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09 Fuel Oil System in E/R
Course 2004
Slide 2
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
Slide 3
Fuel Oil System - E/R
Fire hazard- Insulation- Tanks- Piping- Quick closing valves- Remote stop of pumps- Drain
Performance- Propulsion- Electric generation
Slide 4
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
Slide 5
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
Slide 6
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
Slide 7
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
Slide 8
1.
2.
3.
Centrifugal separationvessel with disc-stack
The basis of Separation
>5000 g
Show movie
Slide 9
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
Slide 10
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
Slide 11
Fuel Oil Purifying System
Slide 12
M/E Fuel Oil Service System
Slide 13
G/E Fuel Oil Service System
Slide 14
A/B Fuel Oil Service System
Slide 15
Incinerator & Emcy G/E Fuel Oil Service System
Slide 16
Purifier Room
Slide 17
Purifier Room
Slide 18
Fuel Oil Supply Unit
Slide 19
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.
Slide 20
Shell and tubular type heat exchanger
Slide 21
Shell and tubular type heat exchanger (straight type)
Slide 22
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
Slide 23
Shell and tubular type heat exchanger (U-tube type)
Slide 24
Shell and tubular type heat exchanger (U-tube type)
Slide 25
Auto filter
Auto filter
Internal backwash assembly uses small portion of process steam to clean tubes individually and consecutively without interruption of flow.
Slide 26
H.F.O Auto filter
Slide 27
L.O Auto filter
Filtration
Slide 28
Double Assembly FO Pump
Slide 29
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.
Slide 30
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.
Slide 31
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.
Slide 32
CONNECTIONS
Reference : www.vaf.nl
Slide 33
Viscosensor on FO supply module
Reference : Solartron Mobrey
Slide 34
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
Slide 35
Flowmeter
Flowmeter
An instrument used to measure pressure, flow rate, and discharge rate of a liquid, vapor, or gas flowing in a pipe.
Slide 36
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.
Slide 37
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.
Slide 38
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.
Slide 39
Flowmeter
ULTRA SONIC TYPE
It can detect in-situ flowrates from outside the pipework, without any interruption to flow or process.
Slide 40
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
Slide 41
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