The absorption cycle is similar in certain respect to the electrically driven vapour compression machines.
Of the various solar absorption air conditioning systems, LiBr-H2O and H2O-NH3 are the major working fluid pairs available in these systems.
It is reported that the LiBr-H2O pair has a higher COP than any other pair ofthe working fluids.
The LiBr-H2O system operates at a generator temperature in the range of 343 to 368 K with water used as a coolant in the absorber and condenser.