Thermodynamic Analysis for the Combined Cooling and Power System of the Allam-LNG Cycle Integrated With Organic Rankine Cycle

被引：0

作者：

Chan W. ^{[1
]}

Li H. ^{[1
]}

Li X. ^{[1
]}

机构：

[1] State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Shaanxi Province, Xi’an

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 17期

关键词：

Allam cycle; carbon neutrality; combined cooling and power generation; exergy analysis; organic Rankine cycle;

D O I：

10.13334/j.0258-8013.pcsee.222225

中图分类号：

学科分类号：

摘要：

Power generation with low or even zero carbon emissions will be an important development direction in energy industry to achieve the goal of carbon peak and carbon neutrality in China. A combined cooling and power generation system composed of the Allam cycle and organic Rankin cycle (ORC) is proposed, which uses the cold energy of liquefied natural gas (LNG) to condense the turbine exhaust in the Allam cycle. The components in the system are modeled in detail and then four organic working fluids for the ORC bottom cycle are compared. Finally, a detailed parameter sensitivity analysis is conducted. The results show that the proposed system has better thermodynamic performance than the standalone Allam-LNG system, which does not include an ORC as bottom cycle. The proposed combined cycle using R170 as the organic working fluid has the highest electrical efficiency of 64.90% and exergetic efficiency of 45.29%. The results of parameter analysis show that the variation of the parameters in ORC does not affect the thermodynamic performance of the top cycle, and the exergetic efficiency and specific work of the combined cycle are increased with the increase in the ORC maximum pressure and the mass flow rate of the organic working fluid. The proposed combined cooling and power system in this paper effectively utilizes the cold energy released in the regasification process of LNG and increases the electrical efficiency of the Allam cycle. © 2023 Chinese Society for Electrical Engineering. All rights reserved.

引用

页码：6688 / 6697

页数：9

共 24 条

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