A solid oxide fuel cell- supercritical carbon dioxide Brayton cycle hybrid system

New technologies are being developed to produce electricity cleaner and more efficient. Promising among these the solid oxide fuel cell supercritical carbon dioxide Brayton cycle. This study investigates potential of integrating both technologies. The is known as a potentially clean highly efficient technology convert chemical energy electricity. high operating temperatures (600–1000 °C) allow possibility bottoming cycle utilize quality excess heat also facilitate reforming processes, making it possible use higher hydrocarbons fuel. has received attention promising power It already been identified suitable for relatively low temperature, compared traditional gas turbines, sources several reasons. Firstly because efficiency, around 40%–45% common simple recuperative Secondly, turbine inlet temperature 700 °C low, well over 1000 air especially interest developers targeting lower avoid exotic expensive materials. And thirdly, can operate entirely above critical point. Therefore increases gradually with added waste exergy loss decreases be utilized steam Rankine where most boiling point pressurized water. A thermodynamic model cell- hybrid system explore analyze different concepts integration. Several conclusions drawn. found that recirculating cathodic efficiency size exchangers. applying pinch optimization exchangers but complexity while not much affected. Thirdly, recompression in stead significantly when stand-alone even more. finally, directly coupled cell-gas complex.