About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Energy Technologies and CO2 Management: Resource Efficient Processes
|
| Presentation Title |
Waste heat to power technology for aluminum electrolysis flue gas |
| Author(s) |
Xuejiao Li, Haichen Song, Wenbo Wang, Weicheng Wu, Jing Zhang |
| On-Site Speaker (Planned) |
Wenbo Wang |
| Abstract Scope |
Addressing the challenge of difficulties in comprehensive utilization of low-temperature flue gas waste heat from high-energy-consumption aluminum electrolysis operations within the "dual-carbon" (carbon peak and carbon neutrality) policy framework, this study developed a waste heat power generation system based on the Organic Rankine Cycle (ORC) principle. Air-like aluminum electrolysis flue gas, averaging ~140 °C, served as the heat source.The organic working fluid R245fa was selected, and a direct heat exchange configuration between the flue gas and the working fluid was implemented. An integrated system was established, comprising an insulated flue gas collection system, a flue gas-to-working fluid heat exchange system, an organic working fluid power generation system, a circulating cooling water system, an electrical power distribution system, and a centralized control system. The system is projected to achieve a thermal efficiency of 10.4%, enabling electricity savings of over 80 kWh per ton of aluminum produced. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Recycling and Secondary Recovery, Aluminum |