Continued from page 1
The lubrication of
shaft bearings must be done within chiller itself. Oil passages and shaft driven pumps (with motor driven pumps at startup) is made for lubrication.
The oil will find their way to condenser and has to be extracted back to lubrication system. Usually there will be an eductor system to suck back oil to oil sump.
Centrifugal chillers are usually designed for low-pressure refrigerant like R-123a.
These chillers sometimes surge when running, and they are very sensitive to sudden changes in loads. Therefore modern centrifugal chillers make use of electronic microprocessors to control various parameters and timing in order to run smoothly.
Indeed, when everything is perfect, centrifugal chiller is capable of extremely smooth operation.
Folks, be cool!
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