A Waste Energy Recovery Management for Electricity Generation from Two Temperature Grades of Energy Sources in Subcritical Organic Rankine Systems

Waste energy represents one of the most critical issues for economic utilization and management in modern industrial fields. This article outlines a scheme to utilize two different source temperature levels within envelope higher than 200 °C zones. Two regenerative organic Rankine cycles (RORC) were implemented construct compound cycle (CRORC) improve sources. These mini-cycles integrated throughout an intermediate economizer circuit extract certain amount from high-temperature level mini-cycle. R-123 was circulated due its high at evaporation condensation temperatures 160 50 °C, respectively. R-123, R-21, hydrocarbon R-600 used as working fluids low-temperature 130 35 The fluid mini-cycle superheated 170-240 whereas 180 °C. results showed that independent system (IRORC) requires more recovery by maximum 2% achieve same net power output. corresponds enhancement thermal efficiency compared one. revealed range 14% 15.6% test conditions. enhanced 2.5-5% arrangement. R-123/R-123 R-123/R-21 systems exhibited efficiencies R-123/R-600 3% 2%, Increasing superheat degree 10 80 has improved 7.6-7.9% examined pairs operating Keywords: cycle, regenerative, management, recovery,