michael99
Chemical
- Nov 12, 2005
- 12
Hi everyone
What i am trying to do is size new control valves on the cooling medium output side.
What i have is a shell and tube heat exchagner where the process side flowrate is diminishing as a function of time. The cooling water in this case seawater is being manipulated to control the process side output to a fixed temperature i.e. 37 degrees.
I know the cooling water will decrease as a function of time. What i am trying to calculate is the future flow rate and seawater cooling outlet temp. Note i have overral future mass balances for the process side. I have done this originally on hysys steady state model adn get good predictions based against the original dsign. For the future prediction is it wise to fix the U value or delta P. Note i note in norsok a max temp of approx 50 degrees for seawater. If the temp goes above this i assume im in plugging tubes teritory (no problem as i have TASC)
You comments and technical advise is much appreciated.
REgards
Michael
What i am trying to do is size new control valves on the cooling medium output side.
What i have is a shell and tube heat exchagner where the process side flowrate is diminishing as a function of time. The cooling water in this case seawater is being manipulated to control the process side output to a fixed temperature i.e. 37 degrees.
I know the cooling water will decrease as a function of time. What i am trying to calculate is the future flow rate and seawater cooling outlet temp. Note i have overral future mass balances for the process side. I have done this originally on hysys steady state model adn get good predictions based against the original dsign. For the future prediction is it wise to fix the U value or delta P. Note i note in norsok a max temp of approx 50 degrees for seawater. If the temp goes above this i assume im in plugging tubes teritory (no problem as i have TASC)
You comments and technical advise is much appreciated.
REgards
Michael
