Neglecting the pump work, Energy equation for vapor absorption refrigeration system may be written as [where, Q = heat transfer rate into the system]
1
Qgenerator + Qevaporator + Qcondencer + Qabsorber = 0
2
Qgenerator + Qevaporator + Qcondencer - Qabsorber = 0
3
Qgenerator + Qevaporator - Qcondencer + Qabsorber = 0
4
Qgenerator + Qevaporator - Qcondencer - Qabsorber = 0