Recomended maximum outlet cooling water temperature
Recomended maximum outlet cooling water temperature
(OP)
Dear colleagues, Does anyone know of a written document / specification /reference for avoiding cooling water outlet from shell and tube exchangers above 120 F? Scale formation at this temperature occurs, but it is not easy to find a reference document / specs supporting this fact. Thanks





RE: Recomended maximum outlet cooling water temperature
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
RE: Recomended maximum outlet cooling water temperature
I am familiar with people using upper limits in the range of 45-50C.
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P.E. Metallurgy, Plymouth Tube
RE: Recomended maximum outlet cooling water temperature
"Nobody expects the Spanish Inquisition!"
RE: Recomended maximum outlet cooling water temperature
Some minerals start to drop at 60 C. Most minerals that are of concern for fouling are dropping like a rock at 80 C.
Obviously the type of water matters greatly. If it's closed loop cooling water where the water quality is monitored and treatment is maintained properly, you may be able to push the limits. If it's condensate, as long as you can handle the steam being generated you can ignore the limits, more or less. If it's raw water from a river or lake or worse still a well, look out- you could be in trouble with a water exit temperature of 40 C depending on what's in there.
RE: Recomended maximum outlet cooling water temperature
"A tube wall temperature not greater than 140°F (60°C) is a safe upper limit for treated cooling water."
-Christine
RE: Recomended maximum outlet cooling water temperature
If zebra musses are a problem, warmer outlet temperatures can greatly discourage their taking up residence.
CR
"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]
RE: Recomended maximum outlet cooling water temperature
RE: Recomended maximum outlet cooling water temperature
"Formal education is a weapon, whose effect depends on who holds it in his hands and at whom it is aimed." ~ Joseph Stalin