Chiller water used for process cooling
Chiller water used for process cooling
(OP)
Hi
I am providing chilled waetr to a 100L process vessel jacket where by purified water is manually poured into the vessel at 70 deg C. A coil surrounding the vessel within the jacket is linked to the chilled water system and is requireed to reduce the purified water in the vessel from 70 deg C to 40 deg C over a period of time ( say 10 minutes). The chilled water design conditions for the factory at 6/12 degc.
I dont have any design figures for the coil in the jacket surrounding the vessel. How can I ensure I dont send back water over 12deg C to the main chiller plant, do I need a heat exchanger to seperate the CHW system from the vessel jacket coil.? How do I size the pipework , kW cooling load for this?? Even an approximnate method would do fine, i understand the thermodynamics of the vessel are changing constantly as the water cools down and makes it a complex calculation plus I have no design info on the coil.
Any ideas>>>??
I am providing chilled waetr to a 100L process vessel jacket where by purified water is manually poured into the vessel at 70 deg C. A coil surrounding the vessel within the jacket is linked to the chilled water system and is requireed to reduce the purified water in the vessel from 70 deg C to 40 deg C over a period of time ( say 10 minutes). The chilled water design conditions for the factory at 6/12 degc.
I dont have any design figures for the coil in the jacket surrounding the vessel. How can I ensure I dont send back water over 12deg C to the main chiller plant, do I need a heat exchanger to seperate the CHW system from the vessel jacket coil.? How do I size the pipework , kW cooling load for this?? Even an approximnate method would do fine, i understand the thermodynamics of the vessel are changing constantly as the water cools down and makes it a complex calculation plus I have no design info on the coil.
Any ideas>>>??





RE: Chiller water used for process cooling
Rough estimation based on given states, I get a cooling load of ~20.4 kW.
RE: Chiller water used for process cooling
Do you care if the vessel gets below 40°C? Is the time limit fixed?
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RE: Chiller water used for process cooling
A mixing tank with hot and cold well is the other option.You would need to use a CHW loop out of this tank to cool the vessel and you can have much higher temperature rise in this loop and you can control the purified water temperature as well.Spill from cold well to hot well will ensure 12 C return back to the chiller.
RE: Chiller water used for process cooling
I like that idea of the mixing valve, it ensures my CHW retun temp is not any more than the design return so I will not upset the chillers. Any idea how i could get an estimation on cooling time if I sued say a 1 inch supply/reutn pipe?