Energy, exergy, economic, exergoeconomic, and exergoenvironmental (5E) analyses of a triple cycle with carbon capture

Abstract Waste heat recovery from industrial processes has attracted much attention in the energy field in the past few decades. This paper introduces a new configuration of the triple cycle including gas and steam cycles as well as an organic Rankine cycle (ORC), for energy recovery from the hot exhaust gas. Also, the amine carbon capture system (CCS) is used to separate and store carbon dioxide from the hot exhaust gas. For this novel system, energy, exergy, economic, exergoeconomic, and exergoenvironmental (5E) assessments are accomplished. The results reveal that adding steam and ORC cycles to the gas cycle increases the energy and exergy efficiencies to 71.8 and 73.7, respectively. However, integration of the CCS unit to this system reduces energy and exergy efficiencies to 50.5 % and 51.9 %. The economic results for the proposed system show that SPP and PP are both 1.5 years. Moreover, NPV and IRR are found to be 3.13 × 09 $ and 0.68 respectively. Moreover, the carbon capture system (CCS) unit can avoid 627,000 metric tons of CO2 emissions annually.