摘要
为有效利用液化天然气(LNG)冷能,提出了一种基于LNG冷能与太阳能驱动的有机朗肯循环(ORC)系统。分别选择丙烷、丁烷、戊烷和己烷为ORC工质,分析了工质、不同区域日照时数和LNG流量对系统性能的影响。结果表明,采用己烷作为ORC工质时,LNG冷能回收量、系统净功、(火用)效率和综合效率高于其他3种工质,而总(火用)损则相反;日照时数增长有利于系统性能提升,故北方地区优于南方地区;LNG流量增大时,LNG冷能回收量、系统净功、(火用)效率和综合效率增大,总(火用)损平缓升高。
In order to effectively utilize liquified natural gas(LNG)cold energy,an Organic Rankine Cycle(ORC)system based on LNG cold energy and solar energy drive was proposed.Propane,butane,pentane and hexane were selected as ORC working mediums respectively.The effects of working mediums,sunshine duration in different regions and LNG flow on system performance were analyzed.The results show that when hexane is used as working medium,LNG cold energy recovery,system net work,exergy efficiency and comprehensive efficiency are higher than the other three working mediums,while total exergy loss is opposite.The increase of sunshine duration is conducive to the improvement of system performance,so the northern region is better than the southern region.When LNG flow increases,LNG cold energy recovery,system net work,exergy efficiency and comprehensive efficiency increase,and the total exergy loss increase gently.
作者
宁静红
王宁霞
王润霞
NING Jinghong;WANG Ningxia;WANG Runxia(Tianjin Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300134,China)
出处
《低碳化学与化工》
CAS
北大核心
2023年第2期168-173,共6页
Low-Carbon Chemistry and Chemical Engineering
基金
天津市研究生科研创新项目(2021YJSS295)。
关键词
LNG冷能
ORC系统
太阳能
系统热力学性能
LNG cold energy
ORC system
solar energy
system thermodynamic performance
