Aug 282013
 
mix ship-for passenger and goods
Basic definition of ship: special construction, tight, with capability for floating and traveling in given way, with one established speed and defined purpose. The ship represents one big floating complex system.

For safety cruising and to be functionaly, the ship must have some nautical qualities like: static qualities ( buoyancy, stability ) and dinamic qualities  (maneuvering, flowing ocillation capability, straight way capability and march qalities).
Some examples of maritime ships
A. Transportation ships for goods.

Transportation ships

cargo ship – transportation of goods;

Bulk Carrier

Bulk Carrier

Tankers

Tankers

Container Ship

Container Ship

Roll-on Roll-of -Ship

Roll-on Roll-of -Ship

LASH - ship

LASH – ship

Gray Hound

Gray Hound

mix ship-for passenger and goods

Mix Ship for passenger and goods

Ferry

Ferry

The ship is built and fitted with systems and installations to define its purpose.
Some systems and installations are usually met on every ship like: propulsion system, energy power system, ballast system…but other systems are specific for each type of vessel.
Regarding the equipments that are included in installations and systems, almost all are placed in Engine Room area.
For design the Machinery Arrangement it is absolutly necessary to know following elements:

    • Type of vessel;
    • Basic dimensions of ship (length, width, construction high, draft);
    • General arrangement;
    • Basic characteristic of equipments like external dimensions and very important, the weight.
    • External shape of vessel and ship compartments.

Division of ship in compartments represents the partition of ship inside, with transversal bulkheads, in tight compartments.
Machinery room represent the area where are placed most of main and auxiliary equipments and machineries and all very important installations of the ship.
Is a tight room and is limited by transversal bulkheads (fore, aft) and side shell (portside, starboard).
Inside engine room exist many rooms with different scope: DG room, workshop, purifier room, stores, etc.
Main equipment from machinery room is engine for propulsion (thatwhy called engine room), and around main engine are concentrated all auxiliary equipments and many of them serve the main engine function.

ENGINE ROOM CONCEPT

main engine

MAIN SCOPE AND CONNECTIONS OF SYSTEMS IN ENGINE ROOM
Amost all systems and installations serve main engine functionality, for example:

  • Fuel oil (HFO, DO, GO);
  • Air–for burning, for cooling, for start ME (and also outlet exhaust gas).
  • Oil -for oiling and cooling.
  • Water systems like: seawater, fresh water for cooling.

For all this items we need many equipments, which are included in systems and installations around ME. These equipments have the characteristics defined like minimum in M/E book and checked after also by rule requirements.
Almost all big equipments are arranged especially on decks from engine room (pumps, independent tanks, bottles, boilers…) and can be found like position in machinery arrangement drawings and like description in drawing “Equipment list in E/R” or Specification of vessel.
The abbreviations found in machinery arrangement drawings are clear specified in the piping diagrams in E/R.
The equipment positions depend on position of connection from M/E such as the piping route to be as short as possible. For the machinery arrangement are take in consideration the dimensions and weight of equipments (weight to be equal distribute in E/R area) and checked the necessary space for casually maintenance and access and the existing spaces available due to the ship structure.
For example the main engine line connections for fuel oil is usually on portside of main engine, oil system is connected bottom side and for water systems, connections are in starboard side of main engine. 

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