Operation diesel generators on ships

Construction - Advantages and disadvantages of Globe valves

Construction - Advantages and disadvantages of Gate valves

Installation Procedures Butterfly valves???

Some note when installing and using the Butterfly valves

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).

 1. Prepare to start the machine

- Check and open the DO oil valves, lubricants, water cooling properly;

- Checking the viscosity of sand oil, speed regulator, turbocharger, generator base oil ...

- Check and add to the expansion tank;

- Check the oil level, (FO) in the service tank, filter full of oil tank, water discharge, oil tank;

- Filling up the starter bottle, flushing water and wind system;

- Hand pump (or pump) about 10 minutes;

- Via machine by hand via about 8 loops;

- open-drain on the cylinder cover;

- Open the wind start, turn the engine by the wind start (tread-machine), observe when the discharge is anything unusual. If it is normal, it should be flushed;

- Start the machine at low rev. Monitoring the engine parameters, if normal, increase the rotation slowly to the revolutions;

- Wait for the exhaust gas temperature of the cylinder to stabilize (the machine for about 10 minutes), conduct electricity into the grid. Adjusting and increasing the load gradually for new machines;

- Oil FO and change to oil FO for the machine (if the equipment running FO).


   2. Monitor and care when the machine is operating

- Check the status of the machine: sound and vibration.

- Check the exhaust temperature, coolant temperature from the cylinder;

- Check the level and temperature of the exhaust gas turbine lubricant;

- Checking the temperature and pressure of the turbocharged air;

- Check the temperature, lubricant pressure (Lub.Oil), cooling water (CFW), cooling water (SW), fuel DO (FO);

- Check the load of the generator (kW) on the main electrical panel and its parameters such as voltage, frequency and current. Depending on the load of the ship, one or two generators may operate simultaneously:

- Record the parameters every 2 hours;

- Keep clean and clean outside of the machine before delivery to the next shift.

(Note: There are parameters to note, should notify the following, write on the board for everyone to know).


  Steps to turn off the lights.

- Perform oil change from FO to DO and run for about 15 minutes to fully utilize DO (if running FO);

- Reduce the load to the machine until the power meter indicator is about 5 kW, the load is completely off;

- Reduces the rotation of the machine to near the revolving revolutions;

- Run for about 10 minutes to cool down, then turn off the computer;

- open the flush-case on the cylinder;

- Turn the air blow (blow air) to scavenge the gas and blowing the soot clean the combustion chamber;

- Lubricating pump and machine via 10 rounds;

- Close the starter valves, lubricants, coolant and related valves (if needed).


     4. Synchronous 2 generators

4.1 Synchronization condition Two synchronous generators operate in parallel:

(1) The voltage of two generators must be equal (U1 = U2)

(2) The frequency (Hz) of the two transmitters must be equal (F1 = F2)

(3) The phase voltages of two generators must coincide (angle U1, U2 = 0)

(4) Correct order of phase

In practice on ships, when synchronizing two generators by hand or by automatic air conditioning must also check the above conditions. People use the method of light (off lights or rotors) or use "synchronous" combined with the "voltmeter".


4.2 Synchronized steps

- Adjust the rotation (Hz) of two machines equally

- Check the voltage of two generators equally (if deviation, must adjust)

- If automatic "automatic" only to turn on the "select" switch to the machine needs to (new) and press the "parallel" button, the system will automatically adjust and network for two machine working in parallel

- In the case of "manual" connection: After adjusting the two machines in terms of frequency and voltage, turn on the "select" switch to the air conditioner, followed by the "synchronous clock". When seeing three lights with the same brightness and needles of the "synchronous" only 12 hours then quickly shut off the two-transmitter. Then adjust the parameters of the two machines to match each other.



4.3 Disconnect one machine

When the two machines are working in parallel, to cancel the load must do the following:

- Change the oil to DO for load-breaker (if the machine runs FO).

- The transmitter's output switches off for the active machine.

- When the load of the machine is about 5 Kw off the main bridge or press the "OFF"

- Reduce the rotation of the machine to turn off and to run about 10 minutes for the machine to reduce the temperature.

- Turn off the machine completely and take the rest of the machine.

Generator Engine (G / E) are an important device on board, most of the equipment on board is powered by light sources. The fuel used for lighters is usually DO, some of which are HFOs, but when stopped, they switch to DO. For the purpose of making the Generator Engine (G / E) work safely, stably and efficiently, the operator needs to look after the equipment while the machine is operating, periodically maintenance Generator Engine (G / E) according to the manual and the manual. And it is important to start, synchronize, change oil and stop the engine according to the steps mentioned.


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