Purifiers and Clarifiers.

These are two centrifuges used onboard ships to separate two liquids with different densities from one another in the case of purifiers or to separate impurities from water in the case of clarifiers. Operations. They contain discs stacked up together numbering 150, separated from each other by a very small gap. A series of holes…

Freshwater Generator.

It is an auxiliary machinery used in ships to produce freshwater from seawater. The freshwater produced is used for domestic purposes such as cooking, drinking, heating, washing and for cooling of machinery parts. The major components of a freshwater generator are; vapour condenser, Demister, Evaporator,Orifice, Seawater pump,Brine ejector,Air ejector, Salinometer, Distillate pump,Swing valve. How the…

Generators.

A generator is a device that converts mechanical energy to electrical energy. The energy generated is used to power our everyday activities in homes, factories, ships. These generators are driven by prime movers such as steam turbines, gas turbines, internal combustion engines or hand cranks which drive the generators to produce electricity. Generators provide nearly…

Steam Turbines.

A steam turbine is a mechanical device that converts thermal energy from steam into mechanical energy. The steam generated from the boiler is heated to a very high temperature and pressure before it passes over the turbines at high speeds. The steam strikes the turbine blades at high speeds causing it to rotate on a…

Boilers.

Boilers are enclosed vessels used to produce steam, primarily for power generation. The steam produced can also be used for domestic purposes such as cooking, heating and sanitation. In power plants, boilers produce steam which are used to drive a turbine which generate electricity. Boilers require a source of heat which heats up the water…

Hydrogen powered ships.

Hydrogen powered ships are ships that are powered by electric motors supplied with electricity from a fuel cell, or use hydrogen as fuel in an internal combustion engine. While these vessels are not widely used, this technology has been demonstrated to be viable. There are several vessels with varying levels of hydrogen refuelling capability. Some…

Largest LNG powered container ship launched.

The world’s largest LNG powered container ship was launched in Shanghai in September 2019. It is the first ultra large vessel that will be powered entirely by liquified natural gas. Unlike other vessels that install expensive scrubbers to clean the exhaust gases of high sulphur content or other vessels that use low sulphur fuel to…

Hydrogen Fuel Cells.

A fuel cell is a device that converts stored chemical energy into electrical energy. Hydrogen fuel cells utilize hydrogen gas and oxygen gas as fuel. The products of the reaction are water, electricity and heat. This is a stark contrast to internal combustion engines, coal fired power plants and nuclear power plants which all produce…

Four stroke engines.

Four stroke engines are internal combustion engines that require four strokes of the piston to complete one cycle of operation. Strokes refer to the movement of the piston in upward and downward direction. The cycle of operation of the engine are; intake, compression, combustion, exhaust. Intake: During this stage, air is sucked into the cylinder…

Two Stroke Engines.

Two stroke engines are engines that require two strokes of the piston to complete one cycle of operation. In other words, the entire cycle of the engine operation which involves intake, compression, ignition and exhaust take place due to the movement of the piston in two strokes,(ie upward and downward movement of the piston in…