lube oil treatments

7/28/2019 Lube Oil Treatments

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Rev 3.0 01/12/2010

Objectives:

To enhance the Senior Engineers awareness on theeffects and troubles of machinery on deteriorated

lube oil quality.

To be able to identify counter measures in preventingmachinery damage/failure due to deterioration oflube oil quality.

To be familiar with the different NYK manuals andguidelines relating to Lube Oil Management.


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The cost of lubricants are highly expensive. However,the loss to be incurred by the ship owner, which is

economically pervasive, is the amount of repair of aserious machinery breakdown and the loss in theoperation of the vessel that occurs due to the effect ofdeteriorated lube oil.

It is the task of the shipboard engineers with the use ofproper engine management to monitor, assess andtreat the quality of lubrication oil that will preventcertain damage to the machinery.

Introduction


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Effect of Deteriorating Lubrication Oil


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Effect of Deteriorating Lubrication Oil


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Standard Values

MAN B&W

(MES)

(HITACHI)

(KAWASAKI)

Wartsilla RTA

(DU)

(MHI)

UEC

(MHI)

(AKASAKA)

(Others)

1) KinematicViscosity

Max. cSt @ 40 C 140 145 135

Min - 15% - 15% - 10%

2) Flashpoint C PM >180

3) Water % v/v < 0.3

4)Total Acid Number mgKOH/g < +1.0

5) TBN Max mgKOH/g@KCl04

15 25 20

Min 3.0

6) Insolubles in Pentane (Method A) %m/m < 0.5

7) Insolubles in Toluene %m/m < 0.5

8) Ferrography < 50 + Trend

9) Metals

(Fe,Cu,Sn,Pb,Ni,Cr) Mg/kg < 20mg/kg + Trend

NYK Ship management Standard Values for System OilManagement for Two-Stroke Cycle Slow Speed Engines(Crosshead Type)

Comparison of Lube Oil Specification


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Standard Values

1) Kinematic Viscosity SEA 30, SEA 40 cSt @ 40 C 25%

2) Flashpoint C PM >170

3) Water % v/v < 0.3

4)Total Acid Number mgKOH/g < +1.0

5) TBN mgKOH/g@K

Cl04

> 16

6) Insolubles in Pentane (Method A) %m/m < 1.5

7) Insolubles in Toluene %m/m < 1.0

8) Ferrography < 50 + Trend

9) Metals

(Fe,Cu,Sn,Pb,Ni,Cr) Mg/kg


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Rev 3.0 01/12/2010

Lube Oil Analysis

Safety

Management

System

Manual

NYK

Shipmanagement

Co.Ltd.

Accurately monitor and assess thecondition of the lubricating oil, theengine lubricated part and the propertreatment required.

Follow the procedures stipulated in theSafety Management System Manual.


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Onboard Analysis

0

0.05

0.1

0.15

0.2

0.25

0.3

MAX MIN 09 '03 10'03

W ATER %Record the results and

compare it to theStandard Specification.

Carried-outevery month

0.8920.900--DENSITY

1627.88-TBN mgKOH/g

100.9105.571119VISCO

cst@40

0.030.07-0.3WATER %

10'0309 '03MINMAXDATE

M.V. KAGA Onboard Lube Oil Analysis Record (2003)

Main Engine

Oil Name: Taro 30 DP


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Good

Spot Test Results

Little contaminants

Indicate date and name of LubeOil and keep this as records.


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A colorless spot or a slight yellow outer ring -"good" oil.

A dense, dark deposit zone - Dispersancy failure A black, pasty zone - Glycol (Antifreeze) in your

oil

A dark center with distinct outer ring - Severely

oxidized oil A dark center with surrounding rings - Fuel in oil

Indication of Spot Test Results for Lube Oil:


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Shore Analysis

Lube Oil Sample should be sent to

designated laboratories every 3 months

or as necessary for analysis.

Always Follow NYK SMS

Manual Procedures andother related Companyinstructions.

Taking sample

1.Capacity:more than 450cc

2. Make space in the bottledue to uniformity the sample oil

before start analysis.

3. Sampling point is always same.


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Comparison of Analysis Results (Trend Analysis)

00.05

0.10.150.2

0.250.3

MAX MIN 09 '03 10'03

WATER %

70

80

90

100

110

120

MAX MIN 09 '03 10'03

VISCO cst@40

8

13

18

23

28

MAX MIN 09 '03 10'03

TBN mgKOH/g

Onboard Analysis Results Shore Analysis Results
http://localhost/var/www/apps/conversion/l.o.ref/NYKLYRA111054123.XLShttp://localhost/var/www/apps/conversion/l.o.ref/NYKLYRA111054123.XLS


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M ETAL CO NTENT

0

5

10

15

20

25

MAX

+Trend

7/14

/2003

12/7

/2003

6/14

/200

4

24/12/04

A LU

SILI

C H R

C O P

IR O

N IC

TIN

LEA

An important monitoring tool of lubricatingparts condition such as bearing, shaft, etc.,

Trend Analysis (Metal Content)


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Counter measures for Deteriorating LubricationOil Quality

High Water Content!!!High Pentane

Content!!!

Imp of checking LO analysis

MEI on LO analysis
http://localhost/var/www/apps/conversion/tmp/scratch_3/Resources%20not%20to%20be%20moved%20or%20removed/Imp%20of%20checking%20LO%20analysis%20.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_3/Resources%20not%20to%20be%20moved%20or%20removed/MEI%20on%20LO%20analysis.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_3/Resources%20not%20to%20be%20moved%20or%20removed/MEI%20on%20LO%20analysis.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_3/Resources%20not%20to%20be%20moved%20or%20removed/Imp%20of%20checking%20LO%20analysis%20.pdf


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Sump TankPurifier

Cooler

Pump

Drip Oil andInsoluble from

Combustion space

Finding the Cause of Deterioration

Faulty

Operation

Leakage of Water

Bearing

metals


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Reporting to Superintendent and DesignatedPerson Ashore

Make a counter

measure plan. Report

and discuss to

Superintendent as

soon as possible.

!Contact DPA if SI has no

action taken. Prompt actionis required!


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Renewal of Sump Tank Lube Oil

Sump Tank

Cooler

Pump

L.O. Sett.Tk

L.O. Sto.Tk

Cost Comparison:

High Water content

D/G Crankshaft is US$ 98,000; whereas:

Cost Of D/G L.O. (Renewal) is US$ 4000

Pentane content is

above limit.


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Sump Tank

Cooler

Pump

L.O. Sett.Tk

L.O. Sto.Tk

High Water content

Pentane content is

above limit.

Dont hesitate to carry

out this procedure

whenever necessary for

the protection of the

machinery.

Renewal of Sump Tank Lube Oil


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Cost comparison

Required Minimum L.O. Quantity Onboard

Total Renewal Quantity/Time

Sump Tank

Cooler

Pump

L.O. Sett.

Tk

L.O. Sto.

TkL.O. Sett.

Tk

45,000 Ltrs

Always keep an empty L.O. Settling

tank, for emergency use!


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Collection of

Stuffing Box

Leak Oil

Purification

A

Collection of

Stuffing Box

Leak Oil

Heating

Settling

Draining off

Purification

A

Shore Analysis

Good?

Blending

Ratio

yes

no

Replenishment

Waste oil Tank

Procedure for Re-using Purified Stuffing Box Leak Oil

no


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Cylinder Oil Feed Rate Cylinder Oil is accounted for 70-80% Lubrication expense

Cost Efficiency/Good Lubrication Condition


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Cost Efficiency

Cylinder Oil Feed Rate Reduction

For 6000 TEU Container Vessel

0.1 g/kw/hr = 10% savings for the monthly cost:

40,000 ltrs/month ( 10% = 4000 Ltrs)or about US$ 8000/month

For PCC Vessel

20,000 ltrs/month ( 10% =2000Ltrs)or about US$ 4000/month


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Bad Effect of Wrong Judgement?


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Calculation of Feed Rate (QActual)

QACT = QCONS/Day X Density X 1000

24 X PACT

Where:

QACT - Converted consumption rate at actual power

QCONS/DayCylinder Oil Consumption (Ltr/day)

DensityO.943

PACTAcual Power


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Calculation of Feed Rate (QMCR)

QMCR =Q ACTUAL X N MCR X P Actual

N ACTUALX PMCRWhere:QMCR - Converted Cylinder oil feed ratio at derated (specified) MCR

NACT - Actual Revolution (Rpm)

PACTActual Power

QACT - Converted consumption rate at actual power

NMCR - Derated (specified) maximumcontinuous revolution (Rpm)

PMCRDerated (specified) Maximum Continuous Rating (Kw)


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Comparison of Feed Ratio (QACTUAL and QMCR )

QACTUAL varies with the actual power of the mainengine.

QMCR is the baseline of feed rate measurement

QMCR should be indicated in the Power Report.

Note:

Adjustment of cylinder oil feed rate to main

engine shall be based on QMCR.


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Minimum Feed Rate

Adjustment of Cylinder oil feed rate

2.0

B

A

C

D

E

F2.1

2.2

2.3

2.5

2.4

2.6

2.7

2.8

2.9

(g/kw/h)

0 1500 3000 5000 1 YEAR

Abt. 7000

RunningIn and Cylinder Lubrication

Use Converted Cylinder Oil Feed Ratio at DeratedMCR (QMCR)

QMCR


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