Comparative Study of Three Power Generation Systems with Medium low Temperature Waste Heat Steam

Abstract:

A mathematical model for steam organic Rankine cycle (S ORC) power generation system at 150～350 ℃ was established. S ORC power generation system consists of steam Rankine cycle（SRC）and organic Rankine cycle（ORC）power generation systems. Thermal efficiency, exergy efficiency, operation pressure and capacity of the systems were compared under the same heat source conditions. The results show that under the condition of 150~210 ℃ heat source, ORC has the highest thermal efficiency, exergy efficiency and power generation. While under the condition of 210~350 ℃ heat source, the performance of S ORC has an advantage over SRC and ORC. Its thermal efficiency and exergy efficiency are higher than those of SRC and ORC power systems.