摘要
烧结过程余热是目前我国颇具挖掘潜力的大宗余热资源之一。根据能级匹配用能原则,有机朗肯循环(ORC)是将环冷机出口中低温冷却废气余热提质利用的有效手段,但实施推广受到经济性制约。为此,研究了不同循环工质下ORC系统热经济性能随热力学参数的变化规律,同时对比了基本型和回热型ORC系统的热经济性能。研究表明:随着系统蒸发温度升高,系统热效率逐渐增大,系统平准化电力成本先减小后增大;随着冷凝温度降低,系统热效率增大,平准化电力成本减小。与基本型ORC系统相比,回热型系统热效率和平准化电力成本均较大。在系统热力学参数变化范围内,R245fa的系统热效率最大;当蒸发温度低于93℃时,R245fa的系统平准化电力成本最小,高于93℃时,R600a的系统平准化电力成本最小。
Sinter waste heat represents a large-scale,underutilized energy resource in China,with immense potential for industrial recovery.The organic Rankine cycle(ORC),guided by thermodynamic energy cascade principles,offers a viable pathway for valorizing low-grade waste heat from sinter cooling processes,yet economic feasibility remains a critical bottleneck for scaling.Therefore,the paper investigates the variation patterns of the thermo-economic performance of ORC systems with different working fluids under varying thermodynamic parameters,while conducting a comparative analysis between basic and regenerative ORC configurations.The results indicate that the system thermal efficiency rises gradually with rising the evaporation temperature,while the system levelized energy cost reduces first and then rises.The smaller the condensing temperature is,the greater the system thermal efficiency is,and the smaller the levelized power cost is.Compared with the thermal economic performance of basic ORC system,the thermal efficiency and the levelized power cost of regenerative ORC system are larger.The thermal efficiency of R245fa is the highest in the range of system thermodynamic parameters.When the evaporation temperature is lower than 93℃,the system levelized power cost of R245fa is the smallest.When the evaporation temperature is higher than 93℃,the system levelized power cost of R600a is the smallest.
作者
洪云川
江文豪
冯军胜
赵亮
董辉
Hong Yunchuan;Jiang Wenhao;Feng Junsheng;Zhao Liang;Dong Hui(Huatian Engineering and Technology Corporation of MCC;Anhui Jianzhu University;Northeastern University)
出处
《冶金能源》
北大核心
2025年第4期44-49,共6页
Energy For Metallurgical Industry
基金
国家自然科学基金资助项目(51974087)
中国宝武低碳冶金创新基金资助项目(BWLCF202307)
烧结矿回转均冷协同余热回收关键热工技术研发(2024021800091)。
关键词
烧结
环冷机
余热回收
有机朗肯循环
热效率
平准化电力成本
sinter
annular cooler
waste heat recovery
organic Rankine cycle
thermal efficiency
levelized power cost
