marioff hi-fog gpu systems for the protection of industrial applications marioff hi-fog training 5...
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Marioff HI-FOG GPU Systemsfor the protection of
Industrial Applications
Marioff HI-FOG Training
5 August 2008
Amit Lior
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What is GPU?
Marioff HI-FOG GPU is the only water-mist system propelled by a Gas-driven Pump Unit.
Like accumulator units, the GPU is using compressed gas as propellant and as atomizing agent, yet the GPU utilizes non-compressed water source.
GPU system is actuated either manually or automatically.
Provided with gas cylinders and a water tank, the GPU is a self contained unit, requiring no supply of electric power or water for operation
Marioff HI-FOG GPU was tested for both fire-righting ability and for component qualities to the satisfaction of FM (USA), VdS (Germany), and VNIIPO (Russia).
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Applicable Standards
NFPA 750 Standard on Water Mist Fire Protection Systems
FM Approval Standard Class 5560
VdS Standard
IMO
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Applications
Machinery Space:
oil pumps
oil tanks
fuel filters
transformer vaults
gear boxes
drive shafts
lubrication skids
diesel engine driven generators
other similar machinery using fuel and/or lubrication fluids with volatilities less than or equal to light diesel
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Applications
Special Hazard Machinery Space:
internal combustion engines, other equipment using fuel and/or lubrication fluids with volatilities less than or equal to Heptane.
incidental use, or storage of limited quantities of flammable liquids of not more than two 55 gal (208 L) drums.
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Applications
Turbine Enclosures
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Protected Enclosures
VdS Approved:
Maximum enclosure height 5 m
Maximum enclosure volume 500 m3
FM Approved:
Maximum enclosure height 7,5 m
Maximum enclosure volume 750 m3
IMO Approved:
Maximum enclosure height 7,5 m
Maximum enclosure volume 1500 m3
Also:
All ventilation openings and\or forced ventilation arrangement shall be capable of automatic closure or shut-down prior to system discharge.
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Structure & Components
Each GPU consists of:
Gas-Driven Pump Unit module
Bank of compressed gas cylinders, including actuator valves.
Section Valve
Monitoring devices (pressure gauge etc’.)
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Structure & Components
Actuator Valves
Hydraulic Valve
Solenoid Valve
dP (delta P) Valve
Slave Valve
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Structure & Components
Gas cylinders
Preferably provided by local supplier.
Dimensions:
Diameter: ca. 240 mm
Maximum cylinder height: 1390 mm - 1525 mm
Thread type: 24,32 1,814 SFS2292
(adaptor applicable for several options)
Amount of gas cylinders depends on:
Number of spray-heads
Duration of discharge
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Structure & Components
Monitoring Devices Pressure Gauge- Water Input line
Pressure Gauge- Output line
Pressure Gauge- Gas Cylinder (included in actuation valves)
Pressure Switch- Gas Cylinder (included in actuation valves)
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Structure & Components
Additional Devices
Shutoff Valve
Protection caps
Protective cabinet
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Operation
Standby
All section valves closed.
Pressure of ca. 25 bar in maintained by the standby pump.
All actuator salves are closed.
There is no flow in the system.
H DPSSSSSSSSS
SSSSSSSSS
H DPSSSSSSSSS
SSSSSSSSS
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Operation
Start Signal
One Section Valves opened.
Some flow generated by the standby pump, but the pressure drops. H DP
SSSSSSSSS
SSSSSSSSS
H DPSSSSSSSSS
SSSSSSSSS
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Operation
First Cylinder, Bank I
Hydraulic Valve opens.
Pressure increases in the manifold of cylinder bank I.
H DPSSSSSSSSS
SSSSSSSSS
H DPSSSSSSSSS
SSSSSSSSS
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Operation
Bank I
Slave Valves of bank I open.
H DPSSSSSSSSS
SSSSSSSSS
H DPSSSSSSSSS
SSSSSSSSS
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Operation
Discharge with Bank I
Pressure of bank I drops.
H DPSSSSSSSSS
SSSSSSSSS
H DPSSSSSSSSS
SSSSSSSSS
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Operation
First Cylinder, Bank II
dP valves releases the first cylinder of bank II.
Pressure increases in the manifold of cylinder bank II. H DP
SSSSSSSSS
SSSSSSSSS
H DPSSSSSSSSS
SSSSSSSSS
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Operation
Bank I
Slave Valves of bank II open.
H DPSSSSSSSSS
SSSSSSSSS
H DPSSSSSSSSS
SSSSSSSSS
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Spray-Heads
4S 1MC 8MC 1000
Installed at ceiling level or above a 2m wide door
discharging downward.
4S 1MC 8MB 1000
Installed above a 2m wide door
discharging downward.
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Spray-Heads
Ceiling height
Enclosure’s volume
Compressed gas
door spray-heads
5 m 500 m3 Air required for Special Hazard Machinery Spaces 5 m 500 m3 Nitrogen not required 5 m 750 m3 Air required 5 m 750 m3 Nitrogen not required
7,5 m - Air required 7,5 m - Nitrogen not required
Door spray-heads are not required for IMO approved systems.Door spray-heads are not required for IMO approved systems.
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Spray-Heads
Ceiling height up to 5 m and total volume of no more than 500 m3:
Max. spacing between spray-heads 5 m.
Max. distance from walls 2,5 m.
Ceiling height up to 7,5 m and\or total volume of no more than 750 m3:
Max. area between four adjacent spray-heads 12,5 m2.
Max. distance from walls 2,5 m.
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Distribution Network
Pressure Calculation:
Darcy-Weisbach calculation method is applied, assuming complete mixing of the water and gas mixture.
The spray head-specific nominal water flow rate of 12,5 litre/minute is multiplied by 1.8 and hydraulic calculations are run normally.
The calculated pressure drop must be within 5 – 15 bar.
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Distribution Network
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System Design
1) Application & Requirements
2) Enclosure
3) Spray-Heads location
4) Gas cylinders & Piping Network
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System Design
Sample RFQ No. 1
Application: fuel storage
Dimensions: 10 m (L) 8 m (W) 6 m (H)
Fire hazard: five fuel tanks, 350 litre of Diesel fuel each
Approval authority: FM
Protection time: 30 minutes
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System Design
Sample RFQ No. 2
Application: generators room
Dimensions: 14 m (L) 9 m (W) 10 m (H)
Fire hazard: two diesel generators
Approval authority: N.A.
Protection time: 60 minutes
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System Design
Sample RFQ No. 3
Application: steam turbine
Dimensions: 14 m (L) 9 m (W) 7,5 m (H)
Fire hazard: steam turbine
Approval authority: FM
Protection time: 15 minutes
945 m3 945 m3
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reminder: Spray-Heads
Ceiling height up to 5 m and total volume of no more than 500 m3:
Max. spacing between spray-heads 5 m.
Max. distance from walls 2,5 m.
Ceiling height up to 7,5 m and\or total volume of no more than 750 m3:
Max. area between four adjacent spray-heads 12,5 m2.
Max. distance from walls 2,5 m.
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System DesignSample Spray-Heads location No. 1
Application: compressors room
Dimensions: 10 m (L) 8 m (W) 6 m (H)
Fire hazard: electric motors, compressors, oil skid (150 litre)
Compressed gas: nitrogen, 200 bar
Approval authority: FM
Protection time: 30 minutes
volume = 480 m3volume = 480 m3
door spray-heads: not required door spray-heads: not required
grid: 2 \ 1 \ 2grid: 2 \ 1 \ 2
5 m
3,2 m
2,5 m2,5 m
2 m
4 m 10,25 m2
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System DesignSample Spray-Heads location No. 2
Application: generator room
Dimensions: 14 m (L) 10 m (W) 7 m (H)
Fire hazard: generator, electric cabinet
Compressed gas: air, 200 bar
Approval authority: IMO
Protection time: 60 minutes
volume = 980 m3volume = 980 m3
door spray-heads: not required door spray-heads: not required
grid: 3 \ 2 \ 3grid: 3 \ 2 \ 3
4,6 m
2,5
m5
m
2,4 m
11,5 m2
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System DesignSample Spray-Heads location No. 3
Application: engine test cell
Dimensions: 12 m (L) 8 m (W) 4 m (H)
Fire hazard: motor
Compressed gas: air, 200 bar
Approval authority: FM
Protection time: 60 minutes
volume = 384 m3volume = 384 m3
door spray-heads: required door spray-heads: required
grid: 2 x 3grid: 2 x 3
4 m 2 m
2,5 m
5 m
4 m 2 m
2,5 m
5 m
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reminder: Distribution Network
Pressure Calculation:
Darcy-Weisbach calculation method is applied, assuming complete mixing of the water and gas mixture.
The spray head-specific nominal water flow rate of 12,5 litre/minute is multiplied by 1.8 and hydraulic calculations are run normally.
The calculated pressure drop must be within 5 – 15 bar.
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System Design
Sample Piping Network No. 1
5 m
2 m
4 m
5 m
2 m
4 m
5 m
2 m
4 m
5 m
2 m
4 m
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reminder: Gas Cylinders
Amount of gas cylinders depends on:
Number of spray-heads
Duration of discharge
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System Design
Gas Cylinders and Actuation Valves for Sample No. 1
5 spray-heads
30 minutes discharge
5 m
3,2 m
2,5 m2,5 m
2 m
4 m 10,25 m2
15 cylinders = two banks of 8 cylinders = two banks of 4 + two banks of 415 cylinders = two banks of 8 cylinders = two banks of 4 + two banks of 4
First release valve: HydraulicFirst release valve: Hydraulic
Second bank release: dPSecond bank release: dP
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Restrictions
Site Specific:
Hazardous Areas
Temperature Range
Construction Materials
Water supply
Enclosure:
Shut-down time
Forced ventilation and openings
GPU:
Max. amount amount of spray-heads
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Don’t Forget
Other system:
Detection System
Alarm
Gas supply
Additional:
Enclosure
Warenty and service
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