Increased Low-grade Heat Source Power Generation Capacity with Ejector

A low-grade heat power generation system with an ejector (LGHPGE) was proposed based on the conventional Rankine power generation system (RPGS) to increase the low-grade heat source (LGHS) power generation capacity and improve energy efficiency in this paper. In the LGHPGE, an ejector and a second-stage steam generator were added to the RPGS. By the ejector, the turbine backpressure could be reduced, which made the pressure difference of the turbine increased, and further enhanced the system output capacity. In the second-stage steam generator, LGHS released heat again, which achieved energy cascade utilization and improved energy efficiency of LGHS.