Another blessed day has passed and it’s time for the moon to shine. Always hoping for a new and brighter tomorrow longing for the day to be with family again. Just one of the ordinary nights on a seafarer’s life.
As a ship on the high seas is surrounded and held up by water, so are we entirely surrounded and held up by God’s love.
We have onboard the Thermal Oil heaters or Thermal Oil boilers as commonly used term for this system. This heating system heats up our cargo “Bitumen” up to 200 degrees Celcius to maintain the viscosity and can be pumpable for transport and storage.
The thermal oil boiler is one of the essential system of the vessel to keep our cargo within specifications and to supply the vessel with all the heating demands it needs.
A thermal oil boiler fires through a helical coil and generates energy from the hot products of combustion by heating the coil through radiation or convection.
The coil heats the thermal oil of fluid that is being circulated in the system by the circulation pump and expansion tank. The maximum working temperature for our model type is up to 300 degrees Celcius.
Unlike a water or steam boiler, this heating process does not heavily pressurize the system. This heating system is much cheaper to operate and maintain than water boilers.
On my personal opinion and experience the thermal oil boiler is much easier to operate and maintain.
How to check the Main Engine crankshaft deflections?
It is important to check the crankshaft deflection of your engine to monitor the alignment of your crankshaft and save the engine from big troubles and costly repair.
Normally this can be checked at the interval of every 4000 hrs. On the condition of increased vibration of your engine this can be done on a much shorter interval to immediately rectify the misalignment and extend the service life of your engine.
1. Pre-lubricate the engine for a few minutes.
2. Remove crankcase covers at both sides of the crankcase.
3. On the crankweb punched point, mount the dial gauge.
4. Start at cylinder 1 and turn crankshaft clockwise till crankpin is +- 15 after Bottom Dead Center (BDC)
5. Place dial gauge at position ‘A’ in between the center punched points of the counter weight. This is starting point ‘A’ for dial gauge reading.
6. Turn crankshaft till the dial gauge is in position ‘B’ , ‘C’ , ‘D’ , ‘E’ and record the dial gauge reading on each positions.
7. Repeat procedure for the remaining cylinders cranks.
One of the most beautiful and serene places in U.K. I have visited is Eastham. The town is so calm and tranquil, so perfect for soul searching. One can see the different colors of bushes and flowers from their port holes. The very attractive Cherry blossom trees are standing right at terminal’s gate.
Eastham is cited as one of the oldest villages on the Wirral Peninsula and has been inhabited since Anglo Saxon times. The name derived from its location: ham (home) situated to the east of Willaston, which was then the principal settlement.
Eastham Country park is a perfect place where you can play with squirrels and see different kinds of plants and flowers not familiar especially on tropical countries.One of the Eastham Country park attractions that caught my attention were the park benches dedicated to their love ones. “Happy childhood memories dedicated to our Pammy” 1958 to 2014. I have no idea who Pammy was but I’m pretty sure her parents loved her so much. 😍
How do ships produce fresh water out of sea water?
Have you ever wonder how ships seem to have limitless supply of fresh water onboard, despite sailing for days or weeks at sea?
By the name itself, the Fresh Water Generator is the answer to all those questions.
We all know that fresh water is one of the basic needs of life. Onboard the ships water is used for shower, washing, cooking flushing toilets and for cooling various machineries including the Main Engine of the vessel. So it is very important to produce enough fresh water for the continuous operation of the vessel.
How does it work?
The working principle of the fresh water generator is quite simple – Distillation. But the heating medium here is hot water through heat exchangers. It is just boiling the sea water to produce vapor (evaporation) and cool it down (condensation) to produce the fresh water or basically known as distilled water.
The combined brine (sea water)/air ejector driven by the ejector pump creates a vacuum in the system in order to lower the evaporation temperature of the feed water (sea water).
In a normal atmospheric condition the boiling temperature of water is 100°C. But because of the vacuum in the system, the water can boil even at 80°C.
The feed water (sea water) is introduced into the evaporator section through a spring loaded valve orifice and distributed into every second plate channel ( evaporation channels).
The hot water( jacket cooling water) approx. 80 to 90°C is distributed into the remaining channels, thus tranferring its heat to the feed water in the evaporation channels.
Upon reaching the boiling temperature, which is lower than 100°C ( atmospheric pressure) the feed water undergoes a partial evaporation and the mixture of generated vapour and sea water enters the separator vessel where the brine is separated from the vapour and extracted by the brine/ air ejector.
Passing through a demister the vapour enters every second plate channel on the top of the condenser section.
The sea cooling water supplied to the condenser distributes itself into the remaining condenser channels, thus absorbing the heat being transferred from the condensing vapour.
The produced fresh water (distilled) is extracted by the fresh water pump and delivers to the fresh water tank.
A salinometer is fitted on the fresh water pump delivery side to continuously check the actual salinity of the produced fresh water.
They say the bridge, where the captain is in-charge is the brain of the ship, while the engine is the heart of the ship where the chief engr. leads.
Imagine a person who is alive but is brain dead. That person can be considered the living dead. Well, we are all sure a person is dead without the heart functioning. So for all those arguments which department is vital for ship’s operation, the deck or engine department? There goes the answer😉
TYPE : Oil Tanker ( Bitumen), max cargo temp. 250°C, Swedish/Finnish Ice class 1A Super
Gross tonnage : 6556
ENGINE : WÄRTSILÄ 6L38, 4350 KW
The Wärtsilä 38 diesel engine is a 4-stroke, medium speed, turbocharged and intercooled engine with direct fuel injection.
When you see that your oil level in the sight glass is in minimum level, inform the 2nd Engr. immediately so as to plan and carry out the topping up.
1. Be sure to put the appropriate refrigeration oil in the compressor. By using the hand pump with necessary hose connections, pump some oil in a clean bucket to prime the pump, hoses and to ensure that these are free from impurities.
2. Pumping down the system is good but not necessary. Stop and switch off the compressor.
3. Shut the suction and discharge valves of the compressor.
4. Connect the hose coupling to the charging oil valve. Before tightening the coupling connection, pump some oil out to purge it. Tighten the valve.
5. Start pumping oil inside and observe through the sight glass. Maximum level is 3/4 of the sight glass.
6. When the right level is attained, half open the suction valve and slightly open the discharge valve.
7. Start the compressor and slowly open the discharge until full open. Do the same on the suction valve.
8. Observe and do not leave the compressor until normal running condition is confirmed.