Why steam ejectors are located above 10.33 meters only (or) What is Barometric leg ?
When steam ejectors are in operation a higher vacuum is created inside the system. If the system comes in direct contact with atmosphere the atmospheric air would enter the system and break the vacuum.
So we use water as a seal. But water also will be sucked by the vacuum to a height of 10.33 meters which is known as Barometric leg. If the steam ejector is kept below 10.33 meters the
barometric leg would be unstable and water will enter the system. (10.33 Meters of water = 760 mm of Hg)
The barometric line should be straight to ensure a perfect vacuum.
When steam ejectors are in operation a higher vacuum is created inside the system. If the system comes in direct contact with atmosphere the atmospheric air would enter the system and break the vacuum.
So we use water as a seal. But water also will be sucked by the vacuum to a height of 10.33 meters which is known as Barometric leg. If the steam ejector is kept below 10.33 meters the
barometric leg would be unstable and water will enter the system. (10.33 Meters of water = 760 mm of Hg)
The barometric line should be straight to ensure a perfect vacuum.
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.