marioff hi-fog gpu systems for the protection of industrial applications marioff hi-fog training 5...

Marioff HI-FOG GPU Systemsfor the protection of

Industrial Applications

Marioff HI-FOG Training

5 August 2008

Amit Lior

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).

Applicable Standards

NFPA 750 Standard on Water Mist Fire Protection Systems

FM Approval Standard Class 5560

VdS Standard

IMO

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

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.

Applications

Turbine Enclosures

Protected Enclosures

VdS Approved:

Maximum enclosure height 5 m

Maximum enclosure volume 500 m3

FM Approved:

Maximum enclosure height 7,5 m


IMO Approved:

Maximum enclosure height 7,5 m


Also:

All ventilation openings and\or forced ventilation arrangement shall be capable of automatic closure or shut-down prior to system discharge.

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’.)


Actuator Valves

Hydraulic Valve

Solenoid Valve

dP (delta P) Valve

Slave Valve


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


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)


Additional Devices

Shutoff Valve

Protection caps

Protective cabinet

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

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

Operation

First Cylinder, Bank I

Hydraulic Valve opens.

Pressure increases in the manifold of cylinder bank I.

H DPSSSSSSSSS

SSSSSSSSS

H DPSSSSSSSSS

SSSSSSSSS

Operation

Bank I

Slave Valves of bank I open.

H DPSSSSSSSSS

SSSSSSSSS

H DPSSSSSSSSS

SSSSSSSSS

Operation

Discharge with Bank I

Pressure of bank I drops.

H DPSSSSSSSSS

SSSSSSSSS

H DPSSSSSSSSS

SSSSSSSSS

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

Operation

Bank I

Slave Valves of bank II open.

H DPSSSSSSSSS

SSSSSSSSS

H DPSSSSSSSSS

SSSSSSSSS

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.

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.

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.


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.

Distribution Network

System Design

1) Application & Requirements

2) Enclosure

3) Spray-Heads location

4) Gas cylinders & Piping Network

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

System Design

Sample RFQ No. 2

Application: generators room


Fire hazard: two diesel generators

Approval authority: N.A.


System Design

Sample RFQ No. 3

Application: steam turbine

Dimensions: 14 m (L) 9 m (W) 7,5 m (H)

Fire hazard: steam turbine



945 m3 945 m3

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.


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.


System DesignSample Spray-Heads location No. 1

Application: compressors room


Fire hazard: electric motors, compressors, oil skid (150 litre)

Compressed gas: nitrogen, 200 bar



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


Application: generator room


Fire hazard: generator, electric cabinet

Compressed gas: air, 200 bar

Approval authority: IMO



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


Application: engine test cell


Fire hazard: motor

Compressed gas: air, 200 bar




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

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.

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

reminder: Gas Cylinders

Amount of gas cylinders depends on:

Number of spray-heads

Duration of discharge

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

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

Don’t Forget

Other system:

Detection System

Alarm

Gas supply

Additional:

Enclosure

Warenty and service

ThanksThanks

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