Publisher's Synopsis
Excerpt from Ice and Refrigeration in Connection With the Central Station
There are two compression systems in general use, the dry and the flooded. The main difference between the two is the condition of the ammonia in the expansion or freezing coils. In the dry system ammonia gas alone is present, while in the flood ed liquid ammonia is mixed with the gas. The dry system was originally employed, but the advantages claimed for the flooded system are bringing the latter into more general use.
In the flooded system the freezing coils contain liquid ammonia and gas at all times, but not in any definite proportion.
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