marine systems

44
1 FELS OFFSHORE, MUMBAI FELS OFFSHORE, MUMBAI MARINE SYSTEMS MARINE SYSTEMS

Upload: vikrantgulhane

Post on 26-Dec-2015

79 views

Category:

Documents


0 download

DESCRIPTION

FPSO MARINE SYSTEM

TRANSCRIPT

Page 1: Marine Systems

11

FELS OFFSHORE, MUMBAIFELS OFFSHORE, MUMBAI

MARINE SYSTEMSMARINE SYSTEMS

Page 2: Marine Systems

22

CONTENTS CONTENTS Bilge SystemBilge System Ballast systemBallast system Fuel Oil SystemFuel Oil System Lube Oil and Dirty Oil SystemLube Oil and Dirty Oil System Compressed Air SystemCompressed Air System

:: Service / Control Air Service / Control Air:: Starting Air Starting Air

Potable Water SystemPotable Water System Fire Fighting SystemFire Fighting System

:: Fire Main System Fire Main System:: CO2 System CO2 System:: Sprinkler Sprinkler

Sanitary SystemSanitary System Refrigerant SystemRefrigerant System Deck Drainage SystemDeck Drainage System Engine Cooling SystemEngine Cooling System

:: Sea Water Cooling Sea Water Cooling:: Fresh Water Cooling Fresh Water Cooling

Engine Exhaust SystemEngine Exhaust System

Page 3: Marine Systems

33

Bilge SystemBilge System

This system is used to discharge the accumulated water over board, to This system is used to discharge the accumulated water over board, to maintain dryness in the machinery space and compartment.maintain dryness in the machinery space and compartment.

Water usually comes from leakage in Equipments, pipes, shell damage Water usually comes from leakage in Equipments, pipes, shell damage and other sources such as washing water and rain.and other sources such as washing water and rain.

The System consists of :-The System consists of :-

Bilge PumpBilge Pump: They : They take suction from the bilge sumps from various area in take suction from the bilge sumps from various area in the columns, pontoons, Machinery spaces and discharge it either the columns, pontoons, Machinery spaces and discharge it either overboard or to the bilge holding tank for further treatment.overboard or to the bilge holding tank for further treatment. They also take suction from ballast line for stripping operation.They also take suction from ballast line for stripping operation.

Page 4: Marine Systems

44

Bilge SystemBilge System contd.contd.

PipingPiping: : consists of suction lines from various compartments, consists of suction lines from various compartments, leading to the pumps and discharge line to overboard or to the bilge leading to the pumps and discharge line to overboard or to the bilge holding tank.holding tank.

.. The Water from the compartments are led through the The Water from the compartments are led through the scuppers / drains to the Header pipe, which should be generally scuppers / drains to the Header pipe, which should be generally located at the lowest position.located at the lowest position.

.. Mud boxes are generally installed in the pipe line for Mud boxes are generally installed in the pipe line for sedimentation of dirts.sedimentation of dirts.

Oily Water SeparatorOily Water Separator: They are generally used in this : They are generally used in this system to separate oil and water, so that the water which is system to separate oil and water, so that the water which is discharged overboard meets the MARPOL requirement.discharged overboard meets the MARPOL requirement.

Page 5: Marine Systems

55

Bilge SystemBilge System contd.contd.

BILGE SYSTEMBILGE SYSTEM

Page 6: Marine Systems

66

Ballast SystemBallast System This system is used to keep the Vessel afloat and maintain stability.This system is used to keep the Vessel afloat and maintain stability.

A chamber in the bottom of the hull called as Ballast tanks are filled with A chamber in the bottom of the hull called as Ballast tanks are filled with sea water to provide this ballast.sea water to provide this ballast.

The System consists of :-The System consists of :-

Ballast PumpBallast Pump: : They They take suction from the Sea Chest and discharge to take suction from the Sea Chest and discharge to ballast Tanks at the time of ballasting operation, they can also take suction ballast Tanks at the time of ballasting operation, they can also take suction from ballast tanks and discharge water into the Sea at the time of de from ballast tanks and discharge water into the Sea at the time of de ballasting operation.ballasting operation.

PipingPiping: Connects all the Ballast Tanks. There are Suction Manifolds at the : Connects all the Ballast Tanks. There are Suction Manifolds at the end of each pipe line.end of each pipe line.

These manifolds are arranged in such a way that pumps can take These manifolds are arranged in such a way that pumps can take suction either from the sea chest or from the Ballast Tanks. Flow in these suction either from the sea chest or from the Ballast Tanks. Flow in these lines are bidirectional, lines are bidirectional, so Non return Valves are not to be installed in the so Non return Valves are not to be installed in the Ballast line.Ballast line.

Page 7: Marine Systems

77

Ballast SystemBallast System contd.contd.

BALLAST SYSTEMBALLAST SYSTEM

Page 8: Marine Systems

88

Fuel Oil SystemFuel Oil System

This system is used primarily as a fuel supply to Main Engines, This system is used primarily as a fuel supply to Main Engines, Auxiliary Engines and Other Equipments running on Diesel oil.Auxiliary Engines and Other Equipments running on Diesel oil.

Fuel Oil are sometimes mixed with the Drilling mud for Drilling Fuel Oil are sometimes mixed with the Drilling mud for Drilling purpose.purpose.

The System consists of :-The System consists of :-

Fuel Oil Transfer PumpFuel Oil Transfer Pump: : Diesel fuel is taken onboard through the Diesel fuel is taken onboard through the loading / Bunkering stations located at the Main deck Port / Stbd loading / Bunkering stations located at the Main deck Port / Stbd and delivered to Fuel oil storage tanks.and delivered to Fuel oil storage tanks.

Fuel oil is then transferred from the Storage tank to the Settling tank Fuel oil is then transferred from the Storage tank to the Settling tank through the Flow meter. through the Flow meter.

Fuel Oil purifierFuel Oil purifier:: Fuel oil from the Settling tank is purified and stored Fuel oil from the Settling tank is purified and stored in the day tank. in the day tank.

Page 9: Marine Systems

99

Fuel oil SystemFuel oil System contd.contd.

Fuel Oil Service PumpFuel Oil Service Pump: : They They deliver Fuel Oil from the day tanks to deliver Fuel Oil from the day tanks to Service Outlets at various locations.Service Outlets at various locations.

PipingPiping:: Pipes are routed from Bunkering / Loading station to Pipes are routed from Bunkering / Loading station to storage tanks. storage tanks.

Fuel oil can be transferred from storage tanks to settling tanks, from Fuel oil can be transferred from storage tanks to settling tanks, from settling tanks to day tanks, from day tanks to Main Engines and to settling tanks to day tanks, from day tanks to Main Engines and to service outlets throughout the rig via service pumps.service outlets throughout the rig via service pumps.

Page 10: Marine Systems

1010

Fuel oil SystemFuel oil System contd.contd.

FUEL OIL SYSTEMFUEL OIL SYSTEM

Page 11: Marine Systems

1111

Lube Oil and Dirty Oil SystemLube Oil and Dirty Oil System

Lube oil system is used to supply lube oil to the Main engines and Mud Lube oil system is used to supply lube oil to the Main engines and Mud pumps.pumps.

Dirty Oil system is used to remove contaminated lube oil and fuel oil from Dirty Oil system is used to remove contaminated lube oil and fuel oil from the equipment to a waste oil tank. The dirty oil is then transferred to loading the equipment to a waste oil tank. The dirty oil is then transferred to loading vessel through a MARPOL discharge connection at Port and Stbd.vessel through a MARPOL discharge connection at Port and Stbd.

The System consists of :-The System consists of :-

Lube Oil Transfer PumpLube Oil Transfer Pump: : Lube oil from the tank inside the Engine Room and Lube oil from the tank inside the Engine Room and Mud Pump Room are fed to the equipment by Lube oil transfer pumps.Mud Pump Room are fed to the equipment by Lube oil transfer pumps.

Hand PumpHand Pump:: They are used to transfer Lube oil from Portable drums to the They are used to transfer Lube oil from Portable drums to the Lube oil tanks.Lube oil tanks.

Page 12: Marine Systems

1212

Lube Oil and Dirty Oil SystemLube Oil and Dirty Oil System contd.contd.

PipingPiping:: Pipes are used for transferring the lube oil from the respective LO Pipes are used for transferring the lube oil from the respective LO service tanks, to the main generators and to mud pumps. All the waste oil is service tanks, to the main generators and to mud pumps. All the waste oil is collected in waste oil tank generally located in column. collected in waste oil tank generally located in column.

The waste oil pump takes suction from the waste oil tank and discharge The waste oil pump takes suction from the waste oil tank and discharge back to waste oil tank or to Main Deck Marpol discharge connections at back to waste oil tank or to Main Deck Marpol discharge connections at Port/Stbd. Port/Stbd.

Page 13: Marine Systems

1313

Lube Oil and Dirty Oil SystemLube Oil and Dirty Oil System contd.contd.

LUBE OIL SYSTEMLUBE OIL SYSTEM

Page 14: Marine Systems

1414

Lube Oil and Dirty Oil SystemLube Oil and Dirty Oil System contd.contd.

DIRTY OIL SYSTEMDIRTY OIL SYSTEM

Page 15: Marine Systems

1515

Compressed Air SystemCompressed Air SystemService air SystemService air System

The purpose of the service air system is to provide high quality compressed The purpose of the service air system is to provide high quality compressed air to rig equipment, service outlets ,bulk air reducing station and equipment air to rig equipment, service outlets ,bulk air reducing station and equipment

operation.operation. The purpose of the control air system is to provide high quality compressed The purpose of the control air system is to provide high quality compressed

air to fire dampers, tank gauging system and instrument control.air to fire dampers, tank gauging system and instrument control. The System consists of :-The System consists of :-

Service Air CompressorService Air Compressor: : They increase the pressure of Gas or They increase the pressure of Gas or vapor by compressing it and producing compressed air for vapor by compressing it and producing compressed air for Pneumatic application.Pneumatic application.

Service Air DryersService Air Dryers:: The Compressed air passes through the Dryer The Compressed air passes through the Dryer to eliminate the Moisture content in it.to eliminate the Moisture content in it.

Service Air receiverService Air receiver: : They are used to store the compressed air.They are used to store the compressed air.

Page 16: Marine Systems

1616

Compressed Air System Compressed Air System contd. contd. Service air SystemService air System

PipingPiping:: Piping runs from the Service Air compressors to Piping runs from the Service Air compressors to the air receivers, then to the air dryers. Air is piped into the air receivers, then to the air dryers. Air is piped into the ring header from the air receivers. Relief valves from the ring header from the air receivers. Relief valves from the system are vented to the main deck. Sea water the system are vented to the main deck. Sea water piping supplies cooling water to the air compressors.piping supplies cooling water to the air compressors.

Page 17: Marine Systems

1717

Compressed Air System Compressed Air System contd. contd.

SERVICE AIR SYSTEMSERVICE AIR SYSTEM

Page 18: Marine Systems

1818

Compressed Air System Compressed Air System contd. contd.

Starting air SystemStarting air System

PipingPiping:: Piping runs from the Starting Air compressors to Piping runs from the Starting Air compressors to the Starting air receivers. Air is piped into the header the Starting air receivers. Air is piped into the header from the air receivers. Relief valves from the system are from the air receivers. Relief valves from the system are vented to the main deck. They are used to provide air vented to the main deck. They are used to provide air supply for generator to start.supply for generator to start.

Page 19: Marine Systems

1919

Compressed Air System Compressed Air System contd. contd.

STARTING AIR SYSTEMSTARTING AIR SYSTEM

Page 20: Marine Systems

2020

Potable Water SystemPotable Water System The purpose of the potable water system is to supply clean and treated The purpose of the potable water system is to supply clean and treated

water for drinking, cooking, washing and machinery services.water for drinking, cooking, washing and machinery services.

Potable water is stored in the storage tank and pumped to a pressure set Potable water is stored in the storage tank and pumped to a pressure set tank. From pressure tank, water is distributed through a U.V sterilizer. tank. From pressure tank, water is distributed through a U.V sterilizer. This treated water is then delivered to Living quarters for basic utilities.This treated water is then delivered to Living quarters for basic utilities.

Fresh water can be generated on board by means of Water Maker or it can Fresh water can be generated on board by means of Water Maker or it can also be supplied externally from the filling stations.also be supplied externally from the filling stations.

The System consists of :-The System consists of :-Potable water PumpPotable water Pump: : Water from the storage tank which is generally located Water from the storage tank which is generally located at the bottom hull is fed to the Pressure Tank by means of Potable water at the bottom hull is fed to the Pressure Tank by means of Potable water pumps.pumps.Hydrophore tankHydrophore tank: : It is a pressure tank, which is under pressure by means of It is a pressure tank, which is under pressure by means of compressed air, the level of water inside the tank is maintained by virtue of compressed air, the level of water inside the tank is maintained by virtue of pressure of compressed air inside the tank.pressure of compressed air inside the tank.

Page 21: Marine Systems

2121

Potable Water System Potable Water System contd.contd.

Activated Carbon filterActivated Carbon filter: : They are used to eliminate the impurities and bad They are used to eliminate the impurities and bad odour.odour.

UV SterilizerUV Sterilizer: : They are used to eliminate the impurities and disinfect the They are used to eliminate the impurities and disinfect the water to make it fit for drinking.water to make it fit for drinking.

PipingPiping: : Pipe line runs from Bunkering stations to the storage tanks, Potable Pipe line runs from Bunkering stations to the storage tanks, Potable water is fed into the Hydrophore tank by means of Potable water pump and water is fed into the Hydrophore tank by means of Potable water pump and there after it passes through the Activated carbon filter, through the UV there after it passes through the Activated carbon filter, through the UV Sterilizer it is conveyed to the Living Quarters for basic utilities.Sterilizer it is conveyed to the Living Quarters for basic utilities.

Page 22: Marine Systems

2222

Potable Water System Potable Water System contd.contd.

POTABLE WATER SYSTEMPOTABLE WATER SYSTEM

Page 23: Marine Systems

2323

Fire fighting SystemFire fighting SystemFire Main SystemFire Main System

The purpose of the fire main system is to extinguish fire.The purpose of the fire main system is to extinguish fire. Normally the medium used is sea water. This System is provided with two (2) Fire Normally the medium used is sea water. This System is provided with two (2) Fire

pumps one working and one stand-By located at different compartments, so that a pumps one working and one stand-By located at different compartments, so that a fire or flooding in one compartment will not put both the pumps to stall.fire or flooding in one compartment will not put both the pumps to stall.

The distribution header is arranged in a Ring Main manner, Sea water at a required The distribution header is arranged in a Ring Main manner, Sea water at a required pressure by means of a jockey pump is distributed to the various fire stations on pressure by means of a jockey pump is distributed to the various fire stations on board the vessel.board the vessel.An international shore connection is provided at Port and Stbd so that water can be An international shore connection is provided at Port and Stbd so that water can be supplied to the ring header from an external source.supplied to the ring header from an external source.

The System consists of :-The System consists of :-Fire water PumpFire water Pump: : SeaSea Water from the Sea chest is fed to the Pressure Tank by Water from the Sea chest is fed to the Pressure Tank by means of Fire water pumps.means of Fire water pumps.

Hydrophore tankHydrophore tank: : It is a pressure tank, which is under pressure by means of It is a pressure tank, which is under pressure by means of compressed air, the level of water inside the tank is maintained by virtue of pressure compressed air, the level of water inside the tank is maintained by virtue of pressure of compressed air inside the tank.of compressed air inside the tank. Fire StationsFire Stations: : They are located at different locations on board a vessel, It consists of They are located at different locations on board a vessel, It consists of hose, hose reels and jet nozzles to discharge water for fire fighting purpose.hose, hose reels and jet nozzles to discharge water for fire fighting purpose.

Page 24: Marine Systems

2424

PipingPiping: : Sea water is taken in through the Sea chest and Sea water is taken in through the Sea chest and is fed into the Hydrophore tank by means of Fire water is fed into the Hydrophore tank by means of Fire water pump and there after it passed to the Ring main header. pump and there after it passed to the Ring main header. An international shore connection is provided at Port An international shore connection is provided at Port and Stbd so that water can also be supplied to the ring and Stbd so that water can also be supplied to the ring header from an external source.header from an external source.Branch piping from the Ring main are connected to the Branch piping from the Ring main are connected to the Fire stations at different locations.Fire stations at different locations.

Fire fighting System Fire fighting System contd.contd. Fire Main SystemFire Main System

Page 25: Marine Systems

2525

Fire fighting System Fire fighting System contd.contd.

FIRE MAIN SYSTEMFIRE MAIN SYSTEM

Page 26: Marine Systems

2626

This a dry fire protection system, generally provided for This a dry fire protection system, generally provided for compartments like Engine room, Emergency generator compartments like Engine room, Emergency generator room, paint locker room, galley hood etc which has the room, paint locker room, galley hood etc which has the potential to cause firepotential to cause fire

The system is equipped with Audio and visual alarms in The system is equipped with Audio and visual alarms in the protected spaces to alert personals to evacuate from the protected spaces to alert personals to evacuate from alarmed spaces. Prior to release of CO2 the room alarmed spaces. Prior to release of CO2 the room ventilation fans and fire dampers will be shut down.ventilation fans and fire dampers will be shut down.

Fire fighting System Fire fighting System contd.contd. COCO22 System System

Page 27: Marine Systems

2727

Fire fighting System Fire fighting System contd.contd.

COCO22 SYSTEM SYSTEM

Page 28: Marine Systems

2828

This a Wet fire protection system, generally provided for This a Wet fire protection system, generally provided for accommodation area.accommodation area.Normally, the system is filled with fresh water and pressurized by Normally, the system is filled with fresh water and pressurized by the compressed air for initial operation. Subsequently water is the compressed air for initial operation. Subsequently water is supplied from the Fire main header.supplied from the Fire main header.

Each sprinkler header is fitted with a flow switch and any flow of Each sprinkler header is fitted with a flow switch and any flow of water through this header is detected by the flow switch, which water through this header is detected by the flow switch, which activates an alarm in the control panel.activates an alarm in the control panel.

When the pressure in the Sprinkler system drops below the fire When the pressure in the Sprinkler system drops below the fire main pressure, the fire pumps starts and supplies water to the main pressure, the fire pumps starts and supplies water to the sprinkler system.sprinkler system.

Fire fighting System Fire fighting System contd.contd. Sprinkler SystemSprinkler System

Page 29: Marine Systems

2929

Sanitary SystemSanitary System

The purpose of the sanitary system is to flush off WCs and urinals.The purpose of the sanitary system is to flush off WCs and urinals.The flushing water is stored in a holding tank. The pump takes The flushing water is stored in a holding tank. The pump takes suction from the holding tank and discharge the water to the suction from the holding tank and discharge the water to the pressure set tank, which is charged up by compressed air. The pressure set tank, which is charged up by compressed air. The water in the system is then pressurized to preset valve.water in the system is then pressurized to preset valve.A flushing control valve is installed at each unit for open / close A flushing control valve is installed at each unit for open / close control. control.

The System consists of :-The System consists of :-Sanitary water PumpSanitary water Pump: : SeaSea Water from the Sea chest is fed to the Water from the Sea chest is fed to the Pressure Tank by means of Sanitary water pumps. Pressure Tank by means of Sanitary water pumps. Pressure set tankPressure set tank: : It is a pressure tank, which is under pressure by It is a pressure tank, which is under pressure by means of compressed air, the level of water inside the tank is means of compressed air, the level of water inside the tank is maintained by virtue of pressure of compressed air inside the tank.maintained by virtue of pressure of compressed air inside the tank.

Page 30: Marine Systems

3030

Sanitary System Sanitary System contd.contd.

SANITARY WATER SYSTEMSANITARY WATER SYSTEM

Page 31: Marine Systems

3131

Sanitary System Sanitary System contd. contd. Sanitary Drainage systemSanitary Drainage system

The purpose of the Sewage Treatment System is to treat Black drain water from The purpose of the Sewage Treatment System is to treat Black drain water from toilets, in order to comply with MARPOL requirements for the quality of discharged toilets, in order to comply with MARPOL requirements for the quality of discharged effluent. Grey water from sinks and showers go directly overboard during normal effluent. Grey water from sinks and showers go directly overboard during normal operations.operations. The waste from the water closet, urinal and hospital drain is drained to Sewage The waste from the water closet, urinal and hospital drain is drained to Sewage holding tank to prevent contamination. The clean drain from basins, washing holding tank to prevent contamination. The clean drain from basins, washing machines and drinking fountains are discharged overboard.machines and drinking fountains are discharged overboard.A Sewage treatment unit is installed to process the waste and then discharge A Sewage treatment unit is installed to process the waste and then discharge overboard. Untreated wastes can also be discharged to another vessel through the overboard. Untreated wastes can also be discharged to another vessel through the MARPOL discharge station.MARPOL discharge station.

The System consists of :-The System consists of :-Sewage treatment plantSewage treatment plant: : The Sewage Treatment Unit operates on the extended The Sewage Treatment Unit operates on the extended aeration principleaeration principle and are usedand are used to process the waste and then discharge sewage to process the waste and then discharge sewage overboard. overboard. Sewage transfer pumpSewage transfer pump: : They are usedThey are used to Transfer the Sewage from Holding tank to to Transfer the Sewage from Holding tank to STP.STP.Centrifugal Blower / Rotary air compressorCentrifugal Blower / Rotary air compressor:: They are used to produce air for They are used to produce air for promoting digestion by bacteria.promoting digestion by bacteria.

Page 32: Marine Systems

3232

Sanitary System Sanitary System contd. contd. Sanitary Drainage systemSanitary Drainage system

Grease trapGrease trap: : They separate the greasy oily They separate the greasy oily lumps formed at the galley before the waste lumps formed at the galley before the waste sewage is collected in the Holding tank. sewage is collected in the Holding tank.

OBD pumpOBD pump: : They are usedThey are used to dump the treated to dump the treated Sewage out of the vessel.Sewage out of the vessel.

Page 33: Marine Systems

3333

Sanitary System Sanitary System contd.contd.

Sanitary Drainage systemSanitary Drainage system

SANITARY DRAIN SYSTEMSANITARY DRAIN SYSTEM

Page 34: Marine Systems

3434

Refrigerant SystemRefrigerant System

The purpose of the refrigeration system is to cool down The purpose of the refrigeration system is to cool down and maintain a reduced room temperature in the Chiller and maintain a reduced room temperature in the Chiller Room (4 Room (4 C) and Freezer Room (-25 C) and Freezer Room (-25 C) for preservation C) for preservation of foodstuffs.of foodstuffs.

R-404A grade refrigerant is generally used in this R-404A grade refrigerant is generally used in this system system

The System consists of :-The System consists of :-CompressorCompressor: : They increase the pressure of Refrigerant They increase the pressure of Refrigerant Gas by compressing it.Gas by compressing it.CondenserCondenser: : It cools the compressed refrigerant gas and It cools the compressed refrigerant gas and changes its state into liquid form.changes its state into liquid form.

Page 35: Marine Systems

3535

Refrigerant System Refrigerant System contd. contd.

ReceiverReceiver: : It is a vessel in which any gas in the It is a vessel in which any gas in the refrigerant is separated.refrigerant is separated.Only liquid refrigerant is allowed to pass beyond this Only liquid refrigerant is allowed to pass beyond this stage. stage. Expansion ValveExpansion Valve: : It is used to lower the pressure and It is used to lower the pressure and hence increasing the volume of the refrigerant.hence increasing the volume of the refrigerant. EvaporatorEvaporator: : The chamber in which the exchange of heat The chamber in which the exchange of heat takes place.takes place.

Page 36: Marine Systems

3636

Refrigerant System Refrigerant System contd.contd.

REFRIGERANT SYSTEMREFRIGERANT SYSTEM

Page 37: Marine Systems

3737

Deck drainage SystemDeck drainage System

The purpose of this system is provided for The purpose of this system is provided for gravity draining of waste water from deck to gravity draining of waste water from deck to either a bilge holding tank or overboard.either a bilge holding tank or overboard.

Clean water is let out directly by over board Clean water is let out directly by over board discharge line, as per MARPOL requirement oily discharge line, as per MARPOL requirement oily water has to be collected in a bilge holding tank, water has to be collected in a bilge holding tank, Oil has to be separatedOil has to be separatedby passing it into the OWS before sending it by passing it into the OWS before sending it over board.over board.

Page 38: Marine Systems

3838

Deck drainage System Deck drainage System contd. contd.

DECK DRAINAGE SYSTEMDECK DRAINAGE SYSTEM

Page 39: Marine Systems

3939

Engine cooling SystemEngine cooling SystemSea water coolingSea water cooling

The purpose of the Engine cooling system is to dissipate The purpose of the Engine cooling system is to dissipate heat produced by the engine during operation.heat produced by the engine during operation.

This part of engine cooling is low temperature and of This part of engine cooling is low temperature and of open loop type. The sea water cooling pump takes open loop type. The sea water cooling pump takes suction from sea chest header and discharges to the suction from sea chest header and discharges to the engine heat exchanger. The low temperature sea water engine heat exchanger. The low temperature sea water then exchanges heat with high temperature fresh water, then exchanges heat with high temperature fresh water, the heated water is discharged overboard.the heated water is discharged overboard.

Fresh water is circulated to Lube Oil cooler and charge Fresh water is circulated to Lube Oil cooler and charge air cooler.air cooler.

Page 40: Marine Systems

4040

Engine cooling System Engine cooling System contd.contd.

Fresh water coolingFresh water cooling

This part of engine cooling is high temperature This part of engine cooling is high temperature and of closed loop type. The built in engine fresh and of closed loop type. The built in engine fresh water cooling pump takes suction from the water cooling pump takes suction from the expansion tank.expansion tank.

Fresh water is circulated to an Oil cooler, after Fresh water is circulated to an Oil cooler, after cooler, cylinder block and cylinder head. cooler, cylinder block and cylinder head.

The high temperature fresh water is cooled The high temperature fresh water is cooled down by the low temperature sea water through down by the low temperature sea water through a heat exchanger .a heat exchanger .

Page 41: Marine Systems

4141

Engine cooling System Engine cooling System contd. contd.

ENGINE COOLING SYSTEMENGINE COOLING SYSTEM

Page 42: Marine Systems

4242

Engine Exhaust SystemEngine Exhaust System

The purpose of this system is to vent out the The purpose of this system is to vent out the exhaust gasses to atmosphere from an internal exhaust gasses to atmosphere from an internal combustion engine.combustion engine.

The exhaust gases should be kept away from The exhaust gases should be kept away from the ventilation intake ducts and walk way area.the ventilation intake ducts and walk way area.

These pipes are to be supported in such a way These pipes are to be supported in such a way that the pipes should be free to expand and that the pipes should be free to expand and contract due to temperature change.contract due to temperature change.

Page 43: Marine Systems

4343

Engine Exhaust SystemEngine Exhaust System contd.contd.

The System consists of :- The System consists of :-

Spark arresting silencerSpark arresting silencer: : It is used to arrest sparks or It is used to arrest sparks or small flames of fire, which travels along with the exhaust small flames of fire, which travels along with the exhaust gases produced by the IC engine.gases produced by the IC engine.Expansion bellowExpansion bellow: : It is used to accommodate the It is used to accommodate the expansion and contraction in Exhaust pipes due to expansion and contraction in Exhaust pipes due to temperature change.temperature change.

Page 44: Marine Systems

4444

Engine Exhaust SystemEngine Exhaust System contd. contd.

ENGINE EXHAUST SYSTEMENGINE EXHAUST SYSTEM