The pure absorbate
condenses in the condenser at a condenser temperature (T ) to be
liquid at state 3. After that, the absorbate in liquid phase is throttled
to the evaporator at state 4 of which an evaporator pressure (P ) is
lower than that of the condenser. The evaporator is heated at a low
temperature (T ) around 0-20°C and the absorbate in form of vapor
enters the absorber which has the same pressure as the evaporator at
state 5. Meanwhile, liquid mixture from the generator, at state 6 is sent
through a solution heat exchanger at state 7 into the absorber to the low
pressure at state 8 through expansion device. In the absorber, the strong
solution absorbs the absorbate vapor and the weak solution leaves the
absorber at state 9 at a medium temperature (T ) around 40-50°C
which is same the condenser temperature (T ). The weak solution at
state 9 from the absorber is then pumped to the high pressure through
the solution heat exchanger at state 10 into the generator again at state
11 and new cycle restarts.