Development of Multigeneration Waste-to-Zero System Using ORC, Sorption, and Drying-Based CCHP

This work investigates a combined cooling, heating, and power (CCHP) generation system utilizing waste energy. A cascade-CCHP system is developed, consisting of a 23.65-kWe organic Rankine cycle (ORC), a 4.00-kW adsorption chiller, a 4.11-kW absorption chiller, a 15.99-kW drying room, and an incinerator of 150 kg/h. A net energy production of 36.08 kWh is achieved from a CCHP energy efficiency of 9.98%. The levelized cost for producing a total energy output of 2,020,592 kWh over a lifespan of 20 years is approximately 0.106 USD/kWh. The life cycle assessment (LCA) yields a single score of approximately 0.000151 Pt, mainly attributed to raw materials used in the construction process of 87.16%. In addition, the combustion ash is processed into concrete blocks measuring 39 cm ´ 19 cm ´ 7 cm, in accordance with the Industrial Product Standard (TIS) 58-2533, with a water absorption value below 5% and a compressive strength exceeding 25 kg/cm2. The CCHP system demonstrates a novel method of waste-to-energy (WtE), and the construction material from waste combustion ash can also support a new concept of waste-to-zero (WtZ).