Thermodynamic investigation and optimization of two novel combined power-refrigeration cycles using cryogenic LNG energy

•Develop two novel combined cycles into optimal usage of LNG cryogenic energy.•Thermodynamic analysis and optimization of two novel proposed cycles.•uncertainty analysis of two novel combined cycles.•Increasing the cold energy utilized by novel cycles compared to direct LNG evaporation.•Reducing the exergy destruction of the heat transfer process using the novel cycles.