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Lloyds Register: Marine
DANNY SHORTEN IENG
45, Husband, Father, Bass Guitarist, Cook
Craft Apprenticed, Mechanical Engineer, BTEC HND 1985.
1981 1999 Lubricants Company - Field support testing and
engineering industrial lubricants, condition monitoring andservice products.
1999 2010 Lloyds Register of Shipping Marine and offshoresystems oil analysis, Condition Based Maintenance, Condition
Monitoring large marine engines.
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Lloyds Register: Marine
Lloyds Register Condition Monitoring Guide Published 2010
Marine Machinery Condition Monitoring A training standardfor practitioners http://www.bindt.org/COMADIT/CM_Certification.htmlMeets ISO 18436 and MNTB requirements
ISO TC108 SC5 Condition Monitoring -
UK Representative Marine
CIMAC Large Engine Lubrication Group Member
CEC - Large engine lubricant test methods development
Currently responsible for FOBAS Engine delivery and
technical support re: CBM for classification group.
http://www.bindt.org/COMADIT/CM_Certification.htmlhttp://www.bindt.org/COMADIT/CM_Certification.html -
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A new approach to engine performance analysis
1.Diagnoses based upon cylinder drain oil analysis pros and cons
2.What can integrated fluid analysis techniques actually tell us?
3.What can the ship manager, superintendent and chief engineer expect
to gain from this approach?
4.The importance of creating a functional enterprise between internal
operations and external consultancy support
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Consultancy services
http://www.lr.org/sectors/marine/Services/Consultancy/FOBAS/
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FOBAS Engine
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Slow Speed 2st Engines
Two lubrication Systems
1 - Cylinder Oil
2 - System or Crankcase
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FOBAS ENGINE
Sources of piston ring / liner wear
Targeting minor combustion issues is the most effective way to improve engine reliability
Data Source
Optimisation of 2 stroke engine performance
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CLO Drain
CLO Feed
Sampling
Point
Combustion Quality
Wear ConditionAdequacy of Feed
Condition of Stuffing Box
Water Contamination
Cylinder Drain Oil contains
useful information about:
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Lloyds Register: Marine
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FOBAS Engine
Scrape Down Oil
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Lloyds Register: Marine
FOBAS Engine
Scrape Down Oil
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Lloyds Register: Marine
F
time
P = Point where failure indicatorcan be measured
F = Point where failure occurs
PF Curve
Ma
chinecondition
P
FOBAS Engine
Scrape down analysis and
other forms ofmonitoring means
Less machinery
deterioration
Greater time to react
and repair
Increased sensitivity to emerging conditions
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Lloyds Register: Marine
FOBAS Engine
We receive some performance measurements from the engine:
Standard engine performance data Temperatures/Pressures
Scavenge air temperatures
Fuel line temperatures and Viscotherm settings
Shop Test Data
Fuel Before Purifier & Engine
Cylinder Lubricating Oil (New)
System oil (New) and in service samples
Cylinder Drain Oil (Scrape down oil) x X Cylinders
And generate a comprehensive report on the condition of the engine
Cylinder Wear and Combustion Performance
CLO Feed Rate
Fuel Purifier Performance
Etc.
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Lloyds Register: Marine
FOBAS ENGINE - Some of the result areas
PerformancePower Balance - Pmax
Power Balance - Ptdc
Power Balance - Pmax-Ptdc
Power Balance - MIPPower Balance - Exhaust
Temperature
VIT & Fuel Pump
Shop Test - Load Indic.
Shop Test - Pmax
Shop Test - Ptdc
Shop Test - Pmax-Ptdc
Shop Test - MIP
Shop Test - TexhShop Test T/C RPM
Shop Test - Pscav
Shop Test - Engine RPM
CombustionCombustion Stability
Late Combustion
Early Combustion
Acid CondensationBurning Lubricant
Check Injectors
Inspect Pistons
FuelISO Comparison
Representative
Cat-fines
Water
Sea Water
Acid Condensation
Vanadium
Na:V Ratio
MCR
Temperature
Purifiers
Turbo ChargerAfter Cooler
In Air Receiver
Performance
WearCylinders Running In
Liner Max Wear
Liner Wear Rate
Combustion - depositsPiston/Liner Abrasion
Skirt Abrasion
Stuffing Box
Cat-fines
Overall
Ring Groove
Blow By
Water
System OilDrain Contamination
Lubrication
Dispersant Reserve
Unburnt FuelWater
Wear Particles
Cylinder Drain OilSystem Oil Contamination
Fuel Oil Contamination
Alkaline Reserve
SludgeWater
Fuel Ash
Unburnt Fuel
Dilution
Dispersancy
Cat-fines
Iron
Tin
Chromium
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Lloyds Register: Marine
FOBAS ENGINE 8 Point Analysis Strategy
By individual analysis of the eight key elements
1. Fuel oil quality
2. Air cooler and scavenge air
3. Combustion performance
4. Cylinder oi l feed rate
5. Cylinder drain oil condition
6. Liner and r ing wear
7. System oil condition
8. Engine performance indicators
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Reports
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Achieving World Class Performance
With thanks to SKF Reliability - Client Needs Analysis
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Shortcut to example.pdf.lnk
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Savings Illustration
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Optimised CLO feed rateExtended cylinder overhauls
Scavenge port inspection at 31,000 hours g/kWh
FOBAS Engine
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Too much Cylinder Oil
Calcium deposit
Calcium depositcausing rings to stick
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Too much Cylinder Oil
Calcium deposit causingbore polishing
Abrasion of piston skirtagainst the liner wall.
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Lloyds Register: Marine
Too much Cylinder Oil
Calcium deposit causingbore polishing
Abrasion of piston skirtagainst the liner wall.
Ll d R i M i
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Too much Cylinder Oil - Skirt Abrasion
Deposits on thetop land cause
misalignment
Piston Skirtforced against
the liner
Deposits on piston top land will not be
concentric. More deposits wil l form in
way of f lame path
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Too much Cylinder Oil
66 hrs later in
Singapore
Piston Overhauled
in Hong Kong
MAN B&W 12 K90MC
Lloyds Register: Marine
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Faulty injection & Combustion
` Sulzer 10RTA96C
Injector
` Poor atomisation. Injection and combustion abnormalities identified.
Lloyds Register: Marine
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Fuel Oil Viscosity and Temperature
Hot Purifier roomsome distance fromthe Main Engine
Cooler engine room (especially during winter)
Extent of Temp differential depends on:
1.Engine room Temp2.Quality of fuel oil line Insulation
TemperatureDrop
Lower temperature fuel at point of injection means pooratomisation and thus poor combustion.
Lloyds Register: Marine
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Poor Combustion Means More Wear
Values exclude engines during running-in period and catastrophic failures
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Better Combustion
` Pistons become cleaner with good combustion and low feed
10,000 hours since overhaul(1.2g/bhph).
10,000 hours since overhaul(1.2g/bhph).
18,822 hours since overhaul(0.9 g/bhph)
18,822 hours since overhaul(0.9 g/bhph)
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Thanks