Partial heating supercritical carbon dioxide(S-CO_2) power cycle system is proven to be one promising option for waste heat recovery. By using LiBr-H_2O and NH3-H_2O as working fluids

two types of novel combined power systems consisting of a parting pre-heating S-CO_2 cycle and different absorption power cycle(APC)systems are proposed. The detailed mathematical models of the proposed parting heating S-CO_2/APC systems are built and verified. Based on the results of single-and multi-objective optimization

the performances of the proposed S-CO_2/APC system and the standalone S-CO_2 system are compared from the perspective of thermodynamics and economics. The single-objective optimization study reveals that the net power output and net efficiency of the S-CO_2/LiBr-H_2O system and the S-CO_2/NH_3-H_2O system increases by 7.40% and 4.30%

respectively

compared with the standalone S-CO_2 system. The multi-objective optimization results show that

the S-CO_2/LiBr-H_2O system and S-CO_2/NH_3-H_2O system can obtain improvements of 7.94% and 5.13% in net efficiency as well as promotion of 12.35% and 9.02% in the specific investment cost respectively

indicating that the S-CO_2/Li Br-H_2O system has a greater potential. Exergy loss analysis reveals that the main exergy loss exists in the coolers and the heaters

and the proposed S-CO_2/APC systems can significantly reduce the exergy loss in the S-CO_2 cooler by about 45%.