The present invention relates to an ammonia GAX (GAX) absorption cycle in which the generator is heated and heat is recovered from the exhaust gas to maximize the cycle performance coefficient (COP).;One embodiment of the present invention includes a generator 10 for generating a refrigerant vapor and a refrigerant aqueous solution (weak solution) from a working solution (strong solution) by heat generated in a burner, a refrigerant vapor obtained from the generator 10 An evaporator 30 for evaporating the liquid refrigerant discharged from the condenser 20 by using cold water whose temperature has risen to make it a refrigerant vapor, a condenser 20 for condensing the liquid refrigerant discharged from the condenser 20, And an absorber (40) for producing a strong solution with a continuous absorption action which causes the weak solution to absorb the refrigerant vapor generated in the generator (10), wherein the GFD (11), the SHD The SCA 41, the GAX 42 and the HCA 43 are provided in the absorber 40, and the GAX 42 and the HCA 43 are provided in the absorber 40. The SCA 41, the partial condenser 14, A portion of the steel solution flowing into the upper portion of the SHD 12 through the outlet 42 of the GFD 11 and the outlet combustion gas of the GFD 11, And an auxiliary GFD (101) for supplying the air to the upper portion of the SHD (12).
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