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A power plant for integrated waste energy recovery from liquid air energy storage and liquefied natural gas 被引量:3
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作者 Tongtong Zhang Xiaohui She Yulong Ding 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第6期242-257,共16页
Liquefied natural gas(LNG)is regarded as one of the cleanest fossil fuel and has experienced significant developments in recent years.The liquefaction process of natural gas is energy-intensive,while the regasificatio... Liquefied natural gas(LNG)is regarded as one of the cleanest fossil fuel and has experienced significant developments in recent years.The liquefaction process of natural gas is energy-intensive,while the regasification of LNG gives out a huge amount of waste energy since plenty of high grade cold energy(-160℃)from LNG is released to sea water directly in most cases,and also sometimes LNG is burned for regasification.On the other hand,liquid air energy storage(LAES)is an emerging energy storage technology for applications such as peak load shifting of power grids,which generates 30%-40%of compression heat(-200℃).Such heat could lead to energy waste if not recovered and used.The recovery of the compression heat is technically feasible but requires additional capital investment,which may not always be economically attractive.Therefore,we propose a power plant for recovering the waste cryogenic energy from LNG regasification and compression heat from the LAES.The challenge for such a power plant is the wide working temperature range between the low-temperature exergy source(-160℃)and heat source(-200℃).Nitrogen and argon are proposed as the working fluids to address the challenge.Thermodynamic analyses are carried out and the results show that the power plant could achieve a thermal efficiency of 27%and 19%and an exergy efficiency of 40%and 28%for nitrogen and argon,respectively.Here,with the nitrogen as working fluid undergoes a complete Brayton Cycle,while the argon based power plant goes through a combined Brayton and Rankine Cycle.Besides,the economic analysis shows that the payback period of this proposed system is only 2.2 years,utilizing the excess heat from a 5 MW/40 MWh LAES system.The findings suggest that the waste energy based power plant could be co-located with the LNG terminal and LAES plant,providing additional power output and reducing energy waste. 展开更多
关键词 Waste energy recovery Power plant Liquid air energy storage Liquefied natural gas INTEGRATION
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优化30万方轻烃回收工艺研究与应用
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作者 尚玉明 刘柏林 王社民 《吐哈油气》 2001年第3期59-61,104,共4页
通过对30×10~4Nm^3/d轻烃回收装置现状分析,研究了影响该装置轻烃收率的因素以及提高轻烃收率的对策。为提高装置的产品收率,采用更新换热器提高原料气温度富化气质、给原料气压缩机排气管道及消音器增设外保温提高机组的压缩功率... 通过对30×10~4Nm^3/d轻烃回收装置现状分析,研究了影响该装置轻烃收率的因素以及提高轻烃收率的对策。为提高装置的产品收率,采用更新换热器提高原料气温度富化气质、给原料气压缩机排气管道及消音器增设外保温提高机组的压缩功率、更换干式空冷器为表面蒸发式空冷器降低冷凝分离温度,这些措施的实施使收率比改造前提高了20%。 展开更多
关键词 天然气 轻烃回收 装置 研究
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轻烃回收装置数据挖掘及生产优化 被引量:3
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作者 张运陶 杨晓丽 《计算机与应用化学》 CAS CSCD 北大核心 2005年第7期555-560,共6页
以控制制冷量提高液烃收率为目标,将膨胀机进口温度、出口温度及膨胀机进出口温差作为响应值,膨胀机转速、喷嘴压力、膨胀比、膨胀机进出口压差、原料气流量、原料气压力等8个工艺参数则构成影响响应值的主要变量。通过对某轻烃回收装... 以控制制冷量提高液烃收率为目标,将膨胀机进口温度、出口温度及膨胀机进出口温差作为响应值,膨胀机转速、喷嘴压力、膨胀比、膨胀机进出口压差、原料气流量、原料气压力等8个工艺参数则构成影响响应值的主要变量。通过对某轻烃回收装置进行生产数据挖掘,提出了优化该装置制冷系统的生产指导方案。生产试验表明,按该方案生产,可提高液烃收率5%以上。 展开更多
关键词 轻烃回收装置 天然气液化 数据挖掘 制冷量控制 优化 液烃收率
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