What is the effect of high vacuum in condenser?

When a vacuum exists in the condenser, atmospheric air will leak into the condenser shell through flanges and other leakage points raising the condenser pressure. Dissolved gas in the water used to raise the steam will also enter the condenser along with the steam, but will not condense.

What causes the vacuum in the condenser?

As water and steam has a volume ratio of 1:1600; that means steam is condensed to the size of 1/1600 times than before. In other words, the specific volume of water at a given pressure is many times lower than that of steam. This enormous reduction in volume creates the vacuum inside the condenser.

What is condenser vacuum?

Process vacuum condensers are an integral part of a vacuum system. So often, a process vacuum condenser is considered stand-alone equipment, with little consideration given to how best to integrate it into a vacuum system. Common practice has the vacuum condenser specified as just another heat exchanger.

How do I improve my condenser vacuum?

10 Tips to Ensure Reliable Vacuum Condenser Performance

1. TIP 1: Conservatively Estimate Noncondensible Loading.
2. TIP 2: Understand Vapor-Liquid Equilibrium of the Vapor Components in Your Process.
3. TIP 3: Properly Elevate a Vapor Condenser.
4. TIP 4: Define the Range of Cooling Water Temperature and Flow Rate.

What happens when a condenser loses its vacuum?

A common cause of poor condenser vacuum is excessive air ingress or leakage. Any fall in condenser vacuum would have consequent rise in turbine heat rate vis-à-vis plant heat rate. As a result, cost of power generation would increase with eventual loss in revenue earning.

How does a vacuum condensate system work?

With the vacuum pump installed on the feed unit, the condensate returns under vacuum directly to the feed tank. It is stored under vacuum until required by the boiler water level control. Finally, note that eliminating your system’s vacuum return pumps will likely increase operating and fuel costs.

Which type of condenser will have high vacuum efficiency?

For higher vacuum air is removed by a separate pump fitted on the side of the condenser just at the same level as the condensing cone. In such case the condenser is known as a low level high vacuum jet condenser. See fig. 12-2.

What in the condenser will create a higher back pressure on the turbine loss of vacuum?

Lower Thermal Efficiency: The leaked air in the condenser results in increased back pressure on the turbine this means there is loss of heat drop consequently thermal efficiency of plant will decrease. So it requires more cooling water to condense more latent heat steam.

What is condenser depression?

Condensate depression is defined as the magnitude of condensed water over cooling in condenser’s. hot well. Under the absolute static pressure in condenser shell, it is the difference between condensed. water temperature cw. t and the saturation temperature of steam in condenser s.

What is TTD in condenser?

While TR is an indication of the amount of heat absorbed by the circulating water, TTD is a measure of the efficiency with which heat is transferred from the shell side of the tube to the water side. A lower TTD is always better, and all condensers are designed with a specific design TTD.

How do you evaluate the performance of a condenser?

The process used by Intek to analyze the performance of your condenser includes evaluation of operating conditions, excess back pressure calculation and identification, and assessment of vacuum pump performance. It also includes root cause analysis of excess back pressure, excess DO, and upset conditions.

What happens when a vacuum is in a condenser?

When a vacuum exists in the condenser, atmospheric air will leak into the condenser shell through flanges and other leakage points raising the condenser pressure. Dissolved gas in the water used to raise the steam will also enter the condenser along with the steam, but will not condense.

What happens to steam condenser when steam pressure is low?

Vacuum pump maintaining vacuum in steam condenser and as vacuum increases steam pressure at exit of turbine is low so results into fasten the condensation process. @D.B Jan I thank you Sir, meaning the condenser will be ineffective to condensate the exhausted steam from the low pressure turbine, that will results to load loss to the Rankine cycle.

Do All condensers in a boiler maintain vacuum?

Not all condensers maintain vacuum but definitely those working in boiler system do. Water is used to condense steam back to liquid water in any form of boiler system, whether on board ship or in power plants. As water and steam has a volume ratio of 1:1600; that means steam is condensed to the size of 1/1600 times than before.

What happens when you increase the pressure in the condenser?

Increasing the pressure in the condenser reduces the pressure across the turbine, which will reduce its output. The converse is also true. The only way to reduce the pressure in the condenser is to make it colder. “Did you get my e-mail?”