Design of S-CO2 coal-fired power system based on the multiscale analysis platform

被引:8
|
作者
Fan, Y. H. [1 ]
Yang, D. L. [1 ]
Tang, G. H. [1 ]
Sheng, Q. [2 ]
Li, X. L. [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, MOE Key Lab Thermofluid Sci & Engn, Xian 710049, Peoples R China
[2] Univ Edinburgh, Sch Engn, Edinburgh EH9 3FB, Midlothian, Scotland
基金
中国国家自然科学基金;
关键词
Modeling methodology; Multiscale; S-CO 2 coal-fired power plant; System net efficiency; Thermal-hydraulic performance; SUPERCRITICAL CARBON-DIOXIDE; CO2 BRAYTON CYCLES; HEAT-TRANSFER; OPTIMIZATION; PLANT;
D O I
10.1016/j.energy.2021.122482
中图分类号
O414.1 [热力学];
学科分类号
摘要
This work presents a design of 1000 MW S-CO2 coal-fired power system, containing not only a new methodology of S-CO2 power system modeling, but also the specific directions for engineering design. The coupling between computational fluid dynamic simulations at boiler scale and the mathematical modeling of the thermal cycle facilitates a high reliability of the comprehensive design. Our analysis helps identify key questions and then delivers specific directions for engineering design, especially for the pressure drop penalty in tail flue and thermal-hydraulic performance of cooling wall. The proposed flue split method coupled with parallel utilization method can not only effectively reduce the pressure drop penalty but also simplify the system heater configuration. Moreover, the thermal performance of S -CO2 cooling wall is improved by using the flue gas recirculation and cooling wall arrangement optimization. The optimized position and proportion of flue gas extraction are further obtained. Comprehensively, the proposed design of S-CO2 coal-fired power system enhances the system net efficiency up to 51.00%, with an efficient utilization of residual heat and cooling wall temperature below 700 degrees C. (c) 2021 Elsevier Ltd. All rights reserved.
引用
收藏
页数:15
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