The exhausted heat losses in the PRC and inefficiency in medium and low heat source applications are significant challenges affecting the application of supercritical carbon dioxide Brayton cycle for renewable energy sources. To achieve efficient utilization

a precooler-free power/cooling combined system with superior heat source adaptability is proposed and analyzed. Integrating with the precooling-heating coupled module and the absorption power/cooling module instead of the PRC

the waste heat from the LTR is completely recovered

moreover

multiple operating modes ensure that the system performance unaffected by ambient temperature and seasonal changes.Parametric studies indicate that the TUR2 inlet temperature

the WHE1 outflow overheat degree

and the hot end temperature difference have significant effects on the Split Ratio

energy outputs

and the coupling relations among modules. Moreover

due to the improvement of irreversibility and the decrease of exergy losses

the three-largest exergy destructions occur in the IHE

the TUR1

and the RET+GEN

which account for 56.1%

6.9%

and 5.2%respectively. Furthermore

the optimized cases exhibit optimal η_(thermal)

η_(exergy)

c_(P

total)

and W_(net) of 84.2%

74.1%

9.48 dollars/GJ

and 397.4 MW respectively.