Condenser is mainly used to convert the low preassure steam at the end of the turbine to liquid so that the process is continued . Hence when the condensing process happens, volume of steam reduces and basic vacuum is created. Simply as liquids takes up less volume than gases whenever a steam is liquified...
Correspondingly, why vacuum is important in the 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.
Furthermore, why does condensing steam create a vacuum? When matter turns from its gas phase back into its liquid phase, the molecules take up much less space and exert far less pressure. In fact, the condensing steam creates a partial vacuum—a region of much lower pressure than that of the surrounding atmosphere—inside the bottle.
People also ask, how is vacuum 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.
How does a vacuum condensate pump work?
The main reasons for having vacuum pumps on low pressure steam condensate return lines are AIR REMOVAL and PRESSURE REDUCTION. During mild weather when the boiler is on only part-time, the vacuum pump's main job is to mechanically remove air from the system so we don't have to use steam pressure to push air out.
Related Question Answers
What is condenser efficiency?
Condenser Performance. For a given steam turbine system, the performance of the condenser is largely a factor of how efficiently heat can be transferred from the steam to the cooling water. A condenser that can pull a stronger vacuum not only results in a higher cycle efficiency but also more potential power output.How do you keep the main condenser in a 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 do we need condenser?
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.Why it is called surface condenser?
Hi, Surface condensers are called as indirect condensers which separates satd vap & cold fluid mixes together. These condensers generally operate at low pressure with sat. temp of vap near to the atmospheric temp. This helps in preventing contamination of condensate with cooling water.Why is vacuum needed?
In the heat treating industry products can become oxidized if there are too many oxygen molecules present once the product is heated for processing. The vacuum pumps are used to reduce the percentage of oxygen molecules to a low level where they do not cause any problem.What is the function of surface condenser?
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.What is meant by 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. That is, a steam condenser is either a direct contact or indirect contact heat exchanger.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.What is vacuum example?
noun. The definition of a vacuum is a space devoid of air or matter, or a tool that uses suction to clean. An example of a vacuum is a space with nothing in it. An example of a vacuum is something used to clean up dirt on a floor.What is the unit of vacuum?
The SI unit of pressure is the pascal (symbol Pa), but vacuum is often measured in torrs, named for Torricelli, an early Italian physicist (1608–1647). A torr is equal to the displacement of a millimeter of mercury (mmHg) in a manometer with 1 torr equaling 133.3223684 pascals above absolute zero pressure.Is vacuum negative pressure?
Vacuum is a negative gauge pressure, usually referenced to the existing standard barometric pressure where the equipment will operate. This means vacuum is a differential reading between the surrounding atmospheric pressure and the pressure in the system evacuated.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.Is vacuum positive or negative pressure?
Clearly, Gauge pressure can be positive or negative . If the actual pressure is more than atmospheric pressure, than its gauge pressure will be positive otherwise if it is less than atmospheric pressure its value will be negative . This negative gauge pressure can be called vacuum pressure.What happens in a vacuum?
The first thing to do if you ever find yourself suddenly expelled into the vacuum of space is exhale. If you do die in space, your body will not decompose in the normal way, since there is no oxygen. If you were near a source of heat, your body would mummify; if you were not, it would freeze.What is PA in vacuum?
Measured in centimeters or inches of water lifted or in pascals (Pa). This is the maximum difference in pressure that a vacuum cleaner can create. Typical domestic vacuum cleaners can create a suction of 20 kPa. Pascal is a measure of pressure that equals to a pressure of 1 newton of force per square meter of area.What is vacuum process?
Vacuum drying Water and other liquids may accumulate on a product during the production process. "Vacuum is often employed as a process for removing bulk and absorbed water (or other solvents) from a product. Combined with heat, vacuum can be an effective method for drying."How can I make my vacuum stronger?
Probably the easiest way to create a vacuum at home is with a suction cup. If you press a suction cup flat against a wall and pull back, the inside of the cup will contain a vacuum. (This is why the cup sticks to the wall.) You can also create a vacuum inside of a syringe.Does steam rise in a vacuum?
When matter turns from its gas phase back into its liquid phase, the molecules take up much less space and exert far less pressure. In fact, the condensing steam creates a partial vacuum—a region of much lower pressure than that of the surrounding atmosphere—inside the bottle.What happens to steam in a vacuum?
To get water vapour in a vacuum you just remove the air molecules and leave the 20g per cubic metre of water molecules. That means taking the air molecules away doesn't have a large effect on the water molecules. 
