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44 TRG-TRC011-EN
notes
period three
Capacity Control
Purge System
As presented earlier, the accumulation of air and other noncondensable gases
undermines the efficiency and reliability of the absorption chiller. Since
absorption chillers operate below atmospheric pressure, regular operation of a
purge system is required to remove, or “purge,” the air and other
noncondensables that may leak into the chiller. This is necessary to maintain
the pressures and temperatures within the chiller for maximum efficiency. The
purge system is also used for early detection of leaks.
purge
purge
condenser
condenser
vacuum
vacuum
pump
pump
Figure 52