09 Fuel Oil System in E/R

Course 2004

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Fuel Oil System - E/R

Purpose of the rules and regulations;

To achieve safe and reliable transfer, purifying and supply of fuel oil for combustion (e.g. propulsion and power generation) while at the same time avoid fire risks

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Fuel Oil System - E/R

Fire hazard- Insulation- Tanks- Piping- Quick closing valves- Remote stop of pumps- Drain

Performance- Propulsion- Electric generation

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Fuel Oil System - E/R

Fuel oil tanks:- Only fuel with flash point 60C and above acceptable (except with restricted

cold service area, gas as a fuel, crude oil installation, or HSLC)

- Heating only up to 10C below flash point- Except:

- Temperature at outlet less than 60C if less than 3 meters from ignition source

- Flame screens- No opening from vapour in tank to machinery spaces- Well ventilated cofferdam above tank- Only intrinsically safe electrical equipment in vapour space of tank

- Separated from FW tanks with cofferdams

- If located close to boiler or other hot surfaces: Insulated

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Fuel oil piping fire prevention:- Detachable pipe connections ;

- Minimise the number- Keep away from heated surfaces e.g. M/E, G/E, boilers and

exhaust gas pipes

- Remote shut-off device - All connections on fuel oil tanks which are below liquid level and in open

position during service - The operation shall be at central position outside E/R- Also relevant for pipes entering the engine room from tanks above engine

room double bottom level located outside the E/R- Quick closing valves are not to be kept open by pneumatic or hydraulic

pressure

- Drip tray from fuel oil tanks to be drained to waste oil tank

Fuel Oil System - E/R

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Fuel oil piping keep engines going:- Redundant fuel supply pumps

- Filters to be possible to be cleaned without interrupting fuel supply- For auxiliary engines one filter per generator is acceptable

- Tanks to be fitted with means for draining water- if open drain it is to be fitted with self-closing valve

- HFO tanks sloping bottom- very important to get efficient drain of particles- Many engine break-downs due to rough weather bringing particles up into

the fuel again

Fuel Oil System - E/R

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Fuel oil piping keep engines going:- Flowmeter of positive displacement type: Loss of fuel oil supply to diesel

engines in case of blocked flowmeter must be prevented- Automatic by-pass required

- HFO system: Fuel oil separators required

Fuel Oil System - E/R

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1.

2.

3.

Centrifugal separationvessel with disc-stack

The basis of Separation

>5000 g

Show movie

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Fuel Oil System - E/R

MAIN ENGINE

AUX. ENGINE

STORAGETANKS

SETTLINGTANKS

PURIFIERS

PUMPS

SERVICE TANKS

FILLINGSCONNECTIONS

FILLINGSCONNECTIONS

PUMPS

PUMPS

Principal sketch - Fuel oil system HFO

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FO Filling And Transfer System

HFO

SERV TK

HFO

SETT TK

LS HFO

SERV TK

LS HFO

SETT TK

No.2

HFO TK

LS HFO

TK

NO.2 DO

STOR TK

NO.2

HFO TK

NO.1

HFO TK

FWD CARGO

MANIFORD

ABAFT CARGO

MANIFORD

IN FRONT OF

ACCOMM.

FWD CARGO

MANIFORD

ABAFT CARGO

MANIFORD

IN FRONT OF

ACCOMM.

FO OVERFLOW TK

A

A

F.O

DRAINS

D

.

O

T

R

A

N

S

F

E

R

P

U

M

P

H

.

F

.

O

T

R

A

N

S

F

E

R

P

U

M

P

DO

SERV TKNO.1 DO

STOR TK

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Fuel Oil Purifying System

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M/E Fuel Oil Service System

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G/E Fuel Oil Service System

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A/B Fuel Oil Service System

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Incinerator & Emcy G/E Fuel Oil Service System

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Purifier Room

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Purifier Room

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Fuel Oil Supply Unit

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Heat Exchanger

1. Shell and tubular type heat exchanger

It is the most common type of heat exchanger in oil refineries and other large chemical processes, and is suited for higher-pressure applications.

In the shell and tube design a tube bundle or stack is fitted into a shell.

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Shell and tubular type heat exchanger

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Shell and tubular type heat exchanger (straight type)

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Shell and tubular type heat exchanger (straight type)

1 Shell 2 Shell Cover 3 Shell Flange Channel End

4 Shell Flange Cover End 5 Shell Nozzle 6 Floating Tube Sheet

7 Floating Head Cover 8 Floating Head Flange 9 Floating Head Backing

10 Stationary Tube Sheet 11 Channel Head 12 Channel Cover

13 Channel Nozzle 14 Tie Road and Spacer 15 Baffle Plate

16 Impingement Baffle 17 Pass Partition 18 Vent Connection

19 Drain Connection 20 Instrument Connection 21 Support Saddle

22 Lifting Lug 23 Tube 24 Weir

25 Liquid Level Connection 26 Shell Nozzle Flange 27 Channel Nozzle Flange

28 U Tube 29 Gasket

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Shell and tubular type heat exchanger (U-tube type)

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Shell and tubular type heat exchanger (U-tube type)

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Auto filter

Auto filter

Internal backwash assembly uses small portion of process steam to clean tubes individually and consecutively without interruption of flow.

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H.F.O Auto filter

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L.O Auto filter

Filtration

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Double Assembly FO Pump

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VISCOSITY CONTROLLER

The sensor consists of a pendulum attached to a base plate by a torsion tube.

Two sets of piezo-electric elements are positioned inside the pendulum.

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VISCOSITY CONTROLLER

One set drives the pendulum, the other set measures and controls its rotational movement via a feedback circuit.

This closed-loop controlled rotational vibration principle is independent of ageing of piezo material, ensuring long stable and accurate measurement.

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VISCOSITY CONTROLLER

For viscosity measurement, the resulting frequency at two specific values of phase difference is detected.

This gives a value for the dampening which is proportional to the square root of the viscosity.

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CONNECTIONS

Reference : www.vaf.nl

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Viscosensor on FO supply module

Reference : Solartron Mobrey

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Vibration Type Viscosity Controller The active part of the sensor is a vibrating rod. The vibration amplitude

varies according to the viscosity of the fluid in which the rod is immersed.

These viscosity meters are suitable for measuring clogging fluid and high-viscosity fluids even with fibers

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Flowmeter

Flowmeter

An instrument used to measure pressure, flow rate, and discharge rate of a liquid, vapor, or gas flowing in a pipe.

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Flowmeter

VANE TYPE

- Suitable for viscous media ranging from hydraulic oils to light gear oils, the vane eliminates problems associated with viscosity changes during operation.

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Flowmeter

RADAR TYPE

- It consists of a transceiver which produces an audio frequency output related to the shift in frequency between radio waves backscattered from particulate matter carried in a fluid and the radiated radio waves.

- A variable gain amplifier and low pass filter are provided for amplifying and filtering the transceiver output.

- A frequency counter having a variable triggering level is provided to determine the magnitude of the shift.

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Flowmeter

ULTRA SONIC TYPE

- Measure the flow velocity , volume or mass flow of a liquid or a gas.

- Non-invasive liquid flow monitoring : transit time and doppler.

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Flowmeter

ULTRA SONIC TYPE

It can detect in-situ flowrates from outside the pipework, without any interruption to flow or process.

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References;

Fuel Oil System - E/R

- DNV Rules for Ships Pt.4 Ch.6 Sec.5D

- SOLAS 1974 as amended Ch.II-1 Reg.26 and Ch.II-2 Reg.11

- SOLAS 2000 Amendments Ch.II-2 Reg.4

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Fuel oil system E/R

Additional requirements for - FUEL- Dynpos AUTR/ AUTRO- RP/RPS

Note: Different requirements with regard to pump redundancy: For RP/S TWO pumps required for each of the main engines/ generator engines unless ship can keep normal propulsion power without this engine/ generator