Editing Engine room

{{Short description|Space where the propulsion machinery is installed aboard a ship}}
[[Image:DSCF0443.JPG|thumb|Main engine deck of a cargo vessel]]
[[Image:Bulk carrier general arrangement english.svg|thumb|right|Location of a ship's engine room on a bulk carrier]]
[[File:Engine room Caribbean Mercy.jpg|thumb|Engine room of the Mercy Ship Caribbean Mercy in 1997.  Her propulsion diesel is an MAK.]]
[[File:Davidson w.jpg|thumb|EMD diesels in the engine room of the Research Vessel Davidson circa 2002.]]
On a [[ship]], the '''engine room''' ('''ER''')<ref>Wise Geek: [https://www.wisegeek.com/what-is-the-engine-department-on-a-us-merchant-ship.htm ''What is the Engine Department on a US Merchant Ship?'']</ref> is the [[Compartment (ship)|compartment]] where the machinery for [[marine propulsion]] is located. The engine room is generally the largest physical compartment of the machinery space. It houses the vessel's prime mover, usually some variations of a heat engine ([[Marine steam engine|steam engine]], [[diesel engine]], [[Gas turbine|gas]] or [[steam turbine]]). On some ships, there may be more than one engine room, such as forward and aft, or port or starboard engine rooms, or may be simply numbered. To increase a vessel's safety and chances of surviving damage, the machinery necessary for the ship's operation may be segregated into various spaces.

The engine room is usually located near the bottom, at the rear or aft end of the vessel, and comprises few compartments. This design maximizes the cargo carrying capacity of the vessel and situates the prime mover close to the propeller, minimizing equipment cost and problems posed from long shaft lines. On some ships, the engine room may be situated mid-ship, such as on vessels built from 1900 to the 1960s, or forward and even high, such as on [[diesel-electric]] vessels.

==Equipment==
===Engines===
[[File:Vesikko engine room view aft.JPG|thumb|Engine room of the [[Finnish submarine Vesikko|Finnish submarine ''Vesikko'']] in 2010]]
The engine room of a motor vessel typically contains several engines for different purposes. Main, or propulsion, engines are used to turn the ship's [[propeller]] and move the ship through the water. They typically burn [[Diesel fuel|diesel oil]] or [[Fuel oil|heavy fuel oil]], and may be able to switch between the two. There are many propulsion arrangements for motor vessels, some including multiple engines, propellers, and gearboxes.{{citation needed|date=October 2015}}

Smaller, but still large engines drive electrical generators that provide power for the ship's electrical systems. Large ships typically have three or more [[Synchronization (alternating current)|synchronized]] generators to ensure smooth operation. The combined output of a ship's generators is well above the actual power requirement to accommodate maintenance or the loss of one generator.{{citation needed|date=October 2015}}

On a steamship, power for both electricity and propulsion is provided by one or more large [[Water-tube boiler|boiler]]s giving rise to the alternate name '''boiler room'''. High pressure steam from the boiler is used to drive [[reciprocating engine]]s or [[turbine]]s for propulsion, and also [[turbo generator]]s for electricity. Besides propulsion and auxiliary engines, a typical engine room contains many smaller engines, including [[Electric generator|generators]], air compressors, feed pumps, and fuel pumps. Today, these machines are usually powered by small diesel engines or electric motors, but may also use low-pressure steam.{{citation needed|date=October 2015}}

===Engine cooling===
{{Main|Engine cooling}}
The engine(s) get required cooling from [[Heat exchanger|liquid-to-liquid heat exchangers]] connected to fresh seawater or divertible to recirculate through tanks of seawater in the engine room. Both supplies draw heat from the engines via the coolant and oil lines. Heat exchangers are plumbed in so that oil is represented by a yellow mark on the flange of the pipes, and relies on paper type gaskets to seal the mating faces of the pipes. Sea water, or brine, is represented by a green mark on the flanges and internal coolant is represented by blue marks on the flanges.{{citation needed|date=October 2015}}

===Thrusters===
In addition to this array of equipment is the ship's thruster system (on modern vessels fitted with this equipment), typically operated by [[electric motor]]s controlled from the bridge. These thrusters are laterally mounted propellers that can suck or blow water from port to starboard (i.e. left to right) or vice versa. They are normally used only in maneuvering, e.g. docking operations, and are often banned in tight confines, e.g. [[drydocks]].{{citation needed|date=October 2015}}

Thrusters, like main propellers, are reversible by hydraulic operation. Small embedded hydraulic motors rotate the blades up to 180 degrees to reverse the direction of the thrust.{{citation needed|date=October 2015}} A variant on this is the [[azipod]], which are propellers mounted in a swiveling pod that can rotate to direct thrust in any direction, making fine steering easier, and allowing a ship to move sideways up to a dock, when used in conjunction with a [[bow thruster]].

== Engine Control Room ==
[[File:Engine_control_room_on_oil_tanker.jpg|alt=Engine_control_room_on_oil_tanker|thumb|Engine control room on modern merchant vessel]]
Modern merchant vessels have a special space inside the Engine Room called Engine Control Room (ECR). This is the place where all machinery could be remotely observed and controlled. There are situated also most of or at least main electricity breakers. ECR is connected with the Bridge through compulsory engine-room telegraph which provides visual indication of the                           orders and responses.<ref>{{Cite book |last=IMO |title=SOLAS Consolidated Edition 2014 |date=2014 |publisher=Marine Press |isbn=978-92-801-1594-9 |edition=6th |pages=98 |chapter=Chapter II-1}}</ref> Other means of communication are phone and emergency phone lines as well as [[Local area network|LAN]] cables or [[Fiber-optic cable|fiber-optic cables]] depending on distance.

Human presence is not required to be round the clock in the ER due to high level of automation and computerization. Unattended machinery spaces are common practice nowadays.

==Safety==
===Fire precautions===
Engine rooms are noisy, hot, usually dirty, and potentially dangerous.  The presence of [[flammable]] [[fuel]], high voltage (HV) electrical equipment and [[internal combustion engine]]s (ICE) means that a serious fire hazard exists in the engine room, which is monitored continuously by the ship's [[engine department]] and various monitoring systems.{{citation needed|date=October 2015}}

===Ventilation===
[[Image:SS Shieldhall engine room.jpg|thumb|Engine room of the {{SS|Shieldhall||6}}]]
If equipped with internal combustion or turbine engines, engine rooms employ some means of providing air for the operation of the engines and associated ventilation.  If individuals are normally present in these rooms, additional ventilation should be available to keep engine room temperatures to acceptable limits.  If personnel are not normally in the engine space, as in many pleasure boats, the ventilation need only be sufficient to supply the engines with intake air.   This would require an unrestricted hull opening of the same size as the intake area of the engine itself, assuming the hull opening is in the engine room itself.  Commonly, screens are placed over such openings and if this is done, airflow is reduced by approximately 50%, so the opening area is increased appropriately.  The requirement for general ventilation and the requirement for sufficient combustion air are quite different.  A typical arrangement might be to make the opening large enough to provide intake air plus 1000 Cubic Feet per Minute (CFM) for additional ventilation.  Engines pull sufficient air into the engine room for their own operation. However, additional airflow for ventilation usually requires intake and exhaust blowers.{{citation needed|date=October 2015}}

==History==
Engine rooms were separated from its associated [[fire room]] on fighting ships from the 1880s through the 1960s. If either experienced damage putting it out of action, the associated engine room could get steam from another fire room.{{citation needed|date=October 2015}}

==See also==
{{Portal|Transport}}
{{Commons category|Engine rooms}}
* [[Engine department]]
* [[Marine propulsion]]
* [[Marine fuel management]]
* [[Mechanical room]]
* [[Electrical room]]
* [[Fire room]]

== References ==
{{Reflist}}

== External links ==
{{Wiktionary}}
* [http://www.marinengineers.com Marine Engineers Network] 

* [https://shipvideos.net/engine_rooms/ Videos of engine rooms]

{{Webarchive|url=https://web.archive.org/web/20150512222116/http://www.marinengineers.com/ |date=2015-05-12 }}

{{DEFAULTSORT:Engine Room}}
[[Category:Ship compartments]]
[[Category:Marine propulsion]]