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26 TRG-TRC011-EN
notes
period two
Absorption Chiller Types
In the parallel flow cycle, the dilute solution from the absorber is split
between the low-temperature and high-temperature generators. Both streams
of dilute solution are concentrated in the generators and mix together again
before returning to the absorber. The parallel flow cycle can be implemented
using one generator pump (as shown in Figure 30) if a throttling device is used
to control the flow of solution to the low-temperature generator. Separate
generator pumps should be used for control over the full range of operating
conditions.
In the end, the performance of a double-effect absorption chiller has little to do
with the flow cycle employed. Instead, the performance depends on the choice
of operating conditions, the amount of heat transfer surface area, the
effectiveness of the purge system, the materials of construction, the design of
the controls, and the manufacturing techniques.
absorber
absorber
generator pump
generator pump
low
low
-
-
temperature
temperature
generator
generator
high
high
-
-
temperature
temperature
generator
generator
Figure 30