22 - Danny Shorten

7/29/2019 22 - Danny Shorten

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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 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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FOBAS Engine

Scrape Down Oil


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FOBAS Engine

Scrape Down Oil


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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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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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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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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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Calcium deposit causingbore polishing

Abrasion of piston skirtagainst the liner wall.


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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

Ll d R i t M i


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66 hrs later in

Singapore

Piston Overhauled

in Hong Kong

MAN B&W 12 K90MC



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Lloyd s Register: Marine

Faulty injection & Combustion

` Sulzer 10RTA96C

Injector

` Poor atomisation. Injection and combustion abnormalities identified.



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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.



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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

Documents

22 - Danny Shorten