Under the background of “carbon peaking and carbon neutrality”

coal-based poly-generation system will play a key role in achieving efficient and clean utilization of coal and meet people's energy demand in production and life. Based on the self-designed TPIS software platform

the models of key equipments

such as industrial boiler

back-pressure steam turbine

and absorption chiller/heat pump

are established. Moreover

various coal-based poly-generation systems' models are built and compared. The results show that

the coal consumption rate for heat supply of the combined heating and power system is significantly lower than that of the single boiler.The coal consumption rate of the scheme containing the single-effect absorption heat pump is the lowest. The performance of the combined cooling and power system is inferior to the standalone compression chiller. But it still has comprehensive advantages as part of combined cooling

heating and power system or considering the available waste heat. With the increment of the inlet temperature and inlet pressure of the steam turbine

the coal consumption rate of both the combined heating and power system and the combined cooling and power system shows a downward trend. The advantages and disadvantages of the coal-based poly-generation systems are discussed in detail

and the optimal engineering scheme is recommended

which has great engineering significance and high practical value.