Systems On Engines Part – 5

In this post, we shall see how the engine is started. Starting System: Engines are normally started by cranking the running masses of the engine by one of the following means Manual Starting  Battery starting  Compressed Air Startin A) Manual Starting: Manual starting is applied for cranking the engine on very small engines (of less... Continue Reading →

Systems On Engines Part – 4

Fuel Oil Service System: Once the oil is purified and stored in the day tanks, the fuel is drawn to the engine through the service system. The system consists of the following components. Fuel oil circulation pumps:  They have a discharge pressure of about 4 bar. These pumps circulate the oil through the system continuously... Continue Reading →

Systems On Engine – Part 3

Fuel Oil System: Very low-grade fuels are used on Marine Diesel Engines (which are available at low cost) to reduce the fuel cost. These Fuels contain impurities in the form of water and sediments and hence, they are to be purified before spending to the engines. The fuels used are of very high viscosity up to 700... Continue Reading →

Systems On Engine Part – 2

Lubricating oil System: There are a number of components on the engine (like crank pin bearing, crankshaft bearings, camshaft bearings, various moving components etc) which are to be constantly lubricated. Most of the bearings are made of white metal and any failure of the lube oil system will damage the bearings. The lube oil system on... Continue Reading →

Systems On Engine Part – 1

Any diesel engine will have the following systems which are essentially required: Cooling System Lubricating oil system Fuel Oil System Exhaust System Starting System. Let's straight dive into understanding how cooling system works. Fresh Water Cooling System: The cylinder jackets of the engine are cooled by fresh water (sea water is not used since it is corrosive)... Continue Reading →

VAPOUR COMPRESSION DISTILLATION PLANTS (VCDs)

VCD plants are provided on ships where the engine power are less and sufficient heat is not available in the engine cooling water system for producing fresh water in large quantities. These plants are completely independent of other systems and normally fitted on military crafts. The working principle of the VD plant is as follows: Initially,... Continue Reading →

Fresh Water Generators

Freshwater generators are provided on board the ships for producing fresh water from sea water by distillation process: There are two types of fresh water generators: A) Vacuum Distillation Plants B) Vapour Compression Distillation Plants (VCDs) VACCUM DISTILLATION DISTILLATION PLANTS: In this type of plants the heat energy available in the engine the cooling water system is utilised... Continue Reading →

Hot Water System for Ships

This system provides hot water for showers and other areas in the accommodation spaces. The system consists of two hot water circulation pumps (one working + one standby), two geysers (heaters), normally one working on steam and the other on the electric system.   The electric heater is controlled by a thermostat which maintains a temperature... Continue Reading →

Operation of Oil Burner

The oil burner consists of a forced draught fan oil pump and nozzles. Depending on the number of nozzles, the burner is designated as a single stage or two stage or multi-stage burner.The fuel oil pump boosts the pressure of oil and supplies oil to the boiler furnace through nozzles in the form of a... Continue Reading →

STEAM SYSTEM

Steam is used on ships for the following purposes: As working medium for driving steam turbines where steam turbines are used for propulsion. For heating of fuel oil (oh high viscosity) in tanks to reduce viscosity. For geysers in accommodation spaces (for domestic use). For air conditioning system. For heaters of purifiers and fuel oil... Continue Reading →

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