity mile for different ship types
and size segments. Divided over four phases, the level will
be tightened over time. Emission reduction factors are set
until 2025 when a 30% reduction is mandated over the
average efficiency for ships built between 1999 and 2009.
The EEDI has been developed for the largest and most
energy intensive segments of the world’s merchant fleet
and will cover 72% of emissions from new oil and gas
tankers, bulk carriers, general cargo, refrigerated cargo
and container ships.
Energy Efficiency Design Index
(EEDI) and SEEMP
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Download
Name
Displacement
Ice ClassN/A
IMO No.:
Sup typeCSR Design
Breadth [m]
Lpp [m]
Type
Draught [m]
Crane reach [m]
Max. Capacity
DWT [ton]
LWTCSR
Deadweight [T]
Crane SWL [T]
DWT reference design
Cubic capacity
# of cranes
Shaft Motor
MCR [kW]SFC [g/kWh]
Shaft limit
kW
Motor hLimited by ME shaft
no.1.
170,0
no.1.
0,97
no.2.
no.2.
no.3.
no.4.
Fuel type Diesel/Gas O
il, ISO 8217, DMC - D
MX
kW
f eff
0,50
1,00
MCR [kW]SFC [g/kWh]
Generator h
no.1.
185,0
0,93
no.2.
0 kW
no.3.
0 ton (m)
no.4.
no.5.
Knots
Fuel type Diesel/Gas O
il, ISO 8217, DMC - D
MX
kW
SG installed
Phase 1: 1 Jan 2015 – 31 Dec 2019
no.1.
Calculation option
no.2.
Version 1.40
Calculation ref: 294685
The information and results expressed by the BIMCO EEDI Calculator constitute an im
plementation of IMO MEPC.1/Circ.681,
amended by WP.9 of MEPC 63 in March 2012, by MEPC 65/4/4 on inclusion of Ro-Ro cargo and passenger ships as well as by MEPC
65/4/5 on correction of EEDI for General Cargo Ship, and are subject to
change without notice. The information and results
expressed by the Calculator have been formed in good faith on the basis of the best in
formation available at the tim
e of
implementation from sources believed to be reliable, but no warranty, express or im
plied, is made as to its accuracy, completeness
or correctness. BIMCO accept no liability arising out of or in
connection with the results of the Calculator and you are advised that
any usage is at your own risk. In
particular, th
e results should not be construed as certified, le
gal or otherwise.
Shaft Generator
Reference speed
@ Index Condition
Mandatory field
Optional field
Innovative energy efficiency technology
Ignored field
EEDI Calculator
Delivery date
Ship details
Propulsion power:
Deadweight:Index Conditio
n
Your calculator is
up to date
Main Engine(s)
Auxiliary Engine(s)
Mechanical
Electrical
Corrections
page 1/1 02-09-2013
Energy Efficiency Design Index
(EEDI) and SEEMPShip Energy Efficiency Management Plan (SEEMP)
The Ship Energy Efficiency Management Plan (SEEMP) is
an operational measure that improves the energy efficiency
of a ship in a cost-effective manner.
From 2013 onwards the SEEMP urges owners and operators
of existing ships to review and consider operational
practices and technology upgrades at each stage of the
operation of a ship to optimise the energy efficiency
performance.
EEDI technical measures will have a significant long-term
effect while SEEMP operational measures will have an
effect mostly medium term.
The many benefits of DESMI OptiSaveTM
Energy saving up to 80%
Short return on investment
Prolonged lifetime of pumps due to less wear and tear
Minimum changes in existing electrical installations
Proven technology
Proven savings
Reduced OPEX
Worldwide service support
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Equipped for the future
When the required cooling is lower than the design criteria,
OptiSave™ automatically reduces the power consumption
of the seawater cooling pumps. This situation occurs
when the seawater temperature is lower than 32°C and/or
the main engine is operated at reduced load.
It is the fact that only in limited areas in the seas around the
world and within certain seasons does the sea temperature
ever get this high. This means that sea going vessels are
frequently designed with significant over-capacity built
into the cooling systems.
Given the over-capacity with the limited ability to regulate
the pumps via on/off control and static orifices, DESMI
decided to develop an energy optimization system for
the marine industry. The DESMI OptiSave™ solution was
conceived.
Over-sizing and safety margins
Over-sizing is an issue which is unfortunately found in more
areas within seawater cooling systems - not only in pumps.
This often happens in the initial design stage and where
ship designers, component suppliers and also yards, even
vessel owners and operators, add to the increased system
capacity.
The inherent problem of over-sizing is due to the
application of safety margins in all aspects of ship
construction. This degree of over-engineering is inevitable
and cannot be deviated from, if vessels are to maintain
their global trading capability. As DESMI recognizes the
constraints that the ship owners, designers and shipyards
are bound to, we utilize the DESMI OptiSave™ solution to
optimize what you already have, at a minimum expense,
with maximum benefit.
The OptiSave™ system is a powerful tool for energy optimization in real world applications.
A complete package comprising initial feasibility study, design consultancy, installation, commissioning, financing,
crew training and worldwide service.
Average Sea Surface Temperature
30 - 260 26 - 220 22 - 180 18 - 140 14 - 100 10 - 60 6 - 00
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The OptiSave™ system is a powerful tool for energy optimization in real world applications.
Financing
DESMI offers a financing concept where the ship owners
pay for the OptiSaveTM system with the fuel savings in a
period of max. two years. Please contact DESMI for further
information.
Options available
On account of the highly customizable nature of the
OptiSave™ solution there is a variety of options to choose
from in addition to the standard package:
Interface Protocols
The OptiSave™ solution has a wide range of options with
regard to interface protocols to connect to the vessel‘s
Automation Management System (AMS).
Data Export
In addition to this package, OptiSave™ has the option of
being linked wirelessly to an onshore database to which
the system automatically exports information from all the
systems connected to the OptiSave™ solution.
HMI (Touch screen)
As an option OptiSaveTM offers the opportunity for an
extra HMI on the bridge or in the control room.
Valves
Especially in relation to seawater cooling systems, DESMI
OptiSave™ is able to introduce controllable valves in a variety
of configurations.
If your system contains 3-way valves, DESMI OptiSave™ can
be configured to also monitor and control these valves.
Backflush
A backflush program can be provided in the OptiSaveTM
management.
This means that water will be pumped at full speed 50/60 Hz
through the coolers (back blush pipe is required).
A complete package comprising initial feasibility study, design consultancy, installation, commissioning, financing,
crew training and worldwide service.
What to expect?
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www.desmi.com
You can read more about our pump solutions at www.desmi.com or contact us by phone: +45 96 32 81 11
A number of OptiSaveTM references:
