Cascaded recompression closed Brayton cycle system

摘要

The present disclosure is directed to a cascaded recompression closed Brayton cycle (CRCBC) system and method of operation thereof, where the CRCBC system includes a compressor for compressing the system fluid, a separator for generating fluid feed streams for each of the system's turbines, and separate segments of a heater that heat the fluid feed streams to different feed temperatures for the system's turbines. Fluid exiting each turbine is used to preheat the fluid to the turbine. In an embodiment, the amount of heat extracted is determined by operational costs.

主权项

1. A cascaded recompression closed Brayton cycle system comprising:
a first turbine operating at a first operating temperature and receiving a first turbine feed stream at a first turbine inlet and discharging a first turbine discharge stream at a first turbine discharge stream temperature; a second turbine operating at a second operating temperature and receiving a second turbine feed stream at a second turbine inlet and discharging a second turbine discharge stream at a second turbine discharge stream temperature; a first recuperator where the first turbine discharge stream transfers heat to the first turbine feed stream; and a second recuperator where the second turbine discharge stream transfers heat to the second turbine feed stream; and wherein the cascaded recompression closed Brayton cycle system further comprises: a first compressor discharging a first compressor discharge stream; a second compressor discharging a second compressor discharge stream; a first splitter for receiving the first compressor discharge stream and the second compressor discharge stream and forming the first turbine feed stream and the second turbine feed stream; and a recombination tank for receiving the first turbine discharge stream and the second turbine discharge stream and forming a compressor feed stream; and a second splitter for receiving the compressor feed stream and forming a first compressor feed stream and a second compressor feed stream.