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TRG-TRC011-EN 23
period two
Absorption Chiller Types
notes
Next, the refrigerant travels through the condenser, expansion device,
evaporator and absorber in a manner similar to refrigerant travel in the single-
effect absorption chiller.
The low-temperature generator pump returns the dilute absorbent solution
to the low-temperature generator to be reconcentrated. This cool dilute solution
passes through the low-temperature heat exchanger to be preheated by the
hot concentrated solution returning from the two generators.
The high-temperature generator pump draws a portion of the intermediate
solution from the low-temperature generator and delivers it to the high-
temperature generator to be reconcentrated. Some of this cooler intermediate
solution passes through the high-temperature heat exchanger to be
preheated by the hot concentrated solution coming from the high-temperature
generator. This reduces the heat energy required to boil the refrigerant inside of
the high-temperature generator. Precooling the concentrated solution returning
condenser
condenser
low
low
-
-
temperature
temperature
generator
generator
evaporator
evaporator
absorber
absorber
expansion
expansion
device
device
low
low
-
-
temperature
temperature
heat exchanger
heat exchanger
evaporator spray pump
evaporator spray pump
low
low
-
-
temperature
temperature
generator pump
generator pump
absorber
absorber
spray pump
spray pump
chilled
chilled
water
water
cooling
cooling
water
water
Figure 26
high
high
-
-
temperature
temperature
generator
generator
pump
pump
high
high
-
-
temperature
temperature
heat exchanger
heat exchanger
condensate
condensate
heat
heat
exchanger
exchanger
steam
steam
-
-
fired
fired
high
high
-
-
temperature
temperature
generator
generator
Figure 27