Basic Systems Flashcards
Definition of a system
A series of components and pipes that will deliver a substance from one point to another
Open loop system meaning
The working fluid is consumed
Example of a open loop system
A fuel system
Closed loop system meaning
The working fluid is reused
Example of a closed loop system
Fresh water cooling system
Good example of a system
A fuel system. Fuel moves from a main storage tank (deep down in the ship) and is delivered, in CLEAN WATER FREE conditions, to the injectors of a Diesel engine.
Types of tanks
Header tanks
Service tanks
Drain tanks
Header tanks use
Used as a reservoir, to top up tank or system
Service tank use
A reservoir for clean, water free supply of fuel
Drain tanks use
These collect oil from a system
Positive flow
Will fight through the resistance and create lots of pressure
Dynamic flow
Can’t cope with resistance but will produce large volume
Types of tank gauges
Contents gauge
Sounding tube (converging chart)
Gauge glass
What do strainers do
They are used to remove large, coarse particles, from a system.
Materials pipes are made from
Phosphor bronze, copper, copper nickel, brass, plastic
Reason for Material used for pipes
- Operating temperature
- The type of service being applied
- type of materials already used in the system
Where would phosphor bronze pipe be used
High pressure salt water system
Where would copper pipes be used
Domestic fresh water systems
Where would copper nickel pipes be used
Lub oil systems
What is brass used for on ship
Brass is used for casts eg taps or valves
What are plastic pipes used for
Plastic pipes are used for sewage pipes
What is the point in a content gauge
Indicates how much liquid is left in the tank.
Found of the side of the tank
How do sounding tubes work
- They are used to measure the depth of liquid in the tank
* Used along side dip tape and conversion charts
How do gauge glasses work
•They give a visual representation.
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How do you dip a tank
Similar to dipping a car engine the dip tape will be used to see the level of oil remaining in the tank, then a conversion chart will give a reading of
