engineering

Marine pump

Marine pump is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Marine pump rather than just read about it. In short: A Marine pump is a pump which is used on board a vessel (ship) or an offshore platform. While data on typical commercial vessels are incomplete, marine pumps are estimated to account for 20–30% of installed machinery and 5–15% of total onboard energy use.

Key takeaways

Marine pump belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Marine pump to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Marine pump from memory before moving on to harder problems.

Reference excerpt

A Marine pump is a pump which is used on board a vessel (ship) or an offshore platform. While data on typical commercial vessels are incomplete, marine pumps are estimated to account for 20–30% of installed machinery and 5–15% of total onboard energy use.

Upper category It is a kind of general equipment, usually driven by an electrical motor, refer to pump category. It is widely used as a machine in marine industry, refer to marine industry category.

General A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. A marine pump is an important auxiliary equipment in marine industry and ship building industry. It is widely used in all kinds of marine vessels, such as barges, tug boats, containers, carriers, ships, vessels, fixed offshore structure, drilling jack-up rigs and so on. These marine pumps can be serviced for cooling, circulating, ballast, general service(G/S), fire-fighting, boiler feed water, condensate water, fresh(drinking) water, sanitary water, bilge & sludge, F.O. transfer, L.O. transfer, F.O. and F.S. cargo pumping, cargo stripping, hydrophone tank unit, sewage treatment unit, oil water separator, incinerator, fresh water generator, and so on.

Type Marine pump is named by its usage or application, it covers a lot of types of pumps, such as:

Centrifugal pump used to transport fluids by the conversion of rotational kinetic energy to the hydrodynamic energy of the fluid flow. The rotational energy typically comes from an engine or electric motor. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits. Gear pump uses the meshing of gears to pump fluid by displacement. It is one of the most common types of pumps for hydraulic fluid power applications. Gear pumps are also widely used in chemical installations to pump high viscosity fluids. There are two main variations; external gear pumps which use two external spur gears, and internal gear pumps which use an external and an internal spur gears (internal spur gear teeth face inwards, see below). Gear pumps are positive displacement (or fixed displacement), meaning they pump a constant amount of fluid for each revolution. Some gear pumps are designed to function as either a motor or a pump. Screw pump a positive-displacement (PD) pump that uses one or several screws to move fluids or solids along the screw(s) axis. In its simplest form (the Archimedes' screw pump), a single screw rotates in a cylindrical cavity, thereby moving the material along the screw's spindle.

Illustrations

Worked examples

Example 1 — a first encounter with Marine pump

Start with the simplest possible case. Write down what Marine pump claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Marine pump before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Marine pump ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Marine pump

In research: Marine pump appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Marine pump in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Marine pump is common in secondary-school and first-year university syllabi. It links to neighbouring topics Marine engineering, Pumps, so understanding it makes those chapters shorter.
In everyday life: Look for Marine pump outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Marine pump in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Marine pump means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Marine pump out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Marine pump in simple terms?

Why does Marine pump matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Marine pump?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Marine pump.