化工学报2026，Vol.77Issue(2)：907-921,15.DOI:10.11949/0438-1157.20251012
基于RC318的铝电解槽侧壁余热发电系统的设计与实验分析
Design and experimental analysis for waste heat power generation system from aluminum reduction cell's sidewalls based on RC318 working fluid
摘要
Abstract
To evaluate the feasibility of organic Rankine cycle(ORC)technology for recovering waste heat from the sidewall of aluminum electrolytic cells,this paper designs and builds a medium-temperature waste heat ORC field experimental system,using RC318 as the working fluid,and conducts experimental research under completely sealed and recyclable conditions.By adjusting the evaporation temperature,condensation temperature,and the mass flow rates of both the working fluid and cooling water,the influences of key operating parameters on cycle performance were systematically investigated.The experimental results show that system performance is primarily governed by the thermodynamic matching between the evaporation and condensation processes.As the evaporation temperature increases,both the net power output and thermal efficiency improve,whereas an increase in condensation temperature leads to a significant deterioration in performance.When the evaporation temperature approaches the critical region of the working fluid,the performance enhancement exhibits a pronounced diminishing-marginal-returns behavior.The evaporator is identified as the component with the highest irreversibility within the system,with its exergy destruction first decreasing and then gradually leveling off as the evaporation temperature rises.The contribution of superheat degree to overall performance is limited,with noticeable effects primarily observed at low evaporation temperatures.Under the present experimental conditions,the maximum expander output power is 9.5 kW,and the cycle thermal efficiency and exergy efficiency are 8.8%and 33.96%,respectively.关键词
有机朗肯循环/铝电解槽/实验/余热回收/热力性能Key words
ORC/aluminum reduction cell/experimental/waste heat recovery/thermodynamic分类
能源科技引用本文复制引用
明勇,苏文,余亚雄,肖珍..基于RC318的铝电解槽侧壁余热发电系统的设计与实验分析[J].化工学报,2026,77(2):907-921,15.基金项目
国家自然科学基金项目(22308187) （22308187）
湖南省教育厅科学研究项目(25A0758) （25A0758）
