Why Vacuum Is Used In Condenser?

What is the principle of vacuum pump?

The vacuum pump functions by removing the molecules of air and other gases from the vacuum chamber (or from the outlet side of a higher vacuum pump if connected in series).

While the pressure in the chamber is reduced, removing additional molecules becomes exponentially harder to remove..

How is vacuum created in condenser?

So the condenser has such a vacuum and takes exhausted steam from the turbine and gives condensate for feeding back to the boiler; and thus any additional partial pressure of air hinders condensation, as wasteful collisions between the two kinds of molecules develop a thermal barrier, between the steam and and cooling …

How does an ejector work?

An Ejector works by accelerating a high pressure stream (the ‘motive’) through a nozzle, converting the pressure energy into velocity. Around the nozzle tip, where velocity is highest, a low pressure region is created. This is often called the suction chamber of the Ejector.

What is the purpose of interstage condenser?

Its function as part of the steam jet vacuum system is basically the removal of condensable vapor ahead of a given ejector stage, thus reducing the size of the ejector and the amount of steam required. Condenser function may be defined as follows: 1. Precondenser: Used for direct condensing of vapors from the process.

What are the three functions of a condenser?

A condenser’s function is to allow high pressure and temperature refrigerant vapor to condense and eject heat. There are three main types: air-cooled, evaporative, and water-cooled condensers.

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.

Why does a vacuum pump need oil?

2. Why is it so important to change the oil often in my vacuum pump? The proper oil in a vacuum pump acts as a blotter and absorbs all of the moisture and non-condensables. As the oil becomes saturated with these contaminants, the efficiency of the pump is dramatically reduced.

What is the purpose of ejector?

The purpose of the ejector is to transport and compress a weight of induced fluid from the suction pressure to the exit pressure. By staging ejectors it is possible to obtain a very large range of suction pressures from atmospheric down to as low as one micron of mercury absolute.

How do you calculate interstage pressure?

The ideal optimum interstage pressure for the equal compression ratio may also be calculated with [(132)(32)]1/2 + (0.34/2) = 65.2 bar. Fig. 4 shows the variation of each heat exchanger cooling load and compression power requirement for each stage as a function of first-stage discharge pressure.

Why do we need condenser?

A condenser is designed to transfer heat from a working fluid (e.g. water in a steam power plant) to a secondary fluid or the surrounding air. The condenser relies on the efficient heat transfer that occurs during phase changes, in this case during the condensation of a vapor into a liquid.

Why vacuum pump is used?

Vacuum pump mechanism is used to remove air or any gas particles from the container that creates vacuum in the vessel. It is used for various industrial applications. It is used in electronics manufacturing units to produce CRT tubes, electric bulbs and lamps, semiconducting materials, glass coating etc.

How does a condenser vacuum pump work?

Vacuum Pump remove non condensate vapors and the associated water vapor from the turbine condenser and accordingly lowers the operating pressure of the condenser which increases the amount of heat available for conversion to mechanical power. It also remove inward air leakage from the condenser.

What is the difference between a compressor and a condenser?

The gaseous refrigerant moves to the outdoor unit. Condenser coils in the outdoor unit house the refrigerant during its return to liquid form. The compressor increases pressure on the gas, causing it to condense into liquid. As the refrigerant changes state, it release the heat it contains.