Optimized coupling analysis of Internal Combustion Engine (ICE)-ORC-MCRS

This paper refers to recovering of waste heat from hot gases discharged by internal combustion engines (ICE) at partial or full load using a Rankine Organic (ORC) cycle which drives a compressor of a mechanical compression refrigeration system (MCRS) to convert heat recovered into cooling power. The subject is of particular interest to the automotive and refrigeration industry with the aim of finding a feasible solution for the recovery of residual heat and turning it into a real source of commercial or industrial refrigeration. The heat recovery system is based on an ORC driven by SES36, a working fluid with good thermodynamic properties for the recovery of low temperature heat, as well as refrigeration or air conditioning refrigeration cycles. A scheme was proposed that combines the two systems so as to use the same working fluid, thus using a small number of subassemblies. After the energetic and exergetic calculations, it was proved that the ICE-ORC-MCRS system is of real interest due to the recorded performances, while the optimization of the thermodynamic scheme can be upgraded by improving the heat transfer at the level of the exchangers, but also constructively trying to streamline the scheme with new heat recovery.