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LNG冷能梯级利用系统优化研究 被引量:13
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作者 杨红昌 鹿院卫 +1 位作者 马重芳 吴玉庭 《可再生能源》 CAS 北大核心 2011年第1期72-75,80,共5页
为了设计一种高效的LNG冷能回收方案,对不同压力下的LNG气化特性进行了分析,并据此构建了三级朗肯循环发电系统;针对剩余部分做功能力很小的冷能,制备厂区中央空调用冷冻水,提高整体冷能利用率。文章采用模拟计算的方法进行对比分析,结... 为了设计一种高效的LNG冷能回收方案,对不同压力下的LNG气化特性进行了分析,并据此构建了三级朗肯循环发电系统;针对剩余部分做功能力很小的冷能,制备厂区中央空调用冷冻水,提高整体冷能利用率。文章采用模拟计算的方法进行对比分析,结果表明,优化选择的梯级方案冷能利用率高达51.79%,与国际经验相比,已经接近甚至超过某些LNG接收站的LNG冷能利用率。 展开更多
关键词 液化天然气 气化特性 朗肯循环 冷能利用率
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LNG冷能发电技术分析对比 被引量:5
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作者 张颉 《云南化工》 CAS 2020年第12期157-159,共3页
总结了目前主流的LNG冷能发电技术,并分析比较了各自的优势和局限性。同时利用Aspenhysys软件模拟了几种主流的LNG冷能发电方案,并对各方案发电量和冷能回收效率进行对比,以优化LNG冷能发电技术,为提高LNG冷能回收效率提出建议。
关键词 LNG 冷能发电 冷能利用率
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Comparison of two schemes for district cooling system utilizing cold energy of liquefied natural gas 被引量:1
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作者 王弢 林文胜 顾安忠 《Journal of Southeast University(English Edition)》 EI CAS 2010年第2期316-319,共4页
Two schemes(scheme Ⅰ and scheme Ⅱ)for designing a district cooling system(DCS)utilizing cold energy of liquefied natural gas(LNG)are presented.In scheme Ⅰ,LNG cold energy is used to produce ice,and then ice i... Two schemes(scheme Ⅰ and scheme Ⅱ)for designing a district cooling system(DCS)utilizing cold energy of liquefied natural gas(LNG)are presented.In scheme Ⅰ,LNG cold energy is used to produce ice,and then ice is transported to the central cooling plant of the DCS.In scheme Ⅱ,return water from the DCS is directly chilled by LNG cold energy,and the chilled water is then sent back to the central plant.The heat transportation loss is the main negative impact in the DCS and is emphatically analyzed when evaluating the efficiency of each scheme.The results show that the DCS utilizing LNG cold energy is feasible and valuable.The cooling supply distance of scheme Ⅱ is limited within 13 km while scheme Ⅰ has no distance limit.When the distance is between 6 and 13 km,scheme Ⅱ is more practical and effective.Contrarily,scheme Ⅰ has a better economic performance when the distance is shorter than 6 km or longer than 13 km. 展开更多
关键词 district cooling system liquefied natural gas(LNG) cold energy utilization system efficiency
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A Novel Process for Natural Gas Liquids Recovery from Oil Field Associated Gas with Liquefied Natural Gas Cryogenic Energy Utilization 被引量:6
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作者 边海军 徐文东 +1 位作者 李秀喜 钱宇 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第3期452-461,共10页
A novel process to recovery natural gas liquids from oil field associated gas with liquefied natural gas (LNG)cryogenic energy utilization is proposed.Compared to the current electric refrigeration process,the propose... A novel process to recovery natural gas liquids from oil field associated gas with liquefied natural gas (LNG)cryogenic energy utilization is proposed.Compared to the current electric refrigeration process,the proposed process uses the cryogenic energy of LNG and saves 62.6%of electricity.The proposed process recovers ethane, liquid petroleum gas(propane and butane)and heavier hydrocarbons,with total recovery rate of natural gas liquids up to 96.8%.In this paper,exergy analysis and the energy utilization diagram method(EUD)are used to assess the new process and identify the key operation units with large exergy loss.The results show that exergy efficiency of the new process is 44.3%.Compared to the electric refrigeration process,exergy efficiency of the new process is improved by 16%.The proposed process has been applied and implemented in a conceptual design scheme of the cryogenic energy utilization for a 300 million tons/yr LNG receiving terminal in a northern Chinese harbor. 展开更多
关键词 liquefied natural gas utilization of cryogenic energy recovery of natural gas liquids exergy analysis
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基于临界区传热特性的LNG冷能与空分系统集成与优化
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作者 陈仕卿 许剑 谭春青 《工程热物理学报》 EI CAS CSCD 北大核心 2017年第8期1607-1612,共6页
本文提出了一种利用LNG冷能的新型空分流程,利用LNG冷能冷却进入氮压机的下塔顶部氮气并使其节流液化,部分液体作为产品输出,部分液体流入过冷器后进入上塔顶部完成回流,节流产生的高压氮返回LNG冷能换热器补充冷能。本文采用MATLAB编... 本文提出了一种利用LNG冷能的新型空分流程,利用LNG冷能冷却进入氮压机的下塔顶部氮气并使其节流液化,部分液体作为产品输出,部分液体流入过冷器后进入上塔顶部完成回流,节流产生的高压氮返回LNG冷能换热器补充冷能。本文采用MATLAB编程对该流程进行计算,并考虑冷热流体在临界区比定压热容随温度剧烈变化的特性,分析氮气压缩机入口温度与总压比对系统能耗、LNG冷能利用率的影响。计算结果表明:氮气压缩机入口温度的降低会同时降低氮压机耗功和LNG冷能利用率,系统等效能耗随其先降低后升高;氮气压缩机总压比的升高会增加氮压机耗功与LNG冷能利用率,但系统等效能耗随之降低;将氮气压缩机入口温度选定为准临界温度时冷能利用系统的等效能耗最低,LNG冷能的利用最高效,相较于已有文献研究结果,本研究所设计新流程的单位液体产品能耗与LNG冷能利用率等指标均有大幅度提高。 展开更多
关键词 LNG冷能 空分流程 准临界温度 冷能利用率 系统等效能耗
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Analysis of an Evaporator-condenser-separated Mechanical Vapor Compression System 被引量:8
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作者 Wu Hong Li Yulong Chen Jiang 《Journal of Thermal Science》 SCIE EI CAS CSCD 2013年第2期152-158,共7页
An evaporator-condenser-separated mechanical vapor compression (MVC) system was presented. The better effect of descaling and antiscaling was obtained by the new system. This study focused on the method of thermodynam... An evaporator-condenser-separated mechanical vapor compression (MVC) system was presented. The better effect of descaling and antiscaling was obtained by the new system. This study focused on the method of thermodynamic analysis, and the energy and exergy flow diagrams were established by using the first and second law of thermodynamics analysis. The results show that the energy utilization rate is very high and the specific power consumption is low. Exergy analysis indicates that the exergy efficiency is low, and the largest exergy loss occurs within the evaporator-condenser and the compressor. 展开更多
关键词 Mechanical vapor compression Sewage treatment THERMODYNAMIC EXERGY
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