Marine Engineering Systems

Turning Gear Motor

• A reversible electric motor that can be used to turn slowly a large diesel engine or steam turbine and gearbox assembly

Main Engine Remote Control System

• A system to control an engine installed in a vessel from an operating panel in the wheelhouse

Generator

• Output voltage of generators on ships with very large electrical loads can be 3.3 kV, 6.6 kV, and 11 kV
• Generators can be operated at low loads, but this can lead to negative consequences such as reduced efficiency, overcooling, and accumulation of moisture and condensation

Transformers

• Devices that transfer electric energy from one alternating-current circuit to one or more other circuits, either increasing or reducing the voltage

Engine Sump Tank

• No additional information provided

Manual and Remote Starting Procedures

• Lube oil temperature must be at least 90°F before connecting to the main switchboard

Load Monitoring and Management

• System allows users to control when a load is added or shed from a power system
• Prevents too many high-current loads from operating at the same time

ACB

• Used in ship electrical systems for their capability to provide both overcurrent and short-circuit protection, as well as additional features like adjustable trip settings and communication capabilities

Boiler Safety

• Boiler safety relief valve is a critical safety component that helps regulate pressure levels in the system
• Boiler flame eye is a photocell operated flame sensor that detects whether the burner is firing or not
• Deaerator valve is a device that removes dissolved gases like oxygen from a liquid
• Boiler control system is a set of devices and software that monitors and regulates the operation of a boiler

Boiler Operations

• Purging will remove any gases present in the furnace by forcing it out through the funnel
• Stop valve/main steam valve connects the boiler steam system to the steam main/header
• Blowing down the water level gauge is used to control boiler water parameters within prescribed limits to minimize scale, corrosion, carryover, and other specific problems
• Feed water pump is a specific type of pump used to pump feedwater into a steam boiler

Boiler Instruments

• Pressure gauge is usually located on the front of the boiler and has a green and red section that can be used to detect when the pressure is too low, too high, or just right

Exhaust Stack and Economizer

• Exhaust stack is the piping that conveys the hot combustion gases away from the boiler to the outside
• Economizer is a heat transfer product that removes heat from the flue gas and adds it to the incoming feed water

Corrosion and Water Analysis

• Causes of corrosion include water analysis factors such as chloride, pH level, and alkalinity

Main Engine Components

• Cascade tank, hot well, feed water tank, and condensate tank are all components of the main engine system
• Main engine is any internal combustion, compression-ignition engine that is configured to supply propulsion power for an ocean-going vessel

Cooling and Starting Systems

• Cooling water system removes heat from the engine and prevents it from overheating
• Starting air system provides compressed air to the engine cylinders to initiate the combustion process
• Fuel oil system delivers the fuel from the storage tanks to the engine cylinders, where it is injected and burned to produce power
• Lubrication system circulates oil throughout the engine to reduce friction and wear between the moving parts

Engine Temperatures and Preparations

• Fresh water cooling temperature before engine: 80°C (176°F) - 90°C
• Inbound and outbound cooling temperatures are not specified
• Temperature of fuel (HFO) in the service tank: 95°C
• Air blowing is carried out to release any moisture or other residues inside the cylinders
• Preparation of M/E before departure includes checking the M/E circ. fresh water temp stop/standby at 55°C