Exergoeconomic analysis and multi-objective optimization of a CCHP system based on SOFC/GT and transcritical CO2 power/refrigeration cycles

•A CCHP system based on SOFC/GT and transcritical CO2 cycles is proposed.•Transcritical CO2 power cycle operates well with cooling from refrigeration cycle.•Effects of some key parameters on the performance of the CCHP system are analyzed.•Economic viability of the CCHP system is assessed through exergoeconomic analysis.•Multi-objective optimization is conducted to seek the optimal design parameters.