Conceptual Design of the Recuperator and Precooler for a 600MW Fossil-based Supercritical CO₂ Power Generation System

In a supercritical CO₂ (sCO₂) power generation system, printed circuit heat exchangers (PCHE) are always employed as the high temperature recuperator (HTR), low temperature recuperator (LTR) and precooler (PC). To study PCHE in detail and design HTR, LTR and PC conveniently, an universal model and the relevant procedure for PCHE were developed using FORTRAN, based on thermodynamic principle. To ensure the calculation accuracy, the model was verified according to the published experimental data. Then, the conceptual designs of HTR, LTR and PC for a 600MW fossil-based CO₂ reheat and recompression power generation system were completed, based on the present model. The results and conclusions can provide a basis for the design of fossil-based supercritical CO₂ Brayton cycle.