Asked by: Zarza Tanque
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What is the function of ejector?

Last Updated: 8th April, 2020

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An ejector is a device used to suck the gas orvapour from the desired vessel or system. An ejector issimilar to an of vacuum pump or compressor. The major differencebetween the ejector and the vacuum pump or compressor is ithad no moving parts.

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Moreover, what is the purpose of ejector?

The purpose of the ejector is to transportand compress a weight of induced fluid from the suction pressure tothe exit pressure. By staging ejectors it is possible toobtain a very large range of suction pressures from atmosphericdown to as low as one micron of mercury absolute.

Likewise, how does ejector create vacuum? Steam jet Ejectors are based on theejector-venturi principal and operate by passing motivesteam through an expanding nozzle. The nozzle provides controlledexpansion of the motive steam to convert pressure in to velocitywhich creates a vacuum with in the body chamber todraw in and entrain gases or vapours.

Moreover, what is the function of ejector in power plant?

Function of ejector:- The main function ofthe ejector is to extract air and no condensate gasses froma closed system . It removes air from the condenser and providevacuum. The amount of air extracted at the time of starting is moreas compared to running unit.

How does a water ejector work?

Water ejectors. Water ejectors are vacuumpumps, driven by a high pressure water (or similar medium)or steam. They use kinetic energy of the driving medium to suck ingases, vapors or other liquids and then discharge the resultantmixture against a counter pressure.

Related Question Answers

Darla Roux

Professional

What is the difference between ejector and eductor?

We use compressed air as a motive fluid. Hence theEductors can be used to transfer a considerable volume offluid from low pressure to high pressure with high compressionratio than ejectors. whereas the ejectors just suckthe excess volume of the system and maintains the system pressureaccurately.

Lihong Magnusson

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How does a hotwell work?

Hotwell. The bottom part of the condenser thatcollects the condensate formed after the steam performed itswork. A condensate pump removes the condensate from thehotwell and discharges it to the boiler feedpump.

Brandon Viruega

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How does a vacuum pump works?

Kinetic pumps do not typically have sealedvolumes but can achieve high compression ratios at low pressures.Positive displacement transfer pumps work by mechanicallytrapping a volume of gas and moving it through the pump.Capture pumps operate by capturing the gas molecules onsurfaces within the vacuum system.

Elm Ziehms

Explainer

How does air ejector work?

All ejectors operate on a common principle. Theyentrain air or other fluids in a high velocity jet ofpropelling air, steam, water or other fluid. And they usethe kinetic energy in the high velocity stream of that fluid topush back the atmosphere from the discharge of theejector.

Lupicina Shakhbazyan

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How does an ejector work on a gun?

The extractor removes the cartridge case from thechamber, essentially pulling the case to the rear. At some point inthe rearward travel, the case typically makes contact with theejector, which "kicks" the expended case out of the firearm,making room for an unfired cartridge to be loaded.

Dawn Paramo

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How does a surface condenser work?

A surface condenser is a commonly used term for awater-cooled shell and tube heat exchanger installed to condenseexhaust steam from a steam turbine in thermal power stations. Thesecondensers are heat exchangers which convert steam from itsgaseous to its liquid state at a pressure below atmosphericpressure.

Fengzhu Raba

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What is motive fuel flow?

Ejector motive pumps use the venturi effect totransfer fuel, using high pressure motive flow.Turbine type motive flow pumps use that same high pressuremotive flow to drive a turbine which moves fuel fromone tank to another. In general, motive flow is used infuel transfer between tanks in an aircraft.

Sahil Sempre

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How vacuum is maintained in condenser?

Condenser is mainly used to convert the lowpreassure steam at the end of the turbine to liquid so that theprocess is continued . Specific volume of water is much lower thanthe steam.Hence when the condensing process happens, volumeof steam reduces and basic vacuum is created.

Branimir Saa

Pundit

How is vacuum created?

A vacuum can be created by removing airfrom a space using a vacuum pump or by reducing the pressureusing a fast flow of fluid, as in Bernoulli's principle.vacuum; atmospheric pressureLearn why the lack ofatmospheric pressure in the vacuum of space makes suctioncups unusable there.

Markel Troiteiro

Pundit

What is ejector in steam turbine?

FUNCTION OF STEAM JET EJECTOR IN STEAMTURBINE. Air or gases to be evacuated enter the ejectorsuction, become entrained by the moving jet of steam, andare then discharged through the diffuser, where the velocity energyis converted into pressure, thereby compressing the mixture to alower vacuum.

Manjot Potua

Pundit

What is ejector condenser?

Ejector Condenser is a combination ofEjector which constantly ejects air to maintain a state ofvacuum inside of Vacuum Steam Condenser, by using steam, andcondenser which condensing and re-circulates the usedsteam.

Moruena Enigma

Teacher

What is an air eductor?

Eductor is a simple type of pump which works onthe 'venturi effect' to pump out air, gas or liquidfrom a specified area. This low pressure or vacuum enables theeductor to suck liquid or gas from a certain area. Thisliquid or gas is pumped out through the driving fluiddischarge.

Guilherme Benelli

Teacher

What does a vacuum ejector do?

Principle of Ejector
The operating principle of the ejector is thepressure energy in the motive fluid is converted to velocity energyby an adiabatic expansion in the Converging/Diverging Nozzle. Dueto the pressure drop of the motive fluid, it will create alow-pressure zone before the mixing chamber.

Nahid Polivkin

Teacher

What is jet ejector?

Very simply, an ejector is a pumping device. Ithas no moving parts. Instead, it uses a fluid or gas as a motiveforce. Very often, the motive fluid is steam and the device iscalled a “steam jet ejector.” Basicejector components are the steam chest, nozzle, suction,throat, diffuser and they discharge (Fig. 1).

Teodomiro Herback

Teacher

Why vacuum is required in steam turbine?

Vacuum applies to steam turbines becausethe pressure of saturated vapour above available cooling water iswell below 1 bar. So the condenser has such a vacuum andtakes exhausted steam from the turbine and givescondensate for feeding back to the boiler through condensateextraction pumps.

Omer Barbulescu

Reviewer

What is a venturi valve?

A venturi creates a constriction within a pipe(classically an hourglass shape) that varies the flowcharacteristics of a fluid (either liquid or gas) travellingthrough the tube. This is termed a Venturi Meter. Morecommonly, a venturi can use this negative pressure to draw asecond fluid into the primary flow.

Yuxin Zumalde

Reviewer

What is motive steam pressure?

The remaining velocity energy is then turned back intopressure across the diffuser. In simple terms, highpressure motive steam is used to increase thepressure of a fluid that is at a pressure well belowmotive steam pressure.

Haridiam Rohlwing

Reviewer

What is barometric condenser?

The Barometric Condenser is employed in a varietyof industries as an economical means of removing air, exhauststeam, and other vapors from vacuum equipment. A principal featureof the Barometric Condenser is that injection water may bedischarged through a tail pipe by gravity, without requiring apump.

Glady Hamdan

Reviewer

How does a deep well ejector work?

The deep-well ejector works in the sameway as the shallow-well ejector. Water is supplied to itunder pressure from the pump. The ejector then returns thewater plus an additional supply from the well, to a levelwhere the centrifugal pump can lift it the rest of the way bysuction.