Vaccum due to steam condensation in a pipe

[subbuC3]

Hi,
I am working on tube side of the heat exchanger. In the case of tube side is blockd-in and the tube side contains steam. A vacuum will form due to the steam condensation as the shell side of the cold fluid continue. I am trying to find the vacuum due to steam condensation in the pipe.

Could you please help me in finding that.

Thanks.

 

[SeanB]

That is why you normally specify that the tubes must be good for Full Vacuum.

 

[subbuC3]

Thanks SeanB. But unfortunately tube side is not designed for full vacuum, tube side designed for 2.5psig vacuum. I know that the vacuum created due to steam condensation can be handled by the tubes. But I have to show how much vacuum will be created.

Thans

 

[insult2injury]

It's a constant volume process.

I2I

 

[StoneCold]

After the steam condenses the pressure in a blocked in exchanger would drop to the vapor pressure of water at what ever temperature the other medium in the exchanger is. Unless you are lucky enough to have some air trapped in the exchanger but I don't think you can count on that to save you.

Regards
StoneCold

 

[TBP]

In any event, you'll require a vacuum breaker on the steam side for operational purposes.