Study on boiler off-design performance of solar-aided power generation system

被引：0
|
作者：
Wu J. [1 ]
Han Y. [1 ]
Sun Y. [1 ]
机构：
[1] School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2022年 / 43卷 / 02期
关键词：
Boiler; Energy conservation; Off-design; Solar energy; Thermal economy;
D O I：
10.19912/j.0254-0096.tynxb.2020-0750
中图分类号：
学科分类号：
摘要：
The sub-systems of solar field, turbine and boiler in a solar-aided power generation system were modeled in this paper. And the performance of the boiler and thermal economic of the system were analyzed in a variety of typical integration solar heat input modes. The results indicate when solar heat is arranged before re-heaters, solar heat input will cause the reheating temperature of the boiler to drop which sacrifices the safety of the boiler and thermal economic of the system. However, when solar heat is arranged after re-heaters, solar heat input will have no influence on the temperatures of the main stream and reheated steam. Using solar heat to replace the 3rd-stage extraction steam is better than to replace the 1st-stage extraction steam in terms of the cycle specific work of the system, the standard coal consumption rate and the thermal-to-electricity efficiency. Finally, the case study shows when the 3rd-stage extraction steam is totally replaced by solar heat, the standard coal consumption rate decreases to 7.95 g/kWh, and the solar heat-to-electricity efficiency remains around 39%. © 2022, Solar Energy Periodical Office Co., Ltd. All right reserved.
引用
收藏
页码：345 / 350
页数：5
相关论文
共 12 条
  • [1] HU E, YANG Y P, NISHIMURA A, Et al., Solar thermal aided power generation, Applied energy, 87, 9, pp. 2881-2885, (2010)
  • [2] YING Y P, HU E., Thermodynamic advantages of using solar energy in the regenerative Rankine power plant, Applied thermal engineering, 19, 11, pp. 1173-1180, (1999)
  • [3] QIN J Y, HU E, NATHAN G J, Et al., Mixed mode operation for the solar aided power generation[J], Applied thermal engineering, 139, pp. 177-186, (2018)
  • [4] GUPTA M K, KAUSHIK S C., Exergetic utilization of solar energy for feed water preheating in a conventional thermal power plant, International journal of energy research, 33, 6, pp. 593-604, (2009)
  • [5] ZHAI R R, LIU H T, LI C, Et al., Analysis of a solar-aided coal-fired power generation system based on thermo-economic structural theory, Energy, 102, pp. 375-387, (2016)
  • [6] LI J L, WU Z Y, ZENG K, Et al., Safety and efficiency assessment of a solar-aided coal-fired power plant, Energy conversion and management, 150, pp. 714-724, (2017)
  • [7] WU J J, HOU H J, YANG Y P, Et al., Annual performance of a solar aided coal-fired power generation system (SACPG) with various solar field areas and thermal energy storage capacity, Applied energy, 157, pp. 123-133, (2015)
  • [8] WU J J, HOU H J, YANG Y P., Annual economic performance of a solar-aided 600 MW coal-fired power generation system under different tracking modes, aperture areas, and storage capacities, Applied thermal engineering, 104, pp. 319-332, (2016)
  • [9] ZHAO Y W, HONG H, JIN H G., Mid and low-temperature solar-coal hybridization mechanism and validation, Energy, 74, pp. 78-87, (2014)
  • [10] WU J J, HOU H J, YANG Y P., The optimization of integration modes in solar aided power generation (SAPG) system, Energy conversion and management, 126, pp. 774-789, (2016)
12