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Session: Session 6D: Supercritical-Transcritical Cycles
Session starts: Wednesday 11 September, 09:00
Presentation starts: 09:00
Room: Kallirhoe

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Fanxiao Meng (PHD)
Enhua Wang (Corresponding Author)

Abstract:
The wide utilization of renewable energy can relieve the energy crisis effectively. As a type of the renewable energy, geothermal energy is sustainable, abundant, environmentally-friendly, independent of various weather conditions and easily coupled with the conventional system. Among the low-temperature recovery technologies, transcritical CO2 Rankine cycle (TCRC), and organic Rankine cycle (ORC) and Kalina cycle have their own characteristics. This paper explored the thermodynamic performance of TCRC with the various turbine inlet pressure and temperature, and determines the optimal design operating condition for the 120℃geothermal heat source at first. Then, a comparative analysis of the thermodynamic performance of TCRC, ORC and Kalina cycle was presented under the optimal design operating condition. Results show that the net power output of TCRC is the largest while the ORC has advantages in term of thermal efficiency, whose value is 12.28%. However, the net power of ORC is the lowest, whose value is only 1556.34kW. The thermal efficiency and net power of Kalina cycle are 9.77% and 2704.68kW, respectively.