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22 TRG-TRC011-EN
notes
period two
Absorption Chiller Types
In the high-temperature generator, very high temperature steam or hot
water flows through tubes that are immersed in an absorbent solution that is at
an intermediate concentration. The solution absorbs heat from the warmer
steam or water, causing the refrigerant to boil and separate from the absorbent
solution. As the refrigerant boils away, the absorbent solution becomes
concentrated and returns to the absorber.
The hot refrigerant vapor produced in the high-temperature generator migrates
to the low-temperature generator, where it flows through tubes that are
immersed in a dilute solution. The solution absorbs heat from the high-
temperature refrigerant vapor, causing the refrigerant in the low-temperature
generator to boil and separate from the absorbent solution. As that refrigerant
boils away, the concentration of the absorbent solution increases and it returns
to the absorber.
The low-temperature refrigerant vapor produced in the low-temperature
generator migrates to the cooler condenser. Additionally, the liquid refrigerant
that condensed inside the tubes of the low-temperature generator also flows
into the condenser.
steam or
steam or
hot water
hot water
refrigerant
refrigerant
vapor
vapor
refrigerant
refrigerant
vapor
vapor
condensed
condensed
refrigerant
refrigerant
high
high
-
-
temperature
temperature
generator
generator
low
low
-
-
temperature
temperature
generator
generator
condenser
condenser
to absorber
to absorber
Figure 25