Operation of generators on ships
Hi friend! Today I would like introduce for you : "Operation of generators on ships" Generator Engine (G / E) have the function, the task of generating electricity to supply electrical appliances on board. Speaking of light, we often think of a combination of diesel (diesel engine) hybrid generator (Alternator)..
101 Important Things to Check While Starting Fuel Oil Purifier on Ships???
Every engine room machinery system needs systematic step-by-step starting and stopping procedures to ensure smooth running. The number of things to consider while handling ship’s machinery system, depends on aspects such as equipment type, making etc.
An outline of the Maritime Labour Convention 2006 (MLC 2006)
Dear friends! The world currently has about 1.2 million seafarers working on ships, transporting some 90% of global merchandise trade. Facing freight demand is increasing, raising the quality and ensure the rights and obligations of the crew working on the sea is a world problem being very interested. So, on 02/07/2006, at the 54th Conference of the ILO, with the participation of nearly 100 member states, has agreed to build the Maritime Labour Convention 2006 (MLC 2006).
Operating procedures bilge separator machine USH-20 of the company Taiko Kikai
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Types of Mechanical Measuring Tools and Gauges Used on Ships
Machinery onboard ships require regular care and maintenance so that their working life and efficiency can be increased, and the cost of operation, which includes unnecessary breakdowns and spares, can be reduced. For different types of machinery and systems, various measuring tools, instruments and gauges are used on a ship.
Thursday, October 3, 2019
There are some factors need to be considered while selecting the pump that includes the following.
Water pumps are classified into two types namely positive displacement and centrifugal. These pumps are mainly designed for supplying water from one location to another constantly.
Centrifugal Water Pump
Considerations
Positive Displacement Water Pump
Considerations
If we reside in a city or town, we almost don’t think how the water is supplied to our residents every day. Small villages also frequently supply a set-up of pipes to transfer water for every home within the region. All we require to recognize is how to open the valve at the sink. Because the internal working is not visible, and the water supply is not dependent on the neighbors down the road. Every home has owned well and electromechanical system to draw the water from well and supply to the home. This article discusses an overview of the water pump and its working, types and their applications.
What is Water Pump?
The water pump can be defined as a pump which uses the principles like mechanical as well as hydraulic throughout a piping system and to make sufficient force for its future use. They have been approximately in one structure otherwise another because of early civilization. At present these pumps are utilized within a wide range of housing, farming, municipal, and manufacturing applications.
Water Pump Working Principle
The working principle of a water pump mainly depends upon the positive displacement principle as well as kinetic energy to push the water. These pumps use AC power otherwise DC power for energizing the motor of the water pump whereas others can be energized other kinds of drivers like gasoline engines otherwise diesel.
The water pump is a portable device and can be applied in several household applications. These pumps are used for pumping the huge amount of water from one place to another. The main purpose of a water pump is versatile. A quality pump which can be selected carefully may be perfect for draining water from a low flooded region, refilling the swimming pool, and bathtub, circulating pesticides otherwise fertilizers.
The collection of water pumps are very large, therefore, while selecting a strong and consistent one, one should think about the requirement.
Lift Piston Pump
Force Pump
Axial Piston Pump
Radial Piston Pump
The piston pump is strong, as well as simple devices. These pumps are made with a chamber, a piston, and a couple of control devices. These pumps function by flowing downward into the chamber, thus reducing the media within a hand pump. When the air pressure surpasses from the opening valve spring, then the reduced media can be sent throughout the open exit valve. As the piston is drawn back-up, then it releases the inlet valve & shuts the outlet valve, thus suction can be used to draw in extra media for compression. This article discusses an overview of piston-pump, working, types, etc
What is a Piston Pump?
Piston Pump Working
Advantages
- The range of pressure is wide
- Force can be managed without moving flow rate.
- The rate of flow and Pressure changes has a small outcome on the act.
- Skilled in moving of thick fluids, slurries, as well as abrasives with good control device design.
Disadvantages
- Maintenance cost, & operating is high usually bulky and heavy
- They handle only lesser flow rates
- Flow is Pulsating
Friday, September 27, 2019
Construction - Advantages and disadvantages of Globe valves
Hot works are regularly undertaken during construction and maintenance projects, and have important implications that require active risk management.
Construction - Advantages and disadvantages of Globe valves
I. Check list item preparation for bunkering
1. Plug up each coaming for F.O. Tank air vent & hose connection
2. Plug up all scupper on upper deck
3. Prepare tranceiver or telephone
4. Prepare necessary tools & emergency goods at nearby hose connection: Spanner, Waste rug, Oil pan, Sounding scale, Reducer, etc.
5. Prepere hose davit & Jacob's ladder
6. Following notice shall be hanged onto nearby bunkiering station: Oil Transfer Procedures, Pipe Line Diagram, Oil Pollution Prevention Station, Bunkering Station, Bunkering Plan & Inflammables
7. Prepare fire extinguisher & chemical emulsifier
8. Prepare working light in case of night time
9. Fit on pressure gauge to filling line
10. Confirm operation of remote control valve
11. Put in F.O. Additive if necessary
12. Set up bunkering line (confirm switch off F.O. transfer pump )
II. Check list during bunkering
1. Hoist a B flag
2. Red Light in case night time
3. Confirm hose connection ( oil leak, etc.)
4. Condition of valve operation & oil level in receiving tank
5. Carry out duty & an adequate place by bunkering station
6. Again confirm bunkering line
7. Sounding of oil in receiving tank (every 5 min.)
8. Sounding of oil in not receiving tanks (ever. 15 min.) and received tanks which valve are closed.
Construction - Advantages and disadvantages of Globe valves
(1). Bunkering plan & sequence: disseminated,
explained the content of bunker plan to all the crews.
(2). Bunkering stations: Specify duties for each
engineers, officer & operators.
(3). Bunkering Checklists: disseminated, explained
the content of bunkering checklist.
(4). Communications in English with Hand signals:
(5). Oil Pollution Station: Reviewed duties of each
crew in Oil pollution station.
(7). Oil spill removal procedures with SOPEP: Guided
for all crews about procedure to operate all equipments & material of S.O.P.E.P
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Monday, June 25, 2018
1. Check the fresh water temperature from M / E (62-65 o C) to adjust the heating temperature if needed.
2. Run the main pump (M / E L.O. pump), usually the pump is running.
3. Rotate the cylinders of the cylinder about 70 - 80 times (remember the correct latch when finished)
4. Check that the main unit is fully open (if it is not open, open it)
5. Engage turning gear and turn on turning gear.
Check the L.O level of the M / E sumpt tank, the stern tube tank, the L.O. intermediate axis M / E, the M / E cylinder oil daily tank.
7. Check the L.O level of the L.O tank and lubricate the heater shaft, and run the O / B L.O cir pump (normally the pump is always running).
8. In the process of passing water leakage check on the combustion chamber of the M / E cylinders (if any), check whether there is something unusual in the engine
9. Check the water tank in the oil tank and the oil tank (F.O service tank F.O setting tank).
10. After 20-30 minutes, disengage turning gear and turn off turning gear, flush the bottles and fill up (if missing).
11. After the officer promoted, the discharge.
12. Check the water level in the expansion tank (F.W expansion tank), complement if missing.
13. During the preparation of the main engine, the combination of inspection and operation of other related equipment such as preparation of additional generators, parallel synchronization to prepare for maneuvering ship
Note: For each main engine and the main propulsion system of different ships, we add or subtract some of the steps required to complete the main engine. (Depending on the specific case we have. specific process). And on ship the process of preparing the machine is done by the oiler and the officer is the supervisor, support when needed.
Saturday, June 23, 2018
How to Measure Cylinder Liner Bore Wear on ship?
Types of Mechanical Measuring Tools and Gauges Used on Ships
what type of propeller used on ship? Controllable Pitch Propeller (CPP) Vs Fixed Pitch Propeller (FPP)?
Most of the propellers that are used in ships are fixed pitch propellers (FPP). What does this propeller term means? Let’s understand this from a beginner’s point of view.
But what is a fixed pitch propeller or the FPP?
Advantages and Disadvantages of CPP and FPP
- The controllable pitch propellers can be used to run the ship in forward and astern direction both, without the requirement to change the direction of rotation of the engine. How? Well, the propeller works on the principle of lift generated by each aerofoil section of the blade. What if we can change the orientation of the blade, such that the direction of life force is opposite to what it was during forward running of the ship? That’s exactly what is achieved by changing the pitch angle of the blades, as shown in Figure 2.
- A non-reversible engine can be used for both forward and astern operation of the ship. Hence, the weight of the engine and propulsion machinery is reduced considerably when compared to what is required in propulsion systems equipped with fixed pitch propellers.
- Since the pitch of the propeller determines the amount of thrust generated by the propeller, a change in the pitch angle can bring about a change in the speed of the ship. So, a controllable pitch propeller is useful in changing the speed of the ship without changing the speed or rpm of the main engine. But why are we focusing on this advantage? What happens if we need to reduce the engine rpm to reduce the ship’s speed? Well, many ships have a shaft driven diesel alternator system. So the rpm of the main engine shaft controls the electric power production on board. In that case, if the speed was to be reduced using a fixed pitch propeller, it would require a reduction in the shaft rpm, which would result in reduction of power generated.
- Due to the above reason, the speed of the ship can be handled from the navigation bridge directly. In case of fixed pitch propellers, the marine engineer needs to be intimidated in order to change the ship’s speed. Therefore CPP technology is used for obtaining faster response of speed change.
- The efficiency of astern condition in case of fixed pitch propellers is less than that of controllable pitch propeller in astern condition.
- The pitch control mechanism installed in the hub is complicated enough to demand proper inspection at regular intervals. The installation process is also more complicated as compared to that of fixed pitch propeller system.
- Controllable pitch propellers have a very high initial cost. And this cost increases rapidly with increasing diameter of the propeller.
- Due to pitch control mechanisms housed inside the hub, the length and the diameter of the hub is also high as compared to the fixed pitch propeller systems.
Propeller is the most significant machinery system of the ship. No matter what type of propeller it is, ship owners never make compromises on such important equipment as it directly affects the efficiency and safety of the vessel. Here we discuss about fixed pitch keyless propeller renewal.