综合利用低品位余热与LNG冷能的复合循环系统

发布时间：2018-10-16 18:17

【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。
[Abstract]:A compound cycle system which can realize the comprehensive utilization of low grade thermal energy and liquefied natural gas (LNG) (LNG) cold energy is proposed to realize cycle matching and thermal cascade utilization in different temperature ranges. The thermodynamic performance of each part of the circulatory system is analyzed by using the thermodynamic law, and the influence of the key parameters of each part of the composite cycle system on the performance of the system is studied. The results show that the net generation efficiency and available energy efficiency of the system are 39.4% and 47.33% respectively under given working conditions, and the system performance is affected by the variation of circulating fluid state parameters and mass flow rate. The comprehensive effect of both determines the optimization direction of the system.
【作者单位】：西安交通大学热流科学与工程教育部重点实验室;西安热工研究院有限公司;
【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
【分类号】：TM611.3

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