Group contribution methods in thermodynamic cycles: Physical properties estimation of pure working fluids

摘要

Thermodynamic cycles consist of reverse cycles, such as refrigeration and heat pump, and positive cycles, such as organic rankine cycle. These cycles have been widely applied for cooling, heating and power generation. In general, the involved energy transfer in the thermodynamic cycles can be realized by the continuous change of physical properties of working fluids. Thus, the physical properties of working fluids are the foundation of cycle analysis. Furthermore, working fluids with appropriate properties can assure high-efficient, safe and economic operation of cycles.