Expansion machine e.g. scroll expander, driving system, has organic rankine-cylce including two preheat exchanger stages, where cooling agent flows through two preheat exchanger stages

摘要

The system has a cycle for cooling an internal combustion engine (2) for a motor vehicle. An exhaust gas heat exchanger (31) is provided for the internal combustion engine waste heat utilization. An organic rankine-cylce (9) drives an expansion machine and for flow with a heat exchanger medium. The organic rankine-cylce has a preheat exchanger stage (21), which preheats and/or evaporates the heat exchange medium, where another preheat exchanger (22) evaporates and/or over heats the heat exchange medium, where a cooling agent flows through the two preheat exchanger stages. An independent claim is also included for a method for operating an expansion machine of an organic-rankine cycle process.