Standard designs for flooded chillers include both single tube and multipass provisions. For the single pass flow, the tubes are arranged such that the cooled liquid passes through all the tubes simultaneously and in only one direction.
Multiple circulation of the cooled liquid through the use of baffles or entrances that are screwed to the ends of the cooler. The arrangement of the outer deflecting plates determines the number of passages that the cooled liquid
from end to end before leaving the cooler. Even though two, four, and six-pass arrangements are the most common, in some cases more passages are used.
As in the case of a dry expansion chiller, some flooded chillers are designed with removable tube bundles, while others have pipe blades welded to the casing so that the tube bundle is not removable. However, when the end plates are unscrewed, the tubes become readily accessible
for cleaning and individual tubes can be removed and replaced if necessary.
In some flooded chiller designs, the casing is only partially filled with pipes in order to ensure a large area of steam discharge and relatively low velocity in the space over the pipes. This design eliminates the possibility of liquid spreading within the suction line and so is particularly well
suitable for heavy sudden increases in load.
