摘要
以环冷机末段出口低温烟气为有机朗肯循环(ORC)热源,建立系统热经济性能模型,并选取纯工质R600和R601a组成混合工质,研究不同混合工质质量分数和ORC关键参数对系统热力性能和经济性能的影响。结果表明,对于给定的ORC关键参数,随着混合工质中R601a质量分数(M_(R601a))的增加,系统净输出功率(W_(net))和[火用]效率(η_(ex))先下降后上升,而系统平准化能源成本(LEC)先上升后下降。当M_(R601a)一定时,系统W_(net)随蒸发温度(T_(6))增加先上升后下降,随过热度(ΔT_(7-1))增加而稳定下降。T_(6)越高,ΔT_(7-1)越低,系统η_(ex)越大。系统LEC随T_(6)增加逐渐变小,而随ΔT_(7-1)增加先下降后上升。在M_(R601a)和ORC关键参数变化范围内,纯工质R600的系统W_(net)和η_(ex)最大,表现出较好的热力性能,而纯工质R601a的系统LEC最小,显示出较好的经济性能。
The thermal economic performance model of the system is established by using the low-temperature gas at the outlet of the end of the annular cooler as the organic Rankine cycle(ORC)heat source,and the pure working medium R600 and R601a are selected to form the mixed working medium,and the effects of different mixed working medium mass fractions and key parameters of ORC on the thermal economic performance of the system are studied.The results show that,for a given ORC key parameter,with the increase of the R601a mass fraction(M_(R601a))in the mixed working medium,the net output power(W_(net))and exergy efficiency(η_(ex))of the system first decrease and then increase,while the levelized energy cost(LEC)of the system first increases and then decreases.When M_(R601a) is constant,the system W_(net) first increases and then decreases with the increase of evaporation temperature(T_(6)),and decreases steadily with the increase of superheat(ΔT_(7-1)).The higher the T 6,the lower theΔT_(7-1) and the greater theη_(ex) of the system.The LEC of the system gradually decreases with the increase of T_(6),and decreases first and then increases with the increase ofΔT_(7-1).In the variation range of M_(R601a) and ORC key parameters,the system W_(net) andη_(ex) of pure working medium R600 are the largest,showing better thermal performance,while the system LEC of pure working medium R601a is the smallest,showing better economic performance.
作者
冯军胜
王璐
严亚茹
赵亮
董辉
FENG Junsheng;WANG Lu;YAN Yaru;ZHAO Liang;DONG Hui(School of Environmental and Energy Engineering,Anhui Jianzhu University,Hefei 230601,Anhui,China;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)
出处
《烧结球团》
北大核心
2025年第3期149-158,共10页
Sintering and Pelletizing
基金
国家自然科学基金资助项目(51974087)
安徽省高等学校科学研究项目(2022AH050262)
安徽省自然科学基金资助项目(1908085QE203)。
关键词
烧结矿
余热回收
有机朗肯循环
混合工质
热经济性能
sinter
waste heat recovery
organic Rankine cycle
mixed working medium
thermal economic performance
