Shell Thermia B Best performer in most demanding conditions SHELL THERMIA B.

transcript

Shell Thermia BShell Thermia B Best performer in most demanding conditions

SHELL THERMIA B

Best performer in most demanding conditions

Shell Thermia BShell Thermia B

THERMIC FLUID

SELECTION CRITERIA

1. Operating experience

2. Operating Hazards :

Toxicity, explosiveness & flammability.

3. Handling problems

4. Availability and cost

THERMIC FLUID

SELECTION CRITERIA

5. Bulk / Film temperatures.

6. Thermal properties :

Specific heat, conductivity, Heat transfer coefficient

7. Degradation rate.

8. Pumping properties

Requirements from a thermic fluid

Low solidification temperature. Good thermal stability. Low viscosity over the whole temp. range

(also in the start-up condition). Good heat transfer properties. High specific evaporation enthalpy (when

used as vapours).

Requirements from a thermic fluid

Low corrosion tendency for the materials of the apparatus

Non toxic and non - smelly. Low sensitivity to impurities (e.g.. oxygen). Low fire risk. Low risk to the environment on leakage. Possibility of easy destruction (passing used

material into the natural circulation circuit). Economy of operation

Chemical Composition

• Mineral oils are mixture of hydrocarbons• Alkanes: Have carbon atoms arranged in

straight or branched chains.• Cycloalkanes: Contain some rings of carbon

atoms.• Aromatics:Contains rings of carbon atoms but

a lower proportion of hydrogen than cycloalkanes.

Chemical Composition

Viscosity

Oxidation

Stability

Solvency Boundary

Lubrication

Alkanes

Aromatics

Cycloalkanes

Asphaltenes

Highest Most Resistant Worst Worst

BestBestLeast Resistant

Lowest

Base Oils and Fluid Performance

VISCOSITY

SURFACE

ACTIVITY

SOLVENCY VOLATILITY

OXIDATION

STABILITY

PUMPABILITY, LOW TEMP. PROPERTIES, ENERGY LOSSES, PUMP WEAR

EMULSIFICATION, METAL CORROSION

SEAL COMPATIBILITY

OIL CONSUMPTION, THICKENING, DEPOSIT FORMATION, VAPOUR PRESSURE

DEPOSIT FORMATION, OIL THICKENING, ACIDITY BUILDUP, CORROSION OF METALS

Viscosity

• Viscosity increases with oxidation.• Viscosity decreases with thermal

cracking.• Viscosity affects turbulence of flow.• Viscosity at operating temperature is

more important.

Flash Point

• Lowering of flash point is indication of something wrong but not necessarily dangerous.

• Method of sampling is very important.• Sustenance of flash point during

operation is very important from safety view point.

Flash Point

• COC (IP36/ASTM D 92) or IP 35• PMCC (IP 34/ ASTM D 93)• Difference between the two flash points

will be typically 15 0 C• Repeatability difference: +/- 70 C• Reproducibility difference:+/- 160 C

Oxidation Stability

• Effect of Oxygen (or Air) on oil properties• Various component of oil vary in oxidation

resistance.• Modern refining removes components with

low oxidation resistance• Higher the temperature higher will be rate of

oxidation • Copper & its alloys are catalysts for oxidation

Oxidation Stability

• Oxygen attacks hydrocarbons to form unstable peroxide derivatives.

• Some unstable peroxides further react to form acidic products which are oil soluble.

• Some form non soluble gum and sludge.• Acidity and insoluble matter is measure of

oxidation of oil.

Oxidation Stability

• Severe oxidation results in viscosity increase• Oxidation in Heat transfer system takes place

mainly in DE tank• Pump may suck air causing oxidation• Recharging of leaked fluid is also a source of

oxidation

Thermal Stability

• Mineral oil is complex mixture of hydrocarbons varying in structure and molecular weight each with its own characteristic breakdown temperatures.

• Cracking is rupture of a carbon-carbon or carbon-hydrogen bond.

• Cracking reduces viscosity.• Cracking reduces flash point.

Thermal Stability

• Lower weight molecular join to make heavy molecules which appear as deposits

• Deposits lower heat transfer efficiency

Other Properties

• Vapour Pressure: It is function of volatility• Pour Point:Important for initial startup• Density : For designing thermic fluid system• Specific Heat • Corrosiveness• Fire Point

Specific Heat varies from 0.45 at 30oC to 0.70 at 300oC. Unit : Kcal/Kg

FLASH POINT of fresh oil =200 to 235oC

FIRE POINT =Flash Point + 30oC

Specific Heat & Fire Point

Temperature at which change of phase takes place.

330o to 371oC

Boiling point can vary from 330o to 371oC

Boiling Point

Thermic Fluid degradation

Particulate fouling :

Deposition of suspended matter Reaction fouling :

Cracking, coking, polymerisation Solubility fouling :

Deposition of Dissolved solids

CONTAMINATIONProcessMaterial

Corrosion Products

Lubricants

Sludge

Cu + Cu Alloys

Thermic Fluid

Degraded Thermic

Mixing differentbrands of Thermic Fluids

Thermic fluid degredation process

OXIDATION

CRACKING

CONTAMINATION

LOWERVISCOSITY

LIGHTER HYDRO

CARBONS

+LOWER FLASH

FORMATIONOF

DEPOSITS

THERMIC FLUID DEGRADATIONMAJOR FACTORS

Oxidation - Exposure to airCoking - High film temperatureFormation of low boilersThermal cracking Dehydrogenation - gas formationReaction with foreign matter

SOME OPERATING CHALLENGES

UNCONTROLLED MIXING INERT GAS BLANKETING NOT THERE DE TANK TEMPERATURE IS HIGH OPERATING TEMPERATURE VARIES BY 10 TO 20

DEG C. LACK OF PERIODIC OIL ANALYSIS PROGRAMME ABSOLETE CRITERIA FOR DISCARDING OIL PILFERAGE/ MIXING POOR RECORDING PRACTICES

SOME OPERATING CHALLENGES

SPURIOUS PRODUCT TOPUP

POOR OPERATING KNOWLEDGE REPORTING OF COMPLAINTS

UNSTRUCTURED

COLLECTION & TRANSPORTATION OF SAMPLES VERY POOR

HOW DOES SHELL THERMIA B TAKE CARE OF THESE OPERATING CHALLENGES

UNCONTROLLED MIXING

INERT GAS BLANKETING NOT THERE

DE TANK TEMPERATURES HIGH

OPERATING TEMPERATURE VARIATION BY 10 TO 20 DEG C

TEST BEFORE MIXING

INBUILT FACTOR OF SAFETY

HIGH ON ANTI

OXIDATION PROPERTY

INBUILT FACTOR OF SAFETY

HOW DOES SHELL THERMIA B TAKE CARE OF THESE OPERATING CHALLENGES………CONTD.

LACK OF PERIODIC OIL ANALYSIS PROGRAMME

ABSOLUTE DISCARD CRITERIA

PILFERAGE/ MIXING POOR RECORDING

PRACTICES

SHELL CARE

ON TRENDS GIVEN BY SHELL CARE.

DEDICATED TRANSPORT VEHICLES

SHELL CARE OCM CUSTOMER EDUCATION

HOW DOES SHELL THERMIA B TAKE CARE OF THESE OPERATING CHALLENGES………..CONTD.

SPURIOUS PRODUCT TOPUP

POOR OPERATING KNOWLEDGE

REPORTING OF COMPLAINTS UNSTRUCTURED

COLLECTION & TRANSPORTATION OF SAMPLES VERY POOR

SHELL CARE MONITORING

CUSTOMER TRAINING

COMPLAINT HANDLING SYSTEM

SHELL CARE KIT

“All Oils are not the same”

So what ? What is in it for me ?

Shell Thermia B

Shell Base Oils

Extraction Company

Refining Company

Blending Plant

Shell Oils

Does Variability really matter ?

Characteristic

ViscosityViscosity IndexPour Point

Spot Market Base Oil

DefinedDefinedDefined

Sulphur ContentNitrogen ContentMono Aromatic ContentDi Aromatic ContentPoly Aromatic ContentStraight Chain Paraffin Cont.

VariableVariableVariableVariableVariableVariable

Does Variability really matter ?

Branched Paraffin Cont.Flash Point AcidityTotal Polar ContentResidual CarbonOxidation PerformanceAir ReleaseDemulsificationDemulsibilityOther minor factors

VariableVariableVariableVariableVariableVariableVariableVariablevariablevariable

“Non variable Formulation”

• Vertically Integrated Proposition

• Exclusive non variable formulation

• 19 base oil parameters defined & controlled

SHELL THERMIA B : Key characteristics

Bulk Temperature upto : 3200C

Film Temperature upto : 3400C

Density @ 150C : 0.868

Flash point (COC) : 2100C

Kin Viscosity @ 400C : 25 cSt

@ 1000C : 4.65 cSt

@ 3000C : 0.5 cSt

Pour Point : -90C

Thermal Expansion/0C : 0.00076

Neutralization Number : 0.05 mg KOH/g

Shell Thermia B

FEATURES Benefits for youHigh Oxidation Stability Longer oil life and higher heat

transfer characteristicsHigh Thermal Stability Lower top ups, hence lower

Thermic fluid consumptionBetter Viscosity -TemperatureCharacteristics ( See Graph)

Promotes turbulent flow for betterheat transfer efficiency

Higher fresh oil Flash point Lower top up and longer life of oil.Higher Specific heat – Temperaturebehaviour

Greater heat carrying capacity-better efficiency of heater

Higher Thermal conductivity Higher rate of heat transfer acrosstemperature gradient.

Lower Pour point Higher level of refining, hencebetter Thermic fluid.

Shell CARE

Shell Lube Analyst : ….What is it ?!

Oil condition monitoring program– Interpretation– Diagnosis– Remedial Action

Shell Lube Analyst : ….Why ?!

Trend analysis

Uniform testing facilities

Monitors equipment condition

Only where the oil is in contact

with parts

Shell Lube Analyst : ….How?!

Sample courier infrastructure

Expert diagnoticians

Quick Reports (within max 72 hours)

Shell Lube Analyst : ….How?!

Welcome Kit

Clearly defined & controlled process

World class testing facility

Shell Lube analyst CARE limits for in-service heat transfer oil

Physio-Chem Parameter

Limiting Value Comments

Kin. Viscosity @ 40/100ºC

(+/-) 25% Check TAN & Flash Point also before discarding

Flash Point 170ºC Vent system and recheck flash point before discarding

TAN 1.75 - 2.00 Depending on system volume, topup & service life check viscosity & metals before discarding

Total insolubles 2.00% by wt Check TAN before discarding

C u s to m e r C o l le c t io n C e n te r

S h e l l L a b

Im p r o v e m e n t D ia g n o s is

R e p o r t

Shell Lube Analyst - How does it operate ?!

•Feed back on oil condition

•Minimize unscheduled shut downs

•Optimization of oil life in the system

•Increased equipment availability

•Peace of Mind

•LOW COST OF OPERATION - IT SAVES YOU MONEY

Benefits of Shell Lube Analyst

BENEFITS OF SHELL THERMIA B PROPOSITION

MOST RELIABLE PRODUCT FOR INDIAN WORKING CONDITIONS

Shell Lube Analyst

+ NO ADDITIONAL COST + DIAGNOSIS & REMEDY BY EXPERTS + WORLDCLASS OCM PROGRAMME + 72 HOURS TURN AROUND TIME

SERVICES INBUILT CONDITION MONITORING

PROGRAM (SHELL CARE)

APPLICATION ADVICE

LOGISTIC SUPPORT AVAILABLE ANYTIME BY SHELL STAFF

CUSTOMER EDUCATION & TRAINING

COMPLAINT HANDLING

Total solution

ProductService

Logistics

Shell Thermia B Best performer in most demanding conditions SHELL THERMIA B.

Documents