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20-09-2011, 02:37 PM #1
Removing scale from evaporative condensor by freezing
Hi all...
I have been sort of put in a position of looking into the cause of excessively high head pressures at our plant after a downsizing caught our refrigeration engineer and put him out the door.
What I have discovered is an extreme buildup of scale on the condenser tubes and a water treatment program that is ineffective. I would estimate at least 65% of the tube surface is covered and in many places the scale has actually bridged the gaps in the tube bundle. First - the provider of the water treatment service is being changed. Second - I need a stop gap solution to help out with the high head pressures until I can get a justification and condenser replacement worked in.
Mechanical cleaning has met with limited success, I am not yet ready to dive into a chemical cleaning and have heard you can freeze the condenser coils to cause the scale to crack and loosen its grip on the tubes. I understand the basics behind task, but would like some input on how best to accomplish.
Does anyone have a particular method they have used and had decent success?
thanks
Travis