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icedcappucino started the topic Positive displacement pump in the forum Pumps 4 years, 3 months ago
Positive Displacement Pumps
These pumps work on principle of trapping the fluid and pushing it forward/out. Fixed volume of fluid is trapped in suction side and pushed/squeezed to the discharge side. These pumps can be:
1. Reciprocating type.
2. Gear type.
3. Vane type.
4. Screw type.
5. Diaphragm type.
Since these pumps work on moving fixed…[Read more] -
icedcappucino started the topic Centrifugal pump in the forum Pumps 4 years, 3 months ago
These Pumps produce a head and a flow by increasing the velocity of the liquid that passes through the machine with the help of the rotating vane/ impeller. Pump impeller traps the liquid and accelerates the fluid. The casing of pump is designed to convert the rotation kinetic energy to hydrodynamic energy of flow (pressure). The amount of flow…[Read more]
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icedcappucino started the topic Soot Fire in EGB/EGE in the forum Boilers 4 years, 3 months ago
SOOT FIRES CANNOT OCCUR IN A HEAT EXCHANGER WHICH IS FREE OF SOOT DEPOSITS
Soot deposits occur in diesel engines running on heavy fuels generally when running at light load, or when manoeuvring where no exhaust gas bypass exists. These deposits may also contain excess cylinder lubricating oil and are highly susceptible to ignition once engine…[Read more]
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icedcappucino started the topic Introduction to EGB and EGE in the forum Boilers 4 years, 3 months ago
It is the responsibility of the Chief Engineer to ensure that all members of the Engine room Staff are familiar with the procedures for the safe operation and maintenance of the exhaust gas boiler/economizers. Principles of safe operation, such as ensuring that valves and mountings are operational and correctly set and the necessity to warm…[Read more]
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icedcappucino started the topic Introduction to Boiler in the forum Boilers 4 years, 3 months ago
OPERATION
During anchorages and port stays, aux boiler is to be run in auto mode. Ensure the pilot burner and main burner are in good condition and ensure exhaust gas is not SMOKY. Smoke sensor where fitted should be monitored. HFO temp at burner inlet to be checked from the FO analysis report. Local regulations regarding type of fuel/ Sulphur…[Read more] -
icedcappucino replied to the topic Boiler flash up procedure in the forum Boilers 4 years, 3 months ago
PRECAUTIONS PRIOR TO LIGHTING BOILERS
The Engineer Officer in charge of this process must ensure that procedural checks are carried out. These include but not limited to:
• That all system valves and boiler mountings are operational and correctly set.
• That the boiler is filled to the requisite level to allow for expansion with correctly dos…[Read more] -
icedcappucino started the topic Introduction to Aux Engine in the forum Main & Aux Engine 4 years, 3 months ago
STARTING PROCEDURE
The below instructions are to be followed whenever starting a diesel generator under normal circumstances. The remote starting must also be frequently tested to ensure that it is in order. The generator engines will normally be set for automatic starting and must be in this position before the engine room operates in an unmanned…[Read more] -
icedcappucino replied to the topic Main engine slow steaming in the forum Main & Aux Engine 4 years, 3 months ago
The purpose of this procedure is to provide guidance on the minimum continuous running speeds of the main engine.
Chief Engineer shall:
• Advise the Master of minimum safe continuous running speed of the main engine.
• Inform engineering staff of operating conditions.
Duty Engineer shall:
• Monitoring main engine running parameters.
• Ensure…[Read more] -
icedcappucino replied to the topic Oil mist detector maintenance & Crankcase relief valve regulation in the forum Main & Aux Engine 4 years, 3 months ago
OIL MIST DETECTOR
All alarms from oil mist detectors, no matter how suspect the instrument may be, are to be treated as an emergency situation and the engine stopped. Alarms must be reported to the Office immediately. Remember there are no false alarm. Alarm will be activated only if the conducive alarm condition is generated. If the equipment is…[Read more] -
icedcappucino started the topic Introduction to Turbocharger in the forum Main & Aux Engine 4 years, 3 months ago
TURBOCHARGERS
Turbochargers must always be in good condition to obtain the expected engine performance and meet current emission standards. Turbochargers can be pulse type, constant flow type, jet assist type. Refer to the maker’s manual for proper operation and maintenance. Ensure that turbocharger air intake filters are maintained clean at all t…[Read more] -
icedcappucino started the topic M/E Scavenge Fire in the forum Main & Aux Engine 4 years, 3 months ago
Scavenge Fires (2- Strokes)
Fires in the scavenge spaces of diesel engines can be caused by wear of mechanical components, faulty fuel injection, inefficient exhaust system and incorrect cylinder lubrication. Scavenges spaces shall be drained regularly each day and manually cleaned on a regular basis, but not exceeding 2 months so that the risk of…[Read more] -
icedcappucino replied to the topic Crankcase explosion & inspection in the forum Main & Aux Engine 4 years, 3 months ago
Early detection of over-heating and the prompt slowing down or stopping of the main engine as circumstances permit, will avoid conditions which might form an explosive mist in the crankcase.
In the majority of cases oil mist detectors are fitted to main engine crankcase to detect any buildup of a potentially explosive oil mist. All alarms from oil…[Read more] -
icedcappucino started the topic M/E preparation for Departure in the forum Main & Aux Engine 4 years, 3 months ago
Warming Through:
Main engines are to be warmed through gradually following a stay in port or other occasion when they have been shut down to 65 degC. The jacket water circulation temperature is to be raised over a period of time to as near as is possible the operating temperature. The period of time is dependent on the jacket water temperature…[Read more] -
icedcappucino replied to the topic Our cadetship true stories in the forum Before cadetship 4 years, 4 months ago
First!
The very first training officer (Second Engineer) I met was an African, around 50s. He was proudly telling me stories about his family, especially his daughter of my age.
First month onboard was mainly spent cleaning and doing my training book assessments.
Around the second month, I started recording main engine parameters as part of…[Read more]
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icedcappucino started the topic Deck crane in the forum Deck Machineries 4 years, 4 months ago
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icedcappucino started the topic General intact stability criteria in the forum Ship Stability 4 years, 5 months ago
For all ships: 👌👇
The following criteria are recommended for passenger and cargo ships:
01. The area under the righting lever curve (GZ Curve) should not be less than 0.055 meter-radians up to θ=30° angle of heel and not less than 0.09 meter-radians up to θ=40° or the angle of flooding θf* if this angle is less than 40°.
02. Additionally, the a…[Read more]
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icedcappucino started the topic Lloyd's Maritime Academy in the forum Further studies 4 years, 5 months ago
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icedcappucino started the topic Beginner's guide to Main Engine Crankcase components in the forum Main & Aux Engine 4 years, 5 months ago
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icedcappucino started the topic Jacket water test and treatment in the forum Fuel Oil, Lub Oil and Water Treatment 4 years, 5 months ago
The purpose is to prevent the following 3 problems:
1) Scale
Produced from hard waters when excessive make-up is required and results in efficiency loss due to drop in heat transfer.2) Corrosion
Usually in the form of general wastage, but pitting, crevice corrosion, galvanic corrosion, stress corrosion and erosion can also occur. The products…[Read more] -
icedcappucino started the topic COL in the forum Meteorology 4 years, 5 months ago
What is COL ??
Area between two high pressure and two low pressures situated alternatively.
Instability – thunderstorms
Stable – radiation fog/ advection fog
– Light variable winds but not for long
– Sudden change of weather is likely
– Relative humidity is fairly high and lightening may be seen
– Thunderstorms frequently associated with a col. - Load More
