Auxiliary Engine

AUXILIARY ENGINE

A non-propulsion engine that provides power to a vehicle or machine. Auxiliary engines can be used in ships, aircraft, and other machinery. 

Compressor

Device for increasing the pressure of a gas by mechanically decreasing its volume. Air is the most frequently compressed gas but natural gas, oxygen, nitrogen, and other industrially important gases are also compressed.

Starting Air Supply

Provides compressed air for starting the ship’s main and auxiliary engines.

Control and Instrument Air

Supplies clean, oil-free, and moisture-free air for automation, instrumentation, and pneumatic controls.

Service Air

Delivers compressed air for onboard maintenance, such as cleaning machinery or operating pneumatic tools.

Emergency Systems

Supports critical emergency operations, such as lifeboat deployment and safety system activations.

Cylinder and Piston

Compresses the atmospheric air to an intermediate pressure during the initial stage. Further compresses the air to a higher pressure in a smaller cylinder.

Suction Valve

Allows air to enter the cylinder during the suction stroke. Allows intermediate-pressure air to enter the second-stage cylinder.

Delivery Valve

Allows compressed air to exit the cylinder after the compression stroke and pass into the first-stage cooler. Permits high-pressure air to exit the second-stage cylinder and enter the second-stage cooler.

Cooler

Reduces the temperature of the air compressed in the first stage to improve efficiency and prepare it for the second stage.

Crankcase

Provides structural support to the machine and houses the crankshaft and bearings.

Crankshaft

Converts the reciprocating motion of the pistons into rotational motion.

Connecting Rods

Transmit the reciprocating motion of the pistons to the crankshaft.

Cylinder Block

Supports the cylinders and ensures durability, allowing for easy replacement of liners during maintenance.

Lubrication System (Rotary-Gear Pump)

Supplies oil to the main bearings and connecting rod bearings through passages in the crankshaft to reduce friction and wear.

Cooling System

Supplies cooling water to maintain proper operating temperatures for the cylinders, heads, and coolers.

Water Jacket Safety Valve

Prevents excessive pressure build-up in the cooling system in case of a cooler tube burst or compressed air leakage.

Relief ValvesProtects against high temperatures by melting when air temperature exceeds safe limits, safeguarding reservoirs and piping.

Protect the compressor from overpressure by releasing excess air at the outlet of each stage.

Fusible Plug

Protects against high temperatures by melting when air temperature exceeds safe limits, safeguarding reservoirs and piping.

Cooler Drain Valves

Remove accumulated moisture from the coolers and unload the compressor during startup or shutdown.

Unloader Mechanism

Ensures the compressor starts in an unloaded state, reducing starting torque and clearing moisture from the system.

Non-Return Valve

Prevents compressed air from flowing back into the compressor, especially when unloaders are in use.

Automatic Drains

Automatically remove moisture and condensate from the coolers during operation.

Heat Exchangers

A device that transfers heat between two fluids without them directly coming into contact or mixing with each other.

Coolers

Remove excess heat from hot liquids using sea water as the cooling medium.

Heaters

Raise the temperature of liquids like heavy fuel oil or sea water.

Distillation System

Removes dissolved solids and impurities from sea water, reducing salt content from approximately 32,000 parts per million (ppm) to 1-2 ppm.

Evaporator Shell

The main chamber where sea water is boiled under reduced pressure.

Heating Coil

Provides heat using hot diesel engine jacket water or steam, causing the sea water to boil.

Water Separator

Prevents water droplets from mixing with the steam, ensuring only pure steam rises.

Condenser

Cools the steam into pure distilled water.

Distillate Pump

Draws off the condensed distilled water for storage or use.

Flow Controller

Regulates the amount of sea water entering the evaporation chamber.

Weir

Allows the overflow of concentrated brine, preventing salt build-up.

Combined Brine and Air Ejector

Removes excess brine and air to maintain reduced pressure inside the evaporator.

Flash Process Distillation System

A process where incoming seawater is pumped to a higher pressure and heated to near boiling. Through a series of stages, the seawater pressure is decreased to generate vapor that is condensed by the incoming seawater.

Flash Chambers

Chambers where the heated sea water flashes into steam due to reduced pressure.

Preheater

Uses steam to preheat the sea water before entering the flash chambers.

Demister

Removes water droplets from the steam in both flash chambers.

Distillate Pump

Collects distilled water from both stages.

Brine Pump

Removes concentrated sea water (brine) from the second-stage flash chamber.

Air Ejector

Maintains low pressure inside the chambers and removes gases released from sea water.

Oil/Water Separator

Used to ensure that ships do not discharge oil when pumping out bilges, oil tanks, or any oil-contaminated space. They ensure compliance with international legislation by reducing oil content in discharged water to less than 15 parts per million (ppm).

Coarse Separating Compartment

The initial chamber where some oil separates from the water due to its lower density and rises into the oil collection space.

Fine Separating Compartment

The section where the oil/water mixture flows slowly between catch plates, enabling further oil separation.

Catch Plates

Plates within the fine separating compartment where oil separates out, travels to the edges, and rises into the oil collection space.

Oil Collecting Space

Collects the separated oil from both compartments.

Central Pipe

Allows almost oil-free water to leave the separator unit. The water at this point has a purity level of 100 ppm or less.

Automatic Oil Discharge Valve

Releases the separated oil into a storage tank automatically.

Vent Valve

Releases air from the separator unit to prevent pressure buildup.

Heating Coils

Located in the upper or lower parts of the separator to heat the oily water. This reduces the viscosity of oil, improving separation efficiency.

Sewage Treatment

Are designed to manage and process sewage to prevent pollution, meet international legislation, and ensure safe discharge. Untreated sewage is harmful to marine life, depletes oxygen levels in water, causes unpleasant odors, and contains harmful bacteria.

Chemical Sewage Treatment

This system collects, treats, and stores sewage for controlled discharge in permitted areas or to shore facilities.

Storage Tank

Collects sewage and stores solid material for later disposal. Reduces liquid content by discharging washbasin, bath, and shower drains directly overboard (where permitted).

Settling Tank

Separates solid material from liquid. Solid material is stored for discharge into a sullage tank.

Flushing System

Treated liquid is recycled as flushing water for toilets.

Chemical Dosage Tests

Daily checks to ensure proper chemical levels, prevent odors, and avoid corrosion caused by high alkalinity.

Biological Sewage Treatment

This system uses bacteria to break down sewage into a safe, environmentally acceptable substance for discharge.

Aeration Compartment

Oxygen-loving bacteria (aerobic bacteria) digest sewage. Atmospheric oxygen is pumped in to support bacteria and micro-organisms.

Settling Compartment

Activated sludge (digested sewage) settles at the bottom. Clear liquid flows out for further treatment.

Chlorine Contact Compartment

Chlorinator kills any remaining bacteria using chlorine tablets. Chlorine tablets are replaced as needed.

Activated Sludge Recycling System

Continuously recycles sludge from the settling tank. Excess sludge is removed every two to three months and discharged in decontrolled areas.

Incinerator

A waste disposal system designed to comply with strict international pollution legislation. It ensures the complete combustion of waste oil, sludge, and solid refuse, forming a comprehensive waste management system when combined with a sewage plant and oil sludge facilities.

Combustion Chamber

A vertical cylindrical chamber lined with refractory material. Designed for high-temperature combustion of waste materials.

Auxiliary Oil-Fired Burner

Ignites refuse and oil sludge. Thermostatically controlled to minimize fuel consumption.

Sludge Burner

Burns oil sludge, water, and sewage sludge. Operates in conjunction with the auxiliary burner.

Forced Draught Fan

Provides combustion air through tangential ports at the chamber base. Ensures efficient burning by creating a swirling airflow.

Rotating-Arm Device

Enhances combustion by stirring waste material. Clears ash and non-combustible matter into an ash hopper.

Loading Door

Allows solid waste material, usually in sacks, to be loaded. Interlocked to stop the fan and burner for safety when opened.

Ash Hopper

Collects ash and non-combustible residue after combustion. Can be emptied overboard after use.

Liquid Waste Storage Tank

Stores liquid waste, heats it, and pumps it to the sludge burner for combustion.