Performance enhancement of a solar-assisted pulverized coal power system by integrating a supercritical CO2 cycle

被引:4
|
作者
Li, Chao [1 ]
Sun, Yang [2 ]
Bi, Tianjiao [1 ]
Zhai, Rongrong [3 ]
机构
[1] Qingdao Univ Sci & Technol, Coll Electromech Engn, Qingdao 266061, Peoples R China
[2] Qingdao Univ, Coll Mech & Elect Engn, Qingdao 266071, Peoples R China
[3] North China Elect Power Univ, Minist Educ, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China
基金
中国国家自然科学基金;
关键词
Solar -assisted pulverized coal power system; S-CO; 2; cycle; Thermodynamic performance; Sankey diagram; DOUBLE-SOURCE BOILER; GENERATION SYSTEM; HEAT; ENERGY; OPTIMIZATION; PLANT; AREAS; FIELD;
D O I
10.1016/j.renene.2023.119501
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Current solar-assisted pulverized coal power (SPCP) systems lack the efficient cascading utilization of solar energy, resulting in its wastage. Therefore, there is a need to optimize the integration scheme between solar energy and pulverized coal power systems. In this study, the integration of two different supercritical CO2 cycles with SPCP systems is proposed to enable the cascaded utilization of solar energy. The thermal performances of the two proposed power systems are presented. Then, a sensitivity analysis is performed to examine the effects of supercritical CO2 cycle variables on the system. Finally, an economic evaluation is conducted to examine and compare the economic performance. The results demonstrate significant reductions in the extraction steam su-perheat and the exergy loss in feedwater heaters. Compared to SPCP systems, both proposed systems exhibit a decrease in the standard coal consumption rate by approximately 4.7 g/kWh. Sensitivity analysis shows that the CO2 mass flow rate has the most important effect on the system performance. The economic evaluation reveals that the cost of electricity for the two suggested systems increases by only about 0.04 cents/kWh. In summary, the findings suggest that the proposed power systems exhibit superior thermal performance and confirm its economic feasibility in the future.
引用
收藏
页数:16
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