Steam jet vacuum chiller design

[pmbvila]

Hello everybody

I am trying to calculate how much water I can chill from 20 to 10ºC (12 mbar-9 torr) using about 50 ton/h steam with an ejector system in a vacuum chiller.

The corresponding flash vapour in the drum is about 1.5% of water inlet flow. Is this vapour constantly removed through the ejector suction? Is the suction load the entire flash vapour quantity?

I think a two-stage intercondensing ejector system would work, but I need help calculating the required steam consumption. Given the suction load (flashed vap?) how do I calculate motive steam flow?

Thanks

 

[rmw]

The jet suction load is the flashed vapor plus the air that might be released from the water.

Go go

http://www.graham-mfg.com

and find a software called Vacworks and order one from the site. That will perform the calculations for you.

rmw