摘要
提出了一种可以实现低品位热能与液化天然气(LNG)冷能综合利用的复合式循环系统,以实现不同温度区间的循环匹配及热能梯级利用,并运用热力学定律对循环系统各部分性能进行热力性能分析,研究了复合循环系统各部分关键参数对系统性能的影响。结果表明:在给定工作条件下,系统的净发电效率和可用能效率分别达到了39.4%和47.33%;系统性能受循环工质状态参数和质量流量变化的共同影响,两者的综合作用效果决定了系统的优化方向。
A combined energy recovery system which comprehensively uses both low-temperature waste heat and liquefied natural gas （LNG）cold energy was proposed.This system can realize better temperature matching of different cycles and cascade utilization of the waste energy.Thermodynamic laws were adopted to analyze thermal performance of the system.Also,parametric analysis was performed to evaluate the effects of key factors on the system performance.The results show that this proposed system exhibited good performance,which can achieve the net electrical efficiency and exergy efficiency of 39.4% and 47. 33%,respectively.The system performance was influenced by both the state parameters and mass flow rate of working fluids,and the competition between both effects determined the overall system performance.
出处
《热力发电》
CAS
北大核心
2014年第12期49-55,共7页
Thermal Power Generation
基金
国家重点基础研究发展计划(2013CB22b304)
国家自然科学基金青年基金(51106128)
教育部新世纪优秀人才支持计划(NCET-13-0462)
中央高校基本科研业务费专项资金
关键词
低品味余热
超临界
CO2
循环
液化天然气
LNG
冷能
有机朗肯循环
热力学分析
回收利用
low grade waste heat
supercritical
carbon dioxide cycle
liquefied natural gas
LNG cold energy
organic Rankine cycle
thermodynamic analysis
recycling
