The barometric condenser is employed as a means of removing air and other vapors from vacuum equipment. The principal feature of the barometric condenser is that injection water may be discharged through a tail pipe by gravity, without requiring a pump.

.

Similarly, it is asked, how does a vacuum condenser work?

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

One may also ask, why vacuum is maintained in condenser? A vacuum is maintained in the condenser so that steam can easily flow and more work can be extracted from the steam in the turbine. Therefore, vacuum is maintained in the condenser using either vacuum pump or steam ejector.

Similarly, it is asked, how does a barometric leg work?

Barometric Leg. A barometric leg is basically a condensate drain. In a vacuum system that is used to condense steam and condensable vapors through heat exchangers or condensers, the condensate is normally dropped into a receiver tank that is often vented to atmosphere or a low-pressure vent system.

What is the use of condenser?

In systems involving heat transfer, a condenser is a device or unit used to condense a gaseous substance into a liquid state through cooling. In so doing, the latent heat is released by the substance and transferred to the surrounding environment.

Related Question Answers

Why is condenser used?

In thermal power plants, the purpose of a surface condenser is to condense the exhaust steam from a steam turbine to obtain maximum efficiency, and also to convert the turbine exhaust steam into pure water (referred to as steam condensate) so that it may be reused in the steam generator or boiler as boiler feed water.

How do you maintain a condenser vacuum?

The removal of air and other noncondensable gases from the condenser shell side is required for proper heat transfer from steam to cooling water in the condenser and, thus, to maintain high vacuum in the condenser.

Why it is called surface condenser?

Condense the steam by indirect contact, with the cold surface of the tubes in a shell-and-tube condenser. Thus the term surface condenser. Simply by condensing thru cold surface and not by direct mixing of cold fluid.

What is back pressure in condenser?

High Condenser Pressure Turbine exhaust back pressure is directly related to lost power output to the generator that converts mechanical energy to electrical power. Excess back pressure means reduced efficiency and dollars wasted.

How can leakage in condenser be detected?

Leakage is identified when helium migrates through the leak into the condenser, is expelled from the condenser steam space with other non- condensables in the off-gas, and is detected by a mass spectrometer.

How vacuum is created?

Vacuum, space in which there is no matter or in which the pressure is so low that any particles in the space do not affect any processes being carried on there. A vacuum can be created by removing air from a space using a vacuum pump or by reducing the pressure using a fast flow of fluid, as in Bernoulli's principle.

What are typical condenser tubes made of?

The most common tube materials in a condenser are copper–nickel alloys, brass, titanium, stainless steel, and ferritic stainless steel. Pitting is the most common form of damage in condenser tubing.

What is barometric leg height?

As 1" of Hg equals 1.133 feet of water, a minimum barometric leg of 29.5 feet is required. Note that this is the 'minimum' barometric leg height. It's normally recommended that a 34 foot barometric leg be provided which allows the system to pull a pure vacuum and still allows the water and condensate to drain freely.

What is barometric condenser?

The Barometric Condenser is employed in a variety of industries as an economical means of removing air, exhaust steam, and other vapors from vacuum equipment. A principal feature of the Barometric Condenser is that injection water may be discharged through a tail pipe by gravity, without requiring a pump.

How do you create a vacuum in a distillation column?

Vacuum distillation is the process of lowering the pressure in the column above the solvent to less than the vapor pressure of the mixture, creating a vacuum, and causing the elements with lower vapor pressures to evaporate off.

What is vacuum efficiency of a condenser?

What is the vacuum efficiency of a condenser? Answers: It is the ratio of the actual vacuum at the steam inlet to the maximum obtainable vacuum in a perfect condensing plant, i.e., it is the ratio of actual vacuum to ideal vacuum. What are the effects of air leakage in the condenser?

Why is vacuum needed?

While vacuum conditions are important in everyday life for items such as the incandescent light bulb, CRT's, and vacuum cleaners….., the need for vacuum conditions for life as a surface scientist is inescapable. As the density of gas molecules in the vacuum chamber decreases, the mean free path of particles increase.

What is the purpose of a hotwell?

Hot well is a tank or reservoir in which condensed hot water is collected from different steam lines. It's an integral part of Boiler feed water system. Purposes: Collects condensed water. Supply feed water.

What's a perfect vacuum?

Practically, it is impossible to make a perfect vacuum. A perfect vacuum is defined as a region in space without any particles. The problem is that to maintain a vacuum in a region you have to shield it from the environment. It is not difficult to make a container that would prevent atoms from entering the region.

What is the hot well of a condenser?

Condenser hotwells. Steam enters the condenser where it cools and condenses into water before being sent to the low-pressure feed-water heater. The condenser hotwell serves as a water reservoir for the turbine cycle. When hotwell level reaches the low point, a valve opens to supply make-up water to the cycle.

What is vacuum pressure?

Vacuum pressure is the difference between the atmospheric pressure and the absolute pressure. When the chambers are full and thus at atmospheric pressure, the needles would point to 29″. So this gauge represents the absolute pressure.

How do you make a vacuum ejector?

Steam jet Ejectors are based on the ejector-venturi principal and operate by passing motive steam through an expanding nozzle. The nozzle provides controlled expansion of the motive steam to convert pressure in to velocity which creates a vacuum with in the body chamber to draw in and entrain gases or vapours.

What is the maximum vacuum pressure possible?

Depending on pump design, the vacuum limit ranges from 28 to 29.5 in.-Hg or about 93% or 98% of the maximum theoretical value. For some pump types, the maximum vacuum rating will be based on this practical upper limit.

Does condensing steam create vacuum?

It does not create a perfect vacuum, of course, there is no perfect vacuum. It simply reduces the pressure according to the saturation pressure law for water (which is an equilibrium between water and vapor).